RX400h · Service Manual HYBRID SYSTEM

P0705-757

Diagnostic trouble codes

DESCRIPTION

The park/neutral position switch sends 8 switch signals to the HV control ECU. The HV control ECU uses the signals to detect the shift lever position (P, R, N, D, or B) and control for such as the car moving forward and reverse.
DTC No.
 INF Code
 DTC Detection Condition
 Trouble Area
P0705
 757
 Park/neutral position switch pattern problem
  1. Wire harness or connector
  2. Park/neutral position switch
  3. HV control ECU
P0705
 758
 Shifting malfunction (open circuit in MJ)
  1. Wire harness or connector
  2. Park/neutral position switch
  3. HV control ECU
P0851
 775
 N signal circuit malfunction
  1. Wire harness or connector
  2. Park/neutral position switch
  3. HV control ECU

WIRING DIAGRAM

A113947E02

INSPECTION PROCEDURE


1. CLEAR DTC (HV)

  1. Connect the intelligent tester to the DLC3.

  1. Turn the ignition switch to the ON position.

  1. Select the following menu items: Powertrain / Hybrid Control / DTC.

  1. Read and record the DTCs and freeze frame data.

  1. Select the following menu items: Powertrain / Hybrid Control / DTC / Clear.

  1. Clear the DTCs. (Click here)


NEXT


2. READ VALUE OF INTELLIGENT TESTER (SHIFT POSITION)

  1. Connect the intelligent tester to the DLC3.

  1. Turn the ignition switch to the ON position.

  1. Select the following menu items: Powertrain / Hybrid Control / Data List / Shift Position.

  1. While slowly moving the shift lever from the P to B position, then back to P, read the data list (shift position) displayed on the intelligent tester.

    HINT:
    Be sure to slowly move the shift lever.


    Result:

    		 Shift Position
    ECU Data List
    		 P
    		 R
    		 N
    		 D
    		 B
    P
    		 ON
    		 OFF
    		 OFF
    		 OFF
    		 OFF
    R
    		 OFF
    		 ON
    		 OFF
    		 OFF
    		 OFF
    N
    		 OFF
    		 OFF
    		 ON
    		 OFF
    		 OFF
    D
    		 OFF
    		 OFF
    		 OFF
    		 ON
    		 OFF
    B
    		 OFF
    		 OFF
    		 OFF
    		 OFF
    		 ON
    RV
    		 OFF
    		 ON
    		 OFF
    		 OFF
    		 OFF
    FD
    		 OFF
    		 OFF
    		 OFF
    		 ON
    		 ON
    MJ
    		 ON
    		 ON
    		 ON
    		 ON
    		 ON

  1. Check that no DTCs are output.

    Result:
    DTCs P0705-757, P0705-758, and P0851-775 are not output.



 OK
CHECK FOR INTERMITTENT PROBLEMS
NG


3. INSPECT HYBRID VEHICLE CONTROL ECU

  1. A103658E38
    Turn the ignition switch to the ON position.

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

    Standard Voltage:
    Shift Position
    		 Tester Connection
    		 Specified Condition
    P
    		 P (H32-12) - Body ground
    		 10 to 14V
    Any position except P
    		 P (H32-12) - Body ground
    		 0V
    R
    		 R (H32-11) - Body ground
    		 10 to 14V
    Any position except R
    		 R (H32-11) - Body ground
    		 0V
    N
    		 N (H32-10) - Body ground
    		 10 to 14V
    Any position except N
    		 N (H32-10) - Body ground
    		 1 to 2.5V
    D
    		 D (H32-9) - Body ground
    		 10 to 14V
    Any position except D
    		 D (H32-9) - Body ground
    		 0V
    B
    		 B (H32-8) - Body ground
    		 10 to 14V
    Any position except B
    		 B (H32-8) - Body ground
    		 0V
    P, R, N, D, or B
    		 MJ (H33-10) - Body ground
    		 10 to 14V
    D or B
    		 FD (H33-11) - Body ground
    		 10 to 14V
    Any position except D and B
    		 FD (H33-11) - Body ground
    		 0V
    R
    		 RV (H33-12) - Body ground
    		 10 to 14V
    Any position except R
    		 RV (H33-12) - Body ground
    		 0V



OK
REPLACE HYBRID VEHICLE CONTROL ECU
NG


4. CHECK HARNESS AND CONNECTOR (PARK/NEUTRAL POSITION SWITCH - BODY GROUND)

  1. A112793E02
    Disconnect the S35 park/neutral position switch connector.

  1. Turn the ignition switch to the ON position.

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

    Standard Voltage:
    Tester Connection
    		 Specified Condition
    +B (S35-8) - Body ground
    		 10 to 14V

    NOTICE:
    Turning the ignition switch to the ON position with the park/neutral position switch connector disconnected causes other DTCs to be stored. Clear the DTCs after performing the inspection.



 NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK


5. CHECK HARNESS AND CONNECTOR (HV CONTROL ECU - PARK/NEUTRAL POSITION SWITCH)

  1. A114856E02
    Disconnect the H32 and H33 connectors from the HV control ECU.

  1. Disconnect the S35 park/neutral position switch connector.

  1. Measure the voltage according to the value(s) in the table below when the ignition switch is in the ON position.

    Standard Voltage:
    Tester Connection
    		 Specified Condition
    P (H32-12) - Body ground
    		 Below 1 V
    R (H32-11) - Body ground
    		 Below 1 V
    N (H32-10) - Body ground
    		 Below 1 V
    D (H32-9) - Body ground
    		 Below 1 V
    B (H32-8) - Body ground
    		 Below 1 V
    MJ (H33-10) - Body ground
    		 Below 1 V
    FD (H33-11) - Body ground
    		 Below 1 V
    RV (H33-12) - Body ground
    		 Below 1 V

    NOTICE:
    Turning the ignition switch to the ON position with the park/neutral position switch connector and HV control ECU connectors disconnected causes other DTCs to be stored. Clear the DTCs after performing the inspection.

  1. Turn the ignition switch off.

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

    Standard Resistance (Check for open):
    Tester Connection
    		 Specified Condition
    P (H32-12) - P (S35-3)
    		 Below 1 Ω
    R (H32-11) - R (S35-4)
    		 Below 1 Ω
    N (H32-10) - N (S35-2)
    		 Below 1 Ω
    D (H32-9) - D (S35-1)
    		 Below 1 Ω
    B (H32-8) - B (S35-7)
    		 Below 1 Ω
    MJ (H33-10) - MJ (S35-5)
    		 Below 1 Ω
    FD (H33-11) - FD (S35-6)
    		 Below 1 Ω
    RV (H33-12) - RV (S35-9)
    		 Below 1 Ω

    Standard Resistance (Check for short):
    Tester Connection
    		 Specified Condition
    P (H32-12) or P (S35-3) - Body ground
    		 10 kΩ or higher
    R (H32-11) or R (S35-4) - Body ground
    		 10 kΩ or higher
    N (H32-10) or N (S35-2) - Body ground
    		 10 kΩ or higher
    D (H32-9) or D (S35-1) - Body ground
    		 10 kΩ or higher
    B (H32-8) or B (S35-7) - Body ground
    		 10 kΩ or higher
    MJ (H33-10) or MJ (S35-5) - Body ground
    		 10 kΩ or higher
    FD (H33-11) or FD (S35-6) - Body ground
    		 10 kΩ or higher
    RV (H33-12) or RV (S35-9) - Body ground
    		 10 kΩ or higher



NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

REPLACE PARK/NEUTRAL POSITION SWITCH


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