RX400h · Service Manual BODY

TERMINALS OF ECU

System information


CHECK OUTER MIRROR CONTROL ECU LH
B069728E04

  1. Disconnect the R17 connector.

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

    Standard voltage:
    Symbols (Terminal No.)
    		 Wiring Color
    		 Terminal Description
    		 Condition
    		 Specified Condition
    BDR (P17-3) - Body ground
    		 G - Body ground
    		 +B power supply
    		 Always
    		 10 to 14 V
    CPUB (P17-7) - Body ground
    		 L-B - Body ground
    		 +B power supply
    		 Always
    		 10 to 14 V
    SIG (P17-8) - Body ground
    		 GR - Body ground
    		 Ignition power supply
    		Ignition switch OFF → ON
    		 0 V → 10 to 14 V


    Standard resistance:
    Symbols (Terminal No.)
    		 Wiring Color
    		 Terminal Description
    		 Condition
    		 Specified Condition
    GND (P27-1) - Body ground
    		 W-B - Body ground
    		 Ground
    		 Always
    		 Below 1 Ω

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

  3. Reconnect the R17 connector.

  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
    LMVR (R22-1) - Body ground
    		 V - Body ground
    		 Outer mirror switch signal (Up or Right)
    		 Ignition switch ACC, Left/Right adjustment switch L side, Mirror switch OFF→ UP or Right
    		 0 V → 10 to 14 V
    HTR+ (R22-4) - HTR- (R22-12)
    		 B - B
    		 Mirror heater signal
    		 Mirror heater switch ON
    		 0 V → 10 to 14 V
    LVC (R22-5) - Body ground
    		 R-W - Body ground
    		 Power source for mirror position sensor
    		 Ignition switch OFF → ACC
    		 0 V → 0 to 5 V
    VSSR (R22-6) - Body ground
    		 Y-B - Body ground
    		 Vertical direction position signal
    		 Ignition switch ACC, Left/Right adjustment switch L side, Mirror switch uppermost position → lowermost position
    		 0 V → 1 to 3V
    LMHR (R22-9) - Body ground
    		 BR - Body ground
    		 Outer mirror switch signal (Left or Down)
    		 Ignition switch ACC, Left/Right adjustment switch L side, Mirror switch OFF→ LEFT or DOWN
    		 0 V → 10 to 14 V
    LM+R (R22-10) - Body ground
    		 R - Body ground
    		 Outer mirror switch signal (Right or Down)
    		 Ignition switch ACC, Left/Right adjustment switch L side, Mirror switch OFF→ RIGHT or DOWN
    		 0 V → 10 to 14 V
    HSSR (R22-13) - Body ground
    		 P - Body ground
    		 Horizontal direction position signal
    		 Ignition switch ACC, Left/Right adjustment switch L side, Mirror switch innermost position → outermost position
    		 0 V → 1 to 3 V


CHECK OUTER MIRROR CONTROL ECU RH
B069726E05

  1. Disconnect the R18 connector.

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

    Standard voltage:
    Symbols (Terminal No.)
    		 Wiring Color
    		 Terminal Description
    		 Condition
    		 Specified Condition
    BDR (P18-3) - Body ground
    		 G - Body ground
    		 +B power supply
    		 Always
    		 10 to 14 V
    CPUB (P18-7) - Body ground
    		 L-B - Body ground
    		 +B power supply
    		 Always
    		 10 to 14 V
    SIG (P18-8) - Body ground
    		 GR - Body ground
    		 Ignition power supply
    		Ignition switch OFF → ON
    		 0 V → 10 to 14 V


    Standard resistance:
    Symbols (Terminal No.)
    		 Wiring Color
    		 Terminal Description
    		 Condition
    		 Specified Condition
    GND (P18-1) - Body ground
    		 W-B - Body ground
    		 Ground
    		 Always
    		 Below 1 Ω

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

  3. Reconnect the R18 connector.

  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
    LMVR (R23-1) - Body ground
    		 V - Body ground
    		 Outer mirror switch signal (Up or Right)
    		 Ignition switch ACC, Left/Right adjustment switch L side, Mirror switch OFF→ UP or Right
    		 0 V → 10 to 14 V
    HTR+ (R23-4) - HTR- (R30-12)
    		 B - B
    		 Mirror heater signal
    		 Mirror heater switch ON
    		 0 V → 10 to 14 V
    LVC (R23-5) - Body ground
    		 R-W - Body ground
    		 Power source for mirror position sensor
    		 Ignition switch OFF → ACC
    		 0 V → 0 to 5 V
    VSSR (R23-6) - Body ground
    		 Y-B - Body ground
    		 Vertical direction position signal
    		 Ignition switch ACC, Left/Right adjustment switch L side, Mirror switch uppermost position → lowermost position
    		 0 V → 1 to 3V
    LMHR (R23-9) - Body ground
    		 BR - Body ground
    		 Outer mirror switch signal (Left or Down)
    		 Ignition switch ACC, Left/Right adjustment switch L side, Mirror switch OFF→ LEFT or DOWN
    		 0 V → 10 to 14 V
    LM+R (R23-10) - Body ground
    		 R - Body ground
    		 Outer mirror switch signal (Right or Down)
    		 Ignition switch ACC, Left/Right adjustment switch L side, Mirror switch OFF→ RIGHT or DOWN
    		 0 V → 10 to 14 V
    HSSR (R23-13) - Body ground
    		 P - Body ground
    		 Horizontal direction position signal
    		 Ignition switch ACC, Left/Right adjustment switch L side, Mirror switch innermost position → outermost position
    		 0 V → 1 to 3 V

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