RX400h · Service Manual BODY

TERMINALS OF ECU

System information


MULTIPLEX NETWORK MASTER SWITCH
B069754E07

  1. Disconnect the P19 switch connector.

  2. Measure the voltage and resistance of each terminal according to the value(s) in the table below.

    Standard resistance:
    Symbols (Terminal No.)
    		Wiring Color
    		Terminal Description
    		Condition
    		Specified Condition
    GND (P19-2) - Body ground
    		 W-B - Body ground
    		 Ground
    		 Constant
    		Below 1 Ω


    Standard voltage:
    Symbols (Terminal No.)
    		Wiring Color
    		Terminal Description
    		Condition
    		Specified Condition
    BDR (P19-10) - GND (P19-2)
    		 G - W-B
    		+B power supply
    		Constant
    		10 to 14 V
    CPUB (P19-9) - GND (P19-2)
    		 L-B - W-B
    		+B power supply
    		Constant
    		 10 to 14 V
    SIG (P19-20) - GND (P19-2)
    		 BR - W-B
    		Ignition power supply
    		Ignition switch OFF → ON
    		0 V → 10 to 14 V

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

  3. Reconnect the P19 switch connector and reset the power window motor.

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

    Standard voltage:
    Symbols (Terminal No.)
    		Wiring Color
    		Terminal Description
    		Condition
    		Specified Condition
    UP (P19-1) - GND (P19-2)
    		 GR - W-B
    		Power window motor UP output
    		 Ignition switch ON, Driver side power window switch OFF → UP (Manual operation)
    		 0 V → 10 to 14 V
    UP (P19-1) - GND (P19-2)
    		 GR - W-B
    		Power window motor UP output
    		 Ignition switch ON, Driver side power window fully open → Driver side power window switch UP (AUTO operation) → Driver side power window fully closed
    		 0 V → 10 to 14 V → 0 V
    DN (P19-11) - GND (P19-2)
    		 B - W-B
    		Power window motor DOWN output
    		 Ignition switch ON, Driver side power window switch OFF → DOWN (Manual operation)
    		 10 to 14 V → 0 V
    DN (P19-11) - GND (P19-2)
    		 B - W-B
    		Power window motor DOWN output
    		 Ignition switch ON, Driver side power window fully closed → Driver side power window switch DOWN (AUTO operation) → Driver side power window fully open
    		 10 to 14 V → 0 V
    PWS (P19-6) - GND (P22-2)
    		 O - W-B
    		Power window lock switch output
    		 Ignition switch ON, Power window lock switch UNLOCK → LOCK
    		 10 to 14 V → 0 V
    VCC (P19-19) - GND (P19-2)
    		 O - W-B
    		Power window motor power source
    		 Constant
    		10 to 14 V


CHECK MULTIPLEX NETWORK SWITCH (FRONT PASSENGER SIDE)
B069755E08

  1. Disconnect the P15 (P16) switch connector.

  2. 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
    GND (7) - Body ground
    		 W-B - Body ground
    		 Ground
    		 Constant
    		Below 1 Ω


    Standard voltage:
    Symbols (Terminal No.)
    		Wiring Color
    		Terminal Description
    		Condition
    		Specified Condition
    BDR (12) - GND (7)
    		 G - W-B
    		+B power supply
    		Constant
    		10 to 14 V

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

  3. Reconnect the P15 (P16) switch connector and reset power window motor.

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

    Standard voltage:
    Symbols (Terminal No.)
    		Wiring Color
    		Terminal Description
    		Condition
    		Specified Condition
    UP (6) - GND (7)
    		 GR - W-B
    		Power window motor UP output
    		 Ignition switch ON, Regulator switch OFF → UP (Manual operation)
    		 0 V → 10 to 14 V
    UP (6) - GND (7)
    		 GR - W-B
    		Power window motor UP output
    		 Ignition switch ON, Front passenger side power window fully open → Regulator switch UP (AUTO operation) → Front passenger side power window fully closed
    		 0 V → 10 to 14 V → 0 V
    DN (1) - GND (7)
    		 B - W-B
    		Power window motor DOWN output
    		 Ignition switch ON, Regulator switch OFF → DOWN (Manual operation)
    		 10 to 14 V → 0 V
    DN (1) - GND (7)
    		 B - W-B
    		Power window motor DOWN output
    		 Ignition switch ON, Front passenger side power window fully closed → Regulator switch DOWN (AUTO operation) → Front passenger side power window fully open
    		 10 to 14 V → 0 V
    PCT (11) - GND (7)
    		 O - W-B
    		Power window lock switch output
    		 Ignition switch ON, Power window lock switch UNLOCK → LOCK
    		 10 to 14 V → 0 V
    VCC (5) - SGND (8)
    		 LG - R
    		 Power window motor power source
    		 Constant
    		10 to 14 V

    If the result is not as specified, the multiplex network switch may have a malfunction.


CHECK MULTIPLEX NETWORK SWITCH (REAR LH)
B069755E09

  1. Disconnect the P17 switch connector.

  2. 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
    GND (P17-7) - Body ground
    		 W-B - Body ground
    		 Ground
    		 Constant
    		Below 1 Ω
    SEL2 (P17-10) - GND (P20-7)
    		 W-B - W-B
    		 Terminal for identification of rear LH switch
    		 Constant
    		 Below 1 Ω


    Standard voltage:
    Symbols (Terminal No.)
    		Wiring Color
    		Terminal Description
    		Condition
    		Specified Condition
    BDR (P17-12) - GND (P17-7)
    		 LG - W-B
    		+B power supply
    		Constant
    		10 to 14 V

  3. Reconnect the P17 switch connector and reset the power window motor.

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

    Standard voltage:
    Symbols (Terminal No.)
    		Wiring Color
    		Terminal Description
    		Condition
    		Specified Condition
    UP (P17-6) - GND (P17-7)
    		 V - W-B
    		Power window motor UP output
    		 Ignition switch ON, Regulator switch OFF → UP (Manual operation)
    		 0 V → 10 to 14 V
    UP (P17-6) - GND (P17-7)
    		 V - W-B
    		Power window motor UP output
    		 Ignition switch ON, Rear LH power window fully open → Regulator switch UP (AUTO operation) → Rear LH power window fully closed
    		 0 V → 10 to 14 V → 0 V
    DN (P17-1) - GND (P17-7)
    		 W - W-B
    		Power window motor DOWN output
    		 Ignition switch ON, Regulator switch OFF → DOWN (Manual operation)
    		 10 to 14 V → 0 V
    DN (P17-1) - GND (P17-7)
    		 W - W-B
    		Power window motor DOWN output
    		 Ignition switch ON, Rear LH power window fully closed → Regulator switch DOWN (AUTO operation) → Rear LH power window fully open
    		 10 to 14 V → 0 V
    PCT1 (P17-11) - GND (P17-7)
    		 GR - W-B
    		Power window lock switch output
    		 Ignition switch ON, Power window lock switch UNLOCK → LOCK
    		 10 to 14 V → 0 V
    VCC (P17-5) - SGND (P17-8)
    		 L - BR
    		 Power window motor power source
    		 Constant
    		10 to 14 V

    If the result is not as specified, the multiplex network switch may have a malfunction.


CHECK MULTIPLEX NETWORK SWITCH (REAR RH)
B069755E10

  1. Disconnect the P18 switch connector.

  2. 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
    GND (P18-7) - Body ground
    		 W-B - Body ground
    		 Ground
    		 Constant
    		Below 1 Ω
    SEL1 (P18-9) - GND (P18-7)
    		 W-B - W-B
    		 Terminal for identification of rear RH switch
    		 Constant
    		 Below 1 Ω


    Standard voltage:
    Symbols (Terminal No.)
    		Wiring Color
    		Terminal Description
    		Condition
    		Specified Condition
    BDR (P18-12) - GND (P18-7)
    		 LG - W-B
    		+B power supply
    		Constant
    		10 to 14 V

  3. Reconnect the P18 switch connector and reset the power window motor.

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

    Standard voltage:
    Symbols (Terminal No.)
    		Wiring Color
    		Terminal Description
    		Condition
    		Specified Condition
    UP (P18-6) - GND (P18-7)
    		 V - W-B
    		Power window motor UP output
    		 Ignition switch ON, Regulator switch OFF → UP (Manual operation)
    		 0 V → 10 to 14 V
    UP (P18-6) - GND (P18-7)
    		 V - W-B
    		Power window motor UP output
    		 Ignition switch ON, Rear RH power window fully open → Regulator switch UP (AUTO operation) → Rear RH power window fully closed
    		 0 V → 10 to 14 V → 0 V
    DN (P18-1) - GND (P18-7)
    		 W - W-B
    		Power window motor DOWN output
    		 Ignition switch ON, Regulator switch OFF → DOWN (Manual operation)
    		 10 to 14 V → 0 V
    DN (P18-1) - GND (P18-7)
    		 W - W-B
    		Power window motor DOWN output
    		 Ignition switch ON, Rear RH power window fully closed → Regulator switch DOWN (AUTO operation) → Rear RH power window fully open
    		 10 to 14 V → 0 V
    PCT1 (P18-11) - GND (P18-7)
    		 GR - W-B
    		Power window lock switch output
    		 Ignition switch ON, Power window lock switch UNLOCK → LOCK
    		 10 to 14 V → 0 V
    VCC (P18-5) - SGND (P18-8)
    		 L - BR
    		 Power window motor power source
    		 Constant
    		10 to 14 V

    If the result is not as specified, the multiplex network switch may have a malfunction.


CHECK INSTRUMENT PANEL J/B (BODY ECU)
B070993E02

  1. Disconnect the B5, B6 and B7 ECU connectors.

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

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

    Standard resistance:
    Symbols (Terminal No.)
    		Wiring Color
    		Terminal Description
    		Condition
    		Specified Condition
    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
    PCTY (B7-23) - Body ground
    		 L - W-B
    		 Front passenger side courtesy switch input
    		 Passenger side door CLOSED → OPEN
    		 10 KΩ or higher → Below 1 Ω
    DCTY (B5-14) - Body ground
    		 L - Body ground
    		 Driver side courtesy switch input
    		 Driver side door CLOSED → OPEN
    		 10 KΩ or higher → Below 1 Ω
    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

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

  4. Reconnect the B4, B5 and B6 ECU connectors.

  5. Reconnect the 1M and 1F J/B connectors.

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

    Standard voltage:
    Symbols (Terminal No.)
    		Wiring Color
    		Terminal Description
    		Condition
    		Specified Condition
    KSW (B6-21) - Body ground
    		 B - Body ground
    		 Key unlock warning switch input
    		 No key in ignition key cylinder → Key inserted
    		 10 to 14 V → 0 V

    If the result is not as specified, the instrument panel J/B (body ECU) may have a malfunction.

← PROBLEM SYMPTOMS TABLEDIAGNOSIS SYSTEM →