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For 1990-2009 cars only
Makes 🢒 Cadillac 🢒 1999 🢒 Seville 🢒 Body and Accessories 🢒 Theft Deterrent 🢒 DTC B2948 Security System Sensor Power CKT High

Refer to Theft Deterrent System Schematics

Cell 133: PASS-Key


Object Number: 361993 Size: FS
Theft Deterrent System Components
Vehicle Theft Deterrent (VTD) Description
Cell 133: CTD Door Switch Inputs
Cell 10: IGN, SW, HTDST LR, HTDST RR, and HTDST RF Fuses
Cell 10: PCM BATT, EXPORT BRK, IP, ABS SOL, and ABS MOT Fuses
Cell 10: START Circuit Breaker and ACC, WSW Fuses
Cell 10: Ignition Switch
Cell 30: Starter Solenoid Controls
Cell 50: Class 2 Serial Data Line (LH Drive)
Cell 14: G201 (1 of 3)
Handling ESD Sensitive Parts Notice
Cell 14: G201 (1 of 3)

Circuit Description

The Theft Deterrent (VTD) Module supplies the reader exciter battery voltage at terminal B, CKT 1836 (YEL). The VTD module monitors this input to determine if it is within a valid operating range.

Conditions for Setting the DTC

The ignition switch is in ON, the VTD module has read the key code and has detected that CKT 1459 (BLK) is shorted to battery for approximately 1 second or more.

Action Taken When the DTC Sets
    • Stores a DTC B2948 in the VTD module memory.
    • No driver warning message will be displayed for this DTC.

Conditions for Clearing the DTC
    • The VTD module detects that CKT 1459 (BLK) is no longer shorted to battery for approximately 1 seconds or more.
    • A history DTC will clear after 50 consecutive ignition cycles if the condition for the malfunction is no longer present.
    • Use the On-Boards clearing DTCs feature.
    • Use a scan tool.

Diagnostic Aids

Check circuit 1459 (BLK) for a short to battery.

Test Description

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

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

    2.

  2. Determines whether the malfunction is in the VTD module.

    3.

  3. Determines whether the malfunction is in the circuit or the reader exciter.

    4.

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

DTC B2948 Security System Sensor Power CKT High

Step

Action

Value(s)

Yes

No

1

Was the Theft Deterrent System Diagnostic System Check performed?

--

Go to Step 2

Go to Diagnostic System Check - Theft Deterrent

2

  1. Ignition switch OFF.
  2. Disconnect the VTD module connector.
  3. Connect a digital multimeter (DMM) between the connector terminal J, CKT 1459 and ground.
  4. Ignition switch ON.

Is the voltage greater than the specified value?

1 volt

Go to Step 3

Go to Step 4

3

  1. Ignition switch OFF.
  2. Disconnect the reader exciter.
  3. Ignition switch ON.

Is the voltage greater than the specified value?

1 volt

Go to Step 5

Go to Step 6

4

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

Is the replacement complete?

--

Go to Step 7

--

5

Repair the short to battery in circuit 1459 (BLK). Refer to Wiring Repairs in Wiring Systems.

Is the repair complete?

--

Go to Step 7

--

6

Replace the reader exciter. Refer to PASS-Key Reader/Exciter Replacement .

Is the replacement complete?

--

Go to Step 7

--

7

  1. Ignition switch OFF.
  2. Reconnect or install any connectors or components that were disconnected or removed.
  3. Ignition switch ON.
  4. Clear any DTCs. Refer to Clearing DTCs .

Are all DTCs cleared?

--

Go to Diagnostic System Check - Theft Deterrent

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