GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Cadillac 🢒 1998 🢒 Seville 🢒 DTC 🢒 DTC B1328 Battery/Source Voltage High

DTC B1328 Battery/Source Voltage High 8


Object Number: 262605 Size: MF

Circuit Description

Battery Positive Voltage (B+) is supplied to the Navigation Data Processor at the connector C1, terminal 5, CKT 3240 (ORN). The Navigation Data Processor 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 1second.

Actions Taken When the DTC Sets
    • Stores a DTC B1328 in the Navigation Data Processor memory.
    • The MSM will not respond to any manual or memory inputs when the voltage is greater than 16 volts
    • No driver warning message will be displayed for this DTC.
    • The Navigation Data Processor switch failure and position sensor failure DTCs will not set while DTC B1982 is current.

Conditions for Clearing the DTC
    • The Battery Positive Voltage (B+) level falls below 15 volts for approximately 1 second.
    • Use the On-Boards clearing DTCs feature.
    • Use a scan tool.

Diagnostic Aids

This DTC may set when the vehicle is placed on a battery charger, on 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 Navigation Diagnostic System Check before continuing with the diagnosis of this DTC.

    2.

  2. Checks that a false DTC was not set.

    3.

  3. Determines whether the malfunction is in the charging system or the Navigation Data Processor.

    4.

  4. Checking to see if other modules have High Voltage DTCs.

    5.

  5. Replacing the Navigation Data Processor.

    6.

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

DTC B1328 MSM -- Source/Battery Voltage High

Step

Action

Value(s)

Yes

No

1

Was the Navigation System Check performed?

--

Go to Step 2

Go to Navigation Diagnostic System Check

2

  1. Turn ON the ignition switch.
  2. Start Engine.
  3. Connect a scan tool to the Data Link Connector (DLC).
  4. Select DATA from the Navigation Data Processor DATA LIST.

Is the Battery Positive Voltage (B+) less than the specified value?

15.5 V

Go to Step 4

Go to Step 3

3

  1. Turn OFF the ignition switch.
  2. Disconnect the Navigation Data Processor connector C1.
  3. Start Engine.
  4. Measure the voltage between the Navigation Data Processor connector C1 terminal 5, CKT 3240 (ORN) and ground.

Is the measured voltage greater than the specified value?

15.5 V

Refer to Charging System in Engine Electrical

Go to Step 4

4

Check other modules for Voltage High DTCs.

Do any other modules have Voltage High DTCs?

--

Refer to Charging System in Engine Electrical

Go to Step 5

5

Replace the Navigation Data Processor.

Is the repair complete?

--

Go to Step 6

--

6

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

Are all DTCs cleared?

Go to Navigation Data Processor Diagnostic System Check

--