RX400h · Service Manual HYBRID SYSTEM

P0A32-666

Diagnostic trouble codes

DESCRIPTION

Refer to the description for DTC P0A2C-247. (Click here)
DTC No.
 INF Code
 DTC Detection Condition
 Trouble Area
P0A32
 666
 GND short in rear motor temperature sensor circuit
  1. Wire harness or connector
  2. HV control ECU
  3. Rear traction motor w/ transaxle assembly
P0A33
 665
 Open or +B short in rear motor temperature sensor circuit
  1. Wire harness or connector
  2. HV control ECU
  3. Rear traction motor w/ transaxle assembly

HINT:
After confirming that DTC P0A32-666 or P0A33-665 is output, use the intelligent tester to check "Rr MOTOR TEMP" in the HV system ECU data list.

Displayed Temperature
 Malfunction
-50°C
 Open or +B short circuit
205°C
 GND short

WIRING DIAGRAM

A113954E02

INSPECTION PROCEDURE


1. CHECK CONNECTION CONDITION OF HYBRID VEHICLE CONTROL ECU CONNECTOR (LOOSENESS AND POOR CONTACT)

  1. A103658E18
    Check the connections of all HV control ECU connectors.

    OK:
    Connectors are connected securely and there is no poor connection.



 NG
CONNECT SECURELY
OK


2. READ VALUE OF INTELLIGENT TESTER (Rr MOTOR TEMP)

  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 / Rr Motor Temp.

  1. Read the value of "Rr Motor Temp" in the data list displayed on the intelligent tester.

    Result:

    		 A
    		 B
    		 C
    Rr MOTOR TEMP (°C)
    		 -50
    		 205
    		 -49 to 204

    HINT:
    1. If there is an open or +B short circuit, -50°C will be displayed.
    2. If there is a GND short circuit, 205°C will be displayed.



 B
Go to step 6

C
CHECK FOR INTERMITTENT PROBLEMS
A


3. INSPECT REAR MOTOR TEMPERATURE SENSOR

  1. A105156E02
    Disconnect the M10 rear motor temperature sensor connector.

  1. Turn the ignition switch to the ON position.

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

    Result:
    Tester Connection
    		 Voltage
    		 Proceed to
    RMT (M10-1) - RMTG (M10-3)
    		 Approximately 5 V
    		 A
    9 to 14V
    		 B
    Approximately 0 V
    		 C

    HINT:
    The rear motor temperature sensor is not available as a single product. If it requires replacement, replace the rear traction motor w/ transaxle assembly.



 B
Go to step 4

C
Go to step 5
A

REPLACE REAR TRACTION MOTOR W/TRANSAXLE ASSEMBLY

4. CHECK HARNESS AND CONNECTOR (HV CONTROL ECU - REAR MOTOR TEMPERATURE SENSOR)

  1. A105211E02
    Disconnect the H30 connector from the HV control ECU.

  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
    RMT (M10-1) - Body ground
    		 Approximately 0 V

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



 NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

REPLACE HYBRID VEHICLE CONTROL ECU

5. READ VALUE OF INTELLIGENT TESTER (Rr MOTOR TEMP)

  1. Using SST, create a short circuit between terminals RMT (H30-21) and RMTG (H30-20 )of the vehicle side connector of the HV control ECU.

  1. Turn the ignition switch to the ON position.

  1. Select the following menu items: Powertrain / Hybrid Control / Data List / Rr Motor Temp.

  1. A103658E20
    Read the value of "Rr Motor Temp" displayed on the intelligent tester.

    Standard:
    Displayed temperature is 205°C

    HINT:
    If the intelligent tester shows a temperature of -50°C, check the connection of the HV control ECU. If it is connected normally, replace the HV control ECU.



 NG
REPLACE HYBRID VEHICLE CONTROL ECU
OK

REPAIR OR REPLACE HARNESS OR CONNECTOR

6. READ VALUE OF INTELLIGENT TESTER (Rr MOTOR TEMP)

  1. Disconnect the M10 rear motor temperature sensor connector.

  1. Turn the ignition switch to the ON position.

  1. Select the following menu items: Powertrain / Hybrid Control / Data List / Rr Motor Temp.

  1. Read the value of "Rr Motor Temp" displayed on the intelligent tester.

    Standard:
    Displayed temperature is -50°C

    HINT:
    The rear motor temperature sensor is not available as a single product. If it requires replacement, replace the rear traction motor w/ transaxle assembly.



 OK
REPLACE REAR TRACTION MOTOR W/TRANSAXLE ASSEMBLY
NG


7. READ VALUE OF INTELLIGENT TESTER (Rr MOTOR TEMP)

  1. Disconnect the H30 connector from the HV control ECU.

  1. Turn the ignition switch to the ON position.

  1. Select the following menu items: Powertrain / Hybrid Control / Data List / Rr Motor Temp.

  1. A103663E01
    Read the value of "Rr Motor Temp" displayed on the intelligent tester.

    Standard:
    Displayed temperature is -50°C

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



 NG
REPLACE HYBRID VEHICLE CONTROL ECU
OK

REPAIR OR REPLACE HARNESS OR CONNECTOR


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