Test Description

WARNING: This page is about a different car, the 2007 Cadillac STS. However, it is still accessible from the selected car via links, so may be relevant.

The numbers below refer to the step numbers on the diagnostic table.

2: This step verifies that proper operation of the keyless entry console active antenna

DTC B3122

Step	Action	Values	Yes	No
Schematic Reference: Remote Function Schematics Connector End View Reference: Remote Function Connector End Views
1	Did you perform the Diagnostic System Check - Vehicle?	-	Go to Step 2	Go to Diagnostic System Check - Vehicle
2	Install a scan tool. Place the keyless entry transmitter in the fob pocket located within the center console. In the remote control door lock receiver (RCDLR) output controls menu, select Active Antenna Attempt to authenticate the Active Antenna Does the Active Antenna authenticate?	-	Go to Testing for Intermittent Conditions and Poor Connections	Go to Step 3
3	At the RCDLR, measure the voltage of the Keyless Entry Active Antenna Supply Voltage circuit with a DMM. Does the voltage equal the specified value?	0 V	Go to Step 4	Go to Step 7
4	At the RCDLR, measure the voltage of the Keyless Entry Active Antenna Data Signal circuit with a DMM. Does the voltage equal the specified value?	0 V	Go to Step 5	Go to Step 8
5	At the RCDLR, measure the voltage of the Keyless Entry Active Antenna Clock Signal circuit with a DMM. Does the voltage equal the specified value?	0 V	Go to Step 9	Go to Step 6
6	At the RCDLR, measure the voltage of the Keyless Entry Active Antenna Low Reference circuit with a DMM. With the scan tool, go to the Active Antenna output control in the RCDLR special functions menu. While viewing the DMM, attempt to authenticate the Active Antenna. Does the voltage transition to the specified value?	OL	Go to Step 11	Go to Step 10
7	Test the Keyless Entry Active Antenna Supply Voltage circuit for one of the following: Short to ground Short to power Open Refer to Circuit Testing and Wiring Repairs . Did you find and correct the condition?	-	Go to Step 15	Go to Step 11
8	Test the Keyless Entry Active Antenna Data Signal circuit for one of the following: Short to ground Short to power Open Refer to Circuit Testing and Wiring Repairs . Did you find and correct the condition?	-	Go to Step 15	Go to Step 11
9	Test the Keyless Entry Active Antenna Clock Signal circuit for one of the following: Short to ground Short to power Open Refer to Circuit Testing and Wiring Repairs . Did you find and correct the condition?	-	Go to Step 15	Go to Step 12
10	Test the Keyless Entry Active Antenna Low Reference circuit for one of the following: Short to ground Short to power Open Refer to Circuit Testing and Wiring Repairs . Did you find and correct the condition?	-	Go to Step 15	Go to Step 12
11	Inspect for poor connections at the RCDLR. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs . Did you find and correct the condition?	-	Go to Step 15	Go to Step 13
12	Inspect for poor connections at the Keyless Entry Active Antenna. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs . Did you find and correct the condition?	-	Go to Step 15	Go to Step 14
13	Replace the RCDLR. Refer to Control Module References for replacement, setup, and programming. Did you complete the replacement?	-	Go to Step 15	-
14	Replace the Keyless Entry Active Antenna. Refer to Ignition Lock Key Transmitter Antenna Replacement - Rear Compartment replacement. Did you complete the replacement?	-	Go to Step 15	-
15	Use the scan tool in order to clear the DTCs. Operate the vehicle within the conditions for running the DTC, as specified in the supporting text. Does the DTC reset?	-	System OK	Go to Step 2