Inspection Procedure

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

   Standard voltage 

   ECM (+B VOLTAGE)
   
   

   Tester Connection	Specified Condition
   E9-1 (+B) - E7-1 (E1)	9 to 14 V

   Fig 1: Checking ECM (+B Voltage)

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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

NG: GO TO NEXT STEP 

1. Disconnect the E7 ECM connector.
2. Measure the resistance of the wire harness side connector.

   Standard resistance 

   ECM - BODY GROUND
   
   

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

   Fig 2: Checking Harness & Connector (ECM - Body Ground)

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: GO TO NEXT STEP 

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

   Standard voltage 

   IGSW VOLTAGE
   
   

   Tester Connection	Specified Condition
   E9-9 (IGSW) - E7-1 (E1)	9 to 14 V

   Fig 3: Checking ECM (IGSW Voltage)

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   NG: Go to step   6 

   NG: GO TO NEXT STEP 

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

   Standard resistance: Below 1 Ω 

Fig 4: Inspecting Fuse (IGN)

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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

OK: GO TO NEXT STEP 

1. Remove the I18 ignition switch connector.
2. Measure the resistance of the ignition switch.

   Standard resistance 

   IGNITION SWITCH ASSEMBLY
   
   

   Switch position	Tester Connection	Specified Condition
   ON	6-7	Below 1 Ω
   START	6-7	Below 1 Ω

   Fig 5: Inspecting Ignition Switch Assembly

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPLACE IGNITION SWITCH ASSEMBLY 

OK: REPAIR OR REPLACE 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 

   ECM (MREL VOLTAGE)
   
   

   Tester Connection	Specified Condition
   E9-8 (MREL) - E7-1 (E1)	9 to 14 V

   Fig 6: Checking ECM (MREL Voltage)

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPLACE ECM 

OK: GO TO NEXT STEP 

1. Remove the EFI OR ECD NO. 1 fuse from the engine room junction block.
2. Measure the resistance of the EFI OR ECD NO. 1 fuse.

   Standard resistance: Below 1 Ω 

   Fig 7: Inspecting Fuse (EFI Or ECD No. 1)

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: CHECK FOR SHORT IN ALL HARNESS AND COMPONENTS CONNECTED TO EFI OR ECD NO. 1 FUSE, AND REPLACE EFI OR ECD FUSE 

OK: GO TO NEXT STEP 

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

   Standard resistance 

   EFI RELAY
   
   

   Terminal Connection	Specified Condition
   1 - 3	10 kΩ or higher
   1 - 3	Below 1 Ω (when battery voltage is applied to terminals 2 and 4)

   Fig 8: Inspecting EFI Relay

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPLACE EFI RELAY 

OK: GO TO NEXT STEP 

1. Check harness and connector (see ELECTRONIC CIRCUIT INSPECTION PROCEDURE ).

OK: REPAIR OR REPLACE HARNESS OR CONNECTOR 

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