Inspection Procedure

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

   Voltage 

   ECM (+B VOLTAGE)
   
   

   Tester connection	Specified Condition
   E4-1 (+B) - E6-1 (E1)	9 to 14 V

   Fig 1: Inspecting ECM (+B Voltage)

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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

NG: GO TO NEXT STEP 

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

   Resistance 

   ECM - BODY GROUND
   
   

   Tester connection	Specified Condition
   E6-1 (E1) - Body ground	Below 1 ohms

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

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPAIR OR REPLACE HARNESS AND CONNECTOR 

OK: GO TO NEXT STEP 

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

   Voltage 

   ECM (IGSW VOLTAGE)
   
   

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

   Fig 3: Inspecting ECM (IGSW Voltage)

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

OK: Go to step   6 

NG: GO TO NEXT STEP 

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

   Resistance: Below 1 ohms 

Fig 4: Checking IG2 Fuse

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPLACE FUSE 

OK: GO TO NEXT STEP 

1. Measure the resistance of the switch terminals shown in IGNITION OR STARTER SWITCH ASSEMBLY  .

   Resistance 

   IGNITION OR STARTER SWITCH ASSEMBLY
   
   

   Tester connection	Switch Condition	Specified Condition
   6 (IG2) - 7 (AM2)	LOCK	10 k ohms or higher
   6 (IG2) - 7 (AM2)	ON	Below 1 ohms

   Fig 5: Inspecting Ignition Or Starter Switch Assembly

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPLACE IGNITION OR STARTER SWITCH ASSEMBLY 

OK: CHECK AND REPLACE HARNESS AND CONNECTOR (IGNITION SWITCH ASSEMBLY - ECM) 

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

   Voltage 

   ECM (MREL VOLTAGE)
   
   

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

   Fig 6: Inspecting ECM (MREL Voltage)

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPLACE ECM 

OK: GO TO NEXT STEP 

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

   Resistance: Below 1 ohms 

NG: REPLACE FUSE 

OK: GO TO NEXT STEP 

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

   Resistance 

   EFI RELAY
   
   

   Tester connection	Specified Condition
   3 - 5	10 k ohms or higher
   3 - 5	Below 1 ohms (when battery voltage is applied to terminals 1 and 2)

   Fig 7: Inspecting EFI Relay

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPLACE RELAY 

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.

      Resistance 

      EFI RELAY AND ECM
      
      

      Tester connection	Specified Condition
      J/B EFI relay terminal 1 - E4-8 (MREL)	Below 1 ohms
      J/B EFI relay terminal 1 or E4-8 (MREL) - Body ground	10 k ohms 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.

      Resistance 

      EFI RELAY AND BODY GROUND
      
      

      Tester connection	Specified Condition
      J/B EFI relay terminal 2 - Body ground	Below 1 ohms

      Fig 8: Checking Wire Harness (EFI Relay - ECM, EFI Relay - Body Ground)

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPAIR OR REPLACE HARNESS AND CONNECTOR 

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