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P0700, P1768, and P0750 Fault Codes - Diagnosis and Repair for 2000 Jeep Grand Cherokee

Model: 2000 Jeep Grand Cherokee Fault Code: P0700 Posted: 2017-01-21 13:47

I own a 2000 Jeep Grand Cherokee and am currently experiencing transmission issues. Despite replacing both the input and output speed sensors and the transmission solenoid pack, the problem persists: no first gear engagement and no overdrive functionality. The vehicle continues to display fault codes P0700, P1760, and P0750. I'm seeking clarification on what these codes have in common and would appreciate guidance on my next troubleshooting steps.

Related fault codes
P0700P0750P1768
Comments (3)
Anonymous 2017-01-21 16:10

It's important to rule out a remote starter system first, as this can interfere with transmission control signals. Start by checking the TCM (Transmission Control Module) power supply during KOEO (Key On, Engine Off). Verify that the TCM relay is functioning properly and inspect relevant fuses. Refer to this technical guide for detailed wiring diagrams: http://www.revbase.com/BBBMotor/Wd/DownloadPdf?id=19487

Anonymous 2017-01-21 16:51

I already inspected the relay and wiring harness and discovered several frayed wires with damaged insulation. All damaged sections have been repaired. After completing the repairs, I retested the system but still experience no gear engagement or overdrive. This raises concern that the TCM module may have been damaged during previous electrical issues.

Anonymous 2017-01-21 18:07

Ensure there is no remote start system installed — this can cause communication failures between the TCM and transmission components. To verify proper operation, confirm that the TCM relay is supplying 12V to terminals 15, 16, 17, 36, and 56 of the TCM module as shown in the provided wiring diagram.