HYBRID CONTROL SYSTEM, Diagnostic DTC:P0617-142

DTC Code DTC Name
P0617-142 Starter Relay Circuit High

DESCRIPTION

DTC No. Detection Item DTC Detection Condition Trouble Area Warning Indicate
P0617-142 Starter Relay Circuit High

An ST signal from the EV control ECU is on when the power switch is off.

(2 trip detection logic)

  • Wire harness or connector

  • EV control ECU

  • Certification ECU (smart key ECU assembly)

Master Warning Light:

Comes on

WIRING DIAGRAM

A01MJ4AE13
*1 Certification ECU (Smart Key ECU Assembly)
*2 EV Control ECU

CAUTION / NOTICE / HINT

Note


  • Before replacing the certification ECU (smart key ECU assembly), refer to Service Bulletin.

  • 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. Turn the power switch off and wait for 3 minutes or more.

  2. Turn the power switch on (IG).

  3. Turn the power switch off and wait for 3 minutes or more.

PROCEDURE


  1. 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

  2. CHECK CONNECTOR CONNECTION CONDITION (CERTIFICATION ECU (SMART KEY ECU ASSEMBLY))


    1. Check the connector connection condition of the certification ECU (smart key ECU assembly).

      Tech Tips

      Refer to the Service Bulletin for the installation position.

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

    NG

    CONNECT SECURELY

    OK

  3. CHECK HARNESS AND CONNECTOR (ST2 TERMINAL VOLTAGE)


    1. A01MIXUC01
      *a

      Component with harness connected

      (EV Control ECU)

      Turn the power switch off.

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      G45-9 (ST2) - Body ground Power switch off Below 1 V
      Result
      Proceed to
      OK
      NG

    OK

    REPLACE EV CONTROL ECU Click here

    NG

  4. CHECK HARNESS AND CONNECTOR (EV CONTROL ECU - CERTIFICATION ECU (SMART KEY ECU ASSEMBLY))


    1. A01MIXUC01
      *a

      Component with harness connected

      (EV Control ECU)

      Disconnect the G40 certification ECU (smart key ECU assembly) connector.

      Tech Tips

      Refer to the Service Bulletin for the installation position.

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      G45-9 (ST2) - Body ground Power switch off Below 1 V

    3. Reconnect the certification ECU (smart key ECU assembly) connector.

      Result
      Proceed to
      OK
      NG

    OK

    REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR