Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
1998 Chevrolet Suburban K2500, 7.4 J, Part TimeFACTORY OEM SERVICE PROCEDURE
Section 500 (Theft Deterrent System)
WARNING: This page is about a different car, the 2002 Oldsmobile Aurora and 2001 Oldsmobile Aurora. However, it is still accessible from the selected car via links, so may be relevant.
- Schematic and Routing Diagrams
- Component Locator
- Diagnostic Information and Procedures
- Diagnostic Starting Point - Theft Deterrent
- Diagnostic System Check - Theft Deterrent
- Scan Tool Output Controls
- Scan Tool Data List
- Scan Tool Data Definitions
- DTC B2734: Cannot Write To Non Volatile Memory
- DTC B2947: Supply Voltage To The Theft Deterrent Exciter Module Low
- DTC B2948: Supply Voltage To The Theft Deterrent Exciter Module High
- DTC B2955: Key Data Signal Circuit Voltage High
- DTC B2960: Ignition Key Code Mismatch
- DTC B3031: Learn Coded Key Setting Active
- DTC B3055: Unable To Measure The Ignition Key Transponder Value
- DTC P1626: Loss Of The State Of Health
- DTC P1630: PCM Remains In Theft Deterrent Password Learn Mode
- DTC P1631: PCM Detects An Incorrect Password
- Symptoms - Theft Deterrent
- Content Theft Deterrent (CTD) Alarm Mode Inoperative
- Content Theft Deterrent (CTD) Does Not Disarm with Key Lock
- Horn Inoperative in Content Theft Deterrent (CTD) Alarm Mode
- Lights Inoperative in Content Theft Deterrent (CTD) Alarm Mode
- Security Indicator Inoperative
- Repair Instructions
- Description and Operation
- Theft Systems Description and Operation
- Notes
- Theft System Indicator(s)
- Starting Disabled - 33
- Theft Attempted - 25
- Theft System Fault - 12
- Keyless Entry System (w/AUO)
- Radio with Theftlock
- CTD/VTD Description and Operation
- Content Theft Deterrent (CTD) Description and Operation
- Arming the CTD System
- Locking the Vehicle Without Arming the CTD System
- Disarming an Armed System/Silencing an Alarm
- Personalization
- CTD Circuit Description
- Dash Integration Module (DIM)
- Door Lock Actuators
- Door Modules
- Remote Control Door Lock Receiver (RCDLR)
- Rear Integration Module (RIM)
- Security Indicator
- Inputs
- Outputs
- Vehicle Theft Deterrent (VTD) Description and Operation
- Theft Systems Description and Operation
Factory Service Tools
Use the Manual With the Right Hardware
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.
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