Cherokee 4WD V6-173 2.8L VIN W 2-bbl (1985)
1.
Disconnect the sensor wires.
2.
Connect an ohmmeter to the wire terminal pins in the sensor connector and note the resistance on the ohmmeter.
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The sensor is OK if the ohmmeter indicates 6 to 10 ohms resistance.
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If no resistance is indicated, the sensor is faulty and should be replaced.
Brake/Power Steering/Windshield Washer/ Engine Coolant Sensors
NOTE:
These sensors must be removed for test purposes.
1.
Remove the sensor.
2.
Connect an ohmmeter to the wire connector terminal pins in the sensor connector.
3.
Turn the sensor upside down to simulate a full reservoir condition and note the resistance on the ohmmeter.
*The sensor is OK if the resistance is between 2640 and 3960 ohms in this position.
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The sensor is faulty if the resistance is below 2640 ohms or above 3960 ohms.
4.
Turn the sensor right side up to simulate an empty reservoir (closed circuit) condition and note the resistance on the ohmmeter.
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The sensor is OK if the ohmmeter indicates no resistance in this position.
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The sensor is faulty if resistance is indicated.
Front Disc Brake Pad Wear Sensor
This sensor cannot be tested. It is a single wire, one-time use component that only activates when grounded against the rotor surface. The sensor and
4-amp signal fuse must both be replaced along with the brake pads after being activated.
SYSTEMS SENTRY COMPONENT REPLACEMENT
Fluid Level-Type Sensor Replacement
1.
Disconnect the battery negative cable.
2.
Disconnect the sensor wires.
3.
Remove the original sensor and install the replacement sensor.
NOTE:
On automatic transmission models, the sensor is an integral part of the transmission dipstick. If the sensor is inoperative, the sensor and
dipstick must be replaced as an assembly.
4.
Connect the sensor wires.
5.
Connect the battery negative cable and verify the circuit operation.
Disc Brake Pad Sensor and Signal Fuse Replacement
1.
Remove the brake pads as outlined in M.R. 244.
2.
Tap the old sensor out of each inboard brake pad with a hammer and punch.
3.
Install the replacement sensors in the new inboard brake pads and snap the sensors into place.
4.
Install the brake pads as outlined in M.R. 244.
5.
Replace the 4-amp signal fuse as follows:
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Locate the 4-amp, in-line signal fuse in the 20 gauge wire (black with red tracer). This wire is taped to the wire harness along the right side of
the steering column.
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Replace the signal fuse.