Jeep Cars & Trucks - Answered Questions & Fixed Issues
1987 Jeep dies when temperature hits 180. Then it will start up after its sits for 30 minutes.
First you will need to determine if there is a problem with the electrical system or fuel system. Connect a fuel pressure gauge to the fuel rail to see if you have pressure when the vehicle dies. It it maintains pressure and the vehicle dies, then check to see if there is a spark issue. Fuel issue could be bad/weak fuel pump, bad relay or restriction in fuel delivery system. No spark could be ignition coil, bad computer, bad electrical connection or relay. To check these systems you need special meters and scanners. Best to take to a repair center.
2/24/2024 10:45:47 PM •
Jeep Cars &...
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Answered
on Feb 24, 2024
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19 views
My 02 jeep liberty dash not working. No tack,speedometer, fuel or engine temperature. Any help please
- Faulty Instrument Cluster: The instrument cluster itself may be defective or damaged. Over time, electronic components can degrade, leading to malfunctions.
- Fuse: Check the fuse box for any blown fuses related to the instrument cluster. A blown fuse could disrupt power to the cluster, causing all the gauges to fail simultaneously.
- Faulty Wiring: There could be a problem with the wiring harness or connectors that supply power and data to the instrument cluster. Loose connections or damaged wires can prevent the cluster from receiving the necessary signals.
- Vehicle Speed Sensor: The vehicle speed sensor (VSS) is responsible for providing speed data to the instrument cluster. If the VSS malfunctions, it can cause the speedometer to stop working, and it may affect other gauges as well.
- Engine Control Module (ECM): The ECM communicates with the instrument cluster to provide data for various gauges. A malfunctioning ECM could disrupt communication and cause all the gauges to fail.
- Grounding Issues: Poor grounding can lead to electrical problems, including instrument cluster malfunctions. Ensure that all ground connections related to the instrument cluster are clean and secure.
Given the complexity of diagnosing electrical issues, it's advisable to have a qualified mechanic or automotive technician inspect your vehicle. They can use diagnostic tools to pinpoint the exact cause of the problem and recommend the necessary repairs. Additionally, if the issue is related to the instrument cluster itself, it may need to be repaired or replaced by a professional.
2/21/2024 3:31:07 PM •
Jeep Cars &...
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Answered
on Feb 21, 2024
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31 views
U0125-00 and other codes present with traction control, acc, and 4wd
Have you checked the connectors in the wiring harnesses for the ABS unit and associated components for water intrusion or corrosion?
The codes that you've posted (details below) all point to a poor electrical connection in the circuit(s) or an open or short in the circuit(s). That could be either due to corrosion, liquid intrusion, a wiring harness rubbing against something hot or something that vibrates and has damaged the wiring.
If the wiring and connections are all intact and there are no opens, shorts to power or shorts to ground, the next think to look at would be the modules and/or sensors to make sure they're operating within spec.
U1003 Possible Causes:
*Faulty Anti-lock Brake System (ABS)
*Module Anti-lock Brake System (ABS)
*Module harness is open or shorted Anti-lock Brake System (ABS)
*Module circuit poor electrical connection
The Diagnostic Trouble Code (DTC) sets if the Anti-lock Brake System (ABS) Module fails to receive bus messages from the Dynamic Sensor for approximately 150 ms.
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C0020-1c Possible Causes:
*Faulty Anti-Lock Brake System (ABS) *Control Module Faulty Hydraulic Control Unit (HCU)
*Hydraulic Control Unit (HCU) harness is open or shorted Hydraulic Control Unit
*(HCU) circuit poor electrical connection
The Hydraulic Control Unit (HCU) consists of a valve body, pump motor, and inlet/outlets for the brake lines. The combined HCU and Antilock Brake System (ABS) module is located forward of the master cylinder.
The Anti-Lock Brake System (ABS) Module monitors the ABS Pump Motor. The ABS Module sets the OBDII code when the ABS Pump Motor is not to factory specifications.
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U0125 Possible Causes:
*Faulty Dynamics Sensor Dynamics Sensor
*Harness is open or shorted Dynamics
*Sensor circuit poor electrical connection
The Diagnostic Trouble Code (DTC) sets if the Anti-Lock Brakes System (ABS) Module fails to receive bus messages from the Dynamics Sensor.
2/8/2024 9:43:13 PM •
Jeep Cars &...
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Answered
on Feb 08, 2024
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66 views
Jumps on rapid acceleration..
Could be fuel related. First thing to check for that would be a fuel pressure test. Even though the pump is working, the proper and specified pressure must be kept in the fuel rail for the injectors to work right.And/or have the computer scanned for any diagnostic trouble codes. Many national parts stores do free diagnostic scans.
1/25/2024 10:41:30 AM •
2002 Jeep...
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Answered
on Jan 25, 2024
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408 views
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