Inspection Procedure

PERFORM ACTIVE TEST USING INTELLIGENT TESTER (OPERATION OF CIRCUIT OPENING RELAY)
1. Connect the intelligent tester to the DLC3.
2. Turn the ignition switch to the ON position and turn the tester on.
3. Enter the following menus: DIAGNOSIS / ENHANCED OBD II /ACTIVE TEST/ FUEL PUMP/SPD.
4. Check whether operating sounds can be heard while operating the relay using the tester.
  OK:
  
  Operating sounds can be heard from relay.
OK: Go to step 7

NG: GO TO NEXT STEP
INSPECT ECM POWER SOURCE CIRCUIT
OK: REPAIR OR REPLACE POWER SOURCE CIRCUIT

OK: GO TO NEXT STEP

INSPECT CIRCUIT OPENING RELAY (C/OPN)

Disconnect the 1A, 1B, 1D and 1E instrument panel junction block connectors.

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

Standard resistance

CIRCUIT OPENING RELAY TESTER CONNECTION AND SPECIFIED CONDITION

Tester Connection	Specified Condition
1B(11) - 1A(8)	10 kΩ or higher
1B(11) - 1A(8)	Below 1 Ω (when battery voltage Is applied to terminals 1E (5) and 1D(1))

NG: REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY

Fig 1: Inspecting ECM (VC Voltage)

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

OK: GO TO NEXT STEP

INSPECT ECM (FC VOLTAGE)

Disconnect the E4 and E8 connectors.
Turn the ignition switch to the ON position.

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

Standard voltage

ECM TESTER CONNECTION AND SPECIFIED CONDITION

Tester Connection	Specified Condition
FC(E4-25) - E1 (E8-1)	9 to 14 V

OK: REPLACE ECM

Fig 2: Disconnecting E4 And E8 Connectors

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: GO TO NEXT STEP

CHECK WIRE HARNESS (IGNITION SWITCH - CIRCUIT OPENING RELAY (C/OPN))

Disconnect the 15 ignition switch connector.

Fig 3: Identifying I5 Ignition Switch Connector Terminals
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
Disconnect the 1F instrument panel junction block connector.

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

Standard resistance

WIRE HARNESS TESTER CONNECTION AND SPECIFIED CONDITION

Tester Connection	Specified Condition
IG2 (15-6) - Instrument panel Junction block (1F-4)	Below 1 Ω
IG2 (15-6) or Instrument panel junction block (1F-4) - Body ground	10 kΩ or higher

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR

Fig 4: Disconnecting 1F Instrument Panel Junction Block Connector

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

OK: GO TO NEXT STEP

CHECK WIRE HARNESS (ECM - CIRCUIT OPENING RELAY)

Disconnect the E4 ECM connector.

Fig 5: Disconnecting E4 ECM Connector
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
Disconnect the 1E instrument panel junction block connector.

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

Standard resistance

WIRE HARNESS TESTER CONNECTION AND SPECIFIED CONDITION

Tester Connection	Specified Condition
FC (E4-25) - Instrument panel junction block (1E-5)	Below 1 Ω
FC (E4-25) or Instrument panel junction block (1E-5) -Body ground	10 kΩ or higher

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR

Fig 6: Disconnecting 1E Instrument Panel Junction Block Connector

OK: REPLACE ECM

INSPECT FUEL PUMP
1. Inspect the fuel pump (See INSPECTION ).
NG: REPLACE FUEL PUMP

OK: GO TO NEXT STEP

CHECK WIRE HARNESS (FUEL PUMP - CIRCUIT OPENING RELAY (C/OPN), BODY GROUND)

Disconnect the 1A instrument panel junction block connector.

Fig 7: Disconnecting 1A Instrument Panel Junction Block Connector
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
Disconnect the F9 fuel pump connector.

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

Standard resistance

WIRE HARNESS TESTER CONNECTION AND SPECIFIED CONDITION

Tester Connection	Specified Condition
Instrument panel junction block (1A-8) - Fuel pump (F9-4)	Below 1 Ω
Fuel pump (F9-5) - Body ground	Below 1 Ω
Instrument panel junction block (1A-8) or Fuel pump (F9-4) - Body ground	10 kΩ or higher

Fig 8: Identifying F9 Fuel Pump Connector Terminals

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR

OK: CHECK AND REPAIR HARNESS AND CONNECTOR (EFI RELAY - CIRCUIT OPENING RELAY)