B254F
SLIDING ROOF / CONVERTIBLE: RETRACTABLE HARDTOP SYSTEM: B254F: Unequal RH and LH Back Window Panel Pulse Sensor values Malfunction
B254F - Unequal RH and LH Back Window Panel Pulse Sensor values Malfunction
DESCRIPTION
The sliding roof control ECU assembly controls the speed of the back window panel using pulse signals that are generated by the rotation of the sliding roof drive gear assembly (back window motor RH) and sliding roof drive gear assembly (back window motor LH).
WIRING DIAGRAM
INSPECTION PROCEDURE
PROCEDURE
1. CHECK HARNESS AND CONNECTOR (SLIDE ROOF MOTOR ASSEMBLY - SLIDING ROOF CONTROL ECU)
(a) Disconnect the P57, Q41, P53 and Q35 connectors.
Text in Illustration
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.
2. CHECK SLIDING ROOF CONTROL ECU ASSEMBLY
(a) Reconnect the P57 and P53 connectors.
(b) Disconnect the A connector.
(c) Measure the voltage according to the value(s) in the table below.
Standard Voltage:
Text in Illustration
NG -- REPLACE SLIDING ROOF CONTROL ECU ASSEMBLY
OK -- Continue to next step.
3. CHECK SLIDING ROOF CONTROL ECU ASSEMBLY
(a) Reconnect the Q41 and Q35 connectors.
(b) Disconnect the B connector.
(c) Measure the voltage according to the value(s) in the table below.
Standard Voltage:
Text in Illustration
NG -- REPLACE SLIDING ROOF CONTROL ECU ASSEMBLY
OK -- Continue to next step.
4. REPLACE SLIDING ROOF DRIVE GEAR ASSEMBLY (BACK WINDOW MOTOR RH)
(a) Replace the sliding roof drive gear assembly.
NEXT -- Continue to next step.
5. CLEAR DTC
(a) Clear the DTC Reading and Clearing Diagnostic Trouble Codes.
NEXT -- Continue to next step.
6. CHECK DTC OUTPUT
(a) Operate the retractable hardtop system.
(b) Recheck for DTCs Reading and Clearing Diagnostic Trouble Codes.
OK:
DTC B254F is not output.
NG -- REPLACE SLIDING ROOF DRIVE GEAR ASSEMBLY (BACK WINDOW MOTOR LH)
OK -- END (SLIDING ROOF DRIVE GEAR ASSEMBLY WAS DEFECTIVE)
7. REPLACE SLIDING ROOF DRIVE GEAR ASSEMBLY (BACK WINDOW MOTOR LH)
(a) Replace the sliding roof drive gear assembly.
NEXT -- Continue to next step.
8. CLEAR DTC
(a) Clear the DTC Reading and Clearing Diagnostic Trouble Codes.
NEXT -- Continue to next step.
9. CHECK DTC OUTPUT
(a) Operate the retractable hardtop system.
(b) Recheck for DTCs Reading and Clearing Diagnostic Trouble Codes.
OK:
DTC B254F is not output.
NG -- REPLACE SLIDING ROOF CONTROL ECU ASSEMBLY
OK -- END (SLIDING ROOF DRIVE GEAR ASSEMBLY WAS DEFECTIVE)