Inspection Procedure

Hand-held tester: 

1. Check operation of fuel pump. 

   PREPARATION: 

   1. Connect the hand-held tester to the DLC3.
   2. Turn the ignition switch to ON and turn the hand-held tester main switch ON.
   3. Select the item "DIAGNOSIS/ENHANCED OBD II/ACTIVE TEST/FUEL PUMP/SPD".

   CHECK: 

   Check for the fuel pressure in the fuel inlet hose when it is pinched by hand.

   OK: 

   1. There is pressure in the fuel inlet hose. 

   HINT:

   At this time, you will hear a fuel flowing noise.

   Fig 1: Checking Fuel Inlet Hose

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
   1. OK: Proceed to next circuit inspection shown on  PROBLEM SYMPTOMS TABLE  . 
   2. NG: Go to next step. 
2. Check fuel pump (See  FUEL PUMP  ). 
   1. NG: Replace fuel pump. 
   2. OK: Go to next step. 
3. Check circuit opening relay (See  CIRCUIT OPENING RELAY  ). 
   1. NG: Replace circuit opening relay. 
   2. OK: Go to next step. 
4. 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. 
5. Check voltage between terminal FC of ECM and body ground. 

   PREPARATION: 

   1. Remove the glove compartment (See ENGINE CONTROL MODULE (ECM) ).
   2. Turn the ignition switch to ON.

   CHECK: 

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

   OK: 

   1. Voltage: 9 to 14 V 
   Fig 2: Measuring Voltage

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
   1. OK: Proceed to next circuit inspection shown on  PROBLEM SYMPTOMS TABLE  . 
   2. NG: Go to next step. 
6. Check for open in harness and connector between circuit opening relay and ECM (See  HOW TO USE THE DIAGNOSTIC CHART AND INSPECTION PROCEDURE  ). 
   1. NG: Repair or replace harness or connector. 
   2. OK: Replace ECM (See  HOW TO USE THE DIAGNOSTIC CHART AND INSPECTION PROCEDURE  ). 

OBD II scan tool (excluding hand-held tester): 

1. Check operation of fuel pump. 

   PREPARATION: 

   1. Remove the glove compartment (See ENGINE CONTROL MODULE (ECM) ).
   2. Turn the ignition switch to ON.

   CHECK: 

   1. Connect terminal FC of the ECM connector and the body ground.
   2. Check for the fuel pressure in the inlet hose when it is pinched by hand.

   OK: 

   1. There is pressure in the fuel inlet hose. 

   HINT:

   At this time, you will hear a fuel flowing noise.

   Fig 3: Checking Fuel Return Hose

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
   1. OK: Proceed to next circuit inspection shown on  PROBLEM SYMPTOMS TABLE  . 
   2. NG: Go to next step. 
2. Check fuel pump (See  FUEL PUMP  ). 
   1. NG: Replace fuel pump. 
   2. OK: Go to next step. 
3. Check circuit opening relay (See  CIRCUIT OPENING RELAY  ). 
   1. NG: Replace circuit opening relay. 
   2. OK: Go to next step. 
4. 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. 
5. Check voltage between terminal FC of ECM connector and body ground. 

   PREPARATION: 

   1. Remove the glove compartment (See ENGINE CONTROL MODULE (ECM) ).
   2. Turn the ignition switch to ON.

   CHECK: 

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

   OK: 

   1. Voltage: 9 to 14 V 
   Fig 4: Measuring Voltage

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
   1. OK: Proceed to next circuit inspection shown on  PROBLEM SYMPTOMS TABLE  . 
   2. NG: Go to next step. 
6. Check for open in harness and connector between circuit opening relay and ECM (See  HOW TO USE THE DIAGNOSTIC CHART AND INSPECTION PROCEDURE  ). 
   1. NG: Repair or replace harness or connector. 
   2. OK: Replace ECM (See  HOW TO USE THE DIAGNOSTIC CHART AND INSPECTION PROCEDURE  ).