Dtc C1551/25 Ig Power Supply Voltage Malfunction
Steering. Toyota Rav4. Aca30, 33, 38 Gsa33 Zsa30, 35
DESCRIPTION
WIRING DIAGRAM
INSPECTION PROCEDURE
READ VALUE USING INTELLIGENT TESTER (IG POWER SUPPLY)
INSPECT FUSE (ECU-IG1)
CHECK WIRE HARNESS (BATTERY - POWER STEERING ECU)
DTC C1551/25 IG Power Supply Voltage Malfunction |
DESCRIPTION
The power steering ECU distinguishes the ignition switch status as on (IG) or off through the IG power source circuit.DTC No.
| DTC Detection Condition
| Trouble Area
|
C1551/25
| IG power source circuit malfunction inside ECU
| - ECU-IG1 fuse
- IG power source circuit
- Power steering ECU
|
WIRING DIAGRAM
INSPECTION PROCEDURE
| 1.READ VALUE USING INTELLIGENT TESTER (IG POWER SUPPLY) |
Connect the intelligent tester to the DLC3.
Turn the ignition switch on (IG) and press the intelligent tester main switch ON.
Select the item "IG Power Supply" in the Data List and read the value displayed on the intelligent tester.
- Power steering ECU:
Tester Display
| Measurement Item/Range
| Normal Condition
| Specified Condition
|
IG Power Supply
| ECU power source voltage:
Min.: 0 V
Max.: 20.1531 V
| Ignition switch on (IG)
| 10 to 14 V
|
| | CHECK INTERMITTENT PROBLEMS |
|
|
Remove the ECU-IG1 fuse from the instrument panel junction block.
Measure the resistance of the fuse.
- Standard resistance:
- Below 1 Ω
| 3.CHECK WIRE HARNESS (BATTERY - POWER STEERING ECU) |
Disconnect the E21 and A2 ECU connectors.
Measure the voltage of the wire harness side connectors.
- Standard voltage:
Tester Connection
| Condition
| Specified Condition
|
E21-5 (IG) - A2-2 (PGND)
| Ignition switch on (IG)
| 10 to 14 V
|
| | REPAIR OR REPLACE HARNESS AND CONNECTOR |
|
|
| OK |
|
|
|
| REPLACE POWER STEERING ECU |
|
