On scanner : c2204 dynamic sensor interior - 2005 Jeep Grand Cherokee

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.

https://my.gm.com/content/dam/gmownercenter/gmna/dynamic/manuals/1995/chevrolet/astro_passenger/1995_chevrolet_astro_owners.pdf

Normally when the interior lights in blink, because the boot or one of the doors is not closed propuly or a door or boot sensor is faulty mite be sticking

OBD2 code scanner

disconnecting the battery wouldnt have made no difference ,try putting the old sensor back on and clear the codes and see what happens ,as sometimes the code comes up for no reason other than a hot car interior ,also check the part numbers on the sensors as it could be a different voltage output but dont go their as to how this can happen

Hi there:


DTC C2204 - Dynamics Sensor Internal

This light is on most likely due to a speed sensor failure. Either the rear one in the rear diff housing or the right or left front speed sensor. You will need someone with a full level scan tool to scan the ABS module to find which sensor it is and then replace that sensor accordingly.

The location of the Dynamic internal sensor: It is located in lower part of the centre console . exactly on the right side of the air bag module.




REMOVAL


1. Disconnect and isolate the battery negative cable from its battery post.
2. Remove the instrument panel center stack console.






3. Roll back the front floor carpet from under the instrument panel toward the rear of the vehicle for access to components.
4. Remove the fasteners (2), then instrument panel center support brackets (2). There is one bracket on each side of tunnel structure.



5. Disengage the right intermediate floor distribution duct (2) from the stud located on the floor support (3) and move it aside as necessary to access the dynamics sensor.

1. Disconnect the wiring harness connector (3) at the dynamics sensor (2).
2. Remove the screws (1) mounting the dynamics sensor to the mounting bracket on the floor pan tunnel (4).
3. Remove the dynamics sensor (2).

Hope this helps.

Hi there:


DTC C2204 - Dynamics Sensor Internal

This light is on most likely due to a speed sensor failure. Either the rear one in the rear diff housing or the right or left front speed sensor. You will need someone with a full level scan tool to scan the ABS module to find which sensor it is and then replace that sensor accordingly.

The location of the Dynamic internal sensor: It is located in lower part of the centre console . exactly on the right side of the air bag module.




REMOVAL


1. Disconnect and isolate the battery negative cable from its battery post.
2. Remove the instrument panel center stack console.






3. Roll back the front floor carpet from under the instrument panel toward the rear of the vehicle for access to components.
4. Remove the fasteners (2), then instrument panel center support brackets (2). There is one bracket on each side of tunnel structure.



5. Disengage the right intermediate floor distribution duct (2) from the stud located on the floor support (3) and move it aside as necessary to access the dynamics sensor.

1. Disconnect the wiring harness connector (3) at the dynamics sensor (2).
2. Remove the screws (1) mounting the dynamics sensor to the mounting bracket on the floor pan tunnel (4).
3. Remove the dynamics sensor (2).

Hope this helps.

REMOVAL

1. Disconnect and isolate the battery negative cable from its battery post.
2. Remove the instrument panel center stack console. See: Body and Frame\Interior Moulding / Trim\Dashboard / Instrument Panel\Service and Repair\Instrument Panel Bin - Removal

1. Roll back the front floor carpet from under the instrument panel toward the rear of the vehicle for access to components. See: Body and Frame\Interior Moulding / Trim\Carpet\Service and Repair\Carpet - Removal
2. Remove the fasteners (2), then instrument panel center support brackets (2). There is one bracket on each side of tunnel structure.

5. Disengage the right intermediate floor distribution duct (2) from the stud located on the floor support (3) and move it aside as necessary to access the dynamics sensor.

1. Disconnect the wiring harness connector (3) at the dynamics sensor (2).
2. Remove the screws (1) mounting the dynamics sensor to the mounting bracket on the floor pan tunnel (4).
3. Remove the dynamics sensor (2).

Hope this helps....

I had the same problem. Cheap way to fix is to remove fuse. Only problem with that is my power windows were on the same fuse so they wouldn't work without the fuse. Alternative was to remove the bulbs from interior lights and leave the fuse in. The door ajar light will remain on but at least your interior lights won't be on running down your battery.

These lights indicate you have an ABS fault as the DSC needs to see a signal from the wheel speed sensors, One of the wheel speed sensors will have failed, find someone with a scanner to determine which one, then replace faulty sensor and reset light