1998 Dodge Caravan computer reset process

SURFCITYSLICK

MEMBER
1998 DODGE CARAVAN

Computer problem
1998 Dodge Caravan 4 cyl Two Wheel Drive Automatic

Once in every long while my caravan computer goes haywire. The speedometer, turn signals and a/c stop working. In the past there is a process of buttons to push to get it all working. Does anyone know what the process is to get it working again. Thanks ed

1 Reply

IMPALASS

MECHANIC
3,112 POSTS

Hello Ed

I believe this is the information you requested.

SELF DIAGNOSTIC TEST
To activate self diagnostic program:

With the ignition switch in the OFF position, depress the TRIP and RESET buttons.
While holding the TRIP and RESET button turn the ignition switch to the ON position.
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: Diagnostic Charts Instrument Cluster Diagnosis
Speedometer See: Diagnostic Charts Speedometer Diagnosis
Tachometer See: Diagnostic Charts Tachometer Diagnosis
Fuel Gauge See: Diagnostic Charts Fuel Gauge Diagnosis
Temperature Gauge See: Diagnostic Charts Temperature Diagnosis
Odometer See: Diagnostic Charts Odometer Diagnosis
Electronic Transmission Range Indicator (PRND3L) See: Diagnostic Charts Electronic Gear Indicator Display Diagnosis
Mechanical Transmission Range Indicator (PRND21) for possible/problems/causes and corrections See: 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)

2 20 mph (40 Km/h)

3 55 mph (80 Km/h)

4 75 mph(120 Km/h)

Tachometer Calibration Point

1 0 rpm

2 1000 rpm

3 3000 rpm

4 6000 rpm

Fuel Gauge Calibration Point

1 Empty(E)

2 1/8 Filled

3 1/4 Filled

4 Full (F)

Temperature Gauge Calibration Point

1 Cold (C)

2 Low Normal

3 High Normal

4 Hot (H)

DIM TEST
When CHEC-0 is displayed in the odometer window, the cluster's vacuum fluorescent (VF) displays will dim down. If the VF display brightness does no change, a problem exists in the cluster.

ODOMETER SEGMENT TEST
When CHEC-2 is displayed in the odometer window, each digit of the odometer will illuminate sequentially If a segment in the odometer does not illuminate normally, a problem exists in the display.

ELECTRONIC TRANSMISSION RANGE INDICATOR SEGMENT TEST
When CHEC-3 is displayed in the odometer window, each segment of the transmission range indicator will illuminate sequentially. If a segment in the transmission range indicator does not illuminate normally, a problem exists in the display board.