B2540

SLIDING ROOF / CONVERTIBLE: RETRACTABLE HARDTOP SYSTEM: B2540: Abnormal Difference Between RH and LH Roof Drive Motor Pulse
B2540 - Abnormal Difference Between RH and LH Roof Drive Motor Pulse

DESCRIPTION

The sliding roof control ECU assembly controls the speed of the roof panels using pulse signals that are generated by the rotation of the sliding roof drive gear assembly RH (roof motor RH) and sliding roof drive gear assembly LH (roof motor LH).





WIRING DIAGRAM





INSPECTION PROCEDURE

NOTICE:
Before starting troubleshooting, check that there are no mechanical problems.

PROCEDURE

1. READ VALUE USING TECHSTREAM (ROOF PULSE/RH VALUE, ROOF PULSE/LH VALUE)

(a) Connect the Techstream to the DLC3.

(b) Turn the engine switch on (IG).

(c) Turn the Techstream on.

(d) Enter the following menus: Body Electrical / Retractable Hardtop / Data List.

(e) Read the Data List according to the display on the Techstream.

Retractable Hardtop (Sliding Roof Control ECU Assembly)





OK:

The Techstream display changes according to condition as shown in the table.

NG -- CHECK HARNESS AND CONNECTOR (SLIDING ROOF DRIVE GEAR RH - SLIDING ROOF CONTROL ECU)

OK -- REPLACE SLIDING ROOF CONTROL ECU ASSEMBLY

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

(a) Disconnect the P56 and P53 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 -- Continue to next step.

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

(a) Disconnect the Q40 and Q35 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