B172C

Description

- Soft top control unit transmits roof position signal to BOSE amp. and TEL adapter unit (Without NAVI).
- BOSE amp. uses this signal for sound equalizer automatic switching function. Bose Audio (BOSE audio without navigation) or System Description (BOSE audio with navigation).
- TEL adapter unit (Without NAVI) uses this signal for voice recognition function. Reading and Clearing Diagnostic Trouble Codes.



DTC Logic


DTC DETECTION LOGIC

NOTE:
If two or more DTCs are detected, Related Tests, Information And Procedures, and determine trouble diagnosis order.






DTC CONFIRMATION PROCEDURE


1. PERFORM DTC CONFIRMATION PROCEDURE

1.Start engine.
2.Operate soft top to fully open and fully close.
3.Select "Self Diagnostic Result" mode of "CONVERTIBLE ROOF" using CONSULT.
4.Check DTC.
Is DTC detected?
YES- Go to B171C.
NO- INSPECTION END


Diagnosis Procedure


1. CHECK ROOF POSITION SIGNAL CIRCUIT-I

1.Turn ignition switch OFF.
2.Disconnect soft top control unit harness connector.
3.Turn ignition switch ON.
4.Check voltage between soft top control unit harness connector and ground.





Is the inspection result normal?
YES- GO TO 5.
NO- GO TO 2.

2. CHECK ROOF POSITION SIGNAL CIRCUIT-II

1.Turn ignition switch OFF.
2.Disconnect BOSE amp. and TEL adapter unit (Without NAVI) harness connector.
3.Check continuity between soft top control unit harness connector and battery.





Is the inspection result normal?
YES- GO TO 3.
NO- Repair short to power in harness or connectors.

3. CHECK BOSE AMP.

Check BOSE amp. Without Navigation (BOSE audio without navigation) or With Navigation
(BOSE audio with navigation).
Is the inspection result normal?
YES-I- BOSE audio without navigation: GO TO 4.
YES-II- BOSE audio with navigation: GO TO 6.
NO- Replace BOSE amp. Without Navigation (BOSE audio without navigation) or With Navigation (BOSE audio with navigation).

4. CHECK TEL ADAPTER UNIT

Check TEL adapter unit. Without Navigation.
Is the inspection result normal?
YES- GO TO 6.
NO- Replace TEL adapter unit. Service and Repair.

5. REPLACE SOFT TOP CONTROL UNIT

Replace soft top control unit. Removal And Installation.
Is the inspection result normal?
YES- INSPECTION END
NO- GO TO 6.

6. CHECK INTERMITTENT INCIDENT

Intermittent Incident Regular Grade.
- INSPECTION END