B2603

STEERING COLUMN: POWER TILT AND POWER TELESCOPIC STEERING COLUMN SYSTEM: B2603: Tilt and Telescopic Manual Switch Circuit Malfunction

DTC B2603 - Tilt and Telescopic Manual Switch Circuit Malfunction

DESCRIPTION

Different voltage values are input to the multiplex tilt and telescopic ECU by operating the tilt and telescopic manual switch. The multiplex tilt and telescopic ECU then judges which motor and in which direction that motor should be moved based on the voltage value.





WIRING DIAGRAM





INSPECTION PROCEDURE

PROCEDURE

1. READ VALUE USING TECHSTREAM (TILT AND TELESCOPIC MANUAL SWITCH)





(a) Use the Data List to check if the tilt and telescopic manual switch is functioning properly.

Tilt & Telescopic





Result





C -- REPLACE MULTIPLEX TILT AND TELESCOPIC ECU
B -- REPLACE HEADLIGHT DIMMER SWITCH
A -- Continue to next step.
2. CHECK HARNESS AND CONNECTOR (MULTIPLEX TILT AND TELESCOPIC ECU - HEADLIGHT DIMMER SWITCH)





(a) Disconnect the J47 multiplex tilt and telescopic ECU connector.
(b) Disconnect the J10 headlight dimmer switch connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:





NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.
3. CHECK MULTIPLEX TILT AND TELESCOPIC ECU (VC TERMINAL VOLTAGE)





(a) Reconnect the J47 multiplex tilt and telescopic ECU connector.
(b) Measure the voltage according to the value(s) in the table below.
Standard Voltage:





NG -- REPLACE MULTIPLEX TILT AND TELESCOPIC ECU
OK -- Continue to next step.
4. INSPECT HEADLIGHT DIMMER SWITCH (TILT AND TELESCOPIC MANUAL SWITCH)





(a) Disconnect the J10 headlight dimmer switch connector.
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:





NG -- REPLACE HEADLIGHT DIMMER SWITCH
OK -- REPLACE MULTIPLEX TILT AND TELESCOPIC ECU