Inspection Procedure

INSPECT ECM (+B VOLTAGE)

Turn the ignition switch ON.

Measure the voltage between of the ECM connectors.

Standard voltage

TESTER CONNECTION SPECIFIED CONDITION

Tester Connection	Specified Condition
E5-1 (+B) - E9-1 (E1)	9 to 14 V

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

Fig 1: Locating ECM Connectors

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: GO TO NEXT STEP

CHECK HARNESS AND CONNECTOR (ECM - BODY GROUND)

Disconnect the E9 ECM connector.

Measure the resistance of the wire harness side connectors.

Standard resistance

TESTER CONNECTION SPECIFIED CONDITION

Tester Connection	Specified Condition
E9-1 (E1) - Body ground	Below 1 Ω

NG: REPAIR OR REPLACE HARNESS AND CONNECTOR

Fig 2: Disconnecting E9 ECM Connector

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

OK: GO TO NEXT STEP

INSPECT ECM (IGSW VOLTAGE)

Turn the ignition switch ON.

Measure the voltage of the E5 and E9 ECM connectors.

Standard voltage

TESTER CONNECTION SPECIFIED CONDITION

Tester Connection	Specified Condition
E5-9 (IGSW) - E9-1 (E1)	9 to 14 V

OK: Go to step 6

Fig 3: Locating E5 And E9 ECM Connectors

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: GO TO NEXT STEP

INSPECT IGN FUSE
1. Remove the IGN fuse from the instrument panel J/B assembly.
2. Measure the resistance of the IGN fuse.
  Standard resistance: Below 1 Ω
NG: REPLACE IGN FUSE

Fig 4: Measuring Resistance Of IGN Fuse
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

OK: GO TO NEXT STEP

INSPECT IGNITION OR STARTER SWITCH ASSEMBLY

Measure the resistance of the ignition switch terminals.

Standard resistance

TESTER CONNECTION SPECIFIED CONDITION

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

NG: REPLACE IGNITION OR STARTER SWITCH ASSEMBLY

Fig 5: Locating Ignition Switch Connector Terminals

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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 voltage

TESTER CONNECTION SPECIFIED CONDITION

Tester Connection	Specified Condition
E5-8 (MREL) - E9-1 (E1)	9 to 14 V

NG: REPLACE ECM

Fig 6: Identifying ECM Connectors

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

OK: GO TO NEXT STEP

INSPECT EFI NO. 1 FUSE
1. Remove the EFI No. 1 fuse from the engine room J/B.
2. Measure the resistance of the EFI No. 1 fuse.
  Standard resistance: Below 1 Ω
NG: REPLACE EFI NO. 1 FUSE

Fig 7: Measuring Resistance Of EFI No. 1 Fuse
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

OK: GO TO NEXT STEP

INSPECT EFI RELAY

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

Measure the resistance of the EFI relay.

Standard resistance

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)

NG: REPLACE EFI RELAY

Fig 8: Identifying Relay Test Terminals

OK: GO TO NEXT STEP

CHECK HARNESS AND CONNECTOR (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 E5 ECM connector.

Measure the resistance of the wire harness side connectors.

Standard resistance

TESTER CONNECTION SPECIFIED CONDITION

Tester Connection	Specified Condition
J/B EFI relay terminal 1 - E5-8 (MREL)	Below 1 Ω
J/B EFI relay terminal 1 or E5-8 (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.

Measure the resistance of the wire harness side connector.

Standard resistance

TESTER CONNECTION SPECIFIED CONDITION

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

OK: REPAIR OR REPLACE HARNESS AND CONNECTOR

Fig 9: Disconnecting E5 ECM Connector

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