Chrysler Concorde 2004 Service Manual page 1311

Symptom:
P1687-NO COMMUNICATION WITH THE MIC
When Monitored and Set Condition:
P1687-NO COMMUNICATION WITH THE MIC
When Monitored: Continuously with engine running.
Set Condition: The DTC sets in approximately 25 seconds if no BUS messages are
received form the MIC.
OTHER BUS PROBLEMS PRESENT
MIC - NO COMMUNICATION
POWERTRAIN CONTROL MODULE
INTERMITTENT WIRING AND CONNECTORS
TEST
1 NOTE: Low fluid level can be the cause of many transmission problems. If
the fluid level is low locate and repair the leak then check and adjust the
fluid level per the Service Information.
NOTE: Always perform diagnostics with a fully charged battery to avoid
false symptoms.
With the DRBIII , read Engine DTC's. Check and repair all Engine DTC's prior to
performing any transmission symptom diagnostics.
With the DRBIII , read Transmission DTC's. Record all DTC's and 1 Trip Failures.
NOTE: Diagnose 1 Trip Failures as a fully matured DTC.
Using the wiring diagram/schematic as a guide, inspect the wiring and connectors.
Repair as necessary.
Perform the Shift Lever Position Test. If the test does not pass, refer to Symptom test
for P0706 Check Shifter Signal.
For Gear Ratio DTC's, check and record all CVI's.
Most DTC's set on start up but some must be set by driving the vehicle such that all
diagnostic monitors have run.
NOTE: Verify flash level of Powertrain Control Module. Some problems are
corrected by software upgrades to the Transmission and Engine software.
NOTE: Check for applicable TSB's related to the problem.
Perform this procedure prior to Symptom diagnosis.
Continue
2 With the DRBIII , Check the STARTS SINCE SET counter for P1687.
Note: This counter only applies to the last DTC set.
Is the STARTS SINCE SET counter set to zero?
Yes → Go To 3
→ Go To 6
No
POSSIBLE CAUSES
ACTION
Go To 2
TRANSMISSION - NGC
151
APPLICABILITY
All
All