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.
2001 Jeep Cherokee Limited, RWDFACTORY OEM SERVICE PROCEDURE
No Response From Transmission Control Module
NOTE:
Ensure scan tool communicates with Powertrain Control Module (PCM) before proceeding with this test.
- Turn ignition switch to OFF position. Disconnect Transmission Control Module (TCM) harness connector. See Figure . Measure resistance between ground and terminal No. 24 (Black/Tan wire) at TCM harness connector. See Figure . If resistance is less than 5 ohms, go to next step. If resistance is 5 ohms or greater, repair open in Black/Tan wire. Perform AW4 TRANS VERIFICATION TEST under VERIFICATION TESTS.
- Turn ignition switch to ON position. Measure voltage between ground and terminal No. 26 (Dark Blue/White wire) at TCM harness connector. If voltage is less than 10 volts, repair open in Dark Blue/White wire. Perform AW4 TRANS VERIFICATION TEST under VERIFICATION TESTS. If voltage is 10 volts or greater, go to next step.
- Turn ignition switch to OFF position. Using a jumper wire, ground terminal No. 7 (Violet/Brown wire) at TCM harness connector. Connect scan tool to Data Link Connector (DLC). Turn ignition switch to ON position. Using scan tool, enter SYSTEM MONITORS then CCD BUS TEST. If scan tool displays SHORT TO GROUND, go to next step. If scan tool does not display SHORT TO GROUND, repair open in Violet/Brown wire. Perform AW4 TRANS VERIFICATION TEST under VERIFICATION TESTS.
- Turn ignition switch to OFF position. Using a jumper wire, ground terminal No. 6 (White/Black wire) at TCM harness connector. Using scan tool, enter SYSTEM MONITORS then CCD BUS TEST. If scan tool displays SHORT TO GROUND, replace TCM. See TRANSMISSION CONTROL MODULE under REMOVAL & INSTALLATION. Perform AW4 TRANS VERIFICATION TEST under VERIFICATION TESTS. If scan tool does not display SHORT TO GROUND, repair open in White/Black wire. Perform AW4 TRANS VERIFICATION TEST under VERIFICATION TESTS.
Factory Service Tools
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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.
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