MOTOR GENERATOR CONTROL SYSTEM, Diagnostic DTC:P1CB746

DTC Code DTC Name
P1CB746 Generator Control Module(EEPRM Backup Power) Calibration / Parameter Memory Failure

DESCRIPTION

The inverter with converter assembly monitors its internal operation and will store this DTC if it detects a malfunction in its EEPROM.

DTC No. Detection Item DTC Detection Condition Trouble Area MIL Warning Indicate
P1CB746 Generator Control Module(EEPRM Backup Power) Calibration / Parameter Memory Failure

ECU internal malfunction

(EEPROM error)

(2 trip detection logic)

 Inverter with converter assembly Does not come on

Master Warning Light:

Comes on

CONFIRMATION DRIVING PATTERN

Tech Tips

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.

Click here


  1. Connect the GTS to the DLC3.

  2. Turn the power switch on (IG) and turn the GTS on.

  3. Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure).

  4. Turn the power switch off and wait for 2 minutes or more.

  5. Turn the power switch on (IG) and turn the GTS on.

  6. With power switch on (IG) and wait for 5 seconds or more.

  7. Turn the power switch off and wait for 2 minutes or more.

  8. Turn the power switch on (IG) and wait for 5 seconds or more.

  9. Enter the following menus: Powertrain / Motor Generator / Utility / All Readiness.

  10. Check the DTC judgment result.

    Tech Tips


    • If the judgment result shows NORMAL, the system is normal.

    • If the judgment result shows ABNORMAL, the system has a malfunction.

    • If the judgment result shows INCOMPLETE or N/A, perform driving pattern again.

PROCEDURE


  1. CHECK DTC OUTPUT


    1. Connect the GTS to the DLC3.

    2. Turn the power switch on (IG).

    3. Enter the following menus: Powertrain / Motor Generator / Trouble Codes.

    4. Check if DTCs are output.


      Powertrain > Motor Generator > Trouble Codes
      Result
      Result Proceed to
      Pending DTC P1CB746 is output. A
      Current DTC P1CB746 is output. B

    5. Turn the power switch off.


    B

    GO TO STEP 3 Click here

    A

  2. CHECK DTC OUTPUT (SIMULATION TEST)


    1. Connect the GTS to the DLC3.

    2. Turn the power switch off and wait for 2 minutes or more.

    3. Turn the power switch on (IG) and wait for 5 seconds or more.

    4. Enter the following menus: Powertrain / Motor Generator / Trouble Codes.

    5. Check if DTCs are output.


      Powertrain > Motor Generator > Trouble Codes
      Result
      Result Proceed to
      Current DTC P1CB746 is output. A
      Current DTC P1CB746 is not output. B

    6. Turn the power switch off.


    B

    COMPLETED

    A

  3. CHECK AUXILIARY BATTERY TERMINAL (CONTACT PROBLEM)


    1. Check the connection of the negative (-) and positive (+) auxiliary battery terminals.

      OK
      The terminals are connected securely and there is no contact problem.
      Result
      Proceed to
      OK
      NG

    NG

    CONNECT SECURELY

    OK

  4. CHECK AUXILIARY BATTERY VOLTAGE


    1. Turn the power switch off and turn on the high beam headlights for 30 seconds. This will remove the surface charge from the auxiliary battery.

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      Positive (+) auxiliary battery terminal - Negative (-) auxiliary battery terminal 20°C (68°F), Power switch off 11.0 V or higher
      Result
      Proceed to
      OK
      NG

    OK

    REFER TO REPLACE INVERTER WITH CONVERTER ASSEMBLY PARTS Click here

    NG

    CHARGE AUXILIARY BATTERY