U0105

POWER STEERING: ELECTRONIC POWER STEERING SYSTEM:

DTC U0105 - Lost Communication with ECM


DESCRIPTION

The power steering ECU assembly receives signals from the ECM, skid control ECU, and steering control ECU via CAN communication.





HINT:
- When two or more DTCs starting with "U" are output simultaneously, inspect the connectors and wire harness of each ECU.
- If the power steering ECU assembly detects DTC U0121 only, it adjusts the amount of power assistance for a speed of 100 km/h (62 mph) and continues system control.

INSPECTION PROCEDURE

PROCEDURE

1. CHECK WIRE HARNESS (+B1, +B, E)
(a) Turn the engine switch off.
(b) Disconnect the ECM connectors (E4) and (A5).





(c) Measure the resistance according to the value(s) in the table below.
Standard resistance:





(d) Measure the voltage according to the value(s) in the table below.
Standard voltage:






NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- REPLACE ECM