Inspection Procedure

WARNING: This page is about a different variant/trim than selected.

INSPECT ECM (+B VOLTAGE)

Turn the ignition switch to ON.

Measure the voltage between the terminals of the E3 and E6 ECM connectors.

Standard:

ECM (+B VOLTAGE)

Tester Connections	Specified Conditions
+B (E6-1) - E1 (E3-5)	Between 9 V and 14 V

Fig 1: Inspecting ECM (+B Voltage)

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

OK: REPLACE PROCEED TO NEXT CIRCUIT INSPECTION SHOWN ON PROBLEM SYMPTOMS TABLE
NG: GO TO NEXT STEP

CHECK HARNESS AND CONNECTOR (ECM - BODY GROUND)

Disconnect the negative battery cable.
Disconnect the E3 ECM connector.

Check the resistance.

Standard (Check for open):

ECM - BODY GROUND RESISTANCE (CHECK FOR OPEN)

Tester Connections	Specified Conditions
E1 (E3-5) - Body ground	Below 1 Ω

Reconnect the ECM connector.
Reconnect the negative battery cable.

Fig 2: Disconnecting E3 ECM Connector
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 the resistance between the connector terminals shown in the table below.

Standard:

IGNITION OR STARTER SWITCH ASSY RESISTANCE

Switch Positions	Tester Connections	Specified Conditions
LOCK	All Terminals	10 kΩ or higher
ACC	1-3	Below 1 Ω
ON	1-2, 1-3, 2-3, 5-6	Below 1 Ω
START	1-2, 4-5, 4-6, 5-6	Below 1 Ω

Fig 3: Identifying Terminals Of Ignition Switch Connector

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Reconnect the ignition switch connector.

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 the EFI fuse resistance.
  Standard: Below 1 Ω
3. Reinstall the EFI fuse.
  
  Fig 4: Identifying Location Of EFI Fuse
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
1. NG: CHECK FOR SHORT IN ALL HARNESSES AND COMPONENTS CONNECTED TO FUSE
2. OK: GO TO NEXT STEP

INSPECT EFI RELAY

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

Check the EFI relay resistance.

Standard:

EFI RELAY RESISTANCE

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

Reinstall the EFI relay.

Fig 5: Inspecting 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.

Standard (Check for open):

EFI RELAY - ECM, EFI RELAY - BODY GROUND RESISTANCE (CHECK FOR OPEN)

Tester Connections	Specified Conditions
EFI relay (3) - +B (E6-1)	Below 1 Ω

Fig 6: Removing EFI Relay

Standard (Check for short):

EFI RELAY - ECM, EFI RELAY - BODY GROUND RESISTANCE (CHECK FOR SHORT)

Tester Connections	Specified Conditions
EFI relay (3) or +B (E6-1) - Body ground	10 kΩ 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.

Standard (Check for open):

EFI RELAY - BODY GROUND RESISTANCE (CHECK FOR OPEN)

Tester Connections	Specified Conditions
EFI relay (2) - Body ground	Below 1 Ω

Fig 7: Disconnecting E6 ECM Connector

Reinstall the EFI relay.

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