DTC P1388-A: AUTO SHUTDOWN RELAY CONTROL CIRCUIT Chrysler LHS II

Note. For connector terminal ID, see CONNECTOR IDENTIFICATION . For wiring diagram, see WIRING DIAGRAMS article.

Scheme 58

Scheme 59

1. Using scan tool, actuate Auto Shutdown (ASD) relay. Listen for clicking sound at ASD relay. ASD relay is located in Power Distribution Center (PDC) in engine compartment. If ASD relay is clicking, go to next step. If ASD relay is not clicking, go to step 5.
2. Condition to set trouble code is not present at this time. AUTO SHUTDOWN RELAY CONTROL CIRCUIT DTC sets if an open or shorted condition is detected in ASD relay control circuit. Possible causes are: ASD relay coil open or shorted, fused ignition switch circuit open, ASD relay control circuit open or shorted, inoperative driver in Powertrain Control Module (PCM), PCM failure, faulty connections or wiring. Go to next step.
3. Inspect all related wiring and connectors and repair as necessary. If no problems were found with wiring and connectors, go to next step. If related wiring and connectors were repaired, perform «TEST VER-2A: ROAD TEST VERIFICATION»(ref-576-S22124556262000030800000).
4. Start engine. Wiggle wiring harness from ASD relay to PCM. If engine stalled, repair wiring harness as necessary. Perform «TEST VER-2A: ROAD TEST VERIFICATION»(ref-576-S22124556262000030800000). If engine did not stall, see «INACTIVE TROUBLE CODE CONDITION»(ref-576-S27765318282000030800000) under SELF-DIAGNOSTICS. Test is complete. Perform «TEST VER-2A: ROAD TEST VERIFICATION»(ref-576-S22124556262000030800000).
5. Disconnect ASD relay. Using a voltmeter, check voltage of both ASD relay connector fused B+ circuits. See «ASD RELAY CONNECTOR WIRE IDENTIFICATION»(ref-576-S09573996832000030800000) table. (Scheme 58) When checking fused B+ circuit, ensure circuit is tested at both terminals (one at a time) of ASD relay connector. ASD relay is located in underhood Power Distribution Center (PDC). See «ASD RELAY CONNECTOR WIRE IDENTIFICATION»(ref-576-S09573996832000030800000) table. If voltage is more than 10 volts, go to next step. If voltage is 10 volts or less, repair open fused B+ circuit. Perform «TEST VER-2A: ROAD TEST VERIFICATION»(ref-576-S22124556262000030800000).
6. Using an ohmmeter, check resistance between ASD relay terminals No. 85 and 86. (Scheme 59) If resistance is less than 100 ohms, go to next step. If resistance is 100 ohms or more, replace ASD relay. Perform «TEST VER-2A: ROAD TEST VERIFICATION»(ref-576-S22124556262000030800000).
7. Turn ignition off. Disconnect Powertrain Control Module (PCM) connector. Using an ohmmeter, check resistance of ASD relay control circuit at ASD relay connector. See «ASD RELAY CONNECTOR WIRE IDENTIFICATION»(ref-576-S09573996832000030800000) table for wire identification. If resistance is 5 ohms or more, go to next step. If resistance is less than 5 ohms, repair short to ground in ASD relay control circuit. Perform «TEST VER-2A: ROAD TEST VERIFICATION»(ref-576-S22124556262000030800000).
8. Using an ohmmeter, measure resistance of ASD relay control circuit between ASD relay connector and PCM connector. See «ASD RELAY CONNECTOR WIRE IDENTIFICATION»(ref-576-S09573996832000030800000) table and «PCM CONNECTOR WIRE IDENTIFICATION»(ref-576-S19870922702000030800000) table for wire identification. If resistance is less than 5 ohms, replace PCM. Perform «TEST VER-2A: ROAD TEST VERIFICATION»(ref-576-S22124556262000030800000). If resistance is 5 ohms or more, repair open ASD relay control circuit. Perform «TEST VER-2A: ROAD TEST VERIFICATION»(ref-576-S22124556262000030800000).

ASD RELAY CONNECTOR WIRE IDENTIFICATION

PCM CONNECTOR WIRE IDENTIFICATION