Dtc C1552 Pig Power Supply Voltage Malfunction
DESCRIPTION
WIRING DIAGRAM
INSPECTION PROCEDURE
INSPECT FUSE (EPS FUSE)
CHECK HARNESS AND CONNECTOR (BATTERY - POWER STEERING ECU - BODY GROUND)
DTC C1552 PIG Power Supply Voltage Malfunction |
DTC C1554 Power Supply Relay Failure |
DESCRIPTION
When a problem occurs in the system, the power source relay circuit and the motor relay circuit are shut off to stop the power assist. The ECU must be replaced when there is a problem with the relays because the relays are built into the ECU.DTC No.
| DTC Detection Condition
| Trouble Area
|
C1552
| PIG power source circuit malfunction
| - EPS fuse
- PIG power source circuit
- Power steering ECU
|
C1554
| Power source relay circuit malfunction
| - EPS fuse
- PIG power source circuit
- Power steering ECU
|
WIRING DIAGRAM
INSPECTION PROCEDURE
- NOTICE:
- If the power steering ECU has been replaced with a new one, perform the assist map writing and the torque sensor zero point calibration (COROLLA_ZRE142 RM00000275305DX.html).
| 1.INSPECT FUSE (EPS FUSE) |
Remove the EPS fuse from the engine room relay block.
Measure the resistance according to the value(s) in the table below.
- Standard Resistance:
Fuse
| Condition
| Specified Condition
|
EPS fuse
| Always
| Below 1 Ω
|
| 2.CHECK HARNESS AND CONNECTOR (BATTERY - POWER STEERING ECU - BODY GROUND) |
Disconnect the connector from the power steering ECU.
Measure the voltage according to the value(s) in the table below.
- Standard Voltage:
Tester Connection
| Switch Condition
| Specified Condition
|
A75-1 (PIG) - Body ground
| Ignition switch on (IG)
| 11 to 14 V
|
Measure the resistance according to the value(s) in the table below.
- Standard Resistance:
Tester Connection
| Condition
| Specified Condition
|
A75-2 (PGND) - Body ground
| Always
| Below 1 Ω
|
| | REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
|
