Grand Caravan FWD V6-229 3.8L VIN L MFI (1997)
Body Control Module: Component Tests and General Diagnostics
Diagnostic Notes - Read First
Vehicle Preparation for Testing
Make sure the vehicle being tested has a fully charged battery. If it does not, false diagnostic codes or error messages may occur.
Servicing Sub-Assemblies
Some components of the body system are intended to be serviced in assembly only. Attempting to remove or repair certain system sub-components
may result in personal injury and/or improper system operation. Only those components with approved repair and installation procedures should
be serviced.
Description of On-Board Diagnostics
Each diagnostic trouble code is diagnosed by following a specific testing procedure. The diagnostic test procedures contain step-by-step instructions for
determining the cause of trouble codes. It is not necessary to perform all of the tests to diagnose an individual code.
The body control module will set a diagnostic trouble code if a monitored input is determined to be malfunctioning and the trouble condition remains
active for 10 consecutive seconds. Once the trouble condition is removed, the body control module will back out the diagnostic trouble code if the
trouble condition remains cleared for twenty ignition cycles.
Always begin by reading the diagnostic trouble codes using a scan tool. This procedure begins with the Symptom Identification TEST-1A - Identifying
Vehicle Equipment and System Problems. This will direct you to the specific test(s) that must be performed.
Cluster Diagnostics/Calibration
SELF DIAGNOSTIC TEST
To activate self diagnostic program:
1. With the ignition switch in the OFF position, depress the TRIP and RESET buttons.
2. While holding the TRIP and RESET button turn the ignition switch to the ON position.
3. Continue to hold the TRIP and RESET buttons until the word code appears in the odometer windows (about five seconds) then release the
buttons. If a problem exists, the system will display diagnostic trouble codes. If no problem exists the code 999 (End Test) will momentarily
appear.
INSTRUMENT CLUSTER DTC CHART
DTC ......................................................................................................................................................................................................... Description
110 ......................................................................................................................................................................................... Memory Fault in cluster
111 ...................................................................................................................................................................................... Calibration fault in cluster
905 ......................................................................................................................................................................... No CCD bus messages from TCM
921 ..................................................................................................................................................................................... Odometer fault from BCM
940 ......................................................................................................................................................................... No CCD bus messages from PCM
999 .......................................................................................................................................................................................................... End of Codes
NOTE: For DTC testing see Condition Diagnostic Charts below.
CONDITIONS
Refer to the following Diagnostic Charts:
-
Instrument Cluster See: Instrument Panel, Gauges and Warning Indicators/Testing and Inspection/Diagnostic Charts/Instrument Cluster Diagnosis
-
Speedometer See: Instrument Panel, Gauges and Warning Indicators/Testing and Inspection/Diagnostic Charts/Speedometer Diagnosis
-
Tachometer See: Instrument Panel, Gauges and Warning Indicators/Testing and Inspection/Diagnostic Charts/Tachometer Diagnosis
-
Fuel Gauge See: Instrument Panel, Gauges and Warning Indicators/Testing and Inspection/Diagnostic Charts/Fuel Gauge Diagnosis
-
Temperature Gauge See: Instrument Panel, Gauges and Warning Indicators/Testing and Inspection/Diagnostic Charts/Temperature Diagnosis
-
Odometer See: Instrument Panel, Gauges and Warning Indicators/Testing and Inspection/Diagnostic Charts/Odometer Diagnosis
-
Electronic Transmission Range Indicator (PRND3L) See: Instrument Panel, Gauges and Warning Indicators/Testing and Inspection/Diagnostic
Charts/Electronic Gear Indicator Display Diagnosis
-
Mechanical Transmission Range Indicator (PRND21) for possible/problems/causes and corrections See: Instrument Panel, Gauges and Warning
Indicators/Testing and Inspection/Diagnostic Charts/Mechanical Transmission Range Indicator (PRND21)
CALIBRATION TEST
When CHEC-1 is displayed in the odometer window, each of the cluster's gauge pointers will move sequentially through each calibration point. The
Calibration Table contains the proper calibration points for each gauge. If the gauge pointers are not calibrated, a problem exists in the cluster. If any
gauge is out of calibration it will have to be calibrated using a scan tool (DRB III).
CLUSTER CALIBRATION TABLE
Speedometer ........................................................................................................................................................................................ Calibration Point
1 .......................................................................................................................................................................................................... 0 mph (0 Km/h)