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Makes 🢒 Cadillac 🢒 1998 🢒 Seville 🢒 DTC 🢒 DTC B1327 Battery/Source Voltage Low

DTC B1327 Battery/Source Voltage Low 98


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+) drops below 10 volts for more than approximately 1 second.

Action Taken When the DTC Sets
    • Stores a DTC B1327 in the Navigation Data Processor memory.
    • The Navigation Data Processor will not respond to any manual or memory inputs when the voltage is lower than 10 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+) rises above 10.5 volts for approximately 1 second.
    • Use the On-Boards clearing DTCs feature.
    • Use a scan tool.

Diagnostic Aids

This DTC may set when the Navigation Data Processor connector is loose or corroded.

Test Description

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

  1. Determines if the malfunction is present.

    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 Low Voltage DTCs.

    5.

  5. Replacing the Navigation Data Processor.

    6.

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

Step

Action

Value(s)

Yes

No

1

Was the Navigation System Check performed?

--

Go to Step 2

Go to Diagnostic System Check - Navigation System

2

  1. Turn the Ignition Switch to the ON position.
  2. Connect a scan tool to the Data Link Connector (DLC).
  3. Select DATA from the Navigation Data Processor DATA LIST.

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

10 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 less than the specified value?

10 V

Go to Charging System Check

Go to Step 4

4

Check other modules for Voltage low DTCs.

Do any other modules have Voltage low DTCs?

--

Go to Charging System Check

Go to Step 5

5

Replace the Navigation Data Processor. Refer to Navigation Data Processor Replacement in Instrument Panel, Gauges and Console.

Is the repair complete?

--

Go to Step 6

--

6

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

Are all DTCs cleared?

Go to Diagnostic System Check - Navigation System

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