B2602

STEERING COLUMN: POWER TILT AND POWER TELESCOPIC STEERING COLUMN SYSTEM: B2602: Key Unlock Warning Switch Circuit Malfunction

DTC B2602 - Key Unlock Warning Switch Circuit Malfunction

DTC B2606 - Key Code Confirm Signal Malfunction

DESCRIPTION

A key code confirmation signal (ON or OFF) is sent from the main body ECU to the multiplex tilt and telescopic ECU via the communication bus.
The multiplex tilt and telescopic ECU uses this signal to operate the auto away/return function.






WIRING DIAGRAM





INSPECTION PROCEDURE

PROCEDURE

1. CHECK OTHER DTC OUTPUT
HINT:
The power tilt and power telescopic steering column system uses the CAN communication system, so check its diagnostic system before proceeding to troubleshooting.
(a) Check if DTC B2621 is output.

Result





HINT:
- If DTC B2621 is output, perform troubleshooting for B2621 first.
- DTC B2621 indicates a communication interruption for the power tilt and power telescopic steering column system.

B -- REPAIR CIRCUIT INDICATED BY OUTPUT CODE
A -- Continue to next step.
2. READ VALUE USING TECHSTREAM (COMMUNICATION STATE OF ENGINE SWITCH AND KEY CODE)
(a) Use the Data List to check if the communication of the key code and the engine switch are functioning properly.

Tilt & Telescopic





OK:
"ON" is displayed.
NG -- CHECK SMART ACCESS SYSTEM WITH PUSH-BUTTON START (FOR START FUNCTION)
OK -- Continue to next step.
3. RECONFIRM DTC
(a) Clear the DTCs Power Tilt and Power Telescopic Steering Column System.
(b) Check for DTCs Power Tilt and Power Telescopic Steering Column System.
OK:
DTC B2602 and/or B2606 is not output.
NG -- REPLACE MULTIPLEX TILT AND TELESCOPIC ECU
OK -- USE SIMULATION METHOD TO CHECK