DTC B2542: Abnormal Luggage Door 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
   Luggage Pulse/Lh Value	Luggage 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 Q43 and Q35 connectors.
   Fig 1: Identifying Q43 & 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
   Q43-6 (LPLB) - Q35-15 (LPLB)	Always	Below 1 Ω
   Q43-5 (LPL) - Q35-23 (LPL)	Always	Below 1 Ω
   Q43-4 (LPLE) - Q35-12 (LPLE)	Always	Below 1 Ω
   Q35-15 (LPLB) - Q35-12 (LPLE)	Always	10 kΩ or higher
   Q35-23 (LPL) - Q35-12 (LPLE)	Always	10 kΩ or higher
   Q35-15 (LPLB) - Body ground	Always	10 kΩ or higher
   Q35-23 (LPL) - Body ground	Always	10 kΩ or higher
   Q35-12 (LPLE) - Body ground	Always	10 kΩ or higher

   TEXT IN ILLUSTRATION
   
   

   *1	Front view of wire harness connector (to Luggage Compartment Door Hinge 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 Q43 and A connectors.
   Fig 2: Identifying Q43 & A 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
   Q43-6 (LPLB) - Q43-4 (LPLE)	Always	10 kΩ or higher
   Q43-5 (LPL) - Q43-4 (LPLE)	Always	10 kΩ or higher
   Q43-6 (LPLB) - A-6	Always	Below 1 Ω
   Q43-5 (LPL) - A-5	Always	Below 1 Ω
   Q43-4 (LPLE) - A-4	Always	Below 1 Ω

   TEXT IN ILLUSTRATION
   
   

   *1	Component without harness connected (Luggage Compartment Door Hinge Assembly LH)

NG → REPLACE LUGGAGE COMPARTMENT DOOR HINGE ASSEMBLY LH (HARNESS OR CONNECTOR) 

OK: Go to next step 

1. Reconnect the Q35 and Q45 connectors.
   Fig 3: Identifying Q35 & Q45 Connectors

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

   Standard Voltage

   Tester Connection	Condition	Specified Condition
   A-6 - A-4	Always	6 to 10 V

   TEXT IN ILLUSTRATION
   
   

   *1	Component without harness connected (Luggage Compartment Door Hinge Assembly LH)

NG → REPLACE SLIDING ROOF CONTROL ECU ASSEMBLY 

OK → REPLACE LUGGAGE DOOR DRIVE GEAR ASSEMBLY LH (LUGGAGE MOTOR LH)