GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Cadillac 🢒 1999 🢒 Seville 🢒 Body and Accessories 🢒 Theft Deterrent 🢒 DTC B1328 Battery/Source Voltage 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

Battery positive voltage (B+) is supplied to the Theft Deterrent (VTD) Module at connector terminal A, CKT 240 (ORN). The VTD module monitors this voltage to determine if it is within a valid operating range.

Conditions for Setting the DTC

The battery positive voltage (B+) level rises above 15.5 volts for more than approximately 1.2 seconds.

Action Taken When the DTC Sets
    • Stores a DTC B1328 in the VTD module memory.
    • SECURITY indicator is illuminated.
    • The VTD module does not respond to any manual or memory inputs when the voltage is greater than 16 volts.
    • No driver warning message is displayed for this DTC.
    • No other VTD module DTCs set when DTC B1328 is set current.

Conditions for Clearing the DTC
    • The battery positive voltage (B+) level falls below 15.5 volts for approximately 1.2 seconds.
    • A history DTC will clear after 50 consecutive ignition cycles if the condition for the malfunction is no longer present.
    • Use the vehicle On-Boards clearing DTCs feature.
    • Use a scan tool.

Diagnostic Aids

This DTC can set when the vehicle is connected to a battery charger, set to fast charge for a long period of time.

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. Checks that DTC was not set erroneously.

    3.

  3. Determines whether the malfunction is in the charging system or the VTD module.

    4.

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

DTC B1328 -- Source Battery Voltage 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. Turn ON the ignition.
  2. Connect a scan tool.
  3. Select DATA from the VTD module DATA LIST.

Is the voltage within the specified range?

10-15 V

Go to Step 4

Go to Step 3

3

  1. Turn OFF the ignition.
  2. Disconnect the VTD module connector.
  3. Measure the voltage between the connector terminal A, CKT 240 (ORN) and ground.

Is the voltage within the specified range?

10-15 V

Go to Step 4

Go to Charging System Check in Engine Electrical

4

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

Is the replacement complete?

--

Go to Step 5

--

5

  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. Refer to Clearing DTCs .

Are all DTCs cleared?

--

Go to Diagnostic System Check - Theft Deterrent

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