P112 HYBRID VEHICLE CONTROL: HYBRID CONTROL SYSTEM: P3102-524: ...
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Last Modified: 7-22-2008 5.1 C From: 200808
Model Year: 2009 Model: Prius Doc ID: RM000001QOQ006X
Title: P112 HYBRID VEHICLE CONTROL: HYBRID CONTROL SYSTEM: P3102-524: Transmission
Control ECU Malfunction (2009 Prius)
P3102-
DTC Transmission Control ECU Malfunction
524
P3102-
DTC Transmission Control ECU Malfunction
525
P3102-
DTC Transmission Control ECU Malfunction
581
P3102-
DTC Transmission Control ECU Malfunction
582
P3102-
DTC Transmission Control ECU Malfunction
597
P3102-
DTC Transmission Control ECU Malfunction
598
P3102-
DTC Transmission Control ECU Malfunction
599
DESCRIPTION
When a signal is input from the P position switch or selector lever, the HV control ECU transmits a P
position control (PCON) signal to the transmission control ECU assembly. Based on this signal, the
transmission control ECU assembly actuates the shift control actuator in order to mechanically lock or
unlock the counter drive gear in the HV transaxle assembly. If the shift control actuator is in the P
position, the transmission control ECU assembly transmits a P position (PPOS) signal to the HV control
ECU.
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DTC INF DTC DETECTION CONDITION TROUBLE AREA
NO. CODE
Wire harness or connector
BEAN communication problem of transmission Transmission control ECU
P3102 524 assembly
control ECU assembly
HV control ECU
Power source control ECU
Wire harness or connector
Transmission control ECU IG OFF command Transmission control ECU
P3102 525 assembly
malfunction
HV control ECU
Power source control ECU
Wire harness or connector
Transmission control ECU
P3102 581 Transmission control ECU malfunction assembly
HV control ECU
Power source control ECU
Wire harness or connector
Transmission control ECU
P3102 582 P position (PPOS) signal is logically inconsistent assembly
HV control ECU
Power source control ECU
Wire harness or connector
Transmission control ECU
P3102 597 GND short in P position (PPOS) signal circuit assembly
HV control ECU
Power source control ECU
Wire harness or connector
Transmission control ECU
P3102 598 +B short in P position (PPOS) signal circuit assembly
HV control ECU
Power source control ECU
Wire harness or connector
P position (PPOS) signal malfunction (output Transmission control ECU
P3102 599 assembly
pulse is abnormal)
HV control ECU
Power source control ECU
WIRING DIAGRAM
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INSPECTION PROCEDURE
PROCEDURE
CHECK HARNESS AND CONNECTOR (HYBRID VEHICLE CONTROL ECU -
1. TRANSMISSION CONTROL ECU ASSEMBLY AND POWER SOURCE CONTROL
ECU)
(a) Disconnect the H17 HV control ECU connector.
(b) Disconnect the T4 transmission control ECU
assembly connector.
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(c) Disconnect the P6 power source control ECU
connector.
(d) Measure the voltage between the terminals of the HV control ECU connector and body
ground.
Standard voltage:
TESTER CONNECTION SPECIFIED CONDITION
PCON (H17-9) - Body ground Below 1 V
PPOS (H17-10) - Body ground Below 1 V
(e) Measure the resistance between the wire harness side connectors.
Standard resistance (Check for open):
Standard resistance (Check for short)
TESTER CONNECTION SPECIFIED CONDITION
PCON (H17-9) - PCON (T4-7) Below 1 Ω
PPOS (H17-10) - PPOS (T4-8) Below 1 Ω
PPOS (H17-10) - P (P6-5) Below 1 Ω
TESTER CONNECTION SPECIFIED CONDITION
PCON (H17-9) or PCON (T4-7) - Body ground 10 kΩ or higher
PPOS (H17-10) or PPOS (T4-8) - Body ground 10 kΩ or higher
PPOS (H17-10) or P (P6-5) - Body ground 10 kΩ or higher
(f) Reconnect the power source control ECU connector.
(g) Reconnect the transmission control ECU assembly connector.
(h) Reconnect the HV control ECU connector.
REPAIR OR REPLACE HARNESS OR
NG CONNECTOR
OK
CHECK HARNESS AND CONNECTOR (CHECK FOR +B SHORT IN WIRE
2.
HARNESS)
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(a) Inspect the HV control ECU using an oscilloscope.
(b) Turn the power switch ON (IG).
(c) Check the waveforms of the voltages between the
terminals PCON (H17-9) and GND1 (H14-1), and
terminals PPOS (H17-10) and GND1 (H14-1), of the
HV control ECU connectors, in order to check for +B
short in the signal lines PCON and PPOS.
OK:
No +B short in either PCON or PPOS signal lines.
If there is +B short in the signal line, the output
voltage is constantly between 9 V and 14 V.
If the signal lines are normal, the waveforms are
displayed as shown in the diagram.
REPAIR OR REPLACE HARNESS OR
NG CONNECTOR
OK
3. READ OUTPUT DTC (TRANSMISSION CONTROL)
(a) Connect the Techstream to the DLC3.
(b) Turn the power switch ON (IG).
(c) Enter the following menus: Chassis / Transmission Control / Trouble Codes.
(d) Check if DTCs are output.
Result:
DTCs are output
YES GO TO RELEVANT DTC CHART
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REPLACE HV CONTROL ECU,
NO TRANSMISSION ECU AND POWER
SOURCE CONTROL ECU
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