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CID 2189 CAT Fault Code

Left All Wheel Drive (AWD) Clutch Reverse Solenoid

Cause :

When the ignition switch is turned to ON, voltage from the ECM's MREL terminal is applied to the EFI MAIN relay. This causes the contacts of the EFI MAIN relay to close, which supplies power to terminal +B of the TCM.It starts at the battery, includes ignition switch, fuses, starter solenoid, starter relay, and multiple safety devices, such as clutch position sensor and the neutral safety switches.


Don't forget ! When a fault code pops up, CAT's Uptime Center is automatically notified via an cellular link, and it alerts the truck's owner by prearranged methods, usually email or phone calls.

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