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Home >> Jeep >> 1996 >> Grand Cherokee Limited, 5.2 Y >> Repair and Diagnosis >> External Pages >> Different car >> Section 3 (Engine Controls - Tests W/Codes - 2.5L Flex Fuel) >> Self-Diagnostic Tests >> Test TC-30A - Low Speed Fan CTRL Relay Circuit (DTC 35)

Test TC-30A - Low Speed Fan CTRL Relay Circuit (DTC 35)

WARNING: This page is about a different car, the 1994 Plymouth Acclaim and 1994 Dodge Spirit. However, it is still accessible from the selected car via links, so may be relevant.
NOTE: For circuit and connector terminal identification, see CONNECTOR IDENTIFICATION DIRECTORY TABLE  . For wiring diagrams, see WIRING DIAGRAMS  .
  1. Using DRB, erase trouble codes. Using DRB, actuate low speed radiator fan relay. If low speed radiator fan relay is not clicking, go to step 5). If low speed radiator fan relay is clicking, condition required to set trouble code is not present at this time. Go to next step.
  2. The LOW SPEED FAN CTRL RELAY CIRCUIT trouble code sets if an open or short is detected in low speed radiator fan relay Dark Blue/Pink wire. Possible causes are: open or short in low speed radiator fan relay coil windings, open or short in low speed radiator fan relay Dark Blue/Pink wire, open or short in low speed radiator fan relay Dark Blue/White wire or failed driver in PCM. Go to next step.
  3. Inspect all related wiring and connectors and repair as necessary. Perform TEST VER-2. If no problems were found with wiring and connectors, go to next step.
  4. While still actuating low speed radiator fan relay, wiggle wiring harness from low speed radiator fan relay to PCM. If relay stopped clicking while wiggling wiring harness, repair wiring and connectors as necessary. Perform TEST VER-2  . If relay did not stop clicking while wiggling wiring harness, see INACTIVE TROUBLE CODE CONDITION  . Perform TEST VER-2.
  5. Disconnect low speed radiator fan relay. Put DRB in voltmeter mode. Using DRB, check voltage on low speed radiator fan relay connector Dark Blue/White wire. If voltage is less than 10 volts, repair open in Dark Blue/White wire. Perform TEST VER-2. If voltage is more than 10 volts, turn ignition off.
  6. Using an external ohmmeter, check resistance between low speed radiator fan relay terminals. See Fig 1 . If resistance is more than 100 ohms, replace low speed radiator fan relay. If resistance is less than 100 ohms, go to next step.
    Fig 1: Testing Relay (TC-30A)
    G94C31759
  7. Disconnect PCM connector. Put DRB in ohmmeter mode. Using DRB, check resistance of low speed radiator fan relay connector Dark Blue/Pink wire. If resistance is less than 5 ohms, repair short to ground in Dark Blue/Pink wire. Perform TEST VER-2  . If resistance is more than 5 ohms, go to next step.
  8. Using an external ohmmeter, check resistance of Dark Blue/Pink wire between low speed radiator fan relay connector and PCM connector terminal No. 31. If resistance is more than 5 ohms, repair open in Dark Blue/Pink wire. Perform TEST VER-2. If resistance is less than 5 ohms, replace PCM. Perform TEST VER-2.
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