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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. POSSIBLE CAUSES OTHER BUS PROBLEMS PRESENT MIC - NO COMMUNICATION POWERTRAIN CONTROL MODULE INTERMITTENT WIRING AND CONNECTORS TEST ACTION APPLICABILITY 1 NOTE: Low fluid level can be the cause of many transmission problems. If t, read Engine DTC’s. Check and repair all Engine DTC’s prior to performing any transmission symptom diagnostics. t, read Transmission DTC’s. Record all DTC’s and 1 Trip Failures. NOTE: Diagnose 1 Trip Failures as a fully matured DTC. All Continue 2 With the DRBIII t, Check the STARTS SINCE SET counter for P1687. Note: This counter only applies to the last DTC set. All Yes → Go To 3 No → Go To 6 281 TRANSMISSION - NGC |