Inspection Procedure

1. Turn the ignition switch on.
2. Measure the voltage between the terminals of the E6 and E8 ECM connectors.

   Standard voltage 

   VOLTAGE SPECIFICATION TABLE
   
   

   Tester Connections	Specified Conditions
   +B (E8-1) - E1 (E6-1)	9 to 14 V

   Fig 1: Identifying E6 & E8 ECM Connector Terminals

   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 E6 ECM connector.
2. Measure the resistance between the terminal of the ECM connector and body ground.

   Standard resistance (Check for open) 

   RESISTANCE SPECIFICATION TABLE
   
   

   Tester Connections	Specified Conditions
   E1 (E6-1) - Body ground	Below 1 Ω

3. Reconnect the ECM connector.
   Fig 2: Identifying E6 ECM Connector

   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 between the terminals of the E6 and E8 ECM connectors.

   Standard voltage 

   VOLTAGE SPECIFICATION TABLE
   
   

   Tester Connections	Specified Conditions
   IGSW (E8-9) - E1 (E6-1)	9 to 14 V

   Fig 3: Identifying E6 & E8 ECM Connector Terminals

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

OK:  Go to step  6

NG: Go to Next Step. 

1. Remove the IGN fuse from the driver side J/B.
2. Measure the IGN fuse resistance.

   Standard resistance: Below 1 Ω 

3. Reinstall the IGN fuse.
   Fig 4: Identifying IGN Fuse

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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

OK: Go to Next Step. 

1. Disconnect the I18 ignition switch connector.
2. Check the resistance.

   Standard resistance 

   RESISTANCE SPECIFICATION TABLE
   
   

   Ignition Switch Positions	Tester Conditions	Specified Conditions
   LOCK	All Terminals	10 kΩ or higher
   ACC	2-3	Below 1 Ω
   ON	2-3-4, 6-7	Below 1 Ω
   START	1-2-4, 6-7-8	Below 1 Ω

3. Reconnect the ignition switch connector.
   Fig 5: Identifying I18 Ignition Switch Connector Terminals

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPLACE IGNITION OR STARTER SWITCH ASSEMBLY 

OK: CHECK HARNESS AND CONNECTOR (BATTERY - IGNITION SWITCH, IGNITION SWITCH - ECM) 

1. Turn the ignition switch on.
2. Measure the voltage between the terminals of the E6 and E8 ECM connectors.

   Standard voltage 

   VOLTAGE SPECIFICATION TABLE
   
   

   Tester Connections	Specified Conditions
   MREL (E8-8) - E1 (E6-1)	9 to 14 V

   Fig 6: Identifying E6 & E8 ECM Connector Terminals

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPLACE ECM 

OK: Go to Next Step. 

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

   Standard resistance: Below 1 Ω 

3. Reinstall the EFI fuse.
   Fig 7: Identifying EFI Fuse

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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

OK: Go to Next Step. 

1. Remove the EFI relay from the engine room R/B.
2. Check the EFI relay resistance.

   Standard resistance 

   RESISTANCE SPECIFICATION TABLE
   
   

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

3. Reinstall the EFI relay.
   Fig 8: Identifying EFI Relay Terminals

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPLACE EFI RELAY 

OK: Go to Next Step. 

1. Check the harness and connector between the EFI relay and ECM.
   1. Remove the EFI relay from the engine room R/B.
   2. Disconnect the E8 ECM connector.
   3. Measure the resistance between the terminals of the ECM connector and EFI relay terminal.

      Standard resistance (Check for open) 

      RESISTANCE SPECIFICATION TABLE
      
      

      Tester Connections	Specified Conditions
      EFI relay (1) - MREL (E8-8)	Below 1 Ω

      Standard resistance (Check for short) 

      RESISTANCE SPECIFICATION TABLE
      
      

      Tester Connections	Specified Conditions
      EFI relay (1) or MREL (E8-8) - Body ground	10 kΩ or higher

2. Check the harness and connector between the EFI relay and body ground.
   1. Measure the resistance between the terminal of the EFI relay and body ground.

      Standard resistance (Check for open) 

      RESISTANCE SPECIFICATION TABLE
      
      

      Tester Connections	Specified Conditions
      EFI relay (2) - Body ground	Below 1 Ω

      Fig 9: Identifying ECM & EFI Relay Terminals

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
   2. Reinstall the EFI relay.
   3. Reconnect the ECM connector.

OK: REPAIR OR REPLACE HARNESS OR CONNECTOR 

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