B171C

B171C SWITCHING VALVE 1





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 SEE Diagnosis Procedure.
NO - INSPECTION END




Diagnosis Procedure
1.CHECK SWITCHING VALVE 1 POWER SUPPLY CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect hydraulic unit (switching valve 1) harness connector.
3. Turn ignition switch ON.
4. Check the voltage between hydraulic unit (switching valve 1) harness connector and ground.





Is the inspection result normal?
YES - GO TO 2.
NO - Repair or replace harness.
2.CHECK SWITCHING VALVE 1 GROUND CIRCUIT FOR OPEN AND SHORT
1. Turn ignition switch OFF.
2. Disconnect retractable hard top control unit harness connector.
3. Check the continuity between hydraulic unit (switching valve 1) harness connector and retractable hard top control unit harness connector.





4. Check harness for short to ground and short to power.
Is the inspection result normal?
YES - GO TO 3.
NO - Repair or replace harness.
3.REPLACE HYDRAULIC UNIT
Replace hydraulic unit. Removal And Installation.
Is the inspection result normal?
YES - INSPECTION END
NO - GO TO 4.
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