DTC C1551/51 IG Power Supply Voltage Malfunction
DESCRIPTIONThe power steering ECU distinguishes the ignition switch status as on or off through the IG power source circuit.
|DTC No.||DTC Detection Condition||Trouble Area|
|C1551/51||Open or short in IG power source circuit with ignition switch on.|
|1.READ VALUE USING TECHSTREAM|
Connect a Techstream to the DLC3.
Turn the ignition switch to ON.
Turn the Techstream on.
Enter the following menus: Chassis / EMPS / Data List.
Select the item "IG Power Supply" in the Data List and read the value displayed on the Techstream.
|Tester Display||Measurement Item/Range||Normal Condition||Diagnostic Note|
|IG Power Supply||ECU power source voltage: Minimum: 0.0000 V, Maximum: 20.1531 V||11 to 14 V: Ignition switch ON||-|
- The normal condition value is displayed on the Techstream.
|2.INSPECT FUSE (ECU-IG)|
Remove the ECU-IG fuse from the instrument panel J/B.
Check the resistance of the fuse.
- Standard resistance:
- Below 1 Ω
|3.CHECK HARNESS AND CONNECTOR (POWER STEERING ECU - BODY GROUND)|
Disconnect the connectors from the power steering ECU.
Measure the voltage and the resistance.
Tester Connection Condition Specified Condition IG (D31-6) - Body ground Ignition switch on 11 to 14 V PGND (A19-2) - Body ground Always Below 1 Ω