DTC B1422. Cadillac CTS

For 1990-2009 cars only

Makes 🢒 Cadillac 🢒 2003 🢒 CTS - RHD 🢒 DTC 🢒 DTC B1422

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

This test is run every 300 milliseconds.

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

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/Audio System Schematics Connector End Views Reference: Entertainment Connector End Views
1	DId you perform the Diagnostic System Check - Entertainment System?	Go to Step 2	Go to Diagnostic System Check - Radio/Audio System
2	Install a scan tool. Turn ON the ignition, with the engine OFF. With a scan tool clear the DTC. Does the DTC Reset?	Go to Step 3	System OK
3	Important: Always perform the transmitter programming procedure for the radio antenna module. Refer to Transmitter Programming in Keyless Entry. Replace the antenna module. Refer to Radio Antenna Module Replacement . Did you complete the replacement?	Go to Step 4	--
4	Install a scan tool. Turn ON the ignition, with the engine OFF. With a scan tool clear the DTC. Does the DTC Reset?	Go to Step 2	System OK