Inspection Procedure

1. Turn the ignition switch to the ON position.
2. Measure the voltage between the terminals of the E5 and E7 ECM connectors.

   Standard voltage 

   TESTER CONNECTION SPECIFIED CONDITION
   
   

   Tester Connection	Specified Condition
   +B (E5-1) - E1 (E7-1)	9 to 14 V

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

Fig 1: Identifying ECM Connector Terminals

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: Go to Next Step 

1. Disconnect the E7 ECM connector.
2. Measure the resistance between the terminal of the ECM connector and body ground.

   Standard resistance: 

   Check for open 

   TESTER CONNECTION SPECIFIED CONDITION
   
   

   Tester Connection	Specified Condition
   E1 (E7-1) - Body ground	Below 1 Ω

3. Reconnect the ECM connector.

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

Fig 2: Identifying ECM Connector Terminal

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

OK: Go to Next Step 

1. Turn the ignition switch to the ON position.
2. Measure the voltage between the terminals of the E5 and E7 ECM connectors.

   Standard voltage 

   TESTER CONNECTION SPECIFIED CONDITION
   
   

   Tester Connection	Specified Condition
   IGSW (E5-9) - E1 (E7-1)	9 to 14 V

OK: Go to step  6

Fig 3: Identifying ECM Connector Terminals

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: Go to Next Step 

1. Remove the IGN fuse from the instrument panel J/B.
2. Measure the IGN fuse resistance.

   Standard resistance: 

   Below 1 Ω 

3. Reinstall the IGN fuse.

NG: CHECK FOR SHORTS IN ALL HARNESSES AND CONNECTORS CONNECTED TO FUSE AND REPLACE FUSE 

Fig 4: Identifying IGN Fuse Location

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

OK: Go to Next Step 

1. Inspect the ignition or starter switch assembly (See INSPECTION ).

NG: REPLACE IGNITION OR STARTER SWITCH ASSEMBLY  (See REMOVAL )

OK: Go to Next Step 

1. Turn the ignition switch to the ON position.
2. Measure the voltage between the terminals of the E5 and E7 ECM connectors.

   Standard voltage 

   TESTER CONNECTION SPECIFIED CONDITION
   
   

   Tester Connection	Specified Condition
   MREL (E5-8) - E1 (E7-1)	9 to 14 V

NG: REPLACE ECM  (See REMOVAL  )

Fig 5: Identifying ECM Connector Terminals

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

OK: Go to Next Step 

1. Remove the EFI No. 1 fuse from the fusible link block.
2. Measure the EFI No. 1 fuse resistance.

   Standard resistance: 

   Below 1 Ω 

3. Reinstall the EFI No. 1 fuse.

NG: CHECK FOR SHORTS IN ALL HARNESSES AND CONNECTORS CONNECTED TO FUSE AND REPLACE FUSE 

Fig 6: Identifying EFI No. 1 Fuse Location

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

OK: Go to Next Step 

1. Remove the EFI MAIN relay from the fusible link block.
2. Measure the EFI MAIN relay resistance.

   Standard resistance 

   TESTER CONNECTION SPECIFIED CONDITION
   
   

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

3. Reinstall the EFI MAIN relay.

NG: REPLACE EFI MAIN RELAY 

Fig 7: Identifying EFI Main Relay Terminals

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

OK: Go to Next Step 

1. Check the harness and connector between the EFI MAIN relay and ECM.
   1. Remove the EFI MAIN relay from the engine room R/B.
   2. Disconnect the E5 ECM connector.
   3. Measure the resistance between the terminals.

      Standard resistance: 

      Check for open 

      TESTER CONNECTION SPECIFIED CONDITION
      
      

      Tester Connection	Specified Condition
      EFI MAIN relay terminal (1) - MREL (E5-8)	Below 1 Ω

      Check for short 

      TESTER CONNECTION SPECIFIED CONDITION
      
      

      Tester Connection	Specified Condition
      EFI MAIN relay terminal (1) or MREL (E5-8) - Body ground	10 kΩ or higher

2. Check the harness and connector between the EFI MAIN relay and body ground.
   1. Measure the resistance between the terminals.

      Standard resistance : 

      Check for open 

      TESTER CONNECTION SPECIFIED CONDITION
      
      

      Tester Connection	Specified Condition
      EFI MAIN relay terminal (2) - Body ground	Below 1 Ω

   2. Reinstall the engine room R/B.
   3. Reconnect the ECM connector.

OK: REPAIR OR REPLACE HARNESS OR CONNECTOR 

Fig 8: Identifying EFI Main Relay And ECM Connector Terminals

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: CHECK AND REPLACE HARNESS AND CONNECTOR (TERMINAL +B OF ECM - BATTERY POSITIVE TERMINAL)