RETAINER-BRAKE 1616436 - Caterpillar

Table 1
Diagnostic Trouble Codes
J1939 Code Code Description Comments
1485-2 Main relay is locked in closed position. Key Switch is Off
Engine Stops
ECM Main Relay stays active longer than 1 second without command
Table 2
Troubleshooting Test Steps Values Results
1. Check the ECM Main Relay
Damaged wire or connector
Result: ECM Main Relay is OK.
Return to Service
Result: ECM Main Relay is Not OK
Refer to the machines Electrical Schematic to troubleshoot the machines electrical circuit for the ECM Main Relay. For how the engine ECM is powered on, refer to the following:
For the SSL, ; MTL, and ; CTL refer to the Machine Electronic controls System, UENR3699, "Starting System".
For the 906M - 908M and 910k, 914K refer to machines Electrohydraulic System.
For 308E2 refer to the machines Troubleshooting System.
Starter Relay
Table 3
Code Description Pre-Conditions for Code Notes
677-3 Starter Relay Driving Error (only applies to C3.8 Tier 4 Final / Stage IV) Battery voltage is normal.
Starter switch signal (P1/J1 Terminal 12) is not activated.
Starter relay is on. +B short of relay driving circuit when relay is on.
+B short Circuit.