Cherokee 4WD L6-4.0L VIN S (1998)
Keyless Entry Receiver: Component Tests and General Diagnostics
If the problem being diagnosed is an inoperative RKE horn chirp feature, be certain that the horn chirp feature has not been disabled by performing the
Remote Keyless Entry (RKE) Receiver Programming procedure as described. Also be certain that the vehicle horn system is operational. See Lighting
and Horns/Horn Systems for more information.
If the problem being diagnosed is an inoperative RKE illuminated entry system, be certain that the interior courtesy lamp system is operational. See
Lighting and Horns/Lamps for more information.
Before you proceed with diagnosis of the RKE receiver, see the diagnosis for Body and Frame/Locks/Keyless Entry/Remote Keyless Entry Transmitter.
1. Check the fuses in the Power Distribution Center (PDC) and the junction block. If OK, go to Step 2. If not OK, repair the shorted circuit or
component as required and replace the faulty fuse.
2. Disconnect and isolate the battery negative cable. Remove the Remote Keyless Entry (RKE) receiver as described. Unplug the wire harness
connector from the RKE receiver.
3. Check the wire harness connector and the receptacle in the receiver for loose, corroded, or damaged terminals and pins. If OK, go to Step 4. If not
OK, repair as required.
4. Check for continuity between each of the two ground circuit cavities of the RKE receiver wire harness connector and a good ground. In each case,
there should be continuity If OK, go to Step 5. If not OK, repair the circuit to ground as required.
5. Connect the battery negative cable. Check for battery voltage at each of the two fused B(+) circuit cavities of the RKE receiver wire harness
connector. If OK, go to Step 6. If not OK, repair the open circuit to the PDC or the junction block as required.
6. If the problem being diagnosed involves only the RKE horn chirp feature, go to Step 10. If the problem being diagnosed involves only the RKE
illuminated entry feature, go to Step 9. If the problem being diagnosed involves only the RKE power locks feature, go to Step 7.
7. Disconnect and isolate the battery negative cable. Unplug the 8-way Passenger Door Module (PDM) wire harness connector. Check for continuity
between the lock request circuit cavity of the RKE receiver wire harness connector and a good ground. Repeat the test between the unlock request
circuit cavity of the RKE receiver wire harness connector and a good ground. In each case, there should be no continuity. If OK, go to Step 8. If
not OK, repair the shorted circuit as required.
8. Check for continuity between the lock request circuit cavities of the RKE receiver wire harness connector and the 8-way PDM wire harness
connector. Repeat the test between the unlock request circuit cavities of the RKE receiver wire harness connector and the 8-way PDM wire harness
connector. In each case, there should be continuity If OK, replace the faulty RKE receiver. If not OK, repair the open circuit as required.
9. Check for continuity between the door ajar circuit cavity of the RKE receiver wire harness connector and a good ground with the driver door
closed. There should be no continuity until the driver door is opened. If OK, replace the faulty RKE receiver. If not OK, repair the circuit or
replace the faulty driver door ajar switch as required.
10. Unplug the horn relay from the junction block. Check for continuity between the horn relay output circuit cavity of the RKE receiver wire harness
connector and a good ground. There should be no continuity. If OK, go to Step 11. If not OK, repair the short circuit to the horn relay as required.
11. Check for continuity between the horn relay output circuit cavity of the RKE receiver wire harness connector and the junction block cavity for the
horn relay coil ground terminal (85). There should be continuity. If OK, replace the faulty RKE receiver. If not OK, repair the open circuit to the
junction block as required.
