GM Service Manual Online
For 1990-2009 cars only

Refer to

Cell 133: PASS-Key® III


Object Number: 332341  Size: FS
Theft Deterrent System Components
Vehicle Theft Deterrent (VTD) Description
Cell 133: Content Theft Deterrent
Cell 10: Horn and PCM Fuses
Cell 10: IGN, RUN/CRK, RUN, SBM, and PDM/CRU Fuses
Cell 10: IGN, RUN/CRK, RUN, SBM, and PDM/CRU Fuses
Cell 10: IGN, RUN/CRK, RUN, SBM, and PDM/CRU Fuses
Handling ESD Sensitive Parts Notice
Handling ESD Sensitive Parts Notice
Cell 50: Class 2 Serial Data Line
Cell 14: G202 (CKT 351 1 of 2)
Cell 14: G202 (CKT 351 2 of 2)

Circuit Description

The theft deterrent (VTD) module performs an internal test to determine if a key is present every 300 milliseconds. If the test determines that a key is not present the VTD module will indicate a no key present condition.

Conditions for Setting the DTC

At the beginning of the ignition cycle the VTD module detects a invalid coded key.

Action Taken When the DTC Sets

    • Stores a DTC B2723 in the VTD module memory.
    • Security indicator is illuminated.

Conditions for Clearing the DTC

    • The VTD module detects a key.
    • The history DTC will clear after 50 ignition cycles.
    • Use a scan tool in order to clear a history DTC.

Diagnostic Aids

Check all vehicle ignition keys and inspect the key(s) for damage.

Test Description

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

  1. Perform the Theft Deterrent Diagnostic System Check before continuing with the diagnosis of this DTC.

  2. Clear all DTCs and cycle ignition to check that the DTC did not falsely set.

  3. Clear all DTCs after the repair procedure is complete.

DTC B2723 Key Not Present

Step

Action

Value(s)

Yes

No

1

Was the Theft Deterrent Diagnostic System Check performed?

--

Go to Step 2

Go to Diagnostic System Check - Theft Deterrent

2

  1. Check all the vehicle's ignition keys, until vehicle starts.
  2. Clear all DTCs.
  3. Turn OFF the ignition.
  4. Turn ON the ignition.

Is the DTC still present?

--

Go to Step 3

Go to Diagnostic System Check - Theft Deterrent

3

Replace the VTD Module. Refer to Theft Deterrent Module Replacement .

Refer to Programming Theft Deterrent System Components .

Is the replacement complete?

--

Go to Step 4

--

4

  1. Turn OFF the ignition.
  2. Reconnect or install any connectors or components that were disconnected or removed.
  3. Turn ON the ignition.
  4. Clear any DTCs.

Are all DTCs cleared?

--

Go to Diagnostic System Check - Theft Deterrent

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