Inspection Procedure

INSPECT ECM (+B VOLTAGE)

Turn the ignition switch ON.
Check the voltage between of the E10 and E6 ECM connectors.

Fig 1: Identifying ECM Connector Terminals

Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

Standard:

ECM CONNECTORS - VOLTAGE TABLE

Tester Connection	Specified Condition
E6-1 (+B) - E10-3 (E1)	9 to 14 V

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

NG: Go to next step

CHECK WIRE HARNESS (ECM - BODY GROUND)

Disconnect the E10 ECM connector.
Check the resistance of the wire harness side connectors.

Fig 2: Disconnecting E10 ECM Connector

Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

Standard:

ECM - BODY GROUND - RESISTANCE TABLE

Tester Connection	Specified Condition
E10-3 (E1) - Body ground	Below 1 Ω

NG: REPAIR OR REPLACE HARNESS AND CONNECTOR

OK: Go to next step

INSPECT ECM (IGSW VOLTAGE)

Turn the ignition switch ON.
Check the voltage of the E10 and E6 ECM connectors.

Fig 3: Identifying ECM Connector Terminals

Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

Standard:

ECM CONNECTORS - VOLTAGE TABLE

Tester Connection	Specified Condition
E6-9 (IGSW) - E10-3 (E1)	9 to 14 V

OK: Go to step 6

NG: Go to next step

CHECK FUSE (IGN)
1. Remove the IGN fuse from the engine room J/B.
2. Check the resistance of the IGN fuse.
  Standard: Below 1 Ω
Fig 4: Identifying IGN Fuse
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

NG: REPLACE FUSE

OK: Go to next step

INSPECT IGNITION OR STARTER SWITCH ASSY

Check the resistance of the ignition switch terminals.

Fig 5: Identifying Ignition Switch Connector Terminals

Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

Standard:

IGNITION SWITCH - RESISTANCE TABLE

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

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 E10 and E6 ECM connectors.

Fig 6: Identifying ECM Connector Terminals

Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

Standard:

ECM CONNECTORS - VOLTAGE TABLE

Tester Connection	Specified Condition
E6-8 (MREL) - E10-3 (E1)	9 to 14 V

NG: REPLACE ECM (See ECM (2AZ-FE) )

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
Fig 7: Identifying EFI Fuse
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

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.

Fig 8: Identifying Relay Test Terminals

Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

Standard:

EFI RELAY - RESISTANCE TABLE

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 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.

Fig 9: Identifying E6 ECM Connector Terminal And EFI Relay

Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

Standard:

EFI RELAY - ECM - RESISTANCE TABLE

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

Standard:

EFI RELAY - BODY GROUND - RESISTANCE TABLE

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

OK: REPAIR OR REPLACE HARNESS AND CONNECTOR

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