The IPC monitors the steering wheel controls HVAC (cellular phone) keys (switches) input at the IPC connector C2 terminal B11. The IPC interprets the switch commands and issues the appropriate class 2 message.

The IPC determines that one or more of the following switches is active for more than 12.5 seconds:

1. Inspect the steering wheel control keys for one of the following conditions:

•

Binding

•

Sticking

•

Broken

2. Each steering wheel control key (switch) has a unique counts value. Measure these counts with the following procedure:

2.1.	Connect a scan tool.

2.2.	Press each switch and view the steering wheel controls data list parameter.

2.3.	Use the table below for the correct value.

3. Each steering wheel control key (switch) has a unique resistance. Measure these resistance values with the following procedure:

3.1.	Disconnect C202.

3.2.	Connect a DMM to the steering column harness terminals A1 and A4.

3.3.	Press each key and measure the resistance.

3.4.	Use the table below for the correct value.