TROUBLESHOOTING ERROR CODE [DAFRMC]

ERROR CODE [DAFRMC]

CAN COMMUNICATION MONITOR PANEL – ENGINE CONTROLLER

Action code Error code CAN communication (Monitor panel – ENGINE controller):
Trouble Defective communication (Abnormality in objective component system) (Monitor
E03 DAFRMC panel system)
Contents of trouble • The monitor panel cannot recognize the ENGINE controller in the CAN communication circuit.
• Flashes the warning lamp and sounds the alarm buzzer.
Action of
• Limits the functions partly.
controller
• If cause of error disappears, system resets itself.
• The system may not work properly.
Problem that appears • Once the machine is stopped, its engine speed is limited to medium (half) speed.
on machine • Once the machine is stopped and started again, its travel speed is limited to 50%.
• The monitor panel does not display information.
• Method of reproducing error code: Starting switch ON.
• Indicate error code [DAFRKR], when the monitor panel cannot recognize the HST controller.
Related
• Indicate error code [DB2RKR], when HST controller cannot recognize the engine controller.
information
• Indicate error code [DAJRKR], when HST controller cannot recognize the monitor panel.
• Indicate error code [CA1633], when engine controller cannot recognize the HST controller.

Cause Standard value in normal state/Remarks on troubleshooting

★ Prepare with starting switch OFF, then carry out troubleshooting without turning
Short circuit in wiring starting switch.
1
harness CN-DT12 (male) Resistance
Between (3) and (10) 50 – 70 Ω
★ Prepare with starting switch OFF, then carry out troubleshooting without turning
starting switch.
Wiring harness between CN-S04 (female) (1), (6) – CN-
Disconnection in wiring
115 (female) (46), – CN-ST2 (female) (32), – CN-G01 Resistance Max. 1 Ω
harness
2
(Disconnection or defective contact in (female) (8), – CN-119 (female) (A), CN-DT12 (male) (3)
Possible causes and connector) Wiring harness between CN-S04 (female) (3) – CN-115
standard value in (female) (47), – CN-ST2 (female) (22), – CN-G01
normal state Resistance Max. 1 Ω
(female) (7), – CN-119 (female) (B), CN-DT12 (male)
(10)
★ Prepare with starting switch OFF, then carry out troubleshooting without turning
starting switch.
Wiring harness between CN-S04 (female) (1), (6) – CN-
Grounding fault in wiring 115 (female) (46), – CN-ST2 (female) (32), – CN-G01
Resistance Min. 1 MΩ
3 harness (female) (8), – CN-119 (female) (A), CN-DT12 (male) (3)
(Short circuit with ground circuit) and chassis ground
Wiring harness between CN-S04 (female) (3) – CN-115
(female) (47), – CN-ST2 (female) (22), – CN-G01
Resistance Min. 1 MΩ
(female) (7), – CN-119 (female) (B), CN-DT12 (male)
(10) and chassis ground

40-232 D51EX/PX-22
TROUBLESHOOTING ERROR CODE [DAFRMC]

Cause Standard value in normal state/Remarks on troubleshooting

★ Prepare with starting switch OFF, then turn starting switch ON and carry out trou-
bleshooting.
Wiring harness between CN-S04 (female) (1), (6) – CN-
Short circuit with power 115 (female) (46), – CN-ST2 (female) (32), – CN-G01
Voltage Max. 1 V
4 supply line circuit in wiring harness (female) (8), – CN-119 (female) (A), CN-DT12 (male) (3)
(Contact with 24V circuit) and chassis ground
Wiring harness between CN-S04 (female) (3) – CN-115
(female) (47), – CN-ST2 (female) (22), – CN-G01
Voltage Max. 1 V
(female) (7), – CN-119 (female) (B), CN-DT12 (male)
Possible causes and (10) and chassis ground
standard value in
normal state ★ Prepare with starting switch OFF, then carry out troubleshooting without turning
starting switch.
5 Defective CAN end point resistance
CN-119 (female) Resistance
Between (A) and (B) 100 – 140Ω
★ Prepare with starting switch OFF, then carry out troubleshooting without turning
Defective CAN end point resistance starting switch.
6
(Internal of monitor) CN-S04 (male) Resistance
Between (3) and (6) 100 – 140 Ω
Defective monitor panel or HST If causes 1 – 6 are not detected, monitor panel or HST controller may be defective.
7
controller (Since trouble is in system, troubleshooting cannot be carried out.)

Circuit diagram related to CAN communication

D51EX/PX-22 40-233
TROUBLESHOOTING ERROR CODE [DAJ000]

ERROR CODE [DAJ000]

HST CONTROLLER MEMORY ERROR

Action code Error code HST controller: Memory error

Trouble
– DAJ000 (HST controller system)

Contents of trouble • The information in the HST controller ROM (non-volatile memory) is abnormal.
Action of
• Use normal data only in the main area and in the backup area.
controller
Problem that appears
on machine
Related
information

Cause Standard value in normal state/Remarks on troubleshooting

Possible causes and Since trouble is in system, troubleshooting cannot be carried out. (If no visible error
1 Defective HST controller
standard value in appears on the machine, the controller can be continuously used as it is.)
normal state
Disconnection or grounding fault in The HST controller source power (VB) might have dropped when writing to memory.
2
wiring harness Carry out troubleshooting for [DAJ0KK].

40-234 D51EX/PX-22
TROUBLESHOOTING ERROR CODE [DAJ0KK]
12
ERROR CODE [DAJ0KK]

HST CONTROLLER LOWING OF SOURCE VOLTAGE

Action code Error code HST controller: Lowing of source voltage

Trouble
E04 DAJ0KK (HST controller system)

Contents of trouble • HST controller source voltage goes to 18 V or lower.

• Flashes the warning lamp and sounds the alarm buzzer.
Action of
• Limits the function partly.
controller
• If cause of the error disappears, the system resets itself.
• Once the machine is stopped, it cannot be restarted.
Problem that appears
• Monitor panel may not display data normally.
on machine
• The relays and solenoids may become inoperable, disabling the normal operation of the system.
• Power supply state of the HST controller can be checked with the monitoring code.
Related
(Controller: HST, Code: 03207 PWR IN BATT, Code: 03202 PWR IN BRY)
information
• Method of reproducing error code: Turn the starting switch ON.

Cause Standard value in normal state/Remarks on troubleshooting

1 Battery voltage drop Battery voltage 20 – 30 V
2 Defective fuse (F01-5 or 15) If the fuse is burn, the circuit probably has a grounding fault, etc. (See cause 4.)
★ Prepare with starting switch OFF, then carry out troubleshooting without turning
starting switch.
Wiring harness between CN-ST3 (female) (1), (11) – F01
Resistance Max. 1Ω
(15) outlet
Disconnection in wiring
harness Wiring harness between CN-ST3 (female) (2), (12), (22) –
3 Resistance Max. 1Ω
(Disconnection or defective contact in F01 (5) outlet
connector) Wiring harness between F01 (15E) – CN-T7 Resistance Max. 1Ω
Wiring harness between F01 (5B) – CNT8 Resistance Max. 1 Ω
Wiring harness between CN-ST3 (female) (21), (31), (32),
Resistance Max. 1Ω
(33) – chassis ground
Possible causes and
standard value in ★ Prepare with starting switch OFF, then carry out troubleshooting without turning
normal state starting switch.
Wiring harness between CN-ST3 (female) (1), (11) – F01
Resistance Min. 1 MΩ
Grounding fault in wiring (15) outlet and chassis ground
harness Wiring harness between CN-ST3 (female) (2), (12), (22) –
4 Resistance Min. 1 MΩ
(Short circuit with ground F01 (5) outlet and chassis ground
circuit)
Wiring harness between F01 (15E) – CN-T7 and chassis
Resistance Min. 1 MΩ
ground
Wiring harness between F01 (5B) – CN-T8 and chassis
Resistance Min. 1 MΩ
ground
★ Prepare with starting switch OFF, then turn starting switch ON and carry out
troubleshooting.
5 Defective HST controller ST3 Voltage
Between (1), (11), (2), (12), (22) and (21),
20 – 30 V
(31), (32), (33)

D51EX/PX-22 40-235
TROUBLESHOOTING ERROR CODE [DAJ0KK]
Circuit diagram related to HST controller power supply

40-236 D51EX/PX-22
TROUBLESHOOTING ERROR CODE [DAJ0KQ]
12
ERROR CODE [DAJ0KQ]

HST CONTROLLER MACHINE CODE ERROR

Action code Error code HST controller: Machine code error

Trouble
E03 DAJ0KQ (HST controller system)

• There is a disagreement between the selected machine model being saved on the HST controller and that on the machine.
Contents of trouble
• Do not select machine select mode.
• Flashes the warning lamp and sounds the alarm buzzer.
Action of
• Limits the function partly
controller
• Even if cause of error disappears, system does not reset itself until starting switch is turned OFF.
• The system may not work properly.
Problem that appears
• Once the machine is stopped, its engine speed is limited to medium (half) speed.
on machine
• Once the machine is stopped and started again, its travel speed is limited to 50%.
• Machine model codes being recognized by the controller can be checked with the monitoring mode.
Related
(Controller: HST, Code: 00204 MACHINE CODE) and (Controller: MONITOR PANEL,
information
Code: 00205 MACHINE CODE)

Cause Standard value in normal state/Remarks on troubleshooting

Possible causes and Confirm and record the machine model that the monitor panel and the HST controller
standard value in recognize in the real monitoring mode.
normal state 1 Defective machine model selection Make appropriate setting for the machine model in the machine model selection mode.
When setting for different machine model from the one that the HST controller recog-
nizes was made, carry out all initial setting.

D51EX/PX-22 40-237
TROUBLESHOOTING ERROR CODE [DAJ0KT]
12
ERROR CODE [DAJ0KT]

HST CONTROLLER MEMORY ERROR

Action code Error code HST controller: Memory error

Trouble
E03 DAJ0KT (HST controller system)

Contents of • The information in the HST controller PROM (non-volatile memory) is abnormal.
trouble (Both the main area memory and backup area memory are abnormal)
• Flashes the warning lamp and sounds the alarm buzzer.
Action of • Limits the functions partly.
controller • Clear all the memory and use default values.
• Even if cause of error disappears, system does not reset itself until starting switch is turned OFF.
• The system may not work properly.
Problem that
• Once the machine is stopped, its engine speed is limited to medium (half) speed.
appears on
• Once the machine is stopped and started again, its travel speed is limited to 50%.
machine
• The setting of machine model is also cleared, and [DAJ0KQ] appears.
Related
• Method of reproducing error code: Turn the starting switch ON.
information

Cause Standard value in normal state/Remarks on troubleshooting

Since trouble is in system, troubleshooting cannot be carried out.
Possible causes and
1 Defective HST controller (If no visible error appears on the machine after the machine model is reset and the
standard value in
initial adjustment is made again, the controller can be continuously used as it is.)
normal state
Disconnection or grounding fault in The HST controller source power (VB) might have dropped when writing to memory.
2
wiring harness Carry out troubleshooting for [DAJ0KK].

40-238 D51EX/PX-22
TROUBLESHOOTING ERROR CODE [DAJ5KK]
12
ERROR CODE [DAJ5KK]

HST CONTROLLER POWER SUPPLY LOWING

Action code Error code HST controller sensor 5 V power supply No.1: Lowing of source voltage/Input
Trouble
E04 DAJ5KK (HST controller system)

• Voltage of 5 V power output No.1 circuit of the HST controller went to 4.5 V or lower or 5.5 V or higher.
Contents of trouble
• Abnormal current flowed in HST controller sensor 5 V power supply No. 1
• Flashes the warning lamp and sounds the alarm buzzer.
Action of • Stops output of 5 V power No.1 circuit.
controller • Limits the functions partly
• Even if cause of error disappears, system does not reset itself until starting switch is turned OFF.
Problem that appears • Once the machine is stopped, it cannot be restarted.
on machine • The system may not work properly.
• If this failure occurs, individual error codes of the target components of power supply such as the pressure sensor and potentiom-
Related
eter are displayed and recorded at the same time.
information
• Method of reproducing error code: Turn the starting switch ON.

Cause Standard value in normal state/Remarks on troubleshooting

Disconnect connector with starting switch OFF, then turn starting switch ON and carry
out troubleshooting.
Defective travel potentiometer Travel potentiometer CN-EL connector
Defective fuel dial potentiometer
Defective brake potentiometer Fuel dial potentiometer CN-FP connector
Sequentially disconnect the
Defective left HST pump devices suggested on the Brake potentiometer CN-BP1 connector
1
pressure sensor right and if error code is not Left HST pump
Defective right HST lit and displayed (reset CN-LP connector
pressure sensor
pump pressure sensor display), internal component
Defective brake pressure sensor may be defective. Right HST pump pressure
CN-RP connector
sensor
Brake pressure sensor CN-BS connector
★ Prepare with starting switch OFF, then carry out troubleshooting without turning
starting switch.
Grounding fault in wiring
Possible causes and 2 harness Wiring harness between CN-ST2 (female) (22) – CN-EL
standard value in (Short circuit with ground circuit) (female) (4), (5), – CN-BS (female) (3), – CN-RP (female)
Resistance Min. 1 MΩ
normal state (3), – CN-LP (female) (3), – CN-BP1 (female) (C), CN-
FP (female) (A) and chassis ground
★ Prepare with starting switch OFF, then turn starting switch ON and carry out
troubleshooting.
Wiring harness between CN-ST2 (female) (22) – CN-EL
Short circuit with power supply line (female) (4), (5), – CN-BS (female) (3), – CN-RP (female)
3 circuit wiring harness Voltage Max. 1 V
(3), – CN-LP (female) (3), – CN-BP1 (female) (C), CN-
(Contact with 24 V) FP (female) (A) and chassis ground
If the wiring harness is short circuit with power supply line circuit in wiring harness, the
controller and each sensor may be defective, too. Check them after repairing wiring har-
ness.
★ Prepare with starting switch OFF, then turn starting switch ON and carry out trou-
bleshooting.
4 Defective HST controller
CN-ST1 (female) Voltage
Between (22) and (21) 4.5 – 5.5 V

D51EX/PX-22 40-239
TROUBLESHOOTING ERROR CODE [DAJ5KK]
Circuit diagram related to HST controller sensor 5 V power supply No. 1

40-240 D51EX/PX-22
TROUBLESHOOTING ERROR CODE [DAJ6KK]
12
ERROR CODE [DAJ6KK]

HST POWER SUPPLY LOWING

Action code Error code HST controller sensor 5 V power supply No.2: Lowing of source voltage/Input
Trouble
E03 DAJ6KK (HST controller system)

• Voltage of 5 V power output No.2 circuit of the HST controller went to 4.5 V or lower or 5.5 V or higher.
Contents of trouble
• Abnormal current flowed in HST controller sensor 5 V power supply No. 2
• Flashes the warning lamp and sounds the alarm buzzer.
• Stops output of 5 V power No.2 circuit.
Action of
• Stops use of the HST motor speed sensor.
controller
• Limits the functions partly.
• Even if cause of error disappears, system does not reset itself until starting switch is turned OFF.
• The system may not work properly.
Problem that appears
• Once the machine is stopped, its engine speed is limited to medium (half) speed.
on machine
• Once the machine is stopped and started again, its travel speed is limited to 50%.
• If this error occurs, individual error codes of the target devices of power supply such as the HST motor speed sensor are dis-
Related
played and recorded at the same time.
information
• Method of reproducing error code: Turn the starting switch ON.

Cause Standard value in normal state/Remarks on troubleshooting

★ Prepare with starting switch OFF, then turn starting switch ON and carry out
troubleshooting.

Defective left HST motor speed Right HST

Sequentially disconnect the CN-RRS2 connector
sensor motor speed sensor
1 devices suggested on the
Defective right HST motor speed right and if error code is not
sensor lit and displayed (reset dis-
play), internal component
Left HST
may be defective. CN-LRS2 connector
motor speed sensor

★ Prepare with starting switch OFF, then carry out troubleshooting without turning
Possible causes and Grounding fault in wiring starting switch.
standard value in 2 harness Wiring harness between CN-ST3 (female) (34) – CN-
normal state (Short circuit with ground circuit) LRS2 (female) (A), – CN-RRS2 (female) (A) and chassis Resistance Min. 1 MΩ
ground
★ Prepare with starting switch OFF, then carry out troubleshooting without turning
starting switch.
Wiring harness between CN-ST3 (female) (34) – CN-
Short circuit with power supply line
3 circuit wiring harness LRS2 (female) (A), – CN-RRS2 (female) (A) and chassis Voltage Max. 1 V
(Contact with 24 V) ground
If the wiring harness is short circuit with power supply line circuit wiring harness, the
controller and each HST motor revolution sensor may be defective, too. Check them
after repairing wiring harness.
★ Prepare with starting switch OFF, then turn starting switch ON and carry out
troubleshooting.
4 Defective HST controller
HST controller Voltage
Between CN-ST3 (34) and CN-ST2 (39) 4.5 – 5.5 V

D51EX/PX-22 40-241
TROUBLESHOOTING ERROR CODE [DAJ6KK]
Circuit diagram related to HST controller sensor 5 V power supply No. 2

40-242 D51EX/PX-22
TROUBLESHOOTING ERROR CODE [DAJRKR]
12
ERROR CODE [DAJRKR]

CAN COMMUNICATION HST CONTROLLER DEFECTIVE

Action code Error code CAN communication (HST controller – Monitor panel):
Trouble Defective communication (Abnormality in objective component system)
E03 DAJRKR (HST controller system)
Contents of trouble • The HST controller detected a communication error, but communication with the monitor panel is not available.
• Flashes the warning lamp and sounds the alarm buzzer.
Action of
• Limits the functions partly.
controller
• If cause of error disappears, system resets itself.
• The system may not work properly.
Problem that appears • Once the machine is stopped, its engine speed is limited to medium (half) speed.
on machine • Once the machine is stopped and started again, its travel speed is limited to 50%.
• The monitor panel does not display information.
• Though the HST controller outputs this code, the CAN communication is defective between the HST controllers and this code is
neither displayed on the monitor nor recorded.
KOMTRAX outputs it depending on the failed portion.
Related • [DAFRKR] is output when the monitor panel cannot recognize the HST controller.
information
• [DAFRMC] is output when the monitor panel cannot recognize the engine controller.
• [DB2RKR] is output when the HST controller cannot recognize the engine controller.
• [CA1633] is output when the engine controller cannot recognize the HST controller

Cause Standard value in normal state/Remarks on troubleshooting

★ Prepare with starting switch OFF, then carry out troubleshooting without turning
Short circuit in wiring starting switch.
1
harness CN-DT12 (male) Resistance
Between (3) and (10) 50 – 70 Ω
★ Prepare with starting switch OFF, then carry out troubleshooting without turning
starting switch.

Disconnection in wiring Wiring harness between CN-S04 (female) (1), (6) – CN-
115 (female) (46), – CN-ST2 (female) (32), – CN-G01 Resistance Max. 1 Ω
harness
2 (female) (8), – CN-119 (female) (A), CN-DT12 (male) (3)
(Disconnection or defective contact in
Possible causes and connector) Wiring harness between CN-S04 (female) (3) – CN-115
standard value in (female) (47), – CN-ST2 (female) (22), – CN-G01
normal state Resistance Max. 1 Ω
(female) (7), – CN-119 (female) (B), CN-DT12 (male)
(10)
★ Prepare with starting switch OFF, then carry out troubleshooting without turning
starting switch.
Wiring harness between CN-S04 (female)(1), (6) – CN-
Grounding fault in wiring 115 (female) (46), – CN-ST2 (female) (32), – CN-G01
Resistance Min. 1 M Ω
harness (female) (8), – CN-119 (female) (A), CN-DT12 (male) (3)
3
(Short circuit with ground and chassis ground
circuit)
Wiring harness between CN-S04 (female) (3) – CN-115
(female) (47), – CN-ST2 (female) (22), – CN-G01
Resistance Min. 1 M Ω
(female) (7), – CN-119 (female) (B), CN-DT12 (male)
(10) and chassis ground

D51EX/PX-22 40-243
TROUBLESHOOTING ERROR CODE [DAJRKR]

Cause Standard value in normal state/Remarks on troubleshooting

★ Prepare with starting switch OFF, then turn starting switch ON and carry out trou-
bleshooting.
Wiring harness between CN-S04 (female) (1), (6) – CN-
Short circuit with power 115 (female) (46), – CN-ST2 (female) (32), – CN-G01
Voltage Max. 1 V
4 supply line circuit in wiring harness (female) (8), – CN-119 (female) (A), CN-DT12 (male) (3)
(Contact with 24V circuit) and chassis ground
Wiring harness between CN-S04 (female) (3) – CN-115
(female) (47), – CN-ST2 (female) (22), – CN-G01
Voltage Max. 1 V
(female) (7), – CN-119 (female) (B), CN-DT12 (male)
Possible causes and (10) and chassis ground
standard value in
normal state ★ Prepare with starting switch OFF, then carry out troubleshooting without turning
starting switch.
5 Defective CAN end point resistance
CN-119 (female) Resistance
Between (A) and (B) 100 – 140 Ω
★ Prepare with starting switch OFF, then carry out troubleshooting without turning
Defective CAN end point resistance starting switch ON.
6
(Internal of monitor) CN-S04 (male) Resistance
Between (3) and (6) 100 – 140 Ω
Defective monitor panel or HST If causes 1 – 6 are not detected, monitor panel or HST controller may be defective.
7
controller (Since trouble is in system, troubleshooting cannot be carried out.)

Circuit diagram related to CAN communication

40-244 D51EX/PX-22
TROUBLESHOOTING ERROR CODE [DB2RKR]

ERROR CODE [DB2RKR]

CAN COMMUNICATION HST CONTROLLER DEFECTIVE

Action code Error code CAN communication (HST controller – Engine controller):
Trouble Defective communication (Abnormality in objective component system)
E03 DB2RKR (HST controller system)
Contents of trouble • Abnormality was detected in the communication between the HST controller and engine controller.
• Flashes the warning lamp and sounds the alarm buzzer.
Action of
• Limits the functions partly.
controller
• If cause of error disappears, system resets itself.
• The system may not work properly.
Problem that
• Engine speed is limited to medium (half) speed by modulated rate.
appears on machine
• Once the machine is stopped and started again, its travel speed is limited to 50%.
• Method of reproducing error code: Turn the starting switch ON
• [DAFRKR] is output when the monitor panel cannot recognize the HST controller.
Related
• [DAFRMC] is output when the monitor panel cannot recognize the engine controller.
information
• [DAJRKR] is output when the HST controller cannot recognize the monitor panel.
• [CA1633] is output when the engine controller cannot recognize the HST controller.

Cause Standard value in normal state/Remarks on troubleshooting

★ Prepare with starting switch OFF, then carry out troubleshooting without turning
Short circuit in wiring starting switch.
1
harness CN-PT12 (male) Resistance
Between (3) and (10) 50 – 70 Ω
★ Prepare with starting switch OFF, then carry out troubleshooting without
turning starting switch.

Disconnection in wiring Wiring harness between CN-S04 (female) (1), (6) – CN-
harness 115 (female) (46), – CN-ST2 (female) (32), – CN-G01 Resistance Max. 1 Ω
2
(Disconnection or defective contact in (female) (8), – CN-119 (female) (A), CN-DT12 (male) (3)
Possible causes and connector) Wiring harness between CN-S04 (female) (3) – CN-115
standard value in (female) (47), – CN-ST2 (female) (22), – CN-G01
normal state Resistance Max. 1 Ω
(female) (7), – CN-119 (female) (B), CN-DT12 (male)
(10)
★ Prepare with starting switch OFF, then carry out troubleshooting without
turning starting switch.
Wiring harness between CN-S04 (female) (1), (6) – CN-
Grounding fault in wiring 115 (female) (46), – CN-ST2 (female) (32), – CN-G01
harness Resistance Min. 1 M Ω
3 (female) (8), – CN-119 (female) (A), CN-DT12 (male) (3)
(Short circuit with ground and chassis ground
circuit)
Wiring harness between CN-S04 (female) (3) – CN-115
(female) (47), – CN-ST2 (female) (22), – CN-G01
Resistance Min. 1 M Ω
(female) (7), – CN-119 (female) (B), CN-DT12 (male)
(10) and chassis ground

D51EX/PX-22 40-245
TROUBLESHOOTING ERROR CODE [DB2RKR]

Cause Standard value in normal state/Remarks on troubleshooting

★ Prepare with starting switch OFF, then turn starting switch ON and carry out trou-
bleshooting.
Wiring harness between CN-S04 (female) (1), (6) – CN-
Short circuit with power 115 (female) (46), – CN-ST2 (female) (32), – CN-G01
Voltage Max. 1 V
4 supply line circuit in wiring harness (female) (8), – CN-119 (female) (A), CN-DT12 (male) (3)
(Contact with 24V circuit) and chassis ground
Wiring harness between CN-S04 (female) (3) – CN-115
(female) (47), – CN-ST2 (female) (22), – CN-G01
Voltage Max. 1 V
(female) (7), – CN-119 (female) (B), CN-DT12 (male)
Possible causes and (10) and chassis ground
standard value in
normal state ★ Prepare with starting switch OFF, then carry out troubleshooting without turning
starting switch.
5 Defective CAN end point resistance
CN-119 (female) Resistance
Between (A) and (B) 100 – 140 Ω
★ Prepare with starting switch OFF, then carry out troubleshooting without turning
Defective CAN end point resistance starting switch.
6
(Internal of monitor) CN-S04 (male) Resistance
Between (3) and (6) 100 – 140 Ω
Defective monitor panel or HST con- If causes 1 – 6 are not detected, monitor panel or HST controller may be defective.
4
troller (Since trouble is in system, troubleshooting cannot be carried out.)

Circuit diagram related to CAN communication

40-246 D51EX/PX-22
TROUBLESHOOTING ERROR CODE [DD12KA]

ERROR CODE [DD12KA]

SHIFT UP SWITCH DISCONNECTION

Action code Error code Shift up switch: Disconnection

Trouble
E02 DD12KA (HST controller system)

Contents of trouble • Both circuits in the shift up switch were turned off (set to OPEN) at the same time.
• Flashes the warning lamp and sounds the alarm buzzer.
Action of
• Recognizes that the shift up switch is not pressed.
controller
• Resets itself 3 seconds after if the detection conditions are unmeet.
Problem that appears
• Pressing the button does not operate the shift up.
on machine
• Both circuits of the switch are monitored, NO is used to detect the operation and NC is used to detect errors.
Related • Input state (ON/OFF) from the shift up switch can be checked with the monitoring function.
information (Controller: HST, Code: 40910 D-IN [0]: NO, [6]: NC)
• Method of reproducing error code: Turning on the starting switch and operating the shift up switch

Cause Standard value in normal state/Remarks on troubleshooting

★ Prepare with starting switch OFF, then carry out troubleshooting without turning
starting switch.

Defective shift up switch (Internal Shift up switch

1 CN-38 (Male)
disconnection) OFF (Release) ON (Press)
Between (2) and (3) Max. 1 Ω Min. 1 M Ω
Between (2) and (1) Min. 1 M Ω Max. 1 Ω
★ Prepare with starting switch OFF, then carry out troubleshooting without turning
starting switch.
Disconnection in wiring Wiring harness between CN-ST1 (female) (12) – CN-38
Resistance Max. 1 Ω
harness (female) (3)
2
(Disconnection or defective contact of Wiring harness between CN-ST1 (female) (23) – CN-38
connector) Resistance Max. 1 Ω
Possible causes and (female) (1)
standard value in Wiring harness between CN-ST1 (female) (4) – CN-38
normal state Resistance Max. 1 Ω
(female) (2)
★ Prepare with starting switch OFF, then turn starting switch ON and carry out
troubleshooting.
Short circuit with power supply line
Wiring harness between CN-ST1 (female) (12) – CN-38
3 circuit wiring harness Voltage Max. 1 V
(Contact with 24 V) (female) (3) and chassis ground
Wiring harness between CN-ST1 (female) (23) – CN-38
Voltage Max. 1 V
(female) (1) and chassis ground
★ Prepare with starting switch OFF, then turn starting switch ON and carry out
troubleshooting.
Shift up switch
4 Defective HST controller CN-ST1
OFF (Release) ON (Press)
Between (12) and (4) Max. 1 V 5 –11 V
Between (23) and (4) 5 – 11 V Max. 1 V

D51EX/PX-22 40-247
TROUBLESHOOTING ERROR CODE [DD12KA]
Circuit diagram related to the shift up switch and shift down switch

40-248 D51EX/PX-22
TROUBLESHOOTING ERROR CODE [DD12KB]
12
ERROR CODE [DD12KB]

SHIFT UP SWITCH SHORT CIRCUIT

Action code Error code Trouble Shift up switch: Short circuit

(HST controller system)
E02 DD12KB
Contents of trouble • Both circuits in the shift up switch were turned ON (set to CLOSE) at the same time.
• Flashes the warning lamp and sounds the alarm buzzer.
Action of
• Recognizes that the shift up switch is not pressed.
controller
• Even if cause of error disappears, system does not reset itself until starting switch is turned OFF.
Problem that appears
• Pressing the button does not operate the shift up.
on machine
• Both circuits of the switch are monitored, NO is used to detect the operation and NC is used to detect errors.
Related • Input state (ON/OFF) from the shift up switch can be checked with the monitoring function.
information (Controller: HST, Code: 40910 D-IN [0]: NO, [6]: NC)
• Method of reproducing error code: Turning on the starting switch and operating the shift up switch

Cause Standard value in normal state/Remarks on troubleshooting

★ Prepare with starting switch OFF, then carry out troubleshooting without turning
starting switch.

Defective shift up switch (Internal Shift up switch

1 CN-38 (Male)
short) OFF (Release) ON (Press)
Between (2) and (3) Max. 1Ω Min. 1 MΩ
Between (2) and (1) Min. 1 MΩ Max. 1 Ω
★ Prepare with starting switch OFF, then carry out troubleshooting without turning
Possible causes and Grounding fault in wiring starting switch.
standard value in harness Wiring harness between CN-ST1 (female) (12) – CN-38
normal state 2 Resistance Min. 1 MΩ
(Short circuit with ground (female) (3) and chassis ground
circuit)
Wiring harness between CN-ST1 (female) (23) – CN-38
Resistance Min. 1 MΩ
(female) (1) and chassis ground
★ Prepare with starting switch OFF, then turn starting switch ON and carry out
troubleshooting.
Shift up switch
3 Defective HST controller CN-ST1
OFF (Release) ON (Press)
Between (12) and (4) Max. 1 V 5 –11 V
Between (23) and (4) 5 – 11 V Max. 1 V

D51EX/PX-22 40-249
TROUBLESHOOTING ERROR CODE [DD12KB]
Circuit diagram related to the shift up switch and shift down switch

40-250 D51EX/PX-22
TROUBLESHOOTING ERROR CODE [DD13KA]
12
ERROR CODE [DD13KA]

SHIFT DOWN SWITCH DISCONNECTION

Action code Error code Shift down switch: Disconnection

Trouble
E02 DD13KA (HST controller system)

Contents of trouble • Both circuits in the shift down switch were turned OFF (set to OPEN) at the same time.
Action of • Flashes the warning lamp and sounds the alarm buzzer.
controller • Recognizes that the shift up switch is not pressed.
Problem that appears
• Pressing the button does not operate the shift down.
on machine
• Both circuits of the switch are monitored, NO is used to detect the operation and NC is used to detect errors.
Related • Input state (ON/OFF) from the shift down switch can be checked with the monitoring function.
information (Controller: HST, code: 40910 D-IN [4]: NC, [5]: NO)
• Method of reproducing error code: Turning on the starting switch and operating the shift down switch

Cause Standard value in normal state/Remarks on troubleshooting

★ Prepare with starting switch OFF, then carry out troubleshooting without turning
starting switch.

Defective shift down switch (Internal Shift down switch

1 CN-39 (female)
disconnection) OFF (Release) ON (Press)
Between (2) and (3) Max. 1Ω Min. 1 MΩ
Between (2) and (1) Min. 1 MΩ Max. 1 Ω
★ Prepare with starting switch OFF, then carry out troubleshooting without turning
starting switch.
Disconnection in wiring Wiring harness between CN-ST1 (female) (24) – CN-39
Resistance Max. 1 Ω
harness (male) (3)
2
(Disconnection or defective contact of Wiring harness between CN-ST1 (female) (18) – CN-39
connector) Resistance Max. 1 Ω
Possible causes and (male) (1)
standard value in Wiring harness between CN-ST1 (female) (4) – CN-39
normal state Resistance Max. 1 Ω
(male) (2)
★ Prepare with starting switch OFF, then turn starting switch ON and carry out
troubleshooting.
Short circuit with power supply line
Wiring harness between CN-ST1 (female) (24) – CN-39
3 circuit wiring harness Voltage Max. 1 V
(Contact with 24 V) (male) (3) and chassis ground
Wiring harness between CN-ST1 (female) (18) – CN-39
Voltage Max. 1 V
(male) (1) and chassis ground
★ Prepare with starting switch OFF, then turn starting switch ON and carry out trou-
bleshooting.
Shift down switch
4 Defective HST controller CN-ST1 (female)
OFF (Release) ON (Press)
Between (24) and (4) Max. 1 V 5 – 11 V
Between (18) and (4) 5 – 11 V Max. 1 V

D51EX/PX-22 40-251