Inspection Procedure

HINT:

This troubleshooting procedure is based on the premise that the engine is started. If the engine is not started, proceed to the problem symptoms table (see PROBLEM SYMPTOMS TABLE ).

PERFORM ACTIVE TEST BY TECHSTREAM (OPERATE C/OPN RELAY)
1. Connect the Techstream to the DLC3.
2. Turn the ignition switch ON and turn the tester ON.
3. Enter the following menus: Powertrain / Engine and ECT / Active Test / Control the Fuel Pump / Speed.
4. Check the relay operation while operating it using the tester.
OK:

Operating noise can be heard from the relay.

OK: Go to step 6

NG: Go to next step
INSPECT FUSE (IGN)
1. Remove the IGN fuse from the engine room No. 1 relay block.
2. Measure the resistance of the fuse.
Standard resistance:

Below 1 Ω

NG: REPLACE FUSE

Fig 1: Identifying IGN Fuse
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

OK: Go to next step
INSPECT CIRCUIT OPENING RELAY (Marking: CIR OPN)
1. Remove the circuit opening relay from the engine room No. 2 relay block.
2. Measure the resistance of the relay.
Standard resistance:

Below 1 Ω.

NG: REPLACE CIRCUIT OPENING RELAY

Fig 2: Engine Room No. 2 Relay Circuit Diagram
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

OK: Go to next step

INSPECT IG2 RELAY (Marking: IG2)

Remove the IG2 relay from the engine room No. 1 relay block.
Measure the resistance of the relay.

Standard resistance

TESTER CONNECTION SPECIFIED CONDITION CHART

Tester Connection	Specified Condition
3-5	10 kΩ or higher
3-5	Below 1 Ω (when battery voltage is applied to terminals 1 and 2)

Fig 3: IG2 Relay Circuit Diagram

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPLACE IG2 RELAY

OK: Go to next step

CHECK ECM (FC VOLTAGE)

Turn the ignition switch ON.
Measure the voltage of the ECM connector.

Standard voltage

TESTER CONNECTION SPECIFIED CONDITION CHART

Tester Connection	Specified Condition
E6-14 (FC) - Body ground	9 to 14 V

NG: REPAIR OR REPLACE HARNESS AND CONNECTOR

Fig 4: Identifying E6 ECM Connector Terminals

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

OK: REPLACE ECM

INSPECT FUEL PUMP RELAY (Marking: F/PMP)

Remove the fuel pump relay from the engine room No. 2 relay block.
Measure the resistance of the relay.

Standard resistance

TESTER CONNECTION SPECIFIED CONDITION CHART

Tester Connection	Specified Condition
3-4	Below 1 Ω
3-4	10 kΩ or higher (when battery voltage is applied to terminals 1 and 2)

Fig 5: Fuel Pump Relay Circuit Diagram

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPLACE FUEL PUMP RELAY

OK: Go to next step

INSPECT FUEL PUMP
1. Check the resistance of the fuel pump.
  1. Measure the resistance between terminals 4 and 5.
  Standard resistance:
  
  0.2 to 3.0 Ω at 20°C (68°F)
2. Check the operation of the fuel pump.
  1. Apply battery voltage to both the terminals. Check that the pump operates.
  Fig 6: Identifying Fuel Pump Connector
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
NOTE:
- These tests must be done quickly (within 10 seconds) to prevent the coil from burning out.
- Keep fuel pump as far away from the battery as possible.
CAUTION: Always turn the voltage on and off on the battery side, not the fuel pump.

NG: REPLACE FUEL PUMP

OK: Go to next step
INSPECT FUEL PUMP RESISTOR
1. Measure the resistance of the resistor.
Standard resistance:

0.30 to 0.34 Ω at 20°C (68°F)

NG: REPLACE FUEL PUMP RESISTOR

Fig 7: Inspecting Fuel Pump Resistor
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

OK: Go to next step

CHECK ECM (FPR VOLTAGE)

Turn the ignition switch ON.
Measure the voltage of the ECM connector.

Standard voltage

TESTER CONNECTION SPECIFIED CONDITION CHART

Tester Connection	Specified Condition
E6-15 (FPR) - Body ground	9 to 14 V

NG: REPAIR OR REPLACE HARNESS AND CONNECTOR

Fig 8: Identifying E6 ECM Connector

OK: Go to next step

CHECK FOR SHORT OR OPEN IN ALL HARNESSES CONNECTED TO FUEL PUMP AND FUEL PUMP RESISTOR
NG: REPAIR OR REPLACE HARNESS AND CONNECTOR

OK: REPLACE ECM