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TEST ACTION APPLICABILITY 3 With the DRBIII t, check all of the other modules on the vehicle for evidence of a vehicle bus problem. 9No Bus9 or is there any evidence of an overall vehicle bus problem? All Yes → Refer to the Communications category and perform the appropri- ate symptom. No → Go To 4 4 Ignition on, engine not running. t, clear all DTC’s. Start the engine in park. t, read the BCM DTC’s. Does the Body Control Module have a 9MIC MESSAGES NOT RECEIVED9 DTC? All Yes → Refer to the Communications category and perform test for 9MIC MESSAGES NOT RECEIVED 9. Perform 40/41TE (NGC) TRANSMISSION VERIFICATION No → Go To 5 5 Ignition on, engine not running. t, erase Transmission DTC’s. Start the engine in park. t, read Transmission DTC’s. Is the DTC 9P1687 NO COMMUNICATION WITH THE MIC9 present? All Yes → Replace the Powertrain Control Module. WITH THE DRBIIIt PERFORM QUICK LEARN AND REPROGRAM PINION FAC- No → Test Complete. 6 The conditions necessary to set the DTC are not present at this time. t, check the EATX EVENT DATA to help identify the conditions in which the DTC was set. All Yes → Repair as necessary. Perform 40/41TE (NGC) TRANSMISSION VERIFICATION No → Test Complete. 140 TRANSMISSION - NGC P1687-NO COMMUNICATION WITH THE MIC — Continued |