Components

Removal
Caution:
Wait at least 90 seconds after disconnecting the cable from the negative (-) battery terminal to prevent airbag and seat belt pretensioner activation.

Inspection

Standard resistance 
If the result is not as specified, replace the switch.
Then check that the bulb illuminates.
Ok: bulb illuminates.
If the result is not as specified, replace the switch.
Installation

Downhill assist control switchTerminals of ecu (2005/11-2006/01)
Check air conditioning amplifier
Measure the voltage and resistance of the
connectors.
Hint:
Check from the rear of the connector while it is
connected to the air conditioning amplifier.
using an oscilloscope, check waveform 1.
Can communication signal
Hint:
...
If the electronic key does
not operate properly
(vehicles with a
smart key system)
If communication between the electronic key and vehicle is
interrupted („_p. 107) Or the electronic key cannot be used
because the battery is depleted, the smart key system and wireless
remote control cannot be used. In such cases, the doors
can be opened and the engine can be started by follo ...
System voltage
Description
The battery supplies electricity to the ecm even when the ignition switch is
in the off position. This
power allows the ecm to store data such as dtc history, freeze frame data and
fuel trim values. If the
battery voltage falls below a minimum level, the memory is cleared and ...