ECD SYSTEM Pre-heating Control Circuit

DESCRIPTION

When the ignition switch turns ON, the ECM calculates the glow indicator lighting time/heating corresponding to the coolant temperature at that time and turns on the glow indicator light/glow plug relay.

As the ceramics is used for a glow plug material, the current control is not performed.

A01BECSE01

WIRING DIAGRAM

A01BCV0E01

INSPECTION PROCEDURE

PROCEDURE


  1. CHECK GLOW INDICATOR LIGHT


    1. Turn the ignition switch ON.

    2. Check that the glow indicator light comes on.

      OK
      The glow indicator light remains on for 0.5 sec. or more and then goes off.

    NG

    INSPECT ECM (CHECK VOLTAGE) Click here

    OK

  2. INSPECT GLOW PLUG (INSTALLATION)


    1. Check that the glow plug and glow plug wire are securely installed.

      OK
      The glow plug and glow plug wire are securely installed.

    NG

    TIGHTEN GLOW PLUG

    OK

  3. INSPECT GLOW PLUG


    1. A01BBVOE01

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

      Standard resistance
      0.72 Ω at 20°C (68°F)

      Tech Tips

      The higher the temperature is the smaller the resistance becomes and vice versa.


    NG

    REPLACE GLOW PLUG

    OK

  4. CHECK FOR INDICATOR LIGHTING TIME AND AFTER GLOW TIME


    NG

    REPLACE ECM

    OK

  5. READ OUTPUT DTC


    1. Read the DTC Click here.

      Result
      DTC is not output A
      DTC is output B

    B

    GO TO RELEVANT DTC CHART

    A

  6. INSPECT GLOW PLUG RELAY


    1. A01BF57E01

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

      Standard resistance
      Tester Connection Specified Condition
      3 - 5

      10 kΩ or higher

      (No continuity)
      3 - 5

      Below 1 Ω

      (Apply B+ between terminals 1 and 2)

    NG

    REPLACE GLOW PLUG RELAY

    OK

  7. INSPECT ECM (CHECK VOLTAGE)


    1. A01BCNHE14

      Turn the ignition switch to the START position.

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

      Standard voltage
      Tester Connection Connection Specified Condition
      SREL (B10-2) - E1 (D2-14) Cranking 9 to 14 V

    NG

    REPLACE ECM

    OK

  8. CHECK HARNESS AND CONNECTOR (ECM - GLOW PLUG RELAY, GLOW PLUG RELAY - BODY GROUND)


    1. A01BI4BE02

      Disconnect the B10 ECM connector.

    2. Disconnect the glow plug relay from the engine room R/B & J/B No.1.

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

      Standard resistance (Check for open)
      Tester Connection Specified Condition
      (GLOW relay terminal 2 of R/B) - SREL (B10-2) Below 1 Ω
      (GLOW relay terminal 1 of R/B) - Body ground Below 1 Ω
      Standard resistance (Check for short)
      Tester Connection Specified Condition
      SREL (B10-2) - Body ground 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  9. CHECK HARNESS AND CONNECTOR (GLOW PLUG RELAY - GLOW PLUG, GLOW PLUG RELAY - BATTERY)


    1. A01BEJOE02

      Disconnect the battery negative cable.

    2. Disconnect the battery positive cable.

    3. Remove the glow plug relay from the engine room R/B & J/B No. 1.

    4. Disconnect the glow plug wire.

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

      Standard resistance (Check for open)
      Tester Connection Specified Condition
      (Glow plug relay terminal 3 of R/B) - Glow plug wire Below 1 Ω
      (Glow plug relay terminal 5 of R/B) - Positive terminal of the battery Below 1 Ω

      Note

      After reconnecting the battery cable, the radio and clock should be adjusted as they were previously.


    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

    PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE

  10. INSPECT ECM (CHECK VOLTAGE)


    1. A01BD1TE01

      Disconnect the B8 ECM connector.

    2. Turn the ignition switch ON.

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

      Standard voltage
      Tester Connection Specified Condition
      GIND (B8-1) - E1 (D2-14) 9 to 14 V

    NG

    INSPECT COMBINATION METER (CHECK VOLTAGE) Click here

    OK

    REPLACE ECM

  11. INSPECT COMBINATION METER (CHECK VOLTAGE)


    1. A01BHO7E01

      Disconnect the combination meter connector.

    2. Turn the ignition switch ON.

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

      Standard voltage
      Tester Connection Specified Condition
      L (H20-25) - Body ground 9 to 14 V

    NG

    INSPECT COMBINATION METER (CHECK VOLTAGE) Click here

    OK

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


    1. A01BFHKE01

      Disconnect the B8 ECM connector.

    2. Disconnect the combination meter connector.

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

      Standard resistance
      Tester Connection Specified Condition
      L (H20-25) - GIND (B8-1) Below 1 Ω

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

    CHECK FOR INTERMITTENT PROBLEMS

  13. INSPECT COMBINATION METER (CHECK VOLTAGE)


    1. A01BHO7E03

      Disconnect the combination meter connector.

    2. Turn the ignition switch ON.

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

      Standard voltage
      Tester Connection Specified Condition
      IG+ (H20-6) - Body ground 9 to 14 V

    NG

    CHECK FUSE (MET IGN FUSE) Click here

    OK

    REPLACE COMBINATION METER

  14. CHECK FUSE (MET IGN FUSE)


    1. A01BC34E01

      Remove the MET IGN fuse from the instrument panel J/B.

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

      Standard resistance
      Tester Connection Specified Condition
      MET IGN fuse Below 1 Ω (Continuity)

    NG

    REPLACE FUSE (MET IGN FUSE)

    OK

  15. CHECK HARNESS AND CONNECTOR (ECM - COMBINATION METER, COMBINATION METER - GAUGE FUSE)


    1. A01BBPJE01

      Disconnect the combination meter connector.

    2. Remove the MET IGN fuse from the instrument panel J/B.

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

      Standard resistance (Check for open)
      Tester Connection Specified Condition
      (MET IGN fuse terminal 1 of J/B ) - IG+ (H20-6) Below 1 Ω

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

    CHECK AND REPLACE HARNESS AND CONNECTOR (MET IGN FUSE - BATTERY)