Ecd System Pre-Heating Control Circuit

DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

CHECK GLOW INDICATOR LIGHT

CHECK GLOW PLUG (INSTALLATION)

INSPECT GLOW PLUG

CHECK FOR INDICATOR LIGHTING TIME AND AFTER GLOW TIME

READ OUTPUT DTC

INSPECT GLOW RELAY

CHECK ECM (SREL VOLTAGE)

CHECK HARNESS AND CONNECTOR (GLOW RELAY - ECM AND BODY GROUND)

CHECK HARNESS AND CONNECTOR (GLOW RELAY - GLOW PLUG AND BATTERY)

CHECK ECM (GIND VOLTAGE)

CHECK HARNESS AND CONNECTOR (ECM - COMBINATION METER)

CHECK FUSE (MET)

CHECK HARNESS AND CONNECTOR (COMBINATION METER - BATTERY)

DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

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 seconds or more and then goes off.
   

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

   OK:

   The glow plug and glow plug wire are securely installed.
   

1. Measure the resistance of the glow plug.
   

   Standard resistance:

   0.72 Ω at 20°C (68°F)
   

   HINT:

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

1. Read the DTC (Toyota Fortuner RM000000VR6004X.html).
   

   Result:

   Result	Proceed to
   DTC is not output	A
   DTC is output	B

1. Measure the resistance of the glow relay.
   

   Standard resistance:

   Tester Connection	Specified Condition
   3 - 5	10 kΩ or higher (No continuity)
   3 - 5	Below 1 Ω (when battery voltage is applied to terminals 1 and 2)

1. Turn the ignition switch to the START position.
   

2. Measure the voltage of the ECM connector.
   

   Standard voltage:

   Tester Connection	Condition	Specified Condition
   E23-2 (SREL) - E20-14 (E1)	Cranking	9 to 14 V

1. Disconnect the E23 ECM connector.
   

2. Disconnect the glow relay from the engine room relay block.
   

3. Measure the resistance of the wire harness side connectors.
   

   Standard resistance:

   Tester Connection	Specified Condition
   E23-2 (SREL) - Relay block glow relay terminal 2	Below 1 Ω
   Relay block glow relay terminal 1 - Body ground	Below 1 Ω
   E23-2 (SREL) or relay block glow relay terminal 2 - Body ground	10 kΩ or higher

1. Disconnect the battery negative (-) cable.
   

2. Disconnect the battery positive (+) cable.
   

3. Remove the glow relay from the engine room relay block.
   

4. Disconnect the glow plug wire.
   

5. Measure the resistance of the wire harness side connectors.
   

   Standard resistance:

   Tester Connection	Specified Condition
   Relay block glow relay terminal 3 - Glow plug wire	Below 1 Ω
   Relay block glow relay terminal 5 - Battery positive (+) terminal	Below 1 Ω

   NOTICE:

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

1. Disconnect the E22 ECM connector.
   

2. Turn the ignition switch ON.
   

3. Measure the voltage of the wire harness side connectors.
   

   Standard voltage:

   Tester Connection	Specified Condition
   E22-1 (GIND) - E20-14 (E1)	9 to 14 V

1. Disconnect the C10 combination meter connector.
   

2. Disconnect the E22 ECM connector.
   

3. Measure the resistance of the wire harness side connectors.
   

   Standard resistance:

   Tester Connection	Specified Condition
   C10-40 - E22-1 (GIND)	Below 1 Ω

1. Remove the MET fuse from the instrument panel junction block.
   

2. Measure the resistance of the fuse.
   

   Standard resistance:

   Tester Connection	Specified Condition
   MET fuse	Below 1 Ω

1. Disconnect the C10 combination meter connector.
   

2. Turn the ignition switch ON.
   

3. Measure the voltage of the wire harness side connector.
   

   Standard voltage:

   Tester Connection	Specified Condition
   C10-21 - Body ground	9 to 14 V