CONTROLLERS
Outline ........................................................................................................ 4 1
Main Functions ........................................................................................ 4 2
Service Tool Functions .......................................................................... 4 3
Input/Output Monitor .................................................................................. 4 3
VCM ....................................................................................................... 4 3
Error Codes and Troubleshootings ............................................................ 4 5
Locations of Sensors and Switches .................................................. 4 12 4
Others (Option) ......................................................................................... 4 14
CONTROLLERS
Outline
VCM and ECM control the vehicle and engine.
Conrollers are located as shown below.
Meter panel
VCM
(Vehicle control module)
ECM
(Engine control module)
209717
4-1
CONTROLLERS
Main Functions
Meter panel, VCM and ECM are connected each other and
their mutual communication works as a distributed control VCM
system to control the truck.
METER
PANEL
ECM
Main functions of each controller are as follows:
Meter Panel
Located below the steering wheel and displays error codes.
Refer to GROUP 3 ELECTRICAL SYSTEM for other
functions.
VCM (Vehicle Control Module)
Located at the right side of the body and controls the
vehicle overall.
ECM (Engine Control Module)
Located at the left side of the body and controls the engine.
Refer to Engine Service Manual for details.
4-2
CONTROLLERS
Service Tool Functions
Input/Output Monitor
Monitors input and output of sensors and switches.
VCM
1. VCM-1 I/O Monitor: Mast control
GSE VCM1 > VCM1
Unload Sol ON/OFF, Feedback [Hex,mA]
Input/Output monitor
LiftLock Sol ON/OFF, Feedback [Hex,mA]
TiltLock ON/OFF, Feedback [Hex,mA] Unload Sol ON 938[mA]
LiftLock Sol OFF 0[mA]
TiltLock Sol OFF 0[mA]
Lowering Speed SW ON/OFF
Lowering Speed SW ON
Lift Operation SW ON/OFF
Lift Operation SW ON
Mast High SW ON/OFF Tilt Operation SW OFF
Mast Hight SW OFF
Snow Mode SW ON/OFF
Snow Mode SW ON
Tilt Auto-stop SW ON/OFF Tilt Auto-stop SW OFF
Tilt Operation SW ON/OFF
TiltAngle +1.2[V]
Tilt Angle [Hex, V]
<< [1][2][3][4][5] >>
View Tool
2. VCM-1 I/O Monitor: Engine and T/M control
Speed limit SW Outside/Inside
Direction lever F ON/OFF
Direction lever N ON/OFF
Direction lever R ON/OFF
Direction lever [Hex]
Accel SW ON/OFF
T/M sig N ON/OFF
T/M sol F ON/OFF
T/M sol R ON/OFF
T/M sol cur [Hex,mA]
Speed sensor [Hex,Hz,km/h]
Speed sensor err [Hex,V]
Note: Hex denotes hexadecimal digit.
4-3
CONTROLLERS
3. VCM-1 I/O Monitor: Other control 1
GSE VCM1 > VCM1
Oil press MAIN [Hex,MPa]
Oil press LIFT [Hex,MPa] Input/Output monitor
Oil press MAIN 18.5[MPa]
Oil press LIFT 14.8[MPa]
Weight 0 set SW ON/OFF
Enter SW ON/OFF Weight 0 set SW OFF
Enter SW OFF
Next SW ON/OFF Next SW OFF
Auto light sig ON
Auto light sig ON/OFF Auto light OUT ON
Auto light OUT ON/OFF
Seat SW ON
Seat SW timer ON
Seatbelt SW ON
Seat SW ON/OFF
Seat SW timer ON/OFF << [1][2][3][4][5] >>
Seatbelt SW ON/OFF View Tool
4. VCM-1 I/O Monitor: Other control 2
Park brake alarm ON/OFF
Over load alarm ON/OFF
Over speed alarm ON/OFF
Coolant low SW ON/OFF
Air cleaner SW ON/OFF
T/M warning SW ON/OFF
Fuel warning SW ON/OFF
Park brake SW ON/OFF
AUX in1 ON/OFF
AUX in2 ON/OFF
AUX out1 ON/OFF
AUX out2 ON/OFF
AUX out3 ON/OFF
4-4
CONTROLLERS
Error Codes and Troubleshootings
Error Code Display
All the error codes detected by VCM are displayed.
Troubleshooting
Tapping a displayed error code or error name reads the text file
(***.txt, which can be edited with a Windows application)
corresponding to the error code and displays the troubleshooting
screen specific to the error code. If one screen cannot
accommodate all data, the screen can be scrolled. The screen
specifications are shown below. Table in the following pages lists
the probable causes and check points for error codes.
Error code F34 (speed sensor error)
Estimated cause GSE VCM1 > VCM1
1. Connector contact error Troubleshooting
2. Harness error
F34 Speed sensor err
3. Speed sensor error
Estimated cause
4. Controller error 1.Connector contact bad
Check items 2.Harness bad
3.Speed sensor bad
1. Connector connection 4.Controller bad
2. Harness continuity
Check item
3. Sensor continuity 1.Connector connection check
2.Harness connection check
3.Sensor connection check
View Tool
4-5
CONTROLLERS
Error Codes and Troubleshootings are shown below.
Refer to Locations of Sensors and Switches on later pages.
Err
Description Probable cause Check point
code
F01 Memory err 1. Controller bad
F02 Battery voltage fault 1. Connector contact bad 1. Connector connection check
2. Harness bad 2. Harness connection check
3. Controller bad
F03 VCM communication err 1. Connector contact bad 1. Connector connection check
2. Harness bad 2. Harness connection check
3. VCM Controller bad 3. Communication line check
4. Controller bad
F07 MP communication err 1. Connector contact bad 1. Connector connection check
2. Harness bad 2. Harness connection check
3. Meter panel bad 3. Communication line check
4. Controller bad
F14 Att3 lever neutral 1. Connector contact bad 1. Connector connection check
2. Harness bad 2. Harness connection check
3. Att3 lever bad 3. Lever connection check
4. Controller bad
F16 Shift lever fault 1. Connector contact bad 1. Connector connection check
2. Harness bad 2. Harness connection check
3. Shift lever bad 3. Shift lever check
4. Controller bad
4-6
CONTROLLERS
Err
Description Probable cause Check point
code
F17 Speed err 1. Connector contact bad 1. Connector connection check
2. Harness bad 2. Harness connection check
3. Speed sensor bad 3. Sensor connection check
4. Controller bad
F32 Lift oil prs err 1. Connector contact bad 1. Connector connection check
2. Harness bad 2. Harness connection check
3. Lift oil prs sensor bad 3. Sensor connection check
4. Controller bad
F34 Speed sensor err 1. Connector contact bad 1. Connector connection check
2. Harness bad 2. Harness connection check
3. Speed sensor bad 3. Sensor connection check
4. Controller bad
F36 Wheel sensor err 1. Connector contact bad 1. Connector connection check
2. Harness bad 2. Harness connection check
3. Wheel sensor bad 3. Sensor connection check
4. Joint and link bad 4. Joint and link check
5. Controller bad
4-7
CONTROLLERS
Err
Description Probable cause Check point
code
F38 Tilt sensor err 1. Connector contact bad 1. Link comes and damage check
2. Connector connection check
2. Harness bad 3. Harness connection check
3. Tilt sensor bad 4. Sensor connection check
4. Controller bad
F40 Steering fault 1. Connector contact bad 1. Connector connection check
2. Harness bad 2. Harness connection check
3. Wheel sensor bad 3. Sensor connection check
4. Controller bad
F75 Unload sol err 1. Connector contact bad 1. Connector connection check
2. Diode bad 2. Diode connection check
3. Harness bad 3. Harness connection check
4. Unload sol bad 4. Unload sol connection check
5. Controller bad
F77 Liftlock sol err 1. Connector contact bad 1. Connector connection check
2. Diode bad 2. Diode connection check
3. Harness bad 3. Harness connection check
4. Liftlock sol bad 4. Liftlock sol connection check
5. Controller bad
4-8
CONTROLLERS
Err
Description Probable cause Check point
code
F79 Unload sol leak 1. Connector contact bad 1. Connector connection check
2. Diode bad 2. Diode connection check
3. Harness bad 3. Harness connection check
4. Unload sol bad 4. Unload sol connection check
5. Controller bad
F80 Knob pos sol err 1. Connector contact bad 1. Connector connection check
2. Diode bad 2. Diode connection chec
3. Harness bad 3. Harness connection check
4. Knob pos sol bad 4. Knob pos sol connection check
5. Controller bad
F82 Tiltlock sol err 1. Connector contact bad 1. Connector connection check
2. Diode bad 2. Diode connection check
3. Harness bad 3. Harness connection check
4. Tiltlock sol bad 4. Tiltlock sol connection check
5. Controller bad
F84 Knob pos sol leak 1. Connector contact bad 1. Connector connection check
2. Diode bad 2. Diode connection check
3. Harness bad 3. Harness connection check
4. Knob pos sol bad 4. Knob pos sol connection check
5. Controller bad
4-9
CONTROLLERS
Err
Description Probable cause Check point
code
F85 T/M FW sol err 1. Connector contact bad 1. Connector connection check
2. Diode bad 2. Diode connection check
3. Harness bad 3. Harness connection check
4. T/M FW sol bad 4. T/M FW sol connection check
5. Controller bad
F87 T/M BW sol err 1. Connector contact bad 1. Connector connection check
2. Diode bad 2. Diode connection check
3. Harness bad 3. Harness connection check
4. T/M BW sol bad 4. T/M BW sol connection check
5. Controller bad
F89 T/M sol leak 1. Connector contact bad 1. Connector connection check
2. Diode bad 2. Diode connection check
3. Harness bad 3. Harness connection check
4. T/M sol bad 4. T/M sol connection check
5. Controller bad
Error Codes and Explanation
Contact your Cat lift truck dealer when the error code is displayed.
Error Explanation Error Explanation
Code Code
E03 VCM communication error E21 Air flow meter error signal
E04 ECM communication error E22 Water temperature sensor error signal
E05 DCM communication error E23 Throttle sensor error signal
E06 HST communication error E24 Accelerator sensor error signal
E07 MP communication error E25 O2 sensor error signal
E08 TMS communication error E26 O2 sensor heater error signal
4-10
CONTROLLERS
Error Explanation Error Explanation
Code Code
E27 POS sensor error signal F32 Lift oil pressure sensor error
E28 PHASE sensor error signal F34 Speed sensor error
E29 Self shutdown system diagnostic result error signal F36 Tire angle sensor error
E30 ECCS C/U error signal F38 Tilt angle sensor error
E31 Electronic control throttle control error signal F40 Steering error
E32 Overheat signal (STEP1) F50 Lift up solenoid error
E33 Overheat signal (STEP2) F52 Lift down solenoid error
E34 Spark system error signal F54 Lift solenoid leak
E35 LPG F/INJ disconnection diagnostic result signal F55 Tilt forward solenoid error
E36 LPG fuel pressure sensor diagnostic result signal F57 Tilt backward solenoid error
E37 LPG fuel temperature sensor diagnostic result signal F59 Tilt solenoid leak
E38 LPG vaporizer diagnostic result signal F60 Attach-1A solenoid error
E39 Mast-high SW diagnostic result signal F62 Attach-1B solenoid error
E40 Oil pressure sensor diagnostic result signal F64 Attach-1 solenoid leak
E41 Stop lamp SW error signal F65 Attach-2A solenoid error
F67 Attach-2B solenoid error
F69 Attach-2 solenoid leak
F70 Attach-3A solenoid error
F01 Memory check error F72 Attach-3B solenoid error
F02 Battery voltage error F74 Attach-3 solenoid leak
F03 VCM communication error F75 Unload solenoid error
F04 ECM communication error F77 Lift lock solenoid error
F05 DCM communication error F79 Unload solenoid leak
F06 HST communication error F80 Knob position solenoid error
F07 MP communication error F82 Tilt lock solenoid error
F08 TMS communication error F84 Knob position solenoid leak
F10 Lift lever neutral error F85 T/M forward solenoid error
F11 Tilt lever neutral error F87 T/M backward solenoid error
F12 Attach-1 lever neutral error F89 T/M solenoid leak
F13 Attach-2 lever neutral error
F14 Attach-3 lever neutral error
F16 Shift lever error
F17 Speed error P03 VCM communication error
F20 Lift lever error P04 ECM communication error
F22 Tilt lever error P05 DCM communication error
F24 Attach-1 lever error P06 HST communication error
F26 Attach-2 lever error P07 MP communication error
F28 Attach-3 lever error P08 TMS communication error
F30 Main oil pressure sensor error P22 Shift lever error signal
4-11
CONTROLLERS
Locations of Sensors and Switches
VCM
(Body Right Side)
210115
Shift lever
Shift lever
connector
Vehicle speed sensor
Shift lever
(for Powershift Truck) Transmission
(Right side)
209720 209721
4-12
CONTROLLERS
Lift lever connector
Unloading solenoid connector
Lift lock solenoid connector
Control valve
210116
T/M forward/backward solenoid
Transmission
210117
4-13
CONTROLLERS
Others (Option)
Sensor Location
Tilt Angle Sensor and Connector
(For tilt automatic leveling option) Tilt Cylinder Pin
Tilt Lock Solenoid and Connetor
(For tilt automatic leveling option) Between Control Valve and Tilt Cylinder
Lift Pressure Sensor and Connector Between Control Valve and Lift Cylinder
4-14
