Downhill Assist Control Indicator Light does not Come ON [11/2018 - 10/2022]: Procedure

1. Turn the ignition switch off.
2. Remove the downhill assist control switch (integration control and panel assembly).

   Refer to REMOVAL [11/2018 - ]

3. Inspect the downhill assist control switch (integration control and panel assembly).

   Refer to INSPECTION [11/2018 - ]

   OK

   The downhill assist control switch operates normally.

   Result

   Result
   OK
   NG

Result: 

NG 

REPLACE INTEGRATION CONTROL AND PANEL ASSEMBLY. Refer to  REMOVAL [11/2018 - ] 

Result: 

OK 

See step  2

1. Disconnect the A39 skid control ECU (brake actuator assembly) connector.
2. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   A39-8 (HDCS) - G32-19 (B)	Always	Below 1 Ω
   A39-8 (HDCS) or G32-19 (B) - Body ground	Always	10 kΩ or higher
   G32-16 (E) - Body ground	Always	Below 1 Ω

   Result

   Result
   OK
   NG

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

Result: 

OK 

See step  3

1. Turn the ignition switch off.
2. Perform Active Test of the combination meter assembly using the Techstream.

   Refer to DATA LIST / ACTIVE TEST [11/2018 - 08/2020] , or refer to DATA LIST / ACTIVE TEST [08/2020 - 10/2022]

   Body Electrical > Combination Meter > Active Test 

   Tester Display
   Downhill Assist Control Indicator

3. Check the combination meter assembly.

   OK

   The Downhill assist control indicator light turns on or off in accordance with the Techstream.

   Result

   Proceed to
   OK
   NG

Result: 

OK 

REPLACE BRAKE ACTUATOR ASSEMBLY. Refer to  REMOVAL [11/2018 - 10/2019]  , or refer to  REMOVAL [10/2019 - 08/2020]  , or refer to  REMOVAL [08/2020 - 10/2022] 

Result: 

NG 

INSPECT METER / GAUGE SYSTEM. Refer to  HOW TO PROCEED WITH TROUBLESHOOTING [11/2018 - ]