Question about 2003 Pontiac Bonneville
All new relay's dealing with ignition. Can't check anti-theft, display not working. Radio has been in and out for weeks, but had no problems. Iam lost, please help. Ray
If it were a anti-theft problem the engine would crank over and start for a couple seconds then die ! PCM - engine computer disables fuel injectors , not the starter like ford PATS systems . You need to know how the starter system works before you can repair them . And replacing parts isn't the way to do it . You people on here must have money to burn . Make parts stores rich .The ignition switch is a input to the BCM - body control module or body control system , made up of Three different modules .
The body control system consists of the following 3 modules:
• The dash integration module (DIM)
• The instrument panel integration module (IPM)
• The rear integration module (RIM)
Each of the 3 body control modules integrate a number of functional systems under the control of a single module. Each of the modules are connected to the Class 2 serial data line; many control signals are implemented by Class 2 messages.
The DIM is wired to the class 2 serial data line. The various DIM input and output circuits are described in the corresponding functional areas as indicated on the DIM electrical schematics.
The DIM functions include the following:
• Control of headlights and exterior lamps
• Horn relay control
• Interior lamps incandescent dimming
• Lamps On signal with wiper/washer
• Power moding control over Class 2 serial data line
• Steering wheel controls
• Storage of the clock settings and, sending a message out on the class 2 serial data circuit in response to requests from other modules
Serial Data Power Mode
On vehicles that have several control modules connected by serial data circuits, one module is the power mode master (PMM). On this vehicle the PMM is the DIM. The PMM receives 4 signals from the ignition switch.
To determine the correct power mode the PMM uses the following circuits:
• Accessory voltage
• Ignition 1 voltage
• Ignition 3 voltage
• Off/Run/Crank voltage
Your best bet is to take your vehicle to a qualified repair shop that has the tool and the factory service repair manual .
Posted on Dec 13, 2016
A 6ya expert can help you resolve that issue over the phone in a minute or two.
Best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
The service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.
Posted on Jan 02, 2017
Tips for a great answer:
Apr 25, 2011 | 1998 Pontiac Bonneville
Apr 06, 2011 | 1998 Pontiac Bonneville
Sep 21, 2010 | 2003 Pontiac Grand Am
Mar 17, 2010 | 1996 Chevrolet Blazer
Mar 13, 2010 | 1991 Cadillac DeVille
Jan 23, 2010 | 1984 Ford F 150
Nov 01, 2009 | 1999 Pontiac Bonneville
Jun 06, 2009 | 1993 Nissan Pathfinder
Feb 22, 2009 | 1987 Ford F 150
59 people viewed this question
Usually answered in minutes!