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 ).

1. 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 

2. 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 

3. 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 

4. INSPECT IG2 RELAY (Marking: IG2) 
   1. Remove the IG2 relay from the engine room No. 1 relay block.
   2. 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 

5. CHECK ECM (FC VOLTAGE) 
   1. Turn the ignition switch ON.
   2. 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 

6. INSPECT FUEL PUMP RELAY (Marking: F/PMP) 
   1. Remove the fuel pump relay from the engine room No. 2 relay block.
   2. 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 

7. 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.