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
NG: REPAIR OR REPLACE POWER SOURCE CIRCUIT

OK: go to next step

INSPECT CIRCUIT OPENING RELAY (C/OPN)

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

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

Standard resistance

RESISTANCE SPECIFIED CONDITIONS

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(S) and 1D (1))

Fig 1: Identifying Resistance Of Circuit Opening Relay

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY

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

VOLTAGE SPECIFIED CONDITION

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

Fig 2: Identifying E1 And FC Terminal Of ECM Connector

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

OK: REPLACE ECM

NG: go to next step

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

Disconnect the 15 ignition switch connector.

Fig 3: Identifying IG2 Terminal Of Ignition Switch Connector
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
Disconnect the 1F instrument panel junction block connector.

Fig 4: Identifying 1F Instrument Panel Junction Block Connector

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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

Standard resistance

RESISTANCE SPECIFIED CONDITIONS

Tester Connection	Specified Condition
IG2 (I5-6) - Instrument panel junction block (1F-4)	Below 1 Ω
IG2 (I5-6) or Instrument panel junction block (1F-4) - Body ground	10 kΩ or higher

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR

OK: go to next step

CHECK WIRE HARNESS (ECM - CIRCUIT OPENING RELAY)

Disconnect the E4 ECM connector.

Fig 5: Identifying FC Terminal Of ECM Connector
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
Disconnect the 1E instrument panel junction block connector.

Fig 6: Identifying 1E Instrument Panel Junction Block Connector

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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

Standard resistance

RESISTANCE SPECIFIED CONDITIONS

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

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

Fig 8: Identifying F9 Fuel Pump Connector

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

Standard resistance

RESISTANCE SPECIFIED CONDITIONS

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

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR

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