INTELLIGENT PARKING ASSIST SYSTEM, Diagnostic DTC:C1627

DTC Code DTC Name
C1627 Vehicle Height Sensor Voltage is Low or High

DESCRIPTION

The rear height control sensor sub-assembly and headlight leveling ECU assembly (for LED headlight) are connected to the parking assist ECU. The parking assist ECU shares the vehicle height signals received from the rear height control sensor sub-assembly with the lighting system (auto leveling). The headlight leveling ECU assembly (for LED headlight) supplies power to the rear height control sensor sub-assembly via the parking assist ECU. This DTC is stored when the parking assist ECU judges that the power supply voltage for the rear height control sensor sub-assembly is not normal.

DTC No. DTC Detection Condition Trouble Area
C1627

  • Height control sensor voltage is low

  • Height control sensor voltage is high

  • Harness or connector

  • Headlight leveling ECU assembly (for LED Headlight)

  • Parking assist ECU

WIRING DIAGRAM


  1. for LED Headlight

    A0042W0E04

  2. for Halogen Headlight

    A0042GBE06

INSPECTION PROCEDURE

Note


  • When the "System initializing" message is displayed on the navigation ECU sub-assembly after the auxiliary battery cable has been disconnected, correct the steering angle neutral point Click here.

  • Depending on the parts that are replaced or operations that are performed during vehicle inspection or maintenance, calibration of other systems as well as the intelligent parking assist system may be needed Click here.

  • When the headlight leveling ECU assembly (for LED headlight) is replaced, perform initialization for the lighting system Click here

  • If initialization is necessary while performing an inspection, perform initialization first and then proceed to the next step.

PROCEDURE


  1. CHECK DTC OUTPUT


    1. Clear the DTCs Click here.

    2. Check for DTCs Click here.

      Result
      Result Proceed to
      DTC C1627 is output A
      DTCs are not output B

      Tech Tips


      • If the power source voltage output by the headlight leveling ECU assembly (for LED headlight) is abnormal, the headlight leveling warning light may come on.

      • If the DTCs are not output again when rechecking for DTCs, it may have been stored due to a temporarily abnormal voltage.

      • If DTC C1627 is output frequently, duplicate the problem symptoms and perform the inspection again, even though the DTCs are not output when rechecking for DTCs Click here.


    B

    USE SIMULATION METHOD TO CHECK Click here

    A

  2. CHECK VEHICLE SPECIFICATION


    1. Check vehicle specifications.

      Result
      Result Proceed to
      for LED Headlight A
      for Halogen Headlight B

    B

    CHECK HARNESS AND CONNECTOR (REAR HEIGHT CONTROL SENSOR SUB-ASSEMBLY - PARKING ASSIST ECU) Click here

    A

  3. CHECK HARNESS AND CONNECTOR (HEADLIGHT LEVELING ECU ASSEMBLY - PARKING ASSIST ECU)


    1. Disconnect the A63 headlight leveling ECU assembly connector.

    2. Disconnect the L59 parking assist ECU connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      A63-12 (SBR) - Body ground Always 10 kΩ or higher
      A63-21 (SGR) - Body ground Always 10 kΩ or higher
      A63-12 (SBR) - L59-28 (HB+) Always Below 1 Ω
      A63-21 (SGR) - L59-29 (HGND) Always Below 1 Ω

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  4. CHECK HEADLIGHT LEVELING ECU ASSEMBLY


    1. Reconnect the A63 headlight leveling ECU assembly connector.

    2. Disconnect the L59 parking assist ECU connector.

    3. A0042O4E17
      Text in Illustration
      *a

      Front view of wire harness connector

      (to Parking Assist ECU)

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      L59-28 (HB+) - L59-29 (HGND) Power switch on (IG) 4.75 to 5.25 V

    NG

    REPLACE HEADLIGHT LEVELING ECU ASSEMBLY Click here

    OK

  5. CHECK HARNESS AND CONNECTOR (REAR HEIGHT CONTROL SENSOR SUB-ASSEMBLY - PARKING ASSIST ECU)


    1. Disconnect the L59 parking assist ECU connector.

    2. Disconnect the S2 rear height control sensor sub-assembly connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      L59-27 (HBL+) - Body ground Always 10 kΩ or higher
      L59-31 (HG1) - Body ground Always 10 kΩ or higher
      L59-27 (HBL+) - S2-3 (SHB) Always Below 1 Ω
      L59-31 (HG1) - S2-1 (SHG) Always Below 1 Ω
      Result
      Result Proceed to
      NG A
      OK B

    B

    CHECK PARKING ASSIST ECU Click here

    A

    REPAIR OR REPLACE HARNESS OR CONNECTOR

  6. CHECK HARNESS AND CONNECTOR (REAR HEIGHT CONTROL SENSOR SUB-ASSEMBLY - PARKING ASSIST ECU)


    1. Disconnect the L59 parking assist ECU connector.

    2. Disconnect the S2 rear height control sensor sub-assembly connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      L59-30 (HBE+) - Body ground Always 10 kΩ or higher
      L59-31 (HG1) - Body ground Always 10 kΩ or higher
      L59-30 (HBE+) - S2-3 (SHB) Always Below 1 Ω
      L59-31 (HG1) - S2-1 (SHG) Always Below 1 Ω

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  7. CHECK PARKING ASSIST ECU


    1. Reconnect the L59 parking assist ECU connector.

    2. Disconnect the S2 rear height control sensor sub-assembly connector.

    3. A0040YGE04
      Text in Illustration
      *a

      Front view of wire harness connector

      (to Rear Height Control Sensor Sub-assembly)

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      S2-3 (SHB) - S2-1 (SHG) Power switch on (IG) 4.75 to 5.25 V

    NG

    REPLACE PARKING ASSIST ECU Click here

    OK

    REPLACE REAR HEIGHT CONTROL SENSOR SUB-ASSEMBLY Click here