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Home >> Jeep >> 1996 >> Grand Cherokee Limited, 5.2 Y >> Repair and Diagnosis >> External Pages >> Different car >> Section 209 (Diagnosis - 42RH, 46RH & 47RH) >> Diagnostic Tests >> Test NTC-2A - Checking Overdrive Circuit

Test NTC-2A - Checking Overdrive Circuit

WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 1995 Jeep Grand Cherokee, 1995 Dodge Ram Wagon, 1995 Dodge Ram Van, 1995 Dodge Pickup, and 1995 Dodge Dakota. However, it is still accessible from the selected car via links, so may be relevant.
NOTE: For connector terminal identification, refer to CONNECTOR IDENTIFICATION  . For appropriate wiring diagram, refer to WIRING DIAGRAMS  . After each repair, perform VERIFICATION TEST VER-1A  .
  1. If vehicle fails to go into overdrive, perform TEST NTC-2B  . If vehicle goes into overdrive, ensure coolant temperature is more than 69°F (21°C) before proceeding. Using scan tool read overdrive switch state.
  2. Turn overdrive switch on and off while observing scan tool display. If overdrive switch state changes between 4 ALLOW and 3 SPD, repair transmission as necessary. If overdrive switch state does not change between 4 ALLOW and 3 SPD, turn ignition off.
  3. Disconnect Powertrain Control Module (PCM) connector. Using scan tool in ohmmeter mode, check resistance at terminal No. 10 on PCM connector. Turn overdrive switch on and off while observing scan tool display. If display changes from less than 5 ohms to more than 5 ohms, replace PCM. If display does not change from less than 5 ohms to more than 5 ohms, go to next step.
  4. Disconnect overdrive switch harness connector. Using external ohmmeter, check resistance between terminal No. 10 at PCM connector and Orange/White wire at overdrive switch connector.
  5. If resistance is more than 5 ohms, repair open overdrive switch sense circuit. If resistance is 5 ohms or less, replace overdrive switch.
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