Grand Prix V6-3.1L VIN J (2000)
The following items cause most system complaints:
^
Faulty wiring
^
Faulty connectors
^
Faulty components
Understand the computer system and use the tables correctly in order to achieve the following results:
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Reduce diagnostic time
^
Prevent unnecessary parts replacement
DIAGNOSTIC AIDS
The following conditions may result in an intermittent operation of the BCM with no DTC stored:
^
Any condition which results in the interruption of power to the BCM
^
Out of range battery voltage specification. Normal battery voltage is 9-16 volts.
^
A loose or damaged ground(s)
An intermittent failure in the electronic system may be difficult to detect and accurately diagnose. The BCM tests for the different malfunctions under
different vehicle conditions. A test drive may cause a malfunction to repeat. If the system malfunction is not repeated during the test drive, a good
description of the complaint may be useful in locating an intermittent fault condition.
Faulty electrical connections or wiring cause most intermittent problems. If you suspect an intermittent condition, inspect the suspected circuits for the
following conditions:
^
Poor mating of the connector halves or backed out terminals
^
Improperly formed or damaged terminals
^
Wire chafing
^
Poor wire to terminal connections
^
Dirty or corroded terminals
^
Damage to the connector bodies
Use a J 35616-A for diagnostic procedures that require probing or testing a terminal. Use of the J 35616-A ensures the following results:
^
No damage occurs to the terminal.
^
The tool determines if contact tension is sufficient.
DTC P1626 will set in the Powertrain Control Module (PCM) if the following conditions exist:
^
The ignition is in the RUN position.
^
The BCM is disconnected.
When the BCM diagnostics and repairs are completed, refer to Engine Controls - 3.1 L (LG8) or Engine Controls - 3.8L for additional information
on the PCM related DTCs.
TEST DESCRIPTION
The number(s) below refer to the step number(s) on the diagnostic table.
1. This step checks if the BCM identifies the BCM type.
2. This step checks if vehicle has the correct BCM type installed.
3. This step checks for DTCs stored in BCM memory.
4. This step checks for an open in CKT 1550.
5. This step checks for an open in CKT 443.
6. This step checks for a short to B+ in CKT 443.
A Diagnostic System Check - Body Control System
