Inspection Procedure

INSPECT ECM (+B VOLTAGE)

Turn the ignition switch ON.

Measure the voltage of the ECM connectors.

Standard:

TESTER CONNECTION SPECIFIED CONDITION

Tester Connection	Specified Condition
E6-1 (+B) - E8-1 (E1)	9 to 14 V

Fig 1: Measuring Voltage Of ECM Connectors

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

OK: PROCEED TO NEXT CIRCUIT INSPECTION SHOWN ON PROBLEM SYMPTOMS TABLE (See PROBLEM SYMPTOMS TABLE )

NG: Go to Next Step.

CHECK WIRE HARNESS (ECM - BODY GROUND)

Disconnect the E8 ECM connector.

Check the resistance of the wire harness side connectors.

Standard:

TESTER CONNECTION SPECIFIED CONDITION

Tester Connection	Specified Condition
E8-1 (E1) - Body ground	Below 1 Ω

Fig 2: VAPOR Press Description Table

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPAIR OR REPLACE HARNESS AND CONNECTOR

OK: Go to Next Step.

INSPECT ECM (IGSW VOLTAGE)

Turn the ignition switch ON.

Measure the voltage of the ECM connectors.

Standard:

TESTER CONNECTION SPECIFIED CONDITION

Tester Connection	Specified Condition
E6-9 (IGSW) - E8-1 (E1)	9 to 14 V

Fig 3: Inspecting ECM (Igsw Voltage)

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

OK: Go to step 6

NG:Go to Next Step.

CHECK FUSE (IG2)
1. Remove the IG2 fuse from the engine room J/B.
2. Check the resistance of the IG2 fuse.
  Standard: Below 1 Ω
  
  Fig 4: Removing IG2 Fuse From Engine Room J/B
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
1. NG: REPLACE FUSE
OK: Go to Next Step.

INSPECT IGNITION OR STARTER SWITCH ASSY

Check the resistance of the switch terminals shown in the chart below.

Standard:

TESTER CONNECTION SPECIFIED CONDITION CHART

Switch Condition	Tester Connection	Specified Condition
LOCK	6 (IG2) - 7 (AM2)	10 kΩ or higher
START	6 (IG2) - 7 (AM2)	Below 1 Ω

Fig 5: Inspecting Ignition Or Starter Switch Assy

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPLACE IGNITION OR STARTER SWITCH ASSY

OK:

CHECK AND REPAIR HARNESS AND CONNECTOR (BATTERY - IGNITION SWITCH, IGNITION SWITCH - ECM)

INSPECT ECM (MREL VOLTAGE)

Turn the ignition switch ON.

Measure the voltage of the ECM connectors.

Standard:

TESTER CONNECTION SPECIFIED CONDITION

Tester Connection	Specified Condition
E6-8 (MREL) - E8-1 (E1)	9 to 14 V

Fig 6: Inspecting ECM (MREL Voltage)

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPLACE ECM (See ELECTRONIC CIRCUIT INSPECTION PROCEDURE )

OK: Go to Next Step.

CHECK FUSE (EFI)
1. Remove the EFI fuse from the engine room J/B.
2. Check the resistance of the EFI fuse.
  Standard: Below 1 Ω
1. NG: REPLACE FUSE
OK: Go to Next Step.

INSPECT RELAY (EFI)

Remove the EFI relay from the engine room J/B.

Check the resistance of the EFI relay.

Standard:

TESTER CONNECTION SPECIFIED CONDITION

Tester Connection	Specified Condition
3-5	10 kΩ or higher
3-5	Below 1 Ω (when battery voltage is applied to terminals 1 and 2)

Fig 7: Removing EFI Fuse From Engine Room J/B

NG: REPLACE RELAY

OK: Go to Next Step.

CHECK WIRE HARNESS (EFI RELAY - ECM, EFI RELAY - BODY GROUND)

Check the wire harness between the EFI relay and ECM.

Remove the EFI relay from the engine room J/B.
Disconnect the E6 ECM connector.

Check the resistance of the wire harness side connectors.

Standard:

TESTER CONNECTION SPECIFIED CONDITION

Tester Connection	Specified Condition
J/B EFI relay terminal 1 - E6-8 (MREL)	Below 1 Ω
J/B EFI relay terminal 1 or E6-8 (MREL) - Body ground	10 kΩ or higher

Check the wire harness between the EFI relay and body ground.

Remove the EFI relay from the engine room J/B.
Check the resistance between the wire harness side connector and body ground.

Standard:

TESTER CONNECTION SPECIFIED CONDITION

Tester Connection	Specified Condition
J/B EFI relay terminal 2 - Body ground	Below 1 Ω

Fig 8: Removing EFI Relay From Engine Room J/B

OK: REPAIR OR REPLACE HARNESS AND CONNECTOR

NG:

CHECK AND REPAIR HARNESS AND CONNECTOR (TERMINAL +B OF ECM - BATTERY POSITIVE TERMINAL)