WASHER-HARD 7X0618 - Caterpillar

This procedure covers the following diagnostic trouble codes:
Table 1
Code and Description Conditions which Generate this Code System Response
1136-2
Engine ECU Temperature : Erratic, Intermittent, or Incorrect The internal ECM temperature sensor is defective. The code is logged.
1136-3
Engine ECU Temperature : Voltage Above Normal
1136-4
Engine ECU Temperature : Voltage Below Normal
1136-15
Engine ECU Temperature :High - least severe (1) The ECM temperature is greater than allowed. The code is logged.
1136-16
Engine ECU Temperature High - moderate severity (2) The ECM temperature is greater than allowed. The code is logged.
1136-17
Engine ECU Temperature Engine ECU Temperature : Low - least severe (1) The ECM temperature is greater than allowed. The code is logged.
1136-18
Engine ECU Temperature Low - moderate severity (2) The ECM temperature is greater than allowed. The code is logged. Recommended Actions
Note: The procedures have been listed in order of probability. Complete the procedures in the order of the listed test steps.
Table 2
Troubleshooting Test Steps Values Results
1. Check for Codes
A. Connect Cat® Electronic Technician (ET) to the service tool connector.
B. Determine if a code is active or logged.
Codes
Result: A 1136-2, 1136-3, or 1136-4 code is active or logged.
Repair: Replace the ECM, refer to Troubleshooting, "ECM - Replace".
Verify that the repair eliminated the problem.
Result: A 1136-15, 1136-16, 1136-17, 1136-18 code is active or logged.
Proceed to Test Step 2.
2. Check Environmental Temperatures
A. Verify that engine compartment temperatures are not excessively high or low. Verify engine compartment ventilation and cooling.
Environmental Temperatures
Result: No problems are found within the engine compartment heating or cooling systems.
Repair: Replace the ECM.
Result: A problem was found with the engine compartment heating or cooling system.
Repair: Repair the contributing factors to excess heating or cooling.
If the procedure did not correct the issue, contact your Cat dealer Technical Communicator (TC). For further assistance, your TC can confer with the Dealer Solutions Network (DSN).