2010 Cadillac Truck SRX AWD V6-2.8L Turbo Page 554
The telematics communication interface control module detects a valid signal on the keypad signal circuit for longer than 15 seconds. If one of the
OnStar(R) buttons is held or stuck for 15 seconds or greater, the telematics communication interface control module will set this DTC.
Action Taken When the DTC Sets
* The OnStar(R) status LED turns red.
* No calls can be placed.
* The telematics communication interface control module will ignore all inputs from the OnStar(R) button assembly.
Conditions for Clearing the DTC
* The condition responsible for setting the DTC no longer exists.
* A history DTC will clear once 50 consecutive malfunction-free ignition cycles have occurred.
Reference Information
Schematic Reference
OnStar Schematics (See: Accessories and Optional Equipment/Diagrams/Electrical Diagrams/OnStar Schematics)
Connector End View Reference
Component Connector End Views (See: Diagrams/Connector Views/Connector End Views By Name)
Description and Operation
OnStar Description and Operation (See: Accessories and Optional Equipment/Description and Operation/OnStar)
Electrical Information Reference
* Circuit Testing (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic Procedures/Circuit
Testing/Circuit Testing)
* Connector Repairs (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic
Procedures/Connector Repairs/Connector Repairs)
* Testing for Intermittent Conditions and Poor Connections (See: Testing and Inspection/Component Tests and General Diagnostics/General
Electrical Diagnostic Procedures/Circuit Testing/Testing for Intermittent Conditions and Poor Connections)
* Wiring Repairs (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic Procedures/Wiring
Repairs/Wiring Repairs)
Scan Tool Reference
Control Module References (See: Testing and Inspection/Programming and Relearning) for scan tool information
Circuit/System Testing
1. Ignition OFF, disconnect the harness connector at the A10 inside rearview mirror.
2. Test for less than 15 Ohms between the mirror ground circuit terminal 5 and ground.
瀚慖f greater than the specified range, test the ground circuit for an open/high resistance.
3. Ignition ON, test for less than 1 V between the keypad signal circuit terminal 3 and ground.
瀚慖f greater than the specified range, test the keypad signal circuit for a short to voltage. If the circuit tests normal, replace the K73
telematics communication interface control module.
4. Ignition OFF, test for 600k-850k Ohms between the keypad signal circuit terminal 3 and ground.
瀚慖f less than the specified range, test the keypad signal circuit for a short to ground. If the circuit tests normal, replace the K73 telematics
communication interface control module.
瀚慖f greater than the specified range, test the keypad signal circuit for an open/high resistance. If the circuit tests normal, replace the K73
telematics communication interface control module.
5. Ignition ON, test for 9.5-10.5 V between the keypad supply voltage circuit terminal 4 and ground.
瀚慖f less than the specified range, test the supply voltage circuit for a short to ground or open/high resistance. If the circuit tests normal,
replace the K73 telematics communication interface control module.
瀚慖f greater than the specified range, test the supply voltage circuit for a short to voltage. If the circuit tests normal, replace the K73
telematics communication interface control module.
6. If all circuits test normal, test or replace the button assembly.
