P1490 – Chrysler DTC

Chrysler DTC P1490 – Low Speed Fan CTRL Relay Circuit

DTC P1490 meaning on Chrysler

DTC P1490 on Chrysler indicates a fault in the Low Speed Fan CTRL Relay Circuit. This diagnostic trouble code is triggered when the Powertrain Control Module (PCM) detects an issue with the control circuit for the low-speed radiator fan relay.

Chrysler DTC P1490 symptoms

Symptoms of DTC P1490 on a Chrysler vehicle may include:

• Engine overheating
• Low-speed radiator fan not operating
• Check Engine Light (CEL) illuminated on the dashboard

Chrysler DTC P1490 causes

Common causes of DTC P1490 on Chrysler vehicles include:

• Defective low-speed radiator fan relay
• Faulty wiring or connectors in the relay circuit
• PCM software issue

Chrysler DTC P1490 seriousness

DTC P1490 should be addressed promptly as it can lead to engine overheating and potential damage if the low-speed radiator fan fails to operate correctly. Ignoring this code may result in costly repairs or engine damage.

How to diagnose DTC P1490 on Chrysler

To diagnose DTC P1490 on a Chrysler vehicle, follow these steps:

1. Use a scan tool to retrieve the fault code and freeze frame data.
2. Inspect the low-speed radiator fan relay and its wiring for any visible damage.
3. Check the relay operation using a multimeter to ensure it is functioning correctly.
4. Test the relay control circuit for continuity and proper voltage.

How to fix DTC P1490 on Chrysler

To fix DTC P1490 on a Chrysler vehicle, consider the following steps:

1. Replace the low-speed radiator fan relay if it is found to be faulty.
2. Repair any damaged wiring or connectors in the relay circuit.
3. If the issue persists, reprogram or replace the PCM as needed.

How to erase DTC P1490 on Chrysler

To erase DTC P1490 on a Chrysler vehicle, follow these steps:

1. Use a scan tool to clear the fault code from the PCM memory.
2. Ensure the repair has been completed successfully before clearing the code.
3. Perform a road test to verify that the issue has been resolved.

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