Power Steering ECU Communication Stop Mode

NETWORKING: CAN COMMUNICATION SYSTEM: Power Steering ECU Communication Stop Mode

Power Steering ECU Communication Stop Mode

DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

NOTICE:
- Turn the ignition switch off before measuring the resistance of CAN bus main wires and the CAN bus branch wires.
- After the ignition switch is turned off, check that the key reminder warning system and light reminder warning system are not operation.
- Before measuring the resistance, leave the vehicle as is for at least 1 minute and do not operate the ignition switch, any other switches or the doors. If any doors need to be opened in order to check connectors, open the doors and leave them open.

HINT:
- Operating the ignition switch, any other switches or a door triggers related ECU and sensor communication on the CAN, This communication will cause the resistance value to change.
- Even after DTCs are cleared, if a DTC is stored again after driving the vehicle for a while, the malfunction may be occurring due to vibration of the vehicle. In such a case, wiggling the ECUs or wire harness while performing the inspection below will help determine the cause of the malfunction.

PROCEDURE

1. CHECK CAN BUS WIRE FOR DISCONNECTION (POWER STEERING ECU BRANCH WIRE)

(a) Turn the ignition switch off.

(b) Disconnect the power steering ECU connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard resistance:

NG -- REPAIR OR REPLACE CAN BRANCH WIRE OR CONNECTOR (POWER STEERING ECU BRANCH WIRE)
OK -- Continue to next step.

2. CHECK WIRE HARNESS (POWER STEERING ECU - BATTERY AND BODY GROUND)

(a) Disconnect the power steering ECU connectors.
(b) Measure the resistance according to the value(s) in the table below.
Standard resistance:

NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- REPLACE POWER STEERING ECU