Inspection Procedure

1. Connect the intelligent tester to the DLC3.
2. Turn the ignition switch ON and turn the tester ON.
3. Select the following menu items: DIAGNOSIS / ENHANCED OBD II / ACTIVE TEST / FUEL PUMP / SPD.
4. Check whether the fuel pump operating sound occurs when performing the Active Test on the tester.

OK: 

Fuel pump operating sound occurs. 

OK: GO to step  8

NG: GO to next step 

1. Measure the voltage between the terminal of the instrument panel Junction Block (J/B) and the body ground when the ignition switch is turned ON and OFF.

Standard voltage 

OK: GO to step  4

Fig 1: Inspecting Instrument Panel Junction Block Assembly (C/OPN Relay Input Voltage)

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: GO to next step 

1. Remove the integration relay and IG2 relay from the engine room No. 1 relay block.
2. Disconnect the instrument panel junction block connector.
3. Check the resistance.

   Standard resistance (Check for open) 

   TESTER CONNECTION SPECIFIED CONDITION
   
   

   Tester Connections	Specified Conditions
   IG2 relay 5 - IF-4	Below 1 Ω
   1A-4 - IB-11	Below 1 Ω

   Standard resistance (Check for short) 

   TESTER CONNECTION SPECIFIED CONDITION
   
   

   Tester Connections	Specified Conditions
   IF-4 - Body ground	10 kΩ or higher
   IB-11 - Body ground	10 kΩ or higher

4. Reinstall the integration relay and IG2 relay.
5. Reconnect the instrument panel junction block connector.

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

Fig 2: Checking Harness And Connector (Instrument Panel J/B - Integration Relay, IG2 Relay)

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

OK: GO TO ECM POWER SOURCE CIRCUIT 

1. Remove the instrument panel junction block.
2. Measure the C/OPN relay resistance.

   Standard resistance 

   TESTER CONNECTION SPECIFIED CONDITION
   
   

   Tester Connections	Specified Conditions
   IB-11 - IA-8	10 kΩ or higher
   	Below 1 Ω (when battery voltage Is applied to terminals IF-4 and IE-5)

   HINT:

   Relay coil circuit between IF-4 and IE-5 is not through IGN fuse.

3. Reinstall the instrument panel junction block.

NG: REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY 

Fig 3: Inspecting Instrument Panel Junction Block Assembly (C/OPN Relay)

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

OK: GO to next step 

1. Disconnect the A9 ECM connector.
2. Disconnect the IE connector from instrument panel junction block.
3. Measure the resistance.

   Standard resistance (Check for open) 

   TESTER CONNECTION SPECIFIED CONDITION
   
   

   Tester Connections	Specified Conditions
   IE-5 (Instrument panel J/B) - A9-7 (FC)	Below 1 Ω

   Standard resistance (Check for short) 

   TESTER CONNECTION SPECIFIED CONDITION
   
   

   Tester Connections	Specified Conditions
   IE-5 (Instrument panel J/B) or A9-7 (FC) - Body ground	10 kΩ or higher

4. Reconnect the instrument panel junction block and the ECM connectors.

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

Fig 4: Checking Harness And Connector (Instrument Panel J/B - ECM)

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

OK: GO to next step 

1. Check the harness and the connectors between the instrument panel junction block assembly and the fuel pump.
   1. Disconnect the IA instrument panel junction block connector.
   2. Disconnect the S1 fuel pump connector.
   3. Measure the resistance.

      Standard resistance (Check for open) 

      TESTER CONNECTION SPECIFIED CONDITION
      
      

      Tester Connections	Specified Conditions
      IA-8 (Instrument panel J/B) - S1-4 (Fuel pump)	Below 1Ω

      Standard resistance (Check for short) 

      TESTER CONNECTION SPECIFIED CONDITION
      
      

      Tester Connections	Specified Conditions
      IA-8 (Instrument panel J/B) or S1-4 (Fuel pump) - Body ground	10 kΩ or higher

2. Check the harness and the connectors between the fuel pump and the body ground.
   1. Disconnect the S1 fuel pump connector.
   2. Measure the resistance.

      Standard resistance (Check for open) 

      TESTER CONNECTION SPECIFIED CONDITION
      
      

      Tester Connections	Specified Conditions
      S1-5 (Fuel pump) - Body ground	Below 1 Ω

3. Reconnect the instrument panel junction block connector.
4. Reconnect the fuel pump connector.

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

Fig 5: Checking Harness And Connector (C/OPN Relay - Fuel Pump - Body Ground)

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

OK: GO to next step 

1. Inspect fuel pump resistance.
   1. Measure the resistance between the terminals.

      Standard resistance: 

      0.2 to 3.0 Ω at 20°C (68°F) 

2. Inspect fuel pump operation.
   1. Apply the battery voltage to both the terminals. Check that the pump operates.
      NOTE:

      • These tests must be done quickly (within 10 seconds) to prevent the coil from burning out.
      • Keep the fuel pump as far away from the battery as possible.
        Fig 6: Fuel Pump Front View

        Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      • Always turn the voltage on and off on the battery side, not the fuel pump side.

NG: REPLACE FUEL PUMP 

OK: REPLACE ECM 

1. Connect the intelligent tester to the DLC3.
2. Turn the ignition switch ON and turn the tester ON.
3. Select the following menu items: DIAGNOSIS / ENHANCED OBD II / DATA LIST / PRIMARY / STARTER SIG.
4. Check the result when the ignition switch is turned to ON and START.

OK 

NG: REPAIR OR REPLACE STARTING SYSTEM 

OK: GO to next step 

1. Connect the intelligent tester to the DLC3.
2. Turn the ignition switch ON and turn the tester ON.
3. Select the following menu items: DIAGNOSIS / ENHANCED OBD II / DATA LIST / PRIMARY / ENGINE SPD.
4. Read the values displayed on the tester while cranking.

   Standard: 

   Values are displayed continuously. 

NG: REPAIR OR REPLACE CRANKSHAFT POSITION SENSOR CIRCUIT 

OK: REPLACE ECM