Inspection Procedure

• Using Techstream, read the Data List.
  • Techstream

    Main Body 

    TECHSTREAM MAIN BODY REFERENCE CHART
    
    

    Tester Display	Measurement Item/Range	Normal Condition	Diagnostic Note
    IG SW	Ignition switch / ON or OFF	ON: Ignition switch ON OFF: Ignition switch OFF	-

    OK: When the ignition switch is operated, "ON" is displayed on the Techstream screen. 

NG: Go to step 2 

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

1. Remove the AM1 and ECU-IG No. 2 fuses from the main body ECU.
2. Measure the resistance according to the value(s) in the table below.

   Standard resistance 

   FUSE (AM1, ECU-IG No. 2)
   
   

   Tester Connection	Condition	Specified Condition
   AM1 fuse	Always	Below 1 Ω
   ECU-IG No. 2 fuse

NG: REPLACE FUSE 

OK: Go to Next Step 

1. Disconnect the DA main body ECU connector.
2. Measure the voltage according to the value(s) in the table below.

   Standard voltage 

   MAIN BODY ECU - BATTERY
   
   

   Tester Connection	Condition	Specified Condition
   DA-1 (IG) - Body ground	Always	11 to 14 V

   Fig 1: Identifying DA Main Body ECU Connector Terminals

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: Go to Next Step 

1. Remove the ignition switch.
   1. For 1GR-FE, refer to the following procedures (see INSPECTION ).
   2. For 2UZ-FE, refer to the following procedures (see INSPECTION ).
   3. For 3UR-FE, refer to the following procedures (see INSPECTION ).
2. Measure the resistance according to the value(s) in the table below.

   Standard resistance 

   IGNITION SWITCH
   
   

   Tester Connection	Switch Condition	Specified Condition
   1 (IG1) - 4 (AM1)	Ignition switch ON	Below 1 Ω

   Fig 2: Identifying Ignition Switch Connector Terminals

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   Result 

   STANDARD RESISTANCE RESULT CHART
   
   

   Result	Proceed to
   OK	A
   NG (for 1GR-FE)	B
   NG (for 2UZ-FE)	C
   NG (for 3UR-FE)	D

B: REPLACE IGNITION SWITCH  (See REMOVAL )

C: REPLACE IGNITION SWITCH  (See REMOVAL )

D: REPLACE IGNITION SWITCH  (See REMOVAL )

A: Go to Next Step 

1. Disconnect the DD main body ECU connector.
2. Disconnect the J9 ignition switch connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard resistance 

   MAIN BODY ECU - IGNITION SWITCH AND BODY GROUND
   
   

   Tester Connection	Condition	Specified Condition
   DD-47 - J9-4(AM1)	Always	Below 1 Ω
   DD-43 - J9-1 (IG1)
   DD-62 - Body ground
   DD-47 - Body ground	Always	10 kΩ or higher
   DD-43 - Body ground

   Fig 3: Checking Harness And Connector (Main Body ECU - Ignition Switch And Body Ground)

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: REPLACE MAIN BODY ECU