ECD SYSTEM, Diagnostic DTC:P1602

DTC Code DTC Name
P1602 Open, Short to B+ or Short to GND in Glow Lamp Circuit

DESCRIPTION

During a cold engine start, the ECM starts to apply current to the glow plug, and the glow indicator light simultaneously comes on.

DTC No. DTC Detection Condition Trouble Area Possible to Detect
Ignition Switch Engine Run
P1602 Glow indicator light circuit malfunction

  • Glow indicator light

  • Glow indicator light circuit

  • ECM

 ON ON

FAIL-SAFE

DTC No. Fail-safe Operation Fail-safe Deactivation Condition
P1602 - -

WIRING DIAGRAM

A0136HFE01

INSPECTION PROCEDURE

Tech Tips


  • If the ECM is replaced, variant coding (variant coding indicates the presence of vehicle accessory items, A/C, etc.) should always be performed Click here.

  • Before removing the ECM and the peripheral parts, wait at least 3 minute after turning the ignition switch off (If the cooling fan is operating, remove the ECM and the peripheral parts after the fan stops.).

PROCEDURE


  1. INSPECT GLOW INDICATOR LIGHT (VOLTAGE)


    1. A0138H5E01

      Disconnect the 3H instrument panel J/B connector.

    2. Turn the ignition switch to the ON position.

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

      Standard voltage
      Tester Connection Specified Condition
      Instrument panel J/B (3H-9) - Body ground 11 to 14 V

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR (BATTERY - INSTRUMENT PANEL J/B)

    OK

  2. CHECK HARNESS AND CONNECTOR (COMBINATION METER - ECM)


    1. A0138CRE02

      Disconnect the B54 ECM connector.

    2. Disconnect the A22 combination meter connector.

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

      Standard resistance
      Check for open
      Tester Connection Specified Condition
      G1ND (B54-16) - Combination meter (A22-9) Below 1 Ω
      Check for short
      Tester Connection Specified Condition
      G1ND (B54-16) or Combination meter (A22-9) - Body ground 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  3. REPLACE COMBINATION METER


    NEXT

  4. CHECK IF DTC RECURS (P1602)


    1. Connect the intelligent tester to the DLC3.

    2. Clear the DTC Click here.

    3. Turn the ignition switch to the ON position and turn the intelligent tester on.

    4. Select the following menu items: Powertrain / Engine and ECT / DTC.

    5. Read the DTCs displayed on the intelligent tester.

      Result
      Display (DTC output) Proceed To
      No output A
      P1602 B

    B

    REPLACE ECM

    A

    END