B256A

SLIDING ROOF / CONVERTIBLE: RETRACTABLE HARDTOP SYSTEM: B256A: Lock in Back Window Panel Lock Motor Circuit
B256A - Lock in Back Window Panel Lock Motor Circuit

DESCRIPTION

The sliding roof drive gear sub-assembly (roof rear lock motor) locks/unlocks the roof lock when the back window panel is fully closed.





WIRING DIAGRAM





INSPECTION PROCEDURE

NOTICE:
* Since this malfunction may be detected due to the protection circuit operation in the motor, check that the motor has cooled down sufficiently before performing DTC check again.
* These DTCs are stored when the protection circuit in the motor operates due to a mechanical malfunction during metal top system operation.
* Before starting troubleshooting, perform the switch inspection for DTC B253B.

PROCEDURE

1. INSPECT SLIDING ROOF DRIVE GEAR SUB-ASSEMBLY (ROOF REAR LOCK MOTOR)

(a) Remove the sliding roof drive gear sub-assembly (roof rear lock motor).





(b) Apply battery voltage and check operation of the roof rear lock motor.

OK:





(c) Connect an electrical tester DC 400 A probe to the wire harness of the motor.

NOTICE:
Match the arrow mark of the probe with the direction of the current flow.

(d) Measure the current according to the value(s) in the table below.

NOTICE:
Make sure to perform the inspection after the motor cools down sufficiently. Otherwise the result may not meet the specified condition due to protection circuit operation in the motor.

Standard Current:





Text in Illustration





NG -- REPLACE SLIDING ROOF DRIVE GEAR SUB-ASSEMBLY (ROOF REAR LOCK MOTOR)
OK -- Continue to next step.

2. CHECK HARNESS AND CONNECTOR (SLIDING ROOF DRIVE GEAR - SLIDING ROOF CONTROL ECU)

(a) Disconnect the f1 and Q34 connectors.





(b) Measure the resistance according to the value(s) in the table below.

Standard Resistance:





Text in Illustration





NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR

OK -- REPLACE SLIDING ROOF CONTROL ECU ASSEMBLY