2010 Cadillac CTS Sedan AWD V6-3.6L Page 480
瀚慖f greater than the specified range, test the low reference circuit for an open/high resistance. If the circuit tests normal, replace the VCIM.
3. Ignition ON, test for 9-11 volts between the signal circuit terminal B and ground.
瀚慖f greater than the specified range, test the signal circuit for a short to voltage. If the circuit tests normal, replace the VCIM.
瀚慖f less than the specified range, test the signal circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace
the VCIM.
4. If all circuits test normal, test or replace the cellular microphone.
With RPO UAV
1. Ignition OFF, disconnect the X4 harness connector at the navigation radio and the harness connector at the cellular microphone.
2. Ignition OFF, test for less than 5 ohms between the low reference circuit terminal A and ground.
瀚慖f greater than the specified range, test the low reference circuit for an open/high resistance. If the circuit tests normal, replace the VCIM.
3. Ignition ON, test for 9-11 volts between the signal circuit terminal B and ground.
瀚慖f greater than the specified range, test the signal circuit for a short to voltage. If the circuit tests normal, replace the VCIM.
瀚慖f less than the specified range, test the signal circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace
the VCIM.
4. If all circuits test normal, test or replace the cellular microphone.
5. Connect the X4 harness connector at the navigation radio. Verify DTC B2455 is not set as current in the navigation radio.
瀚慖f DTC B2455 is set as current, replace the navigation radio.
Repair Instructions
Perform the Diagnostic Repair Verification (See: Verification Tests) after completing the diagnostic procedure.
* Mobile Telephone Microphone Replacement (See: Accessories and Optional Equipment/Cellular Phone/Cellular Phone Microphone/Service
and Repair)
* Control Module References (See: Testing and Inspection/Programming and Relearning) for VCIM or navigation radio replacement, setup,
and programming
Communication Interface Module
DTC B2462 (Communication Interface Module)
Diagnostic Instructions
* Perform the Diagnostic System Check - Vehicle (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic System
Check - Vehicle) prior to using this diagnostic procedure.
* Review Strategy Based Diagnosis (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Strategy Based Diagnosis) for an
overview of the diagnostic approach.
* Diagnostic Procedure Instructions (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic Procedure
Instructions) provides an overview of each diagnostic category.
DTC Descriptors
DTC B2462 02
- Global Positioning System (GPS) Antenna Malfunction Short to Ground
DTC B2462 04
- Global Positioning System (GPS) Antenna Malfunction Open Circuit
Circuit/System Description
The telematics communication interface control module receives information from the cellular phone and navigation antenna located on the outside
of the vehicle. The cellular phone and navigation antenna is connected to the telematics communication interface control module via a shielded
coaxial cable. The antenna cable also provides a path for DC current for powering the cellular phone and navigation antenna.
Conditions for Running the DTC
* Ignition is in the RUN or ACC position.
* System voltage is between 9.5 V and 15.5 V.
* The above conditions are present for greater than 1 second.
