PLATE 5567359 - Caterpillar

Illustration 10 g01822163
Terminal locations at the connector for the low current power distribution panel for the temperature control module (Terminal 31) +Battery to the temperature control module (Terminal 32) −Battery to the temperature control module (Terminal 47) +Battery to the emergency stop switch for the control circuit of the keyswitch relay (Terminal 60) Return for the control circuit of the keyswitch relay (Terminal 63) Keyswitch power for the secondary circuit of the keyswitch relay
Illustration 11 g01241538
Terminal locations at the temperature sensor at the outlet of the coolant pump (Terminal 1) Sensor signal (Terminal 2) Return
Table 2
Troubleshooting Test Steps    Values    Results    
1. Check for Active Diagnostic Codes
A. Connect Cat ET to the service tool connector.
B. Restore the electrical power to the ECM.
C. Monitor the diagnostic codes on Cat ET. Check and record any diagnostic codes.
Note. Wait at least 30 seconds in order for the diagnostic codes to become active.
D. Determine if a diagnostic code has occurred several times.
Note. A diagnostic code that is logged several times is an indication of an intermittent problem. Most intermittent problems are the result of a bad connection between a socket and pin in the connector. An intermittent problem may also be caused by a poor connection between a wire and terminal.
E. Look for the following diagnostic codes that are active or logged:
- 168-3
- 168-4
- 2349-19
- 2853-9
- 2854-9
- 4193-2
- 4193-3
- 4193-4
F. Remove the electrical power from the ECM.
   
Codes    
Result: No diagnostic codes are active for the TCM.
There may be an intermittent problem in the harness or in a connector. If an intermittent problem is suspected, refer to Troubleshooting, "Electrical Connectors - Inspect" for the correct procedures for inspecting electrical connectors..
Result: A 168-3 or 168-4 diagnostic code is active. The TCM has detected there is a problem with the supply voltage to the unit.
Proceed to Test Step 2.
Result: AA 2853-9 diagnostic code is active. The ECM detects a problem with data link communications for the Aftercooler Coolant TCM.
Proceed to Test Step 2.
Result: A 2854-9 diagnostic code is active. The ECM detects a problem with data link communications for the TCM.
Proceed to Test Step 2.
Result: The 2349-19 diagnostic code is active. The ECM is reporting that the TCM detects a problem in the circuit for the temperature sensor at the coolant pump.
Proceed to Test Step 4.
Result: The 4193 diagnostic code is active. The TCM detects a problem in the circuit for the temperature sensor at the coolant pump
Proceed to Test Step 4.    
2. Check the Supply Voltage at the TCM
A. Disconnect the harness connector at the TCM.
B. Restore the electrical power to the ECM. Ensure that the emergency stop switch is in the RUN position. Do not start the engine.
C. Use a multimeter to measure the supply voltage between terminal 1 (+Battery) and terminal 5 (−Battery) on the harness side of the connector.
D. Remove the electrical power from the ECM.
   
Supply voltage between 18 V and 32 V.    
Result: The supply voltage is between 18 V and 32 V. The supply