Tachometer Not Operating Properly - Chrysler Concorde 2004 Service Manual

Symptom:

*TACHOMETER NOT OPERATING PROPERLY

ATTEMPT TO COMMUNICATE WITH THE PCM
ENGINE TROUBLE CODES
INSTRUMENT CLUSTER SELF TEST
OBSERVE THE RPM DISPLAY IN THE INSTRUMENT CLUSTER
OBSERVE THE RPM DISPLAY IN THE PCM
POWERTRAIN CONTROL MODULE
TEST
1 Turn the ignition on.
With the DRB, select Body, Body Computer, System Test then PCM Monitor.
Is the PCM active on bus?
Yes → Go To 2
→ Refer to the Communications category for the related symptom(s).
No
2 Turn the ignition off.
During the self test all gauges should move from their lowest calibration point to
their highest calibration point then back down to its lowest.
Calibration points for the Tachometer: 0 RPM, 500 RPM, 2000 RPM, 6000 RPM, 2000
RPM, 500 RPM, 0 RPM.
While holding the trip/reset button down on the instrument cluster, turn the ignition
forward one position (unlock/off position) to start the MIC self test, release the
button.
Did the Tachometer pass the self test?
Yes → Go To 3
→ Replace the Instrument Cluster.
No
3 With the DRB, read ENGINE DTC's.
Are there any engine DTC's present?
Yes → Refer to symptom list for problems related to DRIVABILITY.
→ Go To 4
No
4 Start the engine.
With the DRB, select Engine then Sensors and observe the engine RPM display.
Does the DRB display engine RPM above 400 RPM?
Yes → Go To 5
→ Replace the Powertrain Control Module.
No
POSSIBLE CAUSES
ACTION
Perform BODY VERIFICATION TEST - VER 1.
Perform BODY VERIFICATION TEST - VER 1.
Perform BODY VERIFICATION TEST - VER 1.
Perform BODY VERIFICATION TEST - VER 1.
INSTRUMENT CLUSTER
385
APPLICABILITY
All
All
All
All