GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Chevrolet 🢒 2007 🢒 Impala 🢒 DTC 🢒 DTC B1422

Circuit Description

DTC B1422 will set if the voltage to the 8-volt ARS power supply falls below 8.3 volts.

DTC Descriptor

This diagnostic procedure supports the following DTC:

DTC B1422 Device Power Moding Error

Conditions for Running the DTC

This test is run every 300 milliseconds.

Conditions for Setting the DTC

The antenna module detects that the voltage has dropped below 8.3 volts for 80 msec.

Conditions for Clearing the DTC

The DTC is cleared when the antenna module detects that the voltage is back above 8.8 volts.

Step

Action

Yes

No

Schematic Reference: Radio/Navigation System Schematics

Connector End Views Reference: Entertainment/Communication Connector End Views

1

DId you perform the Diagnostic System Check - Vehicle?

Go to Step 2

Go to Diagnostic System Check - Vehicle

2

  1. Install a scan tool.
  2. Turn ON the ignition, with the engine OFF.
  3. With a scan tool clear the DTC.

Does the DTC reset?

Go to Step 3

System OK

3

Replace the antenna module. Refer to Control Module References for replacement, setup, and programming.

Did you complete the replacement?

Go to Step 4

--

4
  1. Install a scan tool.
  2. Turn ON the ignition, with the engine OFF.
  3. With a scan tool clear the DTC.

Does the DTC reset?

Go to Step 2

System OK