Inspection Procedure

1. Turn the power switch ON (IG).
2. Measure the voltage between the specified terminals of the E5 and E7 ECM connectors.

   Standard voltage 

   TESTER CONNECTION SPECIFIED CONDITION
   
   

   Tester Connection	Specified Condition
   E7-4 (+B) - E5-28 (E1)	9 to 14 V

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

Fig 1: Identifying E5 And E7 ECM Connectors Terminals

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: Go to next step. 

1. Disconnect the E5 ECM connector.
2. Measure the resistance according to the value(s) in the table below.

   Standard resistance (Check for open) 

   TESTER CONNECTION SPECIFIED CONDITION
   
   

   Tester Connection	Specified Condition
   E5-28 (E1) - Body ground	Below 1 Ω

3. Reconnect the ECM connector.

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

Fig 2: Identifying E5 ECM Connector

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

OK: Go to next step. 

1. Turn the power switch ON (IG).
2. Measure the voltage between the specified terminals of the E5 and E6 ECM connectors.

   Standard voltage 

   TESTER CONNECTION SPECIFIED CONDITION
   
   

   Tester Connection	Specified Condition
   E6-9 (IGSW) - E5-28 (E1)	9 to 14 V

OK:  Go to step  7

Fig 3: Identifying E5 And E6 ECM Connectors

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: Go to next step. 

1. Remove the IGN fuse from the driver side junction block.
2. Measure the resistance of the IGN fuse.

   Standard resistance: 

   Below 1 Ω 

3. Reinstall the IGN fuse.

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

Fig 4: Identifying Driver Side Junction Block

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

OK: Go to next step. 

1. Remove the integration relay from the engine room relay block.
2. Inspect the IG2 relay.

   Standard resistance 

   TESTER CONNECTION SPECIFIED CONDITION
   
   

   Tester Connection	Specified Condition
   3K-1 - 3I-4	10 kΩ or higher
   3K-1 - 3I-4	Below 1 Ω. (Apply battery voltage to terminals 3I-2 and 3I-3)

3. Reinstall the integration relay.

NG: REPLACE INTEGRATION RELAY 

Fig 5: Identifying Integration Relay And Connector Terminal

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

OK: 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 

3. Reinstall the AM2 fuse.

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

Fig 6: Identifying AM2 Fuse And Engine Room Relay Block

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

OK: CHECK AND REPAIR HARNESS AND CONNECTOR (BATTERY - IG2 RELAY, IG2 RELAY - ECM) 

1. Turn the power switch ON (IG).
2. Measure the voltage between the specified terminals of the E5 and E7 ECM connectors.

   Standard voltage 

   TESTER CONNECTION SPECIFIED CONDITION
   
   

   Tester Connection	Specified Condition
   E7-7 (MREL) - E5-28 (E1)	9 to 14 V

NG: REPLACE ECM 

Fig 7: Identifying E5 And E7 ECM Connectors

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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 

3. Reinstall the EFI fuse.

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

Fig 8: Identifying Engine Room Relay Block And EFI Fuse

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

OK: Go to next step. 

1. Remove the integration relay from the engine room relay block.
2. Inspect the EFI M relay.

   Standard resistance 

   TESTER CONNECTION SPECIFIED CONDITION
   
   

   Tester Connection	Specified Condition
   3K-1 - 3I-8	10 kΩ or higher
   3K-1 - 3I-8	Below 1 Ω (Apply battery voltage to terminals 3I-6 and 3I-7)

3. Reinstall the integration relay.

NG: REPLACE INTEGRATION RELAY 

Fig 9: Identifying Integration Relay And Connector Terminal

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

OK: Go to next step. 

1. Check the harness and connectors between the EFI M relay and ECM connector.
   1. Remove the integration relay from the engine room relay block.
      Fig 10: Identifying Engine Room Relay Block

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
   2. Disconnect the E7 ECM connector.
   3. Measure the resistance according to the value(s) in the table below.

      Standard resistance (Check for open) 

      TESTER CONNECTION SPECIFIED CONDITION
      
      

      Tester Connection	Specified Condition
      3I-6 (EFI M relay) - E7-7 (MREL)	Below 1 Ω

      Standard resistance (Check for short) 

      TESTER CONNECTION SPECIFIED CONDITION
      
      

      Tester Connection	Specified Condition
      3I-6 (EFI M relay) or E7-7 (MREL) - Body ground	10 kΩ or higher

      Fig 11: Identifying E7 ECM Connector Terminal

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
   4. Reinstall the integration relay.
   5. Reconnect the ECM connector.
2. Check the harness and the connectors between the EFI M relay and the body ground.
   1. Remove the integration relay from the engine room relay block.
   2. Measure the resistance between the wire harness side connector and body ground.

      Standard resistance (Check for open) 

      TESTER CONNECTION SPECIFIED CONDITION
      
      

      Tester Connection	Specified Condition
      3I-7 (EFI M relay) - Body ground	Below 1 Ω

   3. Reinstall the integration relay.

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: CHECK AND REPAIR HARNESS AND CONNECTOR (TERMINAL +B OF ECM - BATTERY POSITIVE TERMINAL)