Inspection Procedure

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

   Main Body 

   TESTER DISPLAY REFERENCE
   
   

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

   OK: When the engine switch is turned on (IG), ON is displayed on the Techstream. 

NG: Go to step  3

OK: Go to Next Step 

1. Ensure the key is inside the cabin.
2. Check that the power source mode changes as shown below each time the engine switch is pushed.

   OK: off → on (ACC) → on (IG) → off 

NG: GO TO POWER SOURCE MODE DOES NOT CHANGE 

OK: NORMAL 

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 resistance and voltage according to the value (s) in the table below.

   Standard resistance 

   STANDARD RESISTANCE SPECIFICATION
   
   

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

   Standard voltage 

   STANDARD VOLTAGE SPECIFICATION
   
   

   Tester Connection	Condition	Specified Condition
   DF-1 - Body ground	Always	11 to 14 V

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: REPLACE MAIN BODY ECU