DTC    P3108-535    A/C Amplifier Communication Circuit Malfunction

DTC    P3108-536    A/C Amplifier Communication Circuit Malfunction

DTC    P3108-538    A/C Amplifier Communication Circuit Malfunction

for Preparation Click here


DESCRIPTION

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

DTC No.
INF Code
DTC Detection Condition
Trouble Area
P3108
535
Serial communication malfunction
  1. Wire harness or connector
  2. With motor compressor assembly
P3108
536
A/C inverter malfunction
  1. Wire harness or connector
  2. With motor compressor assembly
P3108
538
Open in STB signal circuit
  1. Wire harness or connector
  2. With motor compressor assembly

WIRING DIAGRAM


A144928E02


INSPECTION PROCEDURE

CAUTION:
  1. Before inspecting the high-voltage system or disconnecting the low voltage connector of the inverter with converter assembly, take safety precautions such as wearing insulated gloves and removing the service plug grip to prevent electrical shocks. After removing the service plug grip, put it in your pocket to prevent other technicians from accidentally reconnecting it while you are working on the high-voltage system.
  2. After disconnecting the service plug grip, wait for at least 10 minutes before touching any of the high-voltage connectors or terminals. After waiting, check the voltage at the inspection point in the inverter with converter assembly. The voltage should be 0 V before beginning work.

HINT:
Waiting for at least 10 minutes is required to discharge the high-voltage capacitor inside the inverter with converter assembly.

1.CHECK DTC OUTPUT (HV)
  1. Connect the intelligent tester to the DLC3.

  1. Turn the power switch on (IG).

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

  1. Read output DTCs.

    Result:

    DTC No.
    Relevant Diagnosis
    P0ADC-226
    SMRB circuit
    P0AE0-228
    SMRG circuit

    HINT:
    DTC P3108-535 may be stored due to an open circuit in the SMRB circuit or SMRG circuit.



YES
GO TO DTC CHART
NO


2.CHECK CONNECTOR CONNECTION CONDITION (HYBRID VEHICLE CONTROL ECU CONNECTOR)


    A131207E01
  1. Check the connection of the hybrid vehicle control ECU connector.

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



NG
CONNECT SECURELY
OK


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


    A138226E01
  1. Check the connection of the with motor compressor assembly connector.

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



NG
CONNECT SECURELY
OK


4.CHECK HARNESS AND CONNECTOR (WITH MOTOR COMPRESSOR ASSEMBLY POWER SOURCE CIRCUIT)
  1. Turn the power switch off.



    A143690E01
  1. Disconnect connector E78 from the with motor compressor assembly.

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

    Standard resistance (Check for open):
    Tester Connection
    Specified Condition
    GND (E78-5) - Body ground
    Below 1 Ω

  1. Turn the power switch on (IG).

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

    Standard voltage:
    Tester Connection
    Specified Condition
    IG (E78-6) - GND (E78-5)
    Below 1 V

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



NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK


5.CHECK DTC OUTPUT (HV)
  1. Connect the with motor compressor assembly connector.

  1. Connect the intelligent tester to the DLC3.

  1. Turn the power switch on (IG).

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

  1. Read output DTCs.

    Result:

    DTC No.
    Proceed to
    P3108-535 is not output only.
    A
    P3108-535 is not output and P3108-538 is output.
    B
    P3108-538 is not output and P3108-536 is output.
    A



B
Go to step 9
A


6.CHECK HARNESS AND CONNECTOR (HYBRID VEHICLE CONTROL ECU - WITH MOTOR COMPRESSOR ASSEMBLY)


    A138206E08
  1. Disconnect connector E77 from the hybrid vehicle control ECU.

  1. Disconnect connector E78 from the with motor compressor assembly (Click here).

  1. Turn the power switch on (IG).

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

    Standard voltage:
    Tester Connection
    Specified Condition
    CLK (E77-9) - Body ground
    Below 1 V
    ITE (E77-10) - Body ground
    Below 1 V
    ETI (E77-11) - Body ground
    Below 1 V

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

  1. Turn the power switch off.

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

    Standard resistance (Check for open):
    Tester Connection
    Specified Condition
    CLK (E77-9) - CLK (E78-1)
    Below 1 Ω
    ITE (E77-10) - DIM (E78-2)
    Below 1 Ω
    ETI (E77-11) - DOUT (E78-3)
    Below 1 Ω

    Standard resistance (Check for short):
    Tester Connection
    Specified Condition
    CLK (E77-9) or CLK (E78-1) - Body ground
    10 kΩ or more
    ITE (E77-10) or DIM (E78-2) - Body ground
    10 kΩ or more
    ETI (E77-11) or DOUT (E78-3) - Body ground
    10 kΩ or more



NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK


7.CHECK HYBRID VEHICLE CONTROL ECU
  1. Turn the power switch off.

  1. Connect the connector to the hybrid vehicle control ECU.



    A141864E09
  1. Measure the resistance according to the value(s) in the table below.

    Standard resistance:
    Tester Connection
    Specified Condition
    DOUT (E78-3) - Body ground
    10 kΩ or more

  1. Turn the power switch on (IG).

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

    Standard voltage:
    Tester Connection
    Specified Condition
    CLK (E78-1) - Body ground
    10 to 14 V
    DIM (E78-2) - Body ground
    10 to 14 V
    DOUT (E78-3) - Body ground
    Below 1 V

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



NG
REPLACE HYBRID VEHICLE CONTROL ECU (Click here)
OK


8.CHECK WITH MOTOR COMPRESSOR ASSEMBLY
  1. Turn the power switch off.

  1. Connect the connector to the with motor compressor assembly.

  1. Disconnect connector E77 from the hybrid vehicle control ECU.



    A131158E28
  1. Measure the resistance according to the value(s) in the table below.

    Standard resistance:
    Tester Connection
    Specified Condition
    CLK (E77-9) - Body ground
    10 kΩ or more
    ITE (E77-10) - Body ground
    10 kΩ or more

  1. Turn the power switch on (IG).

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

    Standard voltage:
    Tester Connection
    Specified Condition
    ETI (E77-11) - Body ground
    10 to 14 V
    CLK (E77-9) - Body ground
    Below 1 V
    ITE (E77-10) - Body ground
    Below 1 V

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



NG
REPLACE WITH MOTOR COMPRESSOR ASSEMBLY
OK

REPLACE HYBRID VEHICLE CONTROL ECU (Click here)  

9.CHECK HARNESS AND CONNECTOR (HYBRID VEHICLE CONTROL ECU - WITH MOTOR COMPRESSOR ASSEMBLY)


    A138206E09
  1. Disconnect connector E77 from the hybrid vehicle control ECU.

  1. Disconnect connector E78 from the with motor compressor assembly.

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

    Standard voltage:
    Tester Connection
    Specified Condition
    STB (E77-8) - Body ground
    Below 1 V

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

  1. Turn the power switch off.

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

    Standard resistance (Check for open):
    Tester Connection
    Specified Condition
    STB (E77-8) - STBI (E78-4)
    Below 1 Ω

    Standard resistance (Check for short):
    Tester Connection
    Specified Condition
    STB (E77-8) or STBI (E78-4) - Body ground
    10 kΩ or more



NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK


10.CHECK HYBRID VEHICLE CONTROL ECU
  1. Turn the power switch off.

  1. Connect the connector to the hybrid vehicle control ECU.



    A141864E10
  1. Measure the resistance according to the value(s) in the table below.

    Standard resistance:
    Tester Connection
    Specified Condition
    STBI (E78-4) - Body ground
    10 kΩ or more

  1. Turn the power switch on (IG).

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

    Standard voltage:
    Tester Connection
    Specified Condition
    STBI (E78-4) - Body ground
    Below 1 V

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



NG
REPLACE HYBRID VEHICLE CONTROL ECU (Click here)
OK


11.CHECK WITH MOTOR COMPRESSOR ASSEMBLY
  1. Turn the power switch off.

  1. Connect the connector to the with motor compressor assembly.



    A131158E29
  1. Disconnect connector E77 from the hybrid vehicle control ECU.

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

    Standard resistance:
    Tester Connection
    Specified Condition
    STB (E77-8) - Body ground
    10 kΩ or more

  1. Turn the power switch on (IG).

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

    Standard voltage:
    Tester Connection
    Specified Condition
    STB (E77-8) - Body ground
    10 to 14 V

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



NG
REPLACE WITH MOTOR COMPRESSOR ASSEMBLY
OK

REPLACE HYBRID VEHICLE CONTROL ECU (Click here)