DTC C1552 PIG Power Supply Voltage Malfunction
DTC C1554 Power Supply Relay Failure
DESCRIPTIONWhen 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 each relay is built into the ECU.
|DTC No.||DTC Detection Condition||Trouble Area|
|C1552||PIG power source circuit malfunction|
|C1554||Power source relay circuit malfunction|
- If the power steering ECU assembly has been replaced, perform the torque sensor zero point calibration and assist map writing (Click here).
- Inspect the fuses for circuits related to this system before performing the following inspection procedure.
|1.READ VALUE USING TECHSTREAM (PIG POWER SUPPLY)|
Turn the ignition switch off.
Connect the 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 PIG Power Supply in the Data List and read the value displayed on the Techstream.
EMPS Tester Display Measurement Item/Range Normal Condition Diagnostic Note PIG Power Supply Power source voltage to activate motor/
Min.: 0.0000 V
Max.: 20.1531 V
11 to 14 V Ignition switch ON
|2.CHECK HARNESS AND CONNECTOR (POWER STEERING ECU ASSEMBLY - BODY GROUND)|
Disconnect the power steering ECU assembly connector.
Measure the voltage according to the value(s) in the table below.
- Standard Voltage:
Tester Connection Switch Condition Specified Condition A68-1 (PIG) - Body ground Ignition switch ON 11 to 14 V
Measure the resistance according to the value(s) in the table below.
- Standard Resistance:
Tester Connection Condition Specified Condition A68-2 (PGND) - Body ground Always Below 1 Ω Text in Illustration *a Rear view of wire harness connector
(to Power Steering ECU Assembly)