LEMON Manuals: Even more car manuals for everyone
Home >> Chrysler >> 2003 >> Intrepid ES, 3.5 V >> Repair and Diagnosis >> External Pages >> Different car >> Section 4 (Automatic Transmission Diagnosis) >> Diagnostic Tests >> DTC P0891: Relay Output Always On >> Diagnostic Procedure

Diagnostic Procedure

WARNING: This page is about a different car, the 2002 Dodge Intrepid, 2002 Chrysler Intrepid, 2002 Chrysler Concorde, and 2002 Chrysler 300M. However, it is still accessible from the selected car via links, so may be relevant.
  1. Using scan tool, check STARTS SINCE SET counter for DTC P0891. If counter is set at zero, go to next step. If counter is not set at zero, go to step  6.
  2. Turn ignition switch to LOCK position. Remove transmission control relay from power distribution center. See Figure. Measure resistance between fused B+ circuit and transmission control relay output circuit at transmission control relay connector. See WIRING DIAGRAMS . If resistance is greater than 5 ohms, go to next step. If resistance is 5 ohms or less, replace transmission control relay.
  3. Disconnect PCM harness connector C4. See Figure. Turn ignition on. Measure voltage between ground and transmission control relay output circuit at transmission control relay connector. See WIRING DIAGRAMS . If voltage is greater than .5 volt, repair circuit for short to voltage. If voltage is .5 volt or less, go to next step.
  4. Measure voltage between ground and transmission control relay control circuit at transmission control relay connector. See WIRING DIAGRAMS . If voltage is greater than .5 volt, repair circuit for short to voltage. If voltage is .5 volt or less, go to next step.
  5. If no other potential causes for DTC P0891 remain, PCM is assumed to be faulty. Repair or replace as necessary. See POWERTRAIN CONTROL MODULE  under REMOVAL & INSTALLATION.
  6. Conditions necessary to set DTC are not present at this time. Using wiring diagram as a guide, inspect wiring and connectors associated with circuits in question. See WIRING DIAGRAMS . Wiggle wires while checking for shorted and open circuits. Repair as necessary. If circuits are okay, testing is complete.
scientia non olet · About LEMON Manuals