Question about 2003 Saturn VUE

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I have a 03 Saturn Vue that has electrical issues sometimes it dose not start and I have to remove the ignition and main battery fuses to get it to start. Up cluster works when wants along with dash lights when key is in on positions everything works when in acc position.

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  • Saturn Master
  • 15,575 Answers

Sounds like you mite need an ignition switch. But just to be sure you should have the modules scanned for codes , especially the body control module ! Are any warning lights staying on ,check ENG , A symbol of a wrench lit up or a picture of a lock symbol ? This car has a few electronic control modules and there all talk back an forth on a serial data bus . This car has two !
Class 2 Data Line
Saturn utilizes the class 2 communications system for most vehicle system controllers that must exchange data and commands. Class 2 data is pulse width modulated. The pulse width modulation of class 2 data allows better utilization of the data line.
The messages carried on class 2 data streams are also prioritized. This means if 2 devices try to communicate on the data line at the same time, only the higher priority message will continue. The device with the lower priority message must wait. The modules on the class 2 data line are:
?€¢
Body Control Module (BCM)


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Power Steering Control Module (PSCM)


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Instrument Panel Cluster (IPC)


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Inflatable Restraint Sensing and Diagnostic Module (SDM)


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Vehicle Communication Interface Module (VCIM), if equipped Controller Area Network (CAN)
The controller area network (CAN) serial data line is a high speed serial data bus used to communicate traction information between the electronic brake control module (EBCM), the engine control module (ECM), the body control module (BCM), and the transaxle control module (TCM). Typical data-transmission speeds must be high enough to ensure that the required real-time response is maintained.
The addressing scheme employed with CAN assigns a label to every message, with each message receiving a unique identifier. The identifier classifies the content of the message, such as engine speed.
Each module processes only those messages whose identifiers are stored in the module's acceptance list. This is CAN's form of message filtering.
The identifier labels both the data content and the priority of the message being sent. Each module can begin transmitting its most important data as soon as the bus is unoccupied. When more than one module starts to transmit simultaneously, the message with the highest priority is assigned first access. A module responds to failure to gain access by automatically switching to receive mode. The module then repeats the transmission attempt as soon as the bus is free again.
You need to have a professional scan tool to check for codes in the modules other than the engine ecm module. I have seen a bad instrument cluster short the bus and cause the vehicle shut down . hope this helps ! First place to start is checking for codes in all the modules. If there is a problem with one of them ,it usually sets a code in one of the other modules !

Posted on Jan 08, 2015

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Posted on Jan 02, 2017

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Never allow Saturn touch a Saturn.
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The loose positive cable results in an electrical surge that wipes out the cps.
The new cps is only avaqilable from Saturn.
When the new cps is delivered, one electrical pen will be bend down and must be straightened prior to insertion of male and female electrical connector to the cps. Otherwise the new cps will fail.
Be certain to tighten the center positive post of three that secure the main fuse box in place. The center post must be tightened to ensure the new cps is not destroyed by subsequent electrical surges which result when Saturn Dealer loosens the center fuse box post.

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2002 saturn vue


Cause of the problem:
During a non-related visit to the Saturn dealer, ie for an oil change, the Saturn dealer loosened the center of three bolts that electrically connect the main battery plus cable to the main fuse box, driver side, under hood, near windshield.
Affect of loose electrical plus cable
A loose cable, probably on the way home from the oil change, causes electrical surges that destroy the CPS and result in catastropic engine failure.
Fix:
Replace the cps. Available only from the Saturn dealer, the new cps exchange will also result in catastrophic failure when replaced.
Problem with CPS Replacement:
The Saturn dealer will bend down one of the electrical conductors on the electrical connector to the new cps. Upon insertion of the electrical connector into the cps recepticle, the bent pen will defeat cps funcetion.
Fix for the Fix
Straighten each electrical pen to the new Saturn supplied cps. Carefully reconnect the connector to the cps making certain each pen is properly inserted.
Be sure to tighten the plus center connector that holds the main fuse box firmly connected to the main plus battery cable.

Saturn will make you pay dearly and ruin your VUE engine because you shame shame shame on you because you did not pay Saturn the big bucks demanded by Saturn to renew the inadequate Saturn maintenance agreement.

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