B172B

B172B ROOF STATUS SIGNAL (AUDIO)





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, Retractable Hard Top Control Unit, 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. .
Is the inspection result normal?
YES - GO TO 4.
NO - Replace BOSE AMP.
3.CHECK TEL ADAPTER UNIT
Check tel adapter unit. Tel Adapter Unit Bose Audio Without Navigation.
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