Inspection Procedure

1. Connect Techstream to the DLC3.
2. Turn the power switch on (IG) and turn Techstream main switch on.
3. Select the item below in the Data List, and read the display on the tester.

   HINT:

   When using Techstream with the power switch off, turn on and off any of the door courtesy light switches repeatedly at 1.5 second intervals or less until communication between the tester and vehicle starts.

   Main Body: 

   DATA LIST AND MAIN BODY
   
   

   Tester Display	Measurement Item/Range	Normal Condition	Diagnostic Note
   IG1 Relay Monitor (Outside)	Status of IG1 relay monitor (outer) / ON or OFF	ON: Power switch on (IG) (IG1 relay is ON) OFF: Power switch off (IG1 relay is OFF)	-

   OK: 

   "ON" (power switch on (IG)) appears on the screen. 

   NG:  Go to step  3

   OK: Go to Next Step 

1. Check the power source mode change.
   1. When the key is inside the vehicle and the shift lever is in the P position, check that pressing the power switch causes the power source mode to change as follows:

      OK: 

      off → on (ACC) → on (IG) → off 

      HINT:

      • If power mode does not change to ON (IG and ACC) (See POWER SOURCE MODE DOES NOT CHANGE TO ON (IG AND ACC) ).
      • If power mode does not change to ON (IG) (See POWER SOURCE MODE DOES NOT CHANGE TO ON (IG) ).

      NG: Go to OTHER PROBLEM 

      OK: Go to Next Step 

1. Remove the IG1 relay from the instrument panel J/B.
2. Measure the resistance according to the value (s) in the table below.

Standard resistance 

Fig 1: Identifying Relay Connector Terminals

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPLACE RELAY 

OK: Go to Next Step 

1. Disconnect the II J/B connector.
   Fig 2: Identifying Wire Harness (Instrument Panel J/B - Main Body ECU)

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Disconnect the E7 ECU connector.
3. Measure the resistance according to the value (s) in the table below.

Standard resistance 

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: Go to Next Step 

1. Disconnect the IF and IA J/B connectors.
2. Measure the resistance according to the value (s) in the table below.

   Standard resistance 

   RESISTANCE SPECIFICATION
   
   

   Terminal No.	Condition	Specified value
   IF-10 - Body ground	Always	Below 1 Ω

3. Measure the voltage according to the value (s) in the table below.

   Standard voltage 

   VOLTAGE SPECIFICATION
   
   

   Terminal No.	Condition	Specified value
   IA-1 - Body ground	Always	10 to 14 V

   Fig 3: Identifying Wire Harness (Instrument Panel J/B - Battery And Body Ground)

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

   OK: Go to Next Step 

1. Measure the resistance according to the value (s) in the table below.
   Fig 4: Identifying Instrument Panel J/B

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   Standard resistance 

   RESISTANCE SPECIFICATION
   
   

   Terminal No.	Condition	Specified Value
   IF-10 - IG1 relay terminal-1	Always	Below 1 Ω
   M-9 - IG1 relay terminal-2	Always	Below 1 Ω
   IF-10-Body ground	Always	10 kΩ or higher
   I1-9 - Body ground	Always	10 kΩ or higher

   NG: REPLACE INSTRUMENT PANEL J/B 

   OK: REPLACE MAIN BODY ECU