Inspection Procedure

Check fuel pump operation (See FUEL PUMP ).
1. OK: Go to step 8 .
2. NG: Go to next step
Connect hand-held tester, and check operation of fuel pump relay.
PREPARATION:
1. Connect the hand-held tester to the DLC3.
2. Turn the ignition switch ON and push the hand-held tester main switch ON.
3. Enter the following menu: DIAGNOSIS / ENHANCED OBD II / ACTIVE TEST / FUEL PUMP SPD.
CHECK:

Check the operation of the fuel pump relay when it is switched ON and OFF by the hand-held tester.

OK:

Operating noise can be heard from the relay.
1. OK: Go to step 4 .
2. NG: Go to next step

Check operation of fuel pump relay.

PREPARATION:

Remove the fuel pump relay from the engine room R/B.

CHECK:

Inspect the fuel pump relay.

OK:

SYMBOLS AND SPECIFIED CONDITION

Terminal No.	Condition	Specified Condition
3 - 4	Apply B+ between terminals 1 and 2	10 kΩ or higher
3 - 4	Always	Below 1 Ω
3 - 5	Always	10 kΩ or higher
3 - 5	Apply B+ between terminals 1 and 2	Below 1 Ω

Fig 1: Checking Operation Of Fuel Pump Relay

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Check fuel pump (See FUEL PUMP ).
1. NG: Repair or replace fuel pump.
2. OK: Go to next step

Check circuit opening relay (See CIRCUIT OPENING RELAY ).

PREPARATION:

Remove the C/OPN relay from the engine room J/B.

CHECK:

Inspect the C/OPN relay.

OK:

Standard:

TERMINAL NUMBER AND SPECIFIED CONDITION

Terminal No.	Condition	Specified Condition
3 - 5	Always	10 kΩ or higher
3 - 5	Apply B+ between terminals 1 and 2	Below 1 Ω

Fig 2: Inspecting C/OPN Relay

Check for open in harness and connector between circuit opening relay and fuel pump, and fuel pump and body ground (See HOW TO USE THE DIAGNOSTIC CHART AND INSPECTION PROCEDURE ).
1. NG: Repair or replace harness or connector.
2. OK: Go to next step
Check voltage between terminal FC and E1 of ECM connector.
PREPARATION:

Turn the ignition switch ON.

CHECK:

Measure the voltage between terminal FC of the ECM connector and body ground.

OK:

Voltage: 9 to 14 V

Fig 3: Identifying E4 Connector Terminals
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
1. NG: Check for open in harness and connector between battery and FC terminal of ECM (See HOW TO USE THE DIAGNOSTIC CHART AND INSPECTION PROCEDURE ).
2. OK: Proceed to PROBLEM SYMPTOMS TABLE
Check fuel pump resistor (See INSPECTION ).
1. NG: Replace fuel pump resistor.
2. OK: Check for open in harness and connector between circuit opening relay and fuel pump resistor, and fuel pump resistor and fuel pump (See HOW TO USE THE DIAGNOSTIC CHART AND INSPECTION PROCEDURE ).