Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSCHRYSLER2004PT CRUISER TOURING, 2.4 B, AUTOMATICREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 19 (ENGINE CONTROLS - SELF-DIAGNOSTICS)DIAGNOSTIC TESTSDTC P0685: ASD RELAY CONTROL CIRCUITTESTING
2004 Chrysler PT Cruiser Touring, 2.4 B, Automatic
DTC P0685: ASD Relay Control Circuit: Testing
2004 Chrysler PT Cruiser Touring, 2.4 B, AutomaticSECTION Testing
WARNING: This page is about a different car, the 2004 Chrysler Intrepid, 2003 Dodge Intrepid, 2003 Chrysler Intrepid, 2003 Chrysler Concorde, and 2003 Chrysler 300M. However, it is still accessible from the selected car via links, so may be relevant.
- Ignition on, engine not running. With the DRBIII® scan tool, actuate the ASD Relay. Is the ASD relay operating? If yes, see INTERMITTENT CONDITION under SELF-DIAGNOSTIC SYSTEM. If no, go to next step.
- Turn the ignition off. Remove the ASD relay from the PDC. Ignition on, engine not running. Measure the voltage of the (A14) fused B+ circuits in the PDC. Is the voltage above 11.0 volts? If yes, go to next step. If no, repair the (A14) fused B+ circuit. Check and replace any open fuses.
- Turn the ignition off. Remove the ASD relay from the PDC. Measure the resistance of the ASD relay between the fused B+ terminal and the ASD relay control terminal. Is the resistance between 60-85 ohms? If yes, go to next step. If no, replace the ASD relay.
- Turn the ignition off. Remove the ASD relay from the PDC. Disconnect the PCM harness connectors. Measure the resistance of the (K51) ASD control circuit from the PDC to the appropriate terminal of Miller Special Tool (8815). Is the resistance below 5.0 ohms? If yes, go to next step. If no, repair the open in the (K51) ASD relay control circuit.
- Turn the ignition off. Remove the ASD relay from the PDC. Measure the resistance between ground and the (K51) ASD relay control circuit in the PDC. Is the resistance below 5.0 ohms? If yes, repair the short to ground in the (K51) ASD relay control circuit. If no, go to next step.
- Before continuing disconnect the PCM harness connector and check the related wiring terminals for corrosion, damage or terminal push out. Repair as necessary. Pay particular attention to all power and ground circuits. If there are no possible causes remaining, replace and program the PCM. See PROGRAMMING .
CAUTION:
Do not probe the PCM harness connectors. Probing the PCM harness connectors will damage the PCM terminals resulting in poor terminal to pin connection. Install Miller Special Tool (8815) to perform diagnosis.
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.