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Home >> Lexus >> 2010 >> IS 250C Standard >> Repair and Diagnosis >> Body & Frame >> Sun Roof/T-Top/Convertible Top >> Retractable Hardtop (Diagnostic Codes (B2536-B256E) & Circuit Tests) >> Retractable Hardtop System >> DTC B254C: Side Package Tray Switch LH Abnormal Operation >> Procedure

DTC B254C: Side Package Tray Switch LH Abnormal Operation: Procedure

  1. READ VALUE USING TECHSTREAM (LH SIDE PAC TRAY SW NO. 1, LH SIDE PAC TRAY SW NO. 2) 
    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 Side Pack Tray SW No. 1 No. 1 side package tray LH switch signal/ON or OFF ON: No. 1 side package tray LH switch on (No. 2 package tray trim hinge fully closed)
      OFF: No. 1 side package tray LH switch off (No. 2 package tray trim hinge fully open)      		 -
      LH Side Pac Tray SW No. 2 No. 2 side package tray LH switch signal/ON or OFF ON: No. 2 side package tray LH switch on (No. 2 package tray trim hinge fully closed)
      OFF: No. 2 side package tray LH switch off (No. 2 package tray trim hinge fully open)      		 -

      Result

      Result Proceed to
      NG (LH Side Pack Tray SW No. 1) A
      NG (LH Side Pac Tray SW No. 2) B
      OK C

    C → REPLACE SLIDING ROOF CONTROL ECU ASSEMBLY 

    B → See step   4 

    A: Go to next step 

  2. INSPECT NO. 2 PACKAGE TRAY TRIM HINGE (NO. 1 SLIDE PACKAGE TRAY LH SWITCH) 
    1. Disconnect the h8 connector.
      Fig 1: Identifying H8 Connector
      GTY256216Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      TEXT IN ILLUSTRATION

      *1 Component without harness connected
      (No. 2 Package Tray Trim Hinge)      		 *2 No. 1 Side Package Tray LH Switch
      *3 Fully stowed position *4 Temporarily moved clear position
      *5 Fully deployed position - -
    2. Remove the slide roof motor assembly (side package tray motor).
    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      1 (SPL1) - 2 (SPLE) While changing from fully stowed position to temporarily moved clear position Below 1 Ω → 10 kΩ or higher
      1 (SPL1) - 2 (SPLE) While changing from temporarily moved clear position to fully deployed position 10 kΩ or higher
      1 (SPL1) - Body ground Always 10 kΩ or higher

    NG → REPLACE NO. 2 PACKAGE TRAY TRIM HINGE (NO. 1 SIDE PACKAGE TRAY LH SWITCH) 

    OK: Go to next step 

  3. CHECK HARNESS AND CONNECTOR (NO. 2 PACKAGE TRAY TRIM HINGE - SLIDING ROOF CONTROL ECU) 
    1. Disconnect the h8 and Q36 connectors.
      Fig 2: Identifying H8 & Q36 Connectors
      GTY265036Courtesy 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
      h8-1 (SPL1) - Q36-14 (SPL1) Always Below 1 Ω
      h8-1 (SPL1) - Body ground Always 10 kΩ or higher
      h8-2 (SPLE) - Body ground Always Below 1 Ω
      TEXT IN ILLUSTRATION

      *1 Front view of wire harness connector
      (to No. 2 Package Tray Trim Hinge)
      *2 Front view of wire harness connector
      (to Sliding Roof Control ECU Assembly)

    NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

    OK → REPLACE SLIDING ROOF CONTROL ECU ASSEMBLY 

  4. INSPECT NO. 2 PACKAGE TRAY TRIM HINGE (NO. 2 SIDE PACKAGE TRAY LH SWITCH) 
    1. Disconnect the h8 connector.
      Fig 3: Identifying H8 Connector
      GTY286660Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      TEXT IN ILLUSTRATION

      *1 Component without harness connected
      (No. 2 Package Tray Trim Hinge)      		 *2 No. 2 Side Package Tray LH Switch
      *3 Fully stowed position *4 Temporarily moved clear position
      *5 Fully deployed position - -
    2. Remove the slide roof motor assembly (side package tray motor).
    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      3 (SPL2) - 2 (SPLE) While changing from fully stowed position to temporarily moved clear position Below 1 Ω → 10 kΩ or higher → Below 1 Ω
      3 (SPL2) - 2 (SPLE) While changing from temporarily moved clear position to fully deployed position Below 1 Ω → 10 kΩ or higher
      3 (SPL2) - Body ground Always 10 kΩ or higher

    NG → REPLACE NO. 2 PACKAGE TRAY TRIM HINGE (NO. 2 SIDE PACKAGE TRAY LH SWITCH) 

    OK: Go to next step 

  5. CHECK HARNESS AND CONNECTOR (NO. 2 PACKAGE TRAY TRIM HINGE - SLIDING ROOF CONTROL ECU) 
    1. Disconnect the h8 and Q36 connectors.
      Fig 4: Identifying H8 & Q36 Connectors
      GTY265660Courtesy 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
      h8-3 (SPL2) - Q36-3 (SPL2) Always Below 1 Ω
      h8-3 (SPL2) - Body ground Always 10 kΩ or higher
      h8-2 (SPLE) - Body ground Always Below 1 Ω
      TEXT IN ILLUSTRATION

      *1 Front view of wire harness connector
      (to No. 2 Package Tray Trim Hinge)
      *2 Front view of wire harness connector
      (to Sliding Roof Control ECU Assembly)

    NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

    OK → REPLACE SLIDING ROOF CONTROL ECU ASSEMBLY 

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