Inspection Procedure

1. Turn the ignition switch ON.
2. Measure the voltage between the terminals of the ECM connectors.

   Standard voltage 

   TESTER CONNECTION SPECIFIED CONDITION CHART
   
   

   Tester Connection	Specified Condition
   +B (E6-1) - E1 (E3-3)	9 to 14 V

OK : PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE 

Fig 1: Inspecting ECM (+B Voltage)

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NG : GO TO NEXT STEP 

1. Disconnect the negative (-) battery cable.
2. Disconnect the E3 ECM connector.
3. Measure the resistance of the wire harness side connector.

   Standard resistance (Check for open) 

   TESTER CONNECTION SPECIFIED CONDITION CHART
   
   

   Tester Connection	Specified Condition
   E1 (E3-3) - Body ground	Below 1 Ω

NG : REPAIR OR REPLACE HARNESS OR CONNECTOR 

Fig 2: Disconnecting E3 ECM Connector

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OK : GO TO NEXT STEP 

1. Turn the ignition switch ON.
2. Measure the voltage of the ECM connectors.

   Standard voltage 

   TESTER CONNECTION SPECIFIED CONDITION CHART
   
   

   Tester Connection	Specified Condition
   IGSW (E6-9) - E1 (E3-3)	9 to 14 V

OK : Go to step   6 

Fig 3: Inspecting ECM (IGSW Voltage)

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NG : GO TO NEXT STEP 

1. Remove the AM2 fuse from the engine room relay block.
2. Measure the resistance of the AM2 fuse.

   Standard resistance: Below 1 Ω 

NG : CHECK FOR SHORT IN ALL HARNESSES AND COMPONENTS CONNECTED TO FUSE 

Fig 4: Removing AM2 Fuse From Engine Room Relay Block

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OK : GO TO NEXT STEP 

1. Disconnect the I10 ignition switch connector.
2. Measure the resistance of the ignition switch.

   Standard resistance 

   TESTER CONNECTION SPECIFIED CONDITION CHART
   
   

   Ignition Switch Position	Tester Connection	Specified Condition
   LOCK	All Terminals	10 kΩ or higher
   ON	AM2 (5) - IG2 (6)	Below 1 Ω

NG : REPLACE IGNITION SWITCH ASSEMBLY 

Fig 5: Disconnecting I10 Ignition Switch Connector

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OK : CHECK HARNESS OR CONNECTOR (BATTERY - IGNITION SWITCH, IGNITION SWITCH - ECM) 

1. Turn the ignition switch ON.
2. Measure the voltage of the ECM connectors.

   Standard voltage 

   TESTER CONNECTION SPECIFIED CONDITION CHART
   
   

   Tester Connection	Specified Condition
   MREL (E6-8) - E1 (E3-3)	9 to 14 V

NG : REPLACE ECM 

Fig 6: Inspecting ECM (MREL Voltage)

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OK : GO TO NEXT STEP 

1. Remove the EFI fuse from the engine room relay block.
2. Measure the resistance of the EFI fuse.

   Standard resistance: Below 1 Ω 

NG : CHECK FOR SHORT IN ALL HARNESSES AND COMPONENTS CONNECTED TO FUSE 

Fig 7: Removing EFI Fuse From Engine Room Relay Block

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

OK : GO TO NEXT STEP 

1. Remove the EFI relay from the engine room relay block.
2. Measure the resistance of the EFI fuse.

   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)

NG : REPLACE EFI RELAY 

Fig 8: Inspecting EFI Relay

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OK : GO TO NEXT STEP 

1. Check the harness and connector between the EFI relay and ECM.
   1. Remove the EFI relay from the engine room relay block.
      Fig 9: Identifying EFI Relay And ECM Connector Terminals

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
   2. Disconnect the E6 ECM connector.
   3. Measure the resistance of the wire harness side connectors.

      Standard resistance (Check for open) 

      TESTER CONNECTION SPECIFIED CONDITION CHART
      
      

      Tester Connections	Specified Conditions
      Engine room relay block (EFI relay terminal 2) - MREL (E6-8)	Below 1 Ω
      Engine room relay block (EFI relay terminal 3) - +B (E6-1)	Below 1 Ω

      Standard resistance (Check for short) 

      TESTER CONNECTION SPECIFIED CONDITION CHART
      
      

      Tester Connections	Specified Conditions
      Engine room relay block (EFI relay terminal 2) or MREL (E6-8) - Body ground	10 kΩ or higher
      Engine room relay block (EFI relay terminal 3) or +B (E6-1) - Body ground	10 kΩ or higher

      Fig 10: Disconnecting E6 ECM Connector

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Check the harness and connector between the EFI relay and body ground.
   1. Remove the EFI relay from the engine room relay block.
   2. Measure the resistance of the wire harness side connector.

      Standard resistance (Check for open) 

      TESTER CONNECTION SPECIFIED CONDITION CHART
      
      

      Tester Connection	Specified condition
      Engine room relay block (EFI relay terminal 1) - Body ground	Below 1 Ω

NG : REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK : CHECK AND REPLACE HARNESS OR CONNECTOR (TERMINAL 5 OF EFI RELAY - BATTERY POSITIVE TERMINAL)