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

Illustration 1	g00566225
(1) Chassis Control Module. (2) Memory Unswitched Power Fuse (MDP-F25). (3) Control Modules Switched Power Fuse (MDP-F23). (4) Cab Ground.

This fault code indicates the Chassis Control Module (CCM) has reported a reset (power off and on) to the Electronic Monitoring Center (EMC) but the EMC has not been reset. Turn the Key Start switch OFF for ten seconds, then turn the Key Start ON, this will usually reset and clear this fault.

1. Inspect all Chassis Control Module (CCM) connectors, ground wires and cab ground strap for loose fitting connectors, or pulled out terminals.

   Expected Result: There are loose connectors.

   • YES, reconnect connectors or reattach terminals for proper fit. Check fault code and if no longer active the repair is complete.

   • NO, go to Step 2.

2. Measure the Cab Main Harness resistance from the C006-5 and C006-13 to the cab ground post, while moving, or flexing the harness.

   Expected Result: There is an open in the circuit.

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 Check fault code and if no longer active the repair is complete.

   • NO, go to Step 3.

3. Measure the resistance from the cab ground post to the cab mount termination while moving or flexing the cab ground strap.

   Expected Result: There is an open in the circuit.

   • YES, locate and repair open circuit in the cab ground strap by cleaning grease, oil and/or corrosion from the ground strap attachment points. Check fault code and if no longer active the repair is complete.

   • NO, go to Step 4.

4. Measure the resistance (or with the Key Start switch ON, check for +12vdc to ground) from C006-6 to the MDP-F23 and from C006-21 to the MDP-F25, while moving or flexing the harness. Also check fuses MDP-F25 and MDP-F23 for open.

   Expected Result: There is an open in the circuit.

   • YES, locate and repair open circuit in Cab Main harness or replace fuse if faulty. Check fault code and if no longer active the repair is complete.

   • NO, go to Step 5.

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

   Expected Result: The fault code is active.

   • YES, go to Step 6.

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

6. 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 7.

7. 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.