DTC B254E: Back Window Panel LH Pulse Sensor Abnormal Operation: 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
   LH BW Panel Pulse Value	Back window panel 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 Q41 and Q35 connectors.
   Fig 1: Identifying Q41& 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
   Q41-3 (R3LB) - Q35-16 (R3LB)	Always	Below 1 Ω
   Q41-6 (R3L) - Q35-14 (R3L)	Always	Below 1 Ω
   Q41-7 (R3LE) - Q35-13 (R3LE)	Always	Below 1 Ω
   Q35-16 (R3LB) - Body ground	Always	10 kΩ or higher
   Q35-14 (R3L) - Body ground	Always	10 kΩ or higher
   Q35-13 (R3LE) - Body ground	Always	10 kΩ or higher
   Q35-16 (R3LB) - Q35-13 (R3LE)	Always	10 kΩ or higher
   Q35-14 (R3L) - Q35-13 (R3LE)	Always	10 kΩ or higher

   TEXT IN ILLUSTRATION
   
   

   *1	Front view of wire harness connector (to Slide Roof Motor Assembly)
   *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 A connector.
   Fig 2: Identifying A Connector

   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
   A-4 - Body ground	Always	10 kΩ or higher
   A-5 - Body ground	Always	10 kΩ or higher
   A-6 - Body ground	Always	10 kΩ or higher

   TEXT IN ILLUSTRATION
   
   

   *1	Component without harness connected (Slide Roof Motor Assembly)

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

OK: Go to next step 

1. Reconnect the Q41 and Q35 connectors.
   Fig 3: Identifying P57 & P53 Connectors

   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
   A-4 - A-5	Always	6 to 10 V

   TEXT IN ILLUSTRATION
   
   

   *1	Front view of wire harness connector (to Slide Roof Motor Assembly)

NG → REPLACE SLIDING ROOF CONTROL ECU ASSEMBLY 

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