ENGINE AR-PRIM 4177275 - Caterpillar

Table 2
Diagnostic Codes and Descriptions with Corresponding ECM Outputs
Code Description ECM Output
323-3 Engine Shutdown Lamp : Voltage Above Normal "Engine fault output"
324-3 Warning Lamp (Action) : Voltage Above Normal "Action alarm output"
443-3 Crank Terminate Relay : Voltage Above Normal "Crank terminate output"
445-3 Run Relay : Voltage Above Normal "Engine running output" Expected Result:There are no active diagnostic codes. The "Engine Running" indicator and the "Crank Terminate" indicator (if equipped) illuminated normally. The "Action Alarm" indicator and the "Engine Fault" indicator did not illuminate.Results:
Logged 323-3 or 324-3 - There are no active diagnostic codes that are related to the indicator lamps at this time. Either a 323-3 code or a 324-3 code is logged.Repair: When the engine was started, the "Engine Running" indicator and the "Crank Terminate" indicator (if equipped) illuminated normally. The "Action Alarm" indicator and the "Engine Fault" indicator did not illuminate. The 323-3 and 324-3 diagnostic codes can only be activated when the corresponding indicator is activated. There may still be a problem with the output for the alarm indicator or with the shutdown indicator. The alarm and/or the shutdown must be activated.Allow the engine to remain running. Proceed to Test Step 3.
Logged 443-3 or 445-3 - There are no active diagnostic codes that are related to the indicator lamps at this time. Either a 443-3 or 445-3 is logged.Repair: When the engine was started, the "Engine Running" indicator and the "Crank Terminate" indicator (if equipped) illuminated normally. The "Action Alarm" indicator and the "Engine Fault" indicator did not illuminate. There are no active diagnostic codes.The outputs for the status indicators seem to be operating correctly at this time. The original diagnostic code was probably caused by a poor electrical connection.If an intermittent electrical problem is suspected, refer to Troubleshooting, "Electrical Connectors - Inspect" for information that is related to troubleshooting intermittent electrical problems.STOP
Active 323-3 or 324-3 - There is an active 323-3 or 324-3. There must be a shutdown condition before a 323-3 diagnostic code can be generated. There must be an alarm condition before a 324-3 diagnostic code can be generated. Both of these conditions are serious.Repair: Use Cat ET to determine the event code or the diagnostic code for the shutdown condition that corresponds to the 323-3 or 324-3 diagnostic code. Before continuing, troubleshoot that event code or that diagnostic code before you troubleshoot the 323-3 or 324-3 diagnostic code. Refer to Troubleshooting, "Event Codes" or Troubleshooting, "Diagnostic Trouble Codes".Exit this procedure. After you have resolved the condition, return to this procedure in order to troubleshoot the 323-3 and/or 324-3 diagnostic code, if necessary.STOP
Active 443-3 or 445-3 - When the engine was started, the "Engine Running" indicator and/or the "Crank Terminate" indicator (if equipped) did not illuminate normally. The "Action Alarm" indicator and the "Engine Fault" indicator did not illuminate. A 443-3 or 445-3 diagnostic code was activated. There is a problem with the output for the "Engine Running" indicator and/or with the "Crank Terminate" indicator (if equipped). Proceed to Test Step 4.Test