DTC B2539: Abnormal Roof Drive Motor LH Pulse: Procedure

1. Connect the Techstream to the DLC3.
2. Turn the engine switch on (IG).
3. Turn the Techstream on.
4. Enter the following menus: Body Electrical / Retractable Hardtop / Data List.
5. Read the Data List according to the display on the Techstream.
   RETRACTABLE HARDTOP (SLIDING ROOF CONTROL ECU ASSEMBLY)
   
   

   Tester Display	Measurement Item/Range	Normal Condition	Diagnostic Note
   Roof Pulse/Lh Value	Roof motor LH pulse/Min.: -4000, Max.: 4000	-4000 to 4000	-

   OK

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

NG → See step   2 

OK → REPLACE SLIDING ROOF CONTROL ECU ASSEMBLY 

1. Disconnect the Q45 and Q35 connectors.
   Fig 1: Identifying Q45 & Q35 Connectors

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   Q40-3 (RPLB) - Q35-25 (RPLB)	Always	Below 1 Ω
   Q40-6 (RPL) - Q35-24 (RPL)	Always	Below 1 Ω
   Q40-7 (RPLE) - Q35-22 (RPLE)	Always	Below 1 Ω
   Q35-24 (RPL) - Q35-22 (RPLE)	Always	10 kΩ or higher
   Q35-25 (RPLB) - Q35-22 (RPLE)	Always	10 kΩ or higher
   Q35-25 (RPLB) - Body ground	Always	10 kΩ or higher
   Q35-24 (RPL) - Body ground	Always	10 kΩ or higher
   Q35-22 (RPLE) - Body ground	Always	10 kΩ or higher

   TEXT IN ILLUSTRATION
   
   

   *1	Front view of wire harness connector (to Sliding Roof Drive Gear Assembly LH)
   *2	Front view of wire harness connector (to Sliding Roof Control ECU Assembly)

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: Go to next step 

1. Disconnect the Q45 connector.
   Fig 2: Identifying Q45 Connector

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Measure the voltage according to the value(s) in the table below.

   Standard Voltage

   Tester Connection	Condition	Specified Condition
   Q40-3 (RPLB) - Body ground	Always	10 kΩ or higher
   Q40-6 (RPL) - Body ground	Always	10 kΩ or higher
   Q40-7 (RPLE) - Body ground	Always	10 kΩ or higher

   TEXT IN ILLUSTRATION
   
   

   *1	Component without harness connected (Sliding Roof Drive Gear Assembly LH)

NG → REPLACE SLIDING ROOF DRIVE GEAR ASSEMBLY LH (ROOF MOTOR LH) 

OK: Go to next step 

1. Reconnect the Q35 connector.
   Fig 3: Identifying Q35 Connector

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Disconnect the Q45 connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   Q40-3 (RPLB) - Q40-7 (RPLE)	Always	6 to 10 V

   TEXT IN ILLUSTRATION
   
   

   *1	Front view of wire harness connector (to Sliding Roof Drive Gear Assembly LH)

NG → REPLACE SLIDING ROOF CONTROL ECU ASSEMBLY 

OK → REPLACE SLIDING ROOF DRIVE GEAR ASSEMBLY LH (ROOF MOTOR LH)