Inspection Procedure

CHECK ECM (+B VOLTAGE)

Turn the ignition switch ON.

Measure the voltage of the ECM connectors.

Standard:

RESISTANCE SPECIFICATIONS

Tester Connection	Specified condition
+B (E6-6) - E1 (E3-7)	9 to 14 V

Fig 1: Identifying ECM Connectors Terminals

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 E3 ECM connector.

Measure the resistance of the wire harness side connector.

Standard:

RESISTANCE SPECIFICATIONS

Tester Connection	Specified condition
E1 (E3-7) - Body ground	Below 1 ohms

Fig 2: Identifying E3 ECM Connector Terminals

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPAIR OR REPLACE HARNESS AND CONNECTOR
OK: Go to next step.

CHECK ECM (IGSW VOLTAGE)

Turn the ignition switch ON.

Measure the voltage of the ECM connectors.

Standard:

RESISTANCE SPECIFICATIONS

Tester Connection	Specified condition
IGSW (E6-17) - E1 (E3-7)	9 to 14 V

Fig 3: Identifying ECM Connectors Terminals

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

OK: Go to step 6 .
NG: Go to next step.

INSPECT FUSE (IGN)
1. Remove the IGN fuse from the engine room No. 2 R/B.
2. Measure the resistance of the fuse.
  Standard: Below 1 Ω
  
  Fig 4: Identifying IGN Fuse Location
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
1. NG: REPLACE FUSE
2. OK: Go to next step.

INSPECT IGNITION SWITCH ASSY

Measure the resistance of the switch

Standard:

RESISTANCE SPECIFICATIONS

Tester Connection	Switch Condition	Specified Condition
7 (AM2) - 6 (IG2)	LOCK	10 k ohms or higher
7 (AM2) - 6 (IG2)	ON	Below 1 ohms

Fig 5: Identifying Ignition Switch Terminals

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPLACE IGNITION SWITCH ASSY
OK: REPAIR OR REPLACE HARNESS AND CONNECTOR (BATTERY - IGNITION SWITCH, IGNITION SWITCH - ECM)

CHECK ECM (MREL VOLTAGE)

Turn the ignition switch ON.

Measure the voltage of the ECM connectors.

Standard:

RESISTANCE SPECIFICATIONS

Tester Connection	Specified Condition
E6-13 (MREL) - E3-7 (E1)	9 to 14 V

Fig 6: Installing ECM Connectors Terminals

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPLACE ECM (See REPLACEMENT )
OK: Go to next step.

CHECK FUSE (EFI)
1. Remove the EFI fuse from the engine room No. 1 R/B, J/B.
2. Measure the resistance of the fuse.
  Standard: Below 1 Ω
  
  Fig 7: Identifying EFI Fuse Location
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
1. NG: REPLACE FUSE
2. OK: Go to next step.

INSPECT RELAY (Marking: EFI)

Remove the EFI relay from the engine room No. 2 R/B.

Measure the resistance of the relay.

Standard:

RESISTANCE SPECIFICATIONS

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

Fig 8: Identifying Relay (Marking EFI)

NG: REPLACE RELAY
OK: Go to next step.

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

Remove the EFI relay from the engine room No. 2 R/B.
Disconnect the E6 ECM connector.

Measure the resistance of the wire harness side connectors.

Standard:

RESISTANCE SPECIFICATIONS

Tester Connection	Specified Condition
R/B EFI relay terminal 2 - E6-13 (MREL)	Below 1 ohms
R/B EFI relay terminal 2 or E6-13 (MREL) - Body ground	10 k ohms or higher
R/B EFI relay terminal 1 - Body ground	Below 1 ohms

Fig 9: Removing EFI Relay From Engine Room No. 2 R/B

NG: REPLACE ECM (See REPLACEMENT )
OK: REPAIR OR REPLACE HARNESS AND CONNECTOR (TERMINAL +B OF ECM - BATTERY POSITIVE TERMINAL)