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Home >> Toyota >> 2014 >> RAV4 EV >> Repair and Diagnosis >> Hybrid/Electric Powertrain >> Testing and Diagnosis >> Hybrid Control System (Diagnostic Codes (Chg_F076 - U0424-537) & Circuit Tests)) (Electric) >> Hybrid Control System >> DTC P3108-536: Lost Communication with A/C System Control Module [09/2013 - ] >> Procedure

DTC P3108-536: Lost Communication with A/C System Control Module [09/2013 - ]: Procedure

  1. CHECK CONNECTOR CONNECTION CONDITION (POWER MANAGEMENT CONTROL ECU CONNECTOR) See step   1 

    NG → CONNECT SECURELY 

    OK: Go to next step 

  2. CHECK CONNECTOR CONNECTION CONDITION (COMPRESSOR ASSEMBLY WITH BRACKET CONNECTOR) 
    1. Check the connection of the low voltage connector of the compressor assembly with bracket.
      GTY380230Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      OK

      The connector is connected securely and there are no contact problems.

    NG → CONNECT SECURELY 

    OK: Go to next step 

  3. CHECK HARNESS AND CONNECTOR (COMPRESSOR ASSEMBLY WITH BRACKET POWER SOURCE CIRCUIT) 
    1. Disconnect connector A62 from the compressor assembly with bracket.
    2. Measure the resistance according to the value(s) in the table below.
      GTY381936Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Standard Resistance

      Tester Connection Switch Condition Specified Condition
      A62-1 (GND) - Body ground Power switch off Below 1 Ω
      TEXT IN ILLUSTRATION

      *a Front view of wire harness connector
      (to Compressor Assembly with Bracket)
    3. Turn the power switch on (IG).
    4. Measure the voltage according to the value(s) in the table below.

      Standard Voltage

      Tester Connection Switch Condition Specified Condition
      A62-7 (IG1) - A62-1 (GND) Power switch on (IG) 11 to 14 V
      NOTE:

      Turning the power switch on (IG) with the compressor assembly with bracket connector disconnected causes other DTCs to be stored. Clear the DTCs after performing this inspection.

    5. Turn the power switch off.
    6. Connect the compressor assembly with bracket connector.

    NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

    OK: Go to next step 

  4. CHECK DTC OUTPUT (EV) 
    1. Connect the Techstream to the DLC3.
    2. Turn the power switch on (READY).
    3. Enter the following menus: Powertrain / EV / Trouble Codes.
    4. Check if DTCs are output.

      Result

      Result Proceed to
      DTC P3108-536 is output. A
      DTC P3108-536 is not output. B
    5. Turn the power switch off.

    B → See step   8 

    A: Go to next step 

  5. CHECK HARNESS AND CONNECTOR (POWER MANAGEMENT CONTROL ECU - COMPRESSOR WITH MOTOR) 
    1. Disconnect connector A56 from the power management control ECU.
    2. Disconnect connector A62 from the compressor assembly with bracket.
    3. Turn the power switch on (IG).
    4. Measure the voltage according to the value(s) in the table below.
      GTY362839Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Standard Voltage

      Tester Connection Switch Condition Specified Condition
      A56-19 (CLK) - Body ground Power switch on (IG) Below 1 V
      A56-30 (ETI) - Body ground Power switch on (IG) Below 1 V
      A56-31 (ITE) - Body ground Power switch on (IG) Below 1 V
      TEXT IN ILLUSTRATION

      *a Front view of wire harness connector
      (to Compressor Assembly with Bracket)
      *b Rear view of wire harness connector
      (to Power Management Control ECU)
      NOTE:

      Turning the power switch on (IG) with the power management control ECU connector and the compressor assembly with bracket connector disconnected causes other DTCs to be stored. Clear the DTCs after performing this inspection.

    5. Turn the power switch off.
    6. Measure the resistance according to the value(s) in the table below.

      Standard Resistance (Check for Open)

      Tester Connection Switch Condition Specified Condition
      A56-19 (CLK) - A62-5 (CLK) Power switch off Below 1 Ω
      A56-30 (ETI) - A62-6 (DOUT) Power switch off Below 1 Ω
      A56-31 (ITE) - A62-3 (DIN) Power switch off Below 1 Ω

      Standard Resistance (Check for Short)

      Tester Connection Switch Condition Specified Condition
      A56-19 (CLK) or A62-5 (CLK) - Body ground and other terminals Power switch off 10 kΩ or higher
      A56-30 (ETI) or A62-6 (DOUT) - Body ground and other terminals Power switch off 10 kΩ or higher
      A56-31 (ITE) or A62-3 (DIN) - Body ground and other terminals Power switch off 10 kΩ or higher
    7. Connect the compressor assembly with bracket connector.
    8. Connect the power management control ECU connector.

    NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

    OK: Go to next step 

  6. CHECK POWER MANAGEMENT CONTROL ECU 
    1. Disconnect connector A62 from the compressor assembly with bracket.
    2. Measure the resistance according to the value(s) in the table below.
      GTY381937Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Standard Resistance

      Tester Connection Switch Condition Specified Condition
      A62-6 (DOUT) - Body ground Power switch off 10 kΩ or higher
      TEXT IN ILLUSTRATION

      *a Front view of wire harness connector
      (to Compressor Assembly with Bracket)
    3. Turn the power switch on (IG).
    4. Measure the voltage according to the value(s) in the table below.

      Standard Voltage

      Tester Connection Switch Condition Specified Condition
      A62-5 (CLK) - Body ground Power switch on (IG) 11 to 14 V
      A62-3 (DIN) - Body ground Power switch on (IG) 11 to 14 V
      A62-6 (DOUT) - Body ground Power switch on (IG) Below 1 V
      NOTE:

      Turning the power switch on (IG) with the compressor assembly with bracket connector disconnected causes other DTCs to be stored. Clear the DTCs after performing this inspection.

    5. Turn the power switch off.
    6. Connect the compressor assembly with bracket connector.

    NG → See step   12 

    OK: Go to next step 

  7. CHECK COMPRESSOR ASSEMBLY WITH BRACKET 
    1. Disconnect connector A56 from the power management control ECU.
    2. Measure the resistance according to the value(s) in the table below.
      GTY365265Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Standard Resistance

      Tester Connection Switch Condition Specified Condition
      A56-19 (CLK) - Body ground Power switch off 10 kΩ or higher
      A56-31 (ITE) - Body ground Power switch off 10 kΩ or higher
      TEXT IN ILLUSTRATION

      *a Rear view of wire harness connector
      (to Power Management Control ECU)
    3. Turn the power switch on (IG).
    4. Measure the voltage according to the value(s) in the table below.

      Standard Voltage

      Tester Connection Switch Condition Specified Condition
      A56-30 (ETI) - Body ground Power switch on (IG) 11 to 14 V
      A56-19 (CLK) - Body ground Power switch on (IG) Below 1 V
      A56-31 (ITE) - Body ground Power switch on (IG) Below 1 V
      NOTE:

      Turning the power switch on (IG) with the power management control ECU connector disconnected causes other DTCs to be stored. Clear the DTCs after performing this inspection.

    5. Turn the power switch off.
    6. Connect the power management control ECU connector.

    NG → See step   11 

    OK → See step   12 

  8. CHECK HARNESS AND CONNECTOR (POWER MANAGEMENT CONTROL ECU - COMPRESSOR WITH MOTOR) 
    1. Disconnect connector A56 from the power management control ECU.
    2. Disconnect connector A62 from the compressor assembly with bracket.
    3. Turn the power switch on (IG).
    4. Measure the voltage according to the value(s) in the table below.
      GTY381463Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Standard Voltage

      Tester Connection Switch Condition Specified Condition
      A56-20 (STB) - Body ground Power switch on (IG) Below 1 V
      TEXT IN ILLUSTRATION

      *a Front view of wire harness connector
      (to Compressor Assembly with Bracket)
      *b Rear view of wire harness connector
      (to Power Management Control ECU)
      NOTE:

      Turning the power switch on (IG) with the power management control ECU connector disconnected causes other DTCs to be stored. Clear the DTCs after performing this inspection.

    5. Turn the power switch off.
    6. Measure the resistance according to the value(s) in the table below.

      Standard Resistance (Check for Open)

      Tester Connection Switch Condition Specified Condition
      A56-20 (STB) - A62-2 (STBI) Power switch off Below 1 Ω

      Standard Resistance (Check for Short)

      Tester Connection Switch Condition Specified Condition
      A56-20 (STB) or A62-2 (STBI) - Body ground and other terminals Power switch off 10 kΩ or higher
    7. Connect the compressor assembly with bracket connector.
    8. Connect the power management control ECU connector.

    NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

    OK: Go to next step 

  9. CHECK POWER MANAGEMENT CONTROL ECU 
    1. Disconnect connector A62 from the compressor assembly with bracket.
    2. Measure the resistance according to the value(s) in the table below.
      GTY365885Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Standard Resistance

      Tester Connection Switch Condition Specified Condition
      A62-2 (STBI) - Body ground Power switch off 10 kΩ or higher
      TEXT IN ILLUSTRATION

      *a Front view of wire harness connector
      (to Compressor Assembly with Bracket)
    3. Turn the power switch on (IG).
    4. Measure the voltage according to the value(s) in the table below.

      Standard Voltage

      Tester Connection Switch Condition Specified Condition
      A62-2 (STBI) - Body ground Power switch on (IG) Below 1 V
      NOTE:

      Turning the power switch on (IG) with the compressor assembly with bracket connector disconnected causes other DTCs to be stored. Clear the DTCs after performing this inspection.

    5. Turn the power switch off.
    6. Connect the compressor assembly with bracket connector.

    NG → See step   12 

    OK: Go to next step 

  10. CHECK COMPRESSOR ASSEMBLY WITH BRACKET 
    1. Disconnect connector A56 from the power management control ECU.
    2. Measure the resistance according to the value(s) in the table below.
      GTY365264Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Standard Resistance

      Tester Connection Switch Condition Specified Condition
      A56-20 (STB) - Body ground Power switch off 10 kΩ or higher
      TEXT IN ILLUSTRATION

      *a Rear view of wire harness connector
      (to Power Management Control ECU)
    3. Turn the power switch on (IG).
    4. Measure the voltage according to the value(s) in the table below.

      Standard Voltage

      Tester Connection Switch Condition Specified Condition
      A56-20 (STB) - Body ground Power switch on (IG) 11 to 14 V
      NOTE:

      Turning the power switch on (IG) with the power management control ECU connector disconnected causes other DTCs to be stored. Clear the DTCs after performing this inspection.

    5. Turn the power switch off.
    6. Connect the power management control ECU connector.

    NG → See step   11 

    OK → See step   12 

  11. REPLACE COMPRESSOR ASSEMBLY WITH BRACKET. Refer to  REMOVAL [09/2013 - ] 
  12. REPLACE POWER MANAGEMENT CONTROL ECU. Refer to  REMOVAL [09/2013 - ] 
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