Inspection Procedure

1. Use the Data List to check if the ACC relay is functioning properly
   1. Intelligent tester

      MAIN BODY 

      DATA LIST - MAIN BODY
      
      

      Tester Display	Measurement Item/Range	Normal Condition	Diagnostic Note
      ACC RELAY MON	D-ACC relay monitor/ON or OFF	ON: Power switch ON (IG) OFF: Power switch OFF	-

   2. Techstream

      Main Body 

      DATA LIST - MAIN BODY
      
      

      Tester Display	Measurement Item/Range	Normal Condition	Diagnostic Note
      ACC Relay Monitor	D-ACC relay monitor/ON or OFF	ON: Power switch ON (IG) OFF: Power switch OFF	-

      OK: When the power switch is turned ON (IG), ON is displayed on the tester. 

NG:  Go to step  3

OK: Go to next Step 

1. Ensure the key is inside the cabin.
2. With the brake pedal released, check that the power source mode changes as shown below each time the power switch is pushed

   OK: OFF → ON (ACC) → ON (IG) → OFF 

NG: Go to SMART ACCESS SYSTEM WITH PUSH-BUTTON START  , (See POWER SOURCE MODE DOES NOT CHANGE )

OK: USE SIMULATION METHOD TO CHECK  (See HOW TO PROCEED WITH TROUBLESHOOTING )

Fig 1: Identifying L13, DF And DA Main Body ECU Connectors

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. Disconnect the L13, DF and DA main body ECU connectors.
2. Measure the voltage and resistance according to the value (s) in the table below.

   Standard voltage 

   STANDARD VOLTAGE SPECIFICATION
   
   

   Tester Connection	Condition	Specified Condition
   DM - Body ground	Always	11 to 14 V

   Standard resistance 

   STANDARD RESISTANCE SPECIFICATION
   
   

   Tester Connection	Condition	Specified Condition
   L13-22 (ACCD) - DA-19	Always	Below 1 Ω
   DA-40 (GND1) - Body ground	Always	Below 1 Ω
   L13-22 (ACCD) or DA-19 - Body ground	Always	10 kΩ or higher

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: REPLACE MAIN BODY ECU