Jeep DTC P1490 – Low Speed Fan CTRL Relay Circuit
DTC P1490 meaning on Jeep
DTC P1490 on a Jeep indicates a problem with the Low Speed Fan CTRL Relay Circuit. This code is set when the Powertrain Control Module (PCM) detects an issue with the control circuit for the low-speed cooling fan relay.
Jeep DTC P1490 symptoms
Symptoms of DTC P1490 on a Jeep may include:
- Engine overheating
- Malfunction indicator light (MIL) illuminated on the dashboard
- Low-speed cooling fan not operating properly
Jeep DTC P1490 causes
Common causes of DTC P1490 on a Jeep include:
- Defective low-speed cooling fan relay
- Faulty wiring or connectors in the relay circuit
- PCM issues
Jeep DTC P1490 seriousness
DTC P1490 should be addressed promptly as it can lead to engine overheating and potential damage if the cooling fan system is not functioning correctly.
How to diagnose DTC P1490 on Jeep
To diagnose DTC P1490 on a Jeep, you can:
- Check the low-speed cooling fan relay for proper operation
- Inspect the wiring and connectors in the relay circuit for any damage or corrosion
- Use a scan tool to retrieve freeze frame data and further diagnostic trouble codes (DTCs)
How to fix DTC P1490 on Jeep
To fix DTC P1490 on a Jeep, you can:
- Replace the low-speed cooling fan relay if it is found to be defective
- Repair any damaged or corroded wiring or connectors in the relay circuit
- If necessary, diagnose and address any PCM issues
How to erase DTC P1490 on Jeep
To erase DTC P1490 on a Jeep, you can:
- Use a scan tool to clear the diagnostic trouble codes stored in the PCM
- After making the necessary repairs, clear the codes and perform a test drive to ensure the issue is resolved
Recommended tools for Jeep diagnostics
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