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 to 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:
1. Operating noise can be heard from the fuel pump relay.
1. OK: Go to step 4 .
2. NG: Go To Next Step.

Check fuel pump relay.

Fig 1: Identifying Fuel Pump Relay

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

PREPARATION:

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

CHECK:

Inspect the fuel pump relay.

OK:

TERMINAL SPECIFIED CONDITION (1 OF 2)

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

Check fuel pump (See INSPECTION ).
1. NG: Repair or replace fuel pump.
2. OK: Go To Next Step.

Check circuit opening relay.

Fig 2: Checking Circuit Opening Relay

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

PREPARATION:

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

CHECK:

Inspect the C/OPN relay.

OK:

TERMINAL SPECIFIED CONDITION (2 OF 2)

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

Check for open in harness and connector between EFI 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.

Fig 3: Identifying E3 ECM Connector
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

PREPARATION:

Turn the ignition switch to ON.

CHECK:

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

OK:
1. Voltage: 9 to 14 V
1. NG: Check for open in harness and connector between battery and FC terminal of ENGINE CONTROL MODULE (ECM) .
2. OK: Proceed to PROBLEM SYMPTOMS TABLE .
Check FUEL PUMP RESISTOR .
1. NG: Replace fuel pump resistor.
2. OK: Check and repair harness and connector between fuel pump relay and fuel pump resistor, and fuel pump resistor and fuel pump (See HOW TO USE THE DIAGNOSTIC CHART AND INSPECTION PROCEDURE ).