HYBRID CONTROL SYSTEM, Diagnostic DTC:P3108-536

DTC Code DTC Name
P3108-536 Lost Communication with A/C System Control Module

DESCRIPTION

The EV control ECU detects a wiring malfunction in the serial communication line between it and the compressor with motor assembly.

DTC No. Detection Item DTC Detection Condition Trouble Area Warning Indicate
P3108-536 Lost Communication with A/C System Control Module

Communication error (air conditioning system to hybrid control system):

Error in communication data from the A/C inverter.

Although an air conditioning inverter shutdown signal is sent, the air conditioning inverter does not shutdown.

(1 trip detection logic)

  • Wire harness or connector

  • Compressor with motor assembly

  • EV control ECU

Master Warning Light:

Does not come on
Related Data List
DTC No. Data List
P3108-536

  • A/C Consumption Power

  • A/C Inverter Shutdown Request

WIRING DIAGRAM

A01MIZUE01
*a from IG1 NO.4 Relay
*b Compressor with Motor Assembly
*c EV Control ECU

CAUTION / NOTICE / HINT

Note

When the vehicle is parked with the power switch off, if the FC control ECU judges that the FC stack temperature will go below 0°C (32°F), it activates the FC air compressor, hydrogen pump and FC cooling water pump for a maximum of 180 seconds and drains water from the FC stack assembly. When performing inspection or repairs with the power switch off (not on (IG) or on (READY)), disconnect the cable from the negative (-) auxiliary battery terminal before performing work (If the auxiliary battery voltage is needed to conduct inspection, warm up the FC system beforehand).

Tech Tips

After the repair, clear the DTCs and perform the following procedure to check that DTCs are not output.


  1. Wait for 30 seconds or more with the power switch on (READY) and the air conditioning turned off.

  2. Turn the air conditioning on and wait for 30 seconds or more.

PROCEDURE


  1. CHECK DTC OUTPUT (AIR CONDITIONER)


    1. Connect the GTS 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.


      Body Electrical > Air Conditioner > Trouble Codes
      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

    GO TO DTC CHART (AIR CONDITIONING SYSTEM) Click here

    A

  2. CHECK CONNECTOR CONNECTION CONDITION (EV CONTROL ECU CONNECTOR)

    Result
    Proceed to
    OK
    NG

    1. A01MGTOC01
      *A for LHD
      *B for RHD

      Check the connector connections and contact pressure of the relevant terminals for the EV control ECU connectors.

      Click here

      OK
      The connectors are connected securely and there are no contact pressure problems.
      Result
      Proceed to
      OK
      NG

    NG

    CONNECT SECURELY

    OK

  3. CHECK CONNECTOR CONNECTION CONDITION (COMPRESSOR WITH MOTOR ASSEMBLY CONNECTOR)


    1. A01MG1T

      Check the connection of the compressor with motor assembly connector.

      OK
      The connector is connected securely and there are no contact problems.
      Result
      Proceed to
      OK
      NG

    NG

    CONNECT SECURELY

    OK

  4. CHECK HARNESS AND CONNECTOR (COMPRESSOR WITH MOTOR ASSEMBLY POWER SOURCE CIRCUIT)


    1. Disconnect the compressor with motor assembly connector.

    2. A01MG4SC70
      *a

      Front view of wire harness connector

      (to Compressor with Motor Assembly)

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      D2-5 (GND) - Body ground Power switch off Below 1 Ω

    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
      D2-6 (IG1) - D2-5 (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 compressor with motor assembly connector.

      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  5. CHECK HARNESS AND CONNECTOR (EV CONTROL ECU - COMPRESSOR WITH MOTOR ASSEMBLY)


    1. Disconnect the EV control ECU connector.

    2. Disconnect the compressor with motor assembly connector.

    3. Turn the power switch on (IG).

    4. A01MGDDC35
      *a

      Rear view of wire harness connector

      (to EV control ECU)
      *b

      Front view of wire harness connector

      (to Compressor with Motor Assembly)

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      A27-10 (CLK) - Body ground Power switch on (IG) Below 1 V
      A27-9 (ITE) - Body ground Power switch on (IG) Below 1 V
      A27-8 (ETI) - Body ground Power switch on (IG) Below 1 V
      A27-11 (STB) - Body ground Power switch on (IG) Below 1 V

      Note

      Turning the power switch on (IG) with the EV 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
      Tester Connection Condition Specified Condition
      A27-10 (CLK) - D2-1 (CLK) Power switch off Below 1 Ω
      A27-9 (ITE) - D2-2 (DIN) Power switch off Below 1 Ω
      A27-8 (ETI) - D2-3 (DOUT) Power switch off Below 1 Ω
      A27-11 (STB) - D2-4 (STBI) Power switch off Below 1 Ω
      A27-10 (CLK) or D2-1 (CLK) - Body ground and other terminals Power switch off 10 kΩ or higher
      A27-9 (ITE) or D2-2 (DIN) - Body ground and other terminals Power switch off 10 kΩ or higher
      A27-8 (ETI) or D2-3 (DOUT) - Body ground and other terminals Power switch off 10 kΩ or higher
      A27-11 (STB) or D2-4 (STBI) - Body ground and other terminals Power switch off 10 kΩ or higher

    7. Reconnect the compressor with motor assembly connector.

    8. Reconnect the EV control ECU connector.

      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  6. CHECK EV CONTROL ECU


    1. Disconnect the compressor with motor assembly connector.

    2. A01MG4SC71
      *a

      Front view of wire harness connector

      (to Compressor with Motor Assembly)

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      D2-3 (DOUT) - Body ground Power switch off 10 kΩ or higher
      D2-4 (STBI) - Body ground Power switch off 10 kΩ or higher

    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
      D2-1 (CLK) - Body ground Power switch on (IG) 11 to 14 V
      D2-2 (DIN) - Body ground Power switch on (IG) 11 to 14 V
      D2-3 (DOUT) - Body ground Power switch on (IG) Below 1 V
      D2-4 (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 compressor with motor assembly connector.

      Result
      Proceed to
      OK
      NG

    NG

    REPLACE EV CONTROL ECU Click here

    OK

  7. CHECK COMPRESSOR WITH MOTOR ASSEMBLY


    1. Disconnect the EV control ECU connector.

    2. A01MIK1C95
      *a

      Rear view of wire harness connector

      (to EV Control ECU)

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      A27-10 (CLK) - Body ground Power switch off 10 kΩ or higher
      A27-9 (ITE) - Body ground Power switch off 10 kΩ or higher

    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
      A27-10 (CLK) - Body ground Power switch on (IG) Below 1 V
      A27-9 (ITE) - Body ground Power switch on (IG) Below 1 V
      A27-8 (ETI) - Body ground Power switch on (IG) 11 to 14 V
      A27-11 (STB) - Body ground Power switch on (IG) 11 to 14 V

      Note

      Turning the power switch on (IG) with the EV 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 EV control ECU connector.

      Result
      Proceed to
      OK
      NG

    OK

    REPLACE EV CONTROL ECU Click here

    NG

    REPLACE COMPRESSOR WITH MOTOR ASSEMBLY Click here