KEY REMINDER WARNING SYSTEM > TERMINALS OF ECU

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CHECK INSTRUMENT PANEL J/B ASSEMBLY (BODY ECU)


  1. Disconnect the B5 and B6 ECU connectors.


    B112737E02

  2. Disconnect the 1D, 1F and 1M J/B connectors.

  3. Measure the voltage and resistance according to the value(s) in the table below.

    Standard resistance:

    Symbols
    (Terminal No.)
    		Wiring Color
    		Terminal Description
    		Condition
    		Specified Condition
    BECU (1D-10) - Body ground
    		W - Body ground
    		+B (BECU) power supply
    		Constant
    		10 to 14 V
    GND1 (1F-10) - Body ground
    		W-B - Body ground
    		Ground
    		Constant
    		Below 1 Ω
    GND2 (1M-9) - Body ground
    		W-B - Body ground
    		Ground
    		Constant
    		Below 1 Ω
    DCTY (B5-14) - Body ground
    		L - Body ground
    		Driver door courtesy switch input
    		Driver door
    CLOSED → OPEN
    		10 kΩ or higher →
    Below 1 Ω
    KSW (B6-21) - Body ground
    		B - Body ground
    		Key unlock warning switch input
    		No key in ignition key cylinder →
    Key inserted
    		10 kΩ or higher →
    Below 1 Ω

    HINT:
    If the result is not as specified, there may be a malfunction on the wire harness side.

  4. Reconnect the 1D, 1F, 1M, B5 and B6 connectors.

  5. Measure the voltage according to the value(s) in the table below.

    Standard voltage:

    Symbols
    (Terminal No.)
    		Wiring Color
    		Terminal Description
    		Condition
    		Specified Condition
    DCTY(B5-14) - Body ground
    		L - Body ground
    		Driver door courtesy switch input
    		Driver door
    CLOSED → OPEN
    		10 to 14 → 0V