Inspection Procedure

WARNING: This page is about a different car, the 2008 Toyota FJ Cruiser. However, it is still accessible from the selected car via links, so may be relevant.

INSPECT ECM (+B VOLTAGE)

Turn the ignition switch ON.

Fig 1: Identifying B3 And E47 ECM Connector
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Measure the voltage according to the value(s) in the table below.

Standard Voltage

TESTER CONNECTIONS SPECIFIED CONDITIONS CHART

Tester Connections	Specified Conditions
+B (E47-1) - E1 (B3-1)	11 to 14 V

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

NG: Go to next step

CHECK HARNESS AND CONNECTOR (ECM - BODY GROUND)

Disconnect the B3 ECM connector.

Fig 2: Identifying B3 ECM Connector

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Measure the resistance according to the value(s) in the table below.

Standard Resistance (Check for open)

TESTER CONNECTIONS SPECIFIED CONDITIONS CHART

Tester Connections	Specified Conditions
E1 (B3-1) - Body ground	Below 1 Ω.

Reconnect the ECM connector.

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR

OK: Go to Next Step

INSPECT ECM (IGSW VOLTAGE)

Turn the ignition switch ON.

Fig 3: Identifying E47 And B3 ECM Connectors
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Measure the voltage according to the value(s) in the table below.

Standard Voltage

TESTER CONNECTIONS SPECIFIED CONDITIONS CHART

Tester Connections	Specified Conditions
IGSW (E47-9) - E1 (B3-1)	11 to 14 V

OK: Go to step 6

NG: Go to next step

CHECK FUSE (IGN FUSE)
1. Remove the IGN fuse from the driver side junction block.
2. Check the IGN fuse resistance.
  Standard Resistance:
  
  Below 1 Ω
3. Reinstall the IGN fuse.
NG: CHECK FOR SHORT IN ALL HARNESSES AND CONNECTORS CONNECTED TO FUSE AND REPLACE FUSE

OK: Go to Next Step

INSPECT IGNITION SWITCH ASSEMBLY

Disconnect the A1 ignition switch connector.

Fig 5: Identifying Resistance Between Terminals
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Measure the resistance according to the value(s) in the table below.

Standard Resistance

STANDARD RESISTANCE

Tester Connection	Switch Condition	Specified Condition
All Terminals	LOCK	10 kΩ or higher
2 - 3	ACC	Below 1 Ω
2 - 3 - 4, 6 - 7	ON	Below 1 Ω
1 - 2 - 4, 6 - 7 - 8	START	Below 1 Ω

Reconnect the ignition switch connector.

NG: REPLACE IGNITION SWITCH ASSEMBLY (See REMOVAL )

OK: CHECK AND REPLACE HARNESS AND CONNECTOR (BATTERY - IGNITION SWITCH, IGNITION SWITCH - ECM)

INSPECT ECM (MREL VOLTAGE)

Turn the ignition switch ON.

Fig 6: Identifying B3 And E47 ECM Connectors
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Measure the voltage according to the value(s) in the table below.

Standard Voltage

TESTER CONNECTIONS SPECIFIED CONDITIONS CHART

Tester Connections	Specified Conditions
MREL (E47-8) - E1 (B3-1)	11 to 14 V

NG: REPLACE ECM (See REMOVAL )

OK: Go to Next Step

CHECK FUSE (EFI FUSE)
1. Remove the EFI fuse from the engine room relay block.
2. Check the EFI fuse resistance.
  Standard Resistance: Below 1 Ω.
3. Reinstall the EFI fuse.
NG: CHECK FOR SHORT IN ALL HARNESSES AND CONNECTORS CONNECTED TO FUSE AND REPLACE FUSE

OK: Go to Next Step

INSPECT EFI RELAY

Remove the EFI relay from the engine room relay block.

Fig 8: Identifying EFI Relay

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Measure the resistance according to the value(s) in the table below.

Standard Resistance

TESTER CONNECTIONS SPECIFIED CONDITIONS CHART

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.

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.

Fig 9: Identifying EFI Relay And E47 ECM Connector

Remove the EFI relay from the engine room relay block.
Disconnect the E47 ECM connector.

Measure the resistance according to the value(s) in the table below.

Standard Resistance (Check for open)

TESTER CONNECTIONS SPECIFIED CONDITIONS CHART

Tester Connections	Specified Conditions
EFI relay (1) - MREL (E47-8)	Below 1 Ω

Standard Resistance (Check for short)

TESTER CONNECTIONS SPECIFIED CONDITIONS CHART

Tester Connections	Specified Conditions
EFI relay (1) or MREL (E47-8) - Body ground	10 kΩ or higher

Reinstall the EFI relay.
Reconnect the ECM connector.

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

Remove the EFI relay from the engine room relay block.

Measure the resistance according to the value(s) in the table below.

Standard Resistance (Check for open)

TESTER CONNECTIONS SPECIFIED CONDITIONS CHART

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

Reinstall the EFI relay.

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR

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