Inspection Procedure

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

Standard: 

Fig 1: Checking ECM (+B Voltage)

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1. OK : PROCEED TO NEXT CIRCUIT INSPECTION SHOWN ON PROBLEM SYMPTOMS TABLE (See  PROBLEM SYMPTOMS TABLE  ) 
2. NG : Go To Next Step. 

1. Disconnect the E6 ECM connector.
2. Measure the resistance of the wire harness side connectors.

   Standard: 

   SPECIFIED CONDITION
   
   

   Tester Connection	Specified Condition
   E6-1 (E1) - Body ground	Below 1 Ω

   Fig 2: Checking Wire Harness (ECM - Body Ground)

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1. NG : REPAIR OR REPLACE HARNESS AND CONNECTOR 
2. OK : Go To Next Step. 

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

   Standard: 

   SPECIFIED CONDITION
   
   

   Tester Connection	Specified Condition
   E4-9 (IGSW) - E6-1 (E1)	9 to 14 V

   Fig 3: Checking ECM (IGSW Voltage)

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1. OK : Go to step   6 
2. NG : Go To Next Step. 

1. Remove the IG2 fuse from the engine room J/B.
2. Measure the resistance of the IG2 fuse.

   Standard: Below 1 Ω 

   Fig 4: Removing IG2 Fuse From Engine Room J/B

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1. NG : REPLACE FUSE 
2. OK : Go To Next Step. 

1. Measure the resistance of the switch terminals shown in the chart below.

   Standard: 

   SPECIFIED CONDITION
   
   

   Tester Connection	Switch Condition	Specified Condition
   6 (IG2) - 7 (AM2)	LOCK	10 kΩ or higher
   6 (IG2) - 7 (AM2)	ON	Below 1 Ω

   Fig 5: Inspecting Ignition Or Starter Switch Assy Terminal

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1. NG : REPLACE IGNITION OR STARTER SWITCH ASSY 
2. OK : CHECK AND REPAIR HARNESS AND CONNECTOR (BATTERY - IGNITION SWITCH, IGNITION SWITCH - ECM) 

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

   Standard: 

   SPECIFIED CONDITION
   
   

   Tester Connection	Specified Condition
   E4-8 (MREL) - E6-1 (E1)	9 to 14 V

   Fig 6: Checking ECM (MREL Voltage)

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1. NG : REPLACE ECM (See  REPLACEMENT  ) 
2. OK : Go To Next Step. 

1. Remove the EFI fuse from the engine room J/B.
2. Measure the resistance of the EFI fuse.

   Standard: Below 1 Ω 

1. NG : REPLACE FUSE 
2. OK : Go To Next Step. 

1. Remove the EFI relay from the engine room J/B.
2. Measure the resistance of the EFI relay.

   Standard: 

   SPECIFIED CONDITION
   
   

   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)

   Fig 7: Removing EFI Relay From Engine Room J/B

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. NG : REPLACE RELAY 
2. OK : Go To Next Step. 

1. Check the wire harness between the EFI relay and ECM.
   1. Remove the EFI relay from the engine room J/B.
   2. Disconnect the E4 ECM connector.
   3. Measure the resistance of the wire harness side connectors.

   Standard: 

   SPECIFIED CONDITION
   
   

   Tester Connection	Specified Condition
   J/B EFI relay terminal 1 - E4-8 (MREL)	Below 1 Ω
   J/B EFI relay terminal 1 or E4-8 (MREL) - Body ground	10 kΩ or higher

2. Check the wire harness between the EFI relay and body ground.
   1. Remove the EFI relay from the engine room J/B.
   2. Measure the resistance between the wire harness side connector.

   Standard: 

   SPECIFIED CONDITION
   
   

   Tester Connection	Specified Condition
   J/B EFI relay terminal 2 - Body ground	Below 1 Ω

   Fig 8: Measuring Resistance Of Wire Harness Side Connectors

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. OK : REPAIR OR REPLACE HARNESS AND CONNECTOR 
2. NG : CHECK AND REPAIR HARNESS AND CONNECTOR (TERMINAL +B OF ECM - BATTERY POSITIVE TERMINAL)