Caravan V6-201 3.3L (1995)
Body Controller: Component Tests and General Diagnostics
Diagnostic Notes - Read First
TIP: The pinion factor must be set for all new transmission control modules. If the pinion factor is not set or if it is set incorrectly, any speed-related
accessories will not operate or will operate inaccurately.
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This includes the speedometer, speed control, rolling door locks, and other devices that are operated by the powertrain and body controllers.
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For instructions on setting the pinion factor, see the appropriate transmission section.
NOTE: These diagnostics are based on the failure condition or symptom being present at the time of diagnosis.
TIPS:
Verify that the vehicle being tested has a fully charged battery. If it does not, false diagnostic codes or error messages may occur.
Be careful when performing electrical tests to prevent accidental shorting of terminals. Such mistakes can damage fuses or components and
will sometimes set a second code, making diagnosis of the original problem more difficult.
WARNINGS:
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When servicing a vehicle, always wear eye protection, and remove any metal jewelry such as watchbands or bracelets that might
make an inadvertent electrical contact.
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When diagnosing a body system problem, it is important to follow approved procedures where applicable. Following these procedures
is very important to the safety of individuals performing diagnostic tests.
To efficiently diagnose CCD bus problems follow these six steps:
1. Verify Complaint
2. Check for Related Symptoms
3. Analyze Symptoms
4. Isolate the Problem
5. Repair the Isolated Problem
6. Verify Proper Operation
ROAD TESTING
Some complaints will require a test drive to duplicate the diagnostic code or symptom condition and to verify the repair.
CAUTIONS:
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Before road testing a vehicle, be sure that all components are reassembled.
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During the test drive, do not try to read the scan tool screen while in motion.
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Do not hang the scan tool from the rear view mirror or operate it yourself. Have an assistant available to operate the scan tool.
TIP: The pinion factor must be set for all new transmission control modules. If the pinion factor is not set or if it is set incorrectly, any speed-related
accessories will not operate or will operate inaccurately.
-
This includes the speedometer, speed control, rolling door locks, and other devices that are operated by the powertrain and body controllers.
-
For instructions on setting the pinion factor, see the appropriate transmission section.
Description of On-Board Diagnostics
A scan tool is required to read body system trouble codes. However, not all body system problems have a corresponding trouble code.
