POWER ASSISTED SYSTEM (POWER STEERING) (DIAGNOSTICS) > Diagnostic Procedure with Diagnostic Trouble Code (DTC)

DTC 54 POWER SUPPLY RELAY FAILURE

TROUBLE SYMPTOM:

The steering wheel operation feels heavy.

WIRING DIAGRAM:

• Gasoline engine model

• Diesel engine model

STEPCHECKYESNO

1.CHECK WIRING HARNESS.

1) Disconnect the connector from the power steering control module.

2) Turn the ignition switch to ON.

3) Using a tester and test harness, check the voltage between terminals.

Connector & terminal

(B452) No. 2 (+) — Chassis ground (−):

Is the voltage 12 V or more?

Repair the harness and connector.

2.CHECK GROUND CIRCUIT.

1) Turn the ignition switch to OFF.

2) Using a tester and test harness, check the resistance between terminals.

Connector & terminal

(B452) No. 1 — Chassis ground:

Is the resistance less than 1 Ω?

Check for poor contact of terminals in the power steering control module, and if there are no malfunctions, replace the power steering control module.

Repair the ground circuit.