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ELECTRONIC SHIFT LEVER SYSTEM, Diagnostic DTC:P1765A2

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DTC Code DTC Name
P1765A2 Sub Battery Module System Voltage Low
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DESCRIPTION

When the power switch is on (READY) or 5 seconds after turning the power switch on (IG), the sub-battery power source is supplied to the BUB terminal of the shift control ECU.

DTC No. Detection Item DTC Detection Condition Trouble Area Warning Indicate
P1765A2 Sub Battery Module System Voltage Low

The power switch on (READY) and battery voltage is 10 V or higher, BUB terminal voltage (ECU recognition value) is below 1 V continuously for 3 seconds or more

(1 trip detection logic)


  • Sub-battery module assembly

  • Shift control ECU

  • Wire harness or connector


  • Master Warning Light


    • Comes on

  • Multi-information Display Error Message


    • Displayed

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CONFIRMATION DRIVING PATTERN

Tip:

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

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  1. Turn the power switch on (READY) and wait for 5 seconds or more.

Table 1. *a BUB *b P CON MAIN2 *c Sub-battery Module Assembly *d Shift Control ECU
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WIRING DIAGRAM

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CAUTION / NOTICE / HINT

Note:
  • The vehicle is equipped with a sub-battery. Therefore, ensure there is no power being supplied to the vehicle when disconnecting or reconnecting the connector of the shift control ECU and when removing or installing the shift control ECU.

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  • Inspect the fuses for circuits related to this system before performing the following inspection procedure.

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PROCEDURE


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    CHECK CONNECTOR CONNECTION CONDITION (SHIFT CONTROL ECU CONNECTOR)


    1. B004UMOC02
      *1 for LHD *2 for RHD

      Check the connector connections and contact pressure of the relevant terminals for the shift control ECU connectors.

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      OK
      The connectors are connected securely and there are no contact pressure problems.
      Result
      Proceed to
      OK
      NG

  2. Click here

    CHECK SUB-BATTERY MODULE ASSEMBLY VOLTAGE


    1. Disconnect the G81 shift control ECU connector.

    2. Turn the power switch on (IG)

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      G81-10 (BUB) - Body ground 5 seconds after turning the power switch on (IG) 8 to 15.4 V
      Note:
      • Power is supplied from the sub-battery module assembly for only 5 seconds after the power switch is turned on (IG). Therefore, measure the voltage during that time.

      • Turning the power switch on (IG) with the connector disconnected causes other DTCs to be stored. Clear the DTCs after performing this inspection.

    4. Turn the power switch off

    5. Reconnect the G81 shift control ECU connector.

      Result
      Proceed to
      OK
      NG

  3. Click here

    CHECK HARNESS AND CONNECTOR (SHIFT CONTROL ECU - P CON MAIN2 FUSE)


    1. Disconnect the G81 shift control ECU connector.

    2. B004XXWC06
      *1 No. 1 Luggage Room Relay Block Assembly *2 P CON MAIN2 FUSE
      *a

      Front view of wire harness connector

      (to Shift Control ECU)

      - -

      Remove the P CON MAIN2 fuse from the No. 1 luggage room relay block assembly.

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

      Standard Resistance (Check for Open)
      Tester Connection Condition Specified Condition
      P CON MAIN2 fuse terminal 2 - G81-10 (BUB) Always Below 1 Ω
      Standard Resistance (Check for Short)
      Tester Connection Condition Specified Condition
      P CON MAIN2 fuse terminal 2 or G81-10 (BUB) - Body ground Always 10 kΩ or higher
    4. Reconnect the G81 shift control ECU connector.

    5. Install the P CON MAIN2 fuse.

      Result
      Proceed to
      OK
      NG

    • OKClick here
    • NG

      REPAIR OR REPLACE HARNESS OR CONNECTOR

  4. Click here

    CHECK HARNESS AND CONNECTOR (P CON MAIN2 FUSE - SUB-BATTERY MODULE ASSEMBLY)


    1. B004XF1C02
      *1 No. 1 Luggage Room Relay Block Assembly
      *2 P CON MAIN2 Fuse

      Remove the P CON MAIN2 fuse from the No. 1 Luggage Room Relay Block Assembly.

    2. Disconnect the P13 positive (+) terminal from the sub-battery module assembly.

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

      Standard Resistance (Check for Open)
      Tester Connection Condition Specified Condition
      P CON MAIN2 fuse terminal 1 - P13-1 (+BAT) Always Below 1 Ω
      Standard Resistance (Check for Short)
      Tester Connection Condition Specified Condition
      P CON MAIN2 fuse terminal 1 or P13-1 (+BAT) - Body ground Always 10 kΩ or higher
    4. Reconnect the P13 positive (+) terminal to the sub-battery module assembly.

    5. Install the P CON MAIN2 fuse.

      Result
      Proceed to
      OK
      NG

    • OK

      CHECK SUB BATTERY SYSTEMClick here

    • NG

      REPAIR OR REPLACE HARNESS OR CONNECTOR