CLAMP-PIPE 9Y8315 - Caterpillar

System Operation Description:Use this procedure to troubleshoot the electrical system if a problem is suspected with the indicator lights or if another procedure has sent you here.Use this procedure to troubleshoot any suspect problems with the following indicator lamps:
Maintenance indicator lamp
Warning lamp
Diagnostic lampThe indicator lamps are activated by the Electronic Control Module (ECM) in order to inform the operator of various engine conditions. When the keyswitch is placed in the ON position, the diagnostic lamp and the warning lamp are illuminated by the ECM for a brief period. The ECM provides a high side driver for all of the lamp outputs. The most likely cause of a problem with an indicator lamp is the bulb. The next most likely cause is a problem with a wire or with a connector. The least cause is a problem with the ECM.Note: An override feature is available in Caterpillar Electronic Technician (ET) for each of the lamp circuits. The override can be used to troubleshoot the lamp circuits.
Illustration 1 g01382261
Schematic for the engines lamp circuitsNote: There is a configuration parameter that is associated with the maintenance indicator lamp. Ensure that these parameters are configured correctly prior to troubleshooting the lamp circuits. Refer to Troubleshooting, "Configuration Parameters" for information that is related to the configuration of the lamp circuits.
The connection of any electrical equipment and the disconnection of any electrical equipment may cause an explosion hazard which may result in injury or death. Do not connect any electrical equipment or disconnect any electrical equipment in an explosive atmosphere.
Test Step 1. Inspect the Electrical Connectors and the Wiring
Remove electrical power from the ECM.
Illustration 2 g02547600
Locations of the connectors that are associated with the lamp circuits (typical left rear engine view) (1) J1/P1 ECM connectors (2) J2/P2 ECM connectors
Thoroughly inspect connectors (1), (2). Also, thoroughly inspect any of the other connectors that are associated with the lamp circuits. Refer to the Schematic of the engine for connector locations. Refer to Troubleshooting, "Electrical Connectors - Inspect".
Illustration 3 g01382292
Terminal locations at the P1 ECM connector that are for the lamp circuits (P1-28) Diagnostic lamp (P1-29) Warning lamp (P1-30) Maintenance indicator lamp
Perform a 45 N (10 lb) pull test on each of the wires for the lamp circuits.
Check the torque of the allen head screw on the ECM connectors and the engine interface connectors. Refer to Troubleshooting, "Electrical Connectors - Inspect" for the correct torque values.
Check the harness and the wiring for abrasion and for pinch points from the dash display back to the ECM.Expected Result:All of the connectors, pins, and sockets are coupled and/or inserted and the harness and wiring are free of corrosion, of abrasion and of pinch points.Results:
OK - The harness and connectors appear to be in good repair. Proceed to Test Step 2.
Not OK - The connectors and/or wiring need repair.Repair: Repair the wiring and/or the connectors. Replace parts, if necessary. Ensure that all of the seals are properly in place and ensure that the connectors are coupled. Verify that the repair eliminates the problem.STOPTest Step