B172B

Description

Retractable hard top control unit transmits retractable hard top open and close states to audio volume control unit. Audio volume control unit automatically switches equalizer according to retractable hard top open or close state that is received.


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 retractable hard top to fully open and fully close.
3.Check DTC.
Is DTC detected?
YES- Go to B171C.
NO- INSPECTION END


Diagnosis Procedure


1. CHECK ROOF POSITION SIGNAL CIRCUIT

1.Turn ignition switch OFF.
2.Disconnect retractable hard top control unit harness connector and BOSE AMP. (with NAVI) or tel adapter unit (without NAVI) harness connector.
3.Check voltage between retractable hard top control unit harness connector and ground.





Is the inspection result normal?
YES-1- BOSE AMP. (with NAVI): GO TO 2.
YES-2- Tel adapter unit (without): GO TO 3.
NO- Repair or replace harness or connectors.

2. CHECK BOSE AMP.

Check BOSE AMP. With Navigation.
Is the inspection result normal?
YES- GO TO 4.
NO- Replace BOSE AMP.

3. CHECK TEL ADAPTER UNIT

Check tel adapter unit. Bose Audio.
Is the inspection result normal?
YES- GO TO 4.
NO- Replace BOSE AMP.

4. REPLACE RETRACTABLE HARD TOP CONTROL UNIT

Replace retractable hard top control unit. Service and Repair.
Is the inspection result normal?
YES- INSPECTION END
NO- GO TO 5.

5. CHECK INTERMITTENT INCIDENT

Intermittent Incident.
- INSPECTION END