Inspection Procedure

INSPECT ECM (+B VOLTAGE)

Turn the ignition switch ON.

Measure the voltage between the terminals of the E4 and E6 ECM connectors.

Standard:

TESTER CONNECTION AND SPECIFIED CONDITION

Tester Connection	Specified Condition
+B(E6-1)-E1 (E4-7)	8 to 14 V

Fig 1: Measuring Voltage Between Terminals Of E4 And E6 ECM Connectors

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

OK : REPLACE ECM (See REPLACEMENT )
NG : GO TO NEXT STEP

CHECK HARNESS AND CONNECTOR (ECM - BODY GROUND)

Disconnect the E4 ECM connector.

Check the resistance between the wire harness side connectors.

Standard (Check for open):

TESTER CONNECTION AND SPECIFIED CONDITION

Tester Connection	Specified Condition
E1 (E4-7) - Body ground	Below 1 Ω

Reconnect the ECM connector.

Fig 2: Identifying E4 ECM Connector Terminal

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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

INSPECT IGNITION OR STARTER SWITCH ASSY

Disconnect the I10 ignition switch connector.

Check for continuity between the connector terminals shown in the chart below.

TESTER CONNECTION AND SPECIFIED CONDITION

Switch Position	Tester Connection	Specified Condition
LOCK	All Terminals	No continuity
ACC	1-3	Continuity
ON	1-2, 1-3, 2-3, 5-6	Continuity
START	1-2, 4-5, 4-6, 5-6	Continuity

Reconnect the ignition switch connector.

Fig 3: Identifying I10 Ignition Switch Connector Terminal

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG : REPLACE IGNITION OR STARTER SWITCH ASSY
OK : Go to next step

CHECK FUSE (EFI FUSE)
1. Remove the EFI fuse from the engine room R/B.
2. Check for continuity in the EFI fuse.
  Standard: Continuity
3. Reinstall the EFI fuse.
Fig 4: Removing EFI Fuse From Engine Room R/B
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
- NG : CHECK FOR SHORT IN ALL HARNESSES AND COMPONENTS CONNECTED FUSE
- OK : Go to next step

INSPECT EFI RELAY

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

Check for continuity in the circuit EFI relay.

Standard:

TESTER CONNECTION AND SPECIFIED CONDITION

Tester Connection	Specified Condition
1-2	Continuity
3-5	No continuity
3-5	Continuity (Apply battery voltage to terminals 1 and 2)

Reinstall the EFI fuse.

Fig 5: Checking Continuity In Circuit EFI Relay

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG : REPLACE EFI RELAY
OK : Go to next step

CHECK HARNESS AND CONNECTOR (EFI RELAY - ECM, EFI RELAY - BODY GROUND)

Check the harness and connector between the EFI relay and ECM.

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

Check the resistance between the wire harness side connectors.

Standard (Check for open):

TESTER CONNECTION AND SPECIFIED CONDITION

Tester Connection	Specified Condition
EFI relay (3)-+B (E6-1)	Below 1 Ω

Fig 6: Checking Harness And Connector Between EFI Relay And ECM

Standard (Check for short):

TESTER CONNECTION AND SPECIFIED CONDITION

Tester Connection	Specified Condition
EFI relay (3) or +B (E6-1) - Body ground	10kΩ or higher

Reconnect the ECM connector.
Reinstall the EFI relay.

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

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

Check the resistance between the wire harness side connector and body ground.

Standard (Check for open):

TESTER CONNECTION AND SPECIFIED CONDITION

Tester Connection	Specified Condition
EFI relay (2) - Body ground	Below 1 Ω

Reinstall the EFI relay.

Fig 7: Identifying E6 ECM Connector Terminal

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