Test TC-26A - Rad Fan Control Relay Circuit (DTC 35)
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.
- Using scan tool, actuate radiator fan relay. If radiator fan relay is clicking, go to next step. If radiator fan relay is not clicking, go to step 5).
- Condition required to set trouble code is not present at this time. RAD FAN CONTROL RELAY CIRCUIT trouble code sets if PCM detects an open or short in radiator fan relay control circuit (Dark Blue/Pink wire). Possible causes are: open or short in radiator fan relay coil, open or short in radiator fan relay control circuit (Dark Blue/Pink wire), open or short in radiator fan relay ignition feed circuit (Dark Blue/White wire), PCM failure, or defective or damaged connector terminals or wires. Go to next step.
- Inspect all related wiring and connectors and repair as necessary. If no problems were found with wiring and connectors, go to next step.
- While still actuating radiator fan relay, wiggle wiring harness from radiator fan relay to PCM. If wiggling wiring harness interrupted radiator fan relay clicking, repair wiring harness as necessary. If wiggling wiring harness did not interrupt radiator fan relay clicking, see INACTIVE DTC CONDITION in this article. Test is complete.
- Disconnect radiator fan relay and ensure connector is clean and not damaged. Using scan tool in voltmeter mode, check voltage on radiator fan relay connector, fused ignition feed circuit (Dark Blue/White wire). 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.
- Using scan tool in ohmmeter mode, measure resistance between radiator fan 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 radiator fan relay.
- 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 radiator fan relay connector, control circuit (Dark Blue/Pink wire). 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/Pink wire.
- Using an external ohmmeter, check resistance of control circuit (Dark Blue/Pink wire) between radiator fan relay connector and PCM connector terminal No. 31. If resistance is more than 5 ohms, repair open in Dark Blue/Pink wire. If resistance is less than 5 ohms, replace PCM.