Lexus RX (RX 350L, RX450h) 2016-2024 Repair Manual: Starter Relay Circuit Short to Battery (P061512)

HINT:

• After repair has been completed, clear the DTC and then check that the vehicle has returned to normal by performing the following All Readiness check procedure.

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• When clearing the permanent DTCs, refer to the "CLEAR PERMANENT DTC" procedure.

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1. Connect the Techstream to the DLC3.
2. Turn the engine switch on (IG).
3. Turn the Techstream on.
4. Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure).
5. Turn the engine switch off and wait for at least 30 seconds.
6. Turn the engine switch on (IG) [A].
7. Turn the Techstream on.
8. Start the engine.
9. Idle the engine for 5 seconds or more [B].
10. Drive the vehicle at a speed of 24 km/h (15 mph) or more for 20 seconds or more [C].

    CAUTION:

    When performing the confirmation driving pattern, obey all speed limits and traffic laws.

11. Enter the following menus: Powertrain / Engine / Trouble Codes [D].
12. Read the pending DTCs.

    HINT:

    • If a pending DTC is output, the system is malfunctioning.
    • If a pending DTC is not output, perform the following procedure.
13. Enter the following menus: Powertrain / Engine / Utility / All Readiness.
14. Input the DTC: P061512.
15. Check the DTC judgment result.

    Techstream Display	Description
    NORMAL	DTC judgment completed System normal
    ABNORMAL	DTC judgment completed System abnormal
    INCOMPLETE	DTC judgment not completed Perform driving pattern after confirming DTC enabling conditions

    HINT:

    • If the judgment result is NORMAL, the system is normal.
    • If the judgment result is ABNORMAL, the system has a malfunction.
    • [A] to [D]: Normal judgment procedure.

      The normal judgment procedure is used to complete DTC judgment and also used when clearing permanent DTCs.

    • When clearing the permanent DTCs, do not disconnect the cable from the battery terminal or attempt to clear the DTCs during this procedure, as doing so will clear the universal trip and normal judgment histories.

HINT:

• When the result of the above inspection is "The Data List item "Starter SW" does not change from ON", the ST relay is normal.
• DTCs may be stored during this inspection. Check for DTCs and clear them using the Techstream.

HINT:

• Make a note of the measured voltage as it will be necessary for the inspecting the change in voltage in the next step. As the next step should be conducted under the same conditions, keep the engine switch on (IG) and do not install the ST relay.
• DTCs may be stored during this inspection. Check for DTCs and clear them using the Techstream.
• If any voltage was measured with the engine switch on (IG), one of the following malfunctions is suspected:
  • Short to +B in the circuit of a connected ECU or the switch.
  • Short to +B in the wire harness.

HINT:

• If the voltage is the same before and after disconnecting the connector, the park/neutral position switch assembly is normal.
• DTCs may be stored during this inspection. Check for DTCs and clear them using the Techstream.

HINT:

• If the voltage is the same before and after disconnecting the connector, the ECM is normal.
• DTCs may be stored during this inspection. Check for DTCs and clear them using the Techstream.

Internal Control Module EEPROM Data Memory Failure (P062F44)

DESCRIPTION The ECM monitors its internal operation and stores this DTC when it detects an internal malfunction. DTC No. Detection Item DTC Detection Condition Trouble Area MIL Memory N ...

VIN Not Programmed (P063051)

MONITOR DESCRIPTION DTC P063051 is stored when the Vehicle Identification Number (VIN) is not stored in the ECM or the stored VIN is not accurate. DTC No. Detection Item DTC Detection Condition ...

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