U0131-433

CAN COMMUNICATION: CAN COMMUNICATION SYSTEM: U0131-433,U0131-434: Lost Communication with Power Steering Control Module

DTC U0131-433 - Lost Communication with Power Steering Control Module

DTC U0131-434 - Lost Communication with Power Steering Control Module

DESCRIPTION

If 2 or more DTCs are output during the DTC check, one side of the CAN branch wire may be open. (One side of the CANH [branch wire] /CANL [branch wire] of the ECU and/or sensor is open.)

WIRING DIAGRAM

INSPECTION PROCEDURE

PROCEDURE

1. CHECK FOR DTC
(a) Connect the Techstream to the DLC3.
(b) Turn the power switch ON (IG).
(c) Clear the DTC.
(d) Check for DTC.
HINT: When DTCs other than U0131 are output, inspect and repair the trouble areas indicated by those DTCs first.

Result

B -- GO TO ELECTRONIC POWER STEERING SYSTEM
A -- Continue to next step.
2. CHECK CAN BUS LINE FOR DISCONNECTION (POWER STEERING ECU BRANCH WIRE)

(a) Disconnect the A23 power steering ECU connector.
(b) Measure the resistance of the wire harness side connector.
Standard resistance:

NG -- REPAIR OR REPLACE POWER STEERING ECU BRANCH WIRE OR CONNECTOR (CANH, CANL)
OK -- Continue to next step.
3. CHECK WIRE HARNESS (POWER STEERING ECU - BATTERY AND BODY GROUND)

(a) Disconnect the A23 power steering ECU connector.
(b) Measure the resistance of the wire harness side connector.
Standard resistance:

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