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Home >> Jeep >> 1996 >> Grand Cherokee Limited, 5.2 Y >> Repair and Diagnosis >> External Pages >> Different car >> Section 180 (Engine Controls - Tests W/Codes - 4.0L) >> Self-Diagnostic Tests >> Test TC-25A - A/C Clutch Relay Circuit (DTC 33)

Test TC-25A - A/C Clutch Relay Circuit (DTC 33)

WARNING: This page is about a different car, the 1995 Jeep Wrangler, 1995 Jeep Grand Cherokee, and 1995 Jeep Cherokee. However, it is still accessible from the selected car via links, so may be relevant.
NOTE: Perform TEST TC-1A  before proceeding with this test. For connector terminal identification, see CONNECTOR IDENTIFICATION  at beginning of article. For wiring diagrams, see WIRING DIAGRAMS  at the end of this article. Perform TEST VER-2A  after each repair.
  1. Using scan tool, actuate A/C clutch relay using scan tool. If A/C clutch relay is clicking, go to next step. If A/C clutch relay is not clicking, go to step 5).
  2. Condition required to set trouble code is not present at this time. A/C CLUTCH RELAY CIRCUIT trouble code sets if PCM detects an open or short in A/C clutch relay control circuit (Dark Blue/Orange wire on XJ and YJ bodies or Dark Blue/Red wire on ZJ body). Possible causes are: open or short in A/C clutch relay coil, open or short in A/C clutch relay control circuit (Dark Blue/Orange wire on XJ and YJ bodies or Dark Blue/Red wire on ZJ body), open or short in A/C clutch relay fused ignition feed circuit (Dark Blue/White wire on XJ and YJ bodies or Yellow/Dark Green wire on ZJ body), failed driver in PCM or defective or damaged connector terminals or wires. Go to next step.
  3. Inspect all related wiring and connectors and repair as necessary. If no problems were found with wiring and connectors, go to next step.
  4. While still actuating A/C clutch relay, wiggle wiring harness from A/C clutch relay to PCM. If relay clicking was interrupted, repair wiring harness and/or connectors as necessary. If relay clicking was not interrupted, see INACTIVE DTC CONDITION  in this article. Test is complete.
  5. Remove A/C clutch relay and ensure connector is clean and not damaged. Using scan tool in voltmeter mode, check voltage on A/C clutch relay connector, ignition feed circuit (Dark Blue/White wire on XJ and YJ bodies or Yellow/Dark Green wire on ZJ body). If voltage is more than 10 volts, go to next step. If voltage is less than 10 volts, repair open in Dark Blue/White wire on XJ and YJ bodies or Yellow/Dark Green wire on ZJ body.
  6. Using an external ohmmeter, measure resistance between A/C clutch relay terminals No. 85 and 86. If resistance is less than 100 ohms, go to next step. If resistance is more than 100 ohms, replace A/C clutch relay.
  7. Turn ignition off. Disconnect PCM 60-pin connector and ensure connector is clean and not damaged. Using scan tool in ohmmeter mode, check resistance of A/C clutch relay connector, control circuit (Dark Blue/Orange wire on XJ and YJ bodies or Dark Blue/Red wire on ZJ body). If resistance is more than 5 ohms, go to next step. If resistance is less than 5 ohms, repair short to ground in Dark Blue/Orange wire on XJ and YJ bodies or Dark Blue/Red wire on ZJ body.
  8. Using an external ohmmeter, check resistance of control circuit (Dark Blue/Orange wire on XJ and YJ bodies or Dark Blue/Red wire on ZJ body) between A/C clutch relay connector and PCM connector terminal No. 34. If resistance is more than 5 ohms, repair open in Dark Blue/Orange wire on XJ and YJ bodies or Dark Blue/Red wire on ZJ body. If resistance is less than 5 ohms, replace PCM.
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