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, refer to "DTC Inspection Priority Chart" 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 "Diagnosis Procedure" 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. Refer to "BOSE AMP. : Diagnosis Procedure" With Navigation.
Is the inspection result normal?
YES- GO TO 4.
NO- Replace BOSE AMP.

3. CHECK TEL ADAPTER UNIT

Check tel adapter unit. Refer to "TEL ADAPTER UNIT : Diagnosis Procedure" 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. Refer to "Removal and Installation" Service and Repair.
Is the inspection result normal?
YES- INSPECTION END
NO- GO TO 5.

5. CHECK INTERMITTENT INCIDENT

Refer to "Intermittent Incident" Intermittent Incident.
- INSPECTION END