Active Noise Control ECU Communication Stop Mode [06/2018 - 09/2022]: Procedure

1. Disconnect the cable from the negative (-) battery terminal.
2. Disconnect the G15 stereo component equalizer assembly connector.
3. Measure the resistance according to the value(s) in the table below.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   *a	Front view of wire harness connector (to Stereo Component Equalizer Assembly)

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   G15-1 (CANH) - G15-15 (CANL)	Cable disconnected from negative (-) battery terminal	54 to 69 Ω

   Result

   Proceed to
   OK
   NG

Result: 

NG 

REPAIR OR REPLACE CAN BRANCH LINES OR CONNECTOR (STEREO COMPONENT EQUALIZER ASSEMBLY) 

Result: 

OK 

See step  2

1. Measure the resistance according to the value(s) in the table below.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   *a	Front view of wire harness connector (to Stereo Component Equalizer Assembly)

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   G15-28 (GND) - Body ground	Cable disconnected from negative (-) battery terminal	Below 1 Ω

2. Reconnect the cable to the negative (-) battery terminal.
3. Measure the voltage according to the value(s) in the table below.

   Standard Voltage

   Tester Connection	Condition	Specified Condition
   G15-13 (ACC) - Body ground	Engine switch on (ACC)	11 to 14 V
   G15-14 (+B) - Body ground	Always	11 to 14 V
   G15-27 (IGN) - Body ground	Engine switch on (IG)	11 to 14 V

   Result

   Proceed to
   OK
   NG

Result: 

OK 

REPLACE STEREO COMPONENT EQUALIZER ASSEMBLY. Refer to  REMOVAL [06/2018 - ] 

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR (POWER SOURCE CIRCUIT)