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DTC P3108-536: Lost Communication with A/C System Control Module [08/2013 - ]: Procedure

WARNING: This page is about a different car, the 2014 Lexus ES 300h. However, it is still accessible from the selected car via links, so may be relevant.
  1. CHECK DTC OUTPUT (AIR CONDITIONER) 
    1. Connect the Techstream to the DLC3.
    2. Turn the power switch on (IG).
    3. Enter the following menus: Body Electrical / Air Conditioner / Trouble Codes.
    4. Check if DTCs related to the air conditioning system (A/C) are output.

      Result

      Result Proceed to
      DTCs related to A/C are not output. A
      DTCs related to A/C are output. B
    5. Turn the power switch off.

    B → See step   10 

    A: Go to next step 

  2. CHECK CONNECTOR CONNECTION CONDITION (POWER MANAGEMENT CONTROL ECU CONNECTOR). Refer to  PROCEDURE - Step 3 

    NG → CONNECT SECURELY 

    OK: Go to next step 

  3. CHECK CONNECTOR CONNECTION CONDITION (COMPRESSOR WITH MOTOR ASSEMBLY CONNECTOR) 
    1. Check the connection of connector D60 of the compressor with motor assembly.
      GTY415976Courtesy 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 

  4. CHECK HARNESS AND CONNECTOR (COMPRESSOR WITH MOTOR ASSEMBLY POWER SOURCE CIRCUIT) 
    1. Disconnect the D60 compressor with motor assembly connector.
    2. Measure the resistance according to the value(s) in the table below.
      GTY416586Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Standard Resistance

      Tester Connection Condition Specified Condition
      D60-5 (GND) - Body ground Power switch off Below 1 Ω
      TEXT IN ILLUSTRATION

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

      Standard Voltage

      Tester Connection Condition Specified Condition
      D60-6 (IG1) - D60-5 (GND) Power switch on (IG) 11 to 14 V
      NOTE:

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

    5. Turn the power switch off.
    6. Reconnect the D60 compressor with motor assembly connector.

    NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

    OK: Go to next step 

  5. CHECK HARNESS AND CONNECTOR (POWER MANAGEMENT CONTROL ECU - COMPRESSOR WITH MOTOR ASSEMBLY) 
    1. Disconnect the A31 power management control ECU connector.
    2. Disconnect the D60 compressor with motor assembly connector.
    3. Turn the power switch on (IG).
    4. Measure the voltage according to the value(s) in the table below.
      GTY420193Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Standard Voltage

      Tester Connection Condition Specified Condition
      A31-19 (CLK) - Body ground Power switch on (IG) Below 1 V
      A31-20 (STB) - Body ground Power switch on (IG) Below 1 V
      A31-30 (ETI) - Body ground Power switch on (IG) Below 1 V
      A31-31 (ITE) - Body ground Power switch on (IG) Below 1 V
      TEXT IN ILLUSTRATION

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

      Turning the power switch on (IG) with the power management control ECU connector and the compressor with motor assembly 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 Condition Specified Condition
      A31-19 (CLK) - D60-1 (CLK) Power switch off Below 1 Ω
      A31-20 (STB) - D60-4 (STBI) Power switch off Below 1 Ω
      A31-30 (ETI) - D60-3 (DOUT) Power switch off Below 1 Ω
      A31-31 (ITE) - D60-2 (DIN) Power switch off Below 1 Ω

      Standard Resistance (Check for Short)

      Tester Connection Condition Specified Condition
      A31-19 (CLK) or D60-1 (CLK) - Body ground and other terminals Power switch off 10 kΩ or higher
      A31-20 (STB) or D60-4 (STBI) - Body ground and other terminals Power switch off 10 kΩ or higher
      A31-30 (ETI) or D60-3 (DOUT) - Body ground and other terminals Power switch off 10 kΩ or higher
      A31-31 (ITE) or D60-2 (DIN) - Body ground and other terminals Power switch off 10 kΩ or higher
    7. Reconnect the D60 compressor with motor assembly connector.
    8. Reconnect the A31 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 the D60 compressor with motor assembly connector.
    2. Measure the resistance according to the value(s) in the table below.
      GTY398420Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Standard Resistance

      Tester Connection Condition Specified Condition
      D60-3 (DOUT) - Body ground Power switch off 10 kΩ or higher
      D60-4 (STBI) - Body ground Power switch off 10 kΩ or higher
      TEXT IN ILLUSTRATION

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

      Standard Voltage

      Tester Connection Condition Specified Condition
      D60-1 (CLK) - Body ground Power switch on (IG) 11 to 14 V
      D60-2 (DIN) - Body ground Power switch on (IG) 11 to 14 V
      D60-3 (DOUT) - Body ground Power switch on (IG) Below 1 V
      D60-4 (STBI) - Body ground Power switch on (IG) Below 1 V
      NOTE:

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

    5. Turn the power switch off.
    6. Reconnect the D60 compressor with motor assembly connector.

    NG → See step   9 

    OK: Go to next step 

  7. CHECK COMPRESSOR WITH MOTOR ASSEMBLY 
    1. Disconnect the A31 power management control ECU connector.
    2. Measure the resistance according to the value(s) in the table below.
      GTY401865Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Standard Resistance

      Tester Connection Condition Specified Condition
      A31-19 (CLK) - Body ground Power switch off 10 kΩ or higher
      A31-31 (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 Condition Specified Condition
      A31-19 (CLK) - Body ground Power switch on (IG) Below 1 V
      A31-20 (STB) - Body ground Power switch on (IG) 11 to 14 V
      A31-30 (ETI) - Body ground Power switch on (IG) 11 to 14 V
      A31-31 (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. Reconnect the A31 power management control ECU connector.

    NG → See step   8 

    OK → See step   9 

  8. REPLACE COMPRESSOR WITH MOTOR ASSEMBLY. Refer to  COMPONENTS [08/2013 - ] 
  9. REPLACE POWER MANAGEMENT CONTROL ECU. Refer to  COMPONENTS [08/2013 - ] 
  10. GO TO DTC CHART (AIR CONDITIONING SYSTEM). Refer to  DIAGNOSTIC TROUBLE CODE CHART [08/2013 - ] 
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