HYBRID CONTROL SYSTEM, Diagnostic DTC:P0617-142

DTC Code DTC Name
P0617-142 Starter Relay Circuit High

DESCRIPTION

The hybrid vehicle control ECU assembly monitors the ST signal received from the certification ECU (smart key ECU assembly). When an error is detected in the ST signal, this DTC is stored.

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

An ST signal from the hybrid vehicle control ECU assembly is on when the power switch is off.

(2 trip detection logic)

  • Wire harness or connector

  • Hybrid vehicle control ECU assembly

  • Certification ECU (smart key ECU assembly)

 Does not come on

Master Warning Light:

Comes on

WIRING DIAGRAM

A01OC9GE18
*1 Certification ECU (Smart Key ECU Assembly)
*2 Hybrid Vehicle Control ECU Assembly

CAUTION / NOTICE / HINT

Note

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

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 5 seconds or more.

PROCEDURE


  1. CHECK CONNECTOR CONNECTION CONDITION (HYBRID VEHICLE CONTROL ECU ASSEMBLY CONNECTOR)

    Result
    Proceed to
    OK
    NG

    1. Check the connector connections and contact pressure of the relevant terminals for the hybrid vehicle control ECU assembly connectors.

      Click here

      OK
      The connectors are connected securely and there are no contact pressure problems.
      B004GK9C01
      *A for LHD *B for RHD
      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. B004G97C12
      *a

      Component with harness connected

      (Hybrid Vehicle Control ECU Assembly)

      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
      O141-9 (ST2) - Body ground Power switch off Below 1 V
      Result
      Proceed to
      OK
      NG

    OK

    REPLACE HYBRID VEHICLE CONTROL ECU ASSEMBLY Click here

    NG

  4. CHECK HARNESS AND CONNECTOR (HYBRID VEHICLE CONTROL ECU ASSEMBLY - CERTIFICATION ECU [SMART KEY ECU ASSEMBLY])


    1. B004G97C12
      *a

      Component with harness connected

      (Hybrid Vehicle Control ECU Assembly)

      Disconnect the A13 certification ECU (smart key ECU assembly) connector.

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      O141-9 (ST2) - Body ground Power switch off Below 1 V

    3. Reconnect the A13 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