No Communication With MIC (Chrysler)
What does P1687 mean?
The P1687 code means the vehicle's onboard diagnostic system has detected: No Communication With MIC (Chrysler). This is a low severity code.
Common Symptoms
- Check Engine Light on
- Instrument cluster gauges not working
- Speedometer or tachometer inoperative
- Warning lights not functioning
- Odometer display blank
Probable Causes (Ranked by Likelihood)
- Failed instrument cluster module Very High
- Broken CAN bus wiring to instrument cluster High
- Corroded instrument cluster connector Moderate
- PCM bus communication circuit failure Low
Step-by-Step Diagnostic Procedure
-
Check if the instrument cluster powers up and performs its self-test during key-on.
-
Inspect the instrument cluster connector behind the dashboard for loose or corroded pins.
-
Use a scan tool to check for CAN bus communication with the instrument cluster (MIC) module.
-
Check CAN bus termination resistors and bus voltage with a multimeter.
-
If the cluster does not communicate, verify power and ground to the cluster before replacing it.
Frequently Asked Questions
What is the MIC?
MIC stands for Mechanical Instrument Cluster. It is the instrument panel module that displays speed, RPM, fuel level, and warning indicators.
Can I still drive without instrument cluster communication?
Yes, but you will have no speedometer, fuel gauge, or warning lights, which is unsafe for extended driving. Have it repaired soon.
Is instrument cluster repair available?
Yes. Many companies offer Chrysler instrument cluster repair for $100-$250, which is often less expensive than a new cluster requiring programming.