Challenger 35, Challenger 45 and Challenger 55 Agricultural Tractors Electronic Systems Caterpillar

Illustration 1	g00566356
(1) Chassis Control Module. (2) Aftercooler Temperature Sensor.

This fault code indicates the aftercooler temperature sensor has a lower than normal voltage and may be due to the sensor shorted or a short to ground.

1. Visually inspect Rear Main harness, Front Main harness and connectors (C002, C008 and C106) for damage.

   Expected Result: There is damaged parts or broken parts.

   • YES, repair damage to harness or connectors as appropriate. Check fault codes. If fault code is not active, repair is complete.

   • NO, go to Step 2.

2. Check sensor for a short circuit between C106-A and C106-B. Also check from C106-A to chassis ground.

   Expected Result: There is a short in the circuit.

   • YES, replace aftercooler temperature sensor with a new sensor and recheck fault codes. If fault code is not active, repair is complete.

   • NO, go to Step 3.

3. Disconnect connectors C002. Check for short circuit in Front Main and Rear Main harnesses between connector C106-A and C106-B. Also check from C106-A to chassis ground.

   Expected Result: There is a short in the circuit.

   • YES, go to Step 4.

   • NO, go to Step 6.

4. Disconnect connectors C002 and C008. Check for short circuit in Front Main harness between connector C106-A and C106-B. Also check from C106-A to chassis ground.

   Expected Result: There is a short in the circuit.

   • YES, locate and repair short circuit in Front Main harness. Check fault code and if no longer active the repair is complete.

   • NO, go to Step 5.

5. Check for short circuit in Rear Main harness between connector C002-25 and C002-8. Also check between C002-25 and chassis ground.

   Expected Result: There is a short in the circuit.

   • YES, locate and repair short circuit in Rear Main harness. Check fault code and if no longer active the repair is complete.

   • NO, go to Step 6.

6. Download latest control module software into all control modules.

   Expected Result: The fault code is active.

   • YES, go to Step 7.

   • NO, repair is complete. Calibrate transmission and three-point hitch.

7. Replace the Chassis Control Module (CCM).

   Expected Result: The fault code is active.

   • YES, install the original CCM and repeat this troubleshooting procedure.

   • NO, go to Step 8.

8. Install the original CCM.

   Expected Result: The fault code is active.

   • YES, original CCM was faulty. Replace original CCM with new CCM. If fault code is not active, repair is complete. Download latest control module software into all modules. Calibrate transmission and three-point hitch.

   • NO, this fault code may have been caused by faulty connectors. Keep the original on the tractor. Clean all terminals on the CCM and reconnect. If fault code is not active, repair is complete. Download latest control module software into all modules. Calibrate transmission and three-point hitch.