Cherokee Diagnostic Trouble Code - Troubleshooting & Tips

Cherokee Diagnostic Trouble Code 11
DTC 11 on the 4.0L Inline 6 MPI "Power Tech HO" (High Output) engine indicates a fault with the CPS (Crankshaft Position Sensor). The Haynes manual (http://en.wikipedia.org/wiki/Haynes_Manuals) describes the electrical checks to diagnose a faulty unit before purchasing and fitting a replacement.

The CPS on the 4.0 Litre automatic uses one 11mm (*) bolt, the manual uses two. Access is possible from the underside of the engine. The sensor is mounted on the back of the clutch bell housing with little clearance between it and the bulkhead. It can be felt but not seen from underneath the vehicle, and seen but not accessed from the top of the engine. Use a socket with an omni directional extension and a couple of straight extensions so that the ratchet is free of the bodywork. The torque setting is fairly low, and once the socket is in place removal does not require much effort. Replacing the sensor is more difficult, the bolt must be started in its thread by hand and there is barely enough room to use your thumb. Use the socket and extensions to tighten to the correct torque setting.

(* on a Feb 97 UK spec manual the bolt heads mike up at 10.7mm across flats so there's a bit of slack. If not corroded in they come out easily enough using an 11mm socket, as did the one I measured. I dont know whether there is a special tool in exactly the right size to prevent rounding off the hex, but I still have one that's siezed in to sort... TS)


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