PLUG AS-CONNECTOR 1762942 - Caterpillar

Use this test under the following circumstances:
168-00
168-01
168-02
Intermittent engine shutdowns
Difficulty in starting that is not accompanied by loss of electrical accessoriesNote: Some codes can be generated by rapidly cycling the keyswitch. If this occurs, clear the logged diagnostic codes in order to prevent future confusion or an incorrect diagnosis.Engine shutdowns that are accompanied by a loss of other electrical accessories indicate a problem in the keyswitch or in the load reduction relay circuit. This does not indicate a problem in the wiring at the Electronic Control Module (ECM). Verify that there are no problems with the starting system or the charging system before you use this test.There is one wire from the +Battery and there is one wire from the −Battery to the ECM. The ECM continuously receives battery voltage through a breaker. When the ECM detects battery voltage at the "switched" input, the ECM will power up. When battery voltage is removed from this input, the ECM will power down. The current draw from the batteries is approximately three amperes when the keyswitch is in the ON position and the engine is running. The current draw from the batteries is zero when the keyswitch is in the OFF position.The engine ECM requires the keyswitch to be in the ON position in order to maintain communications.
Illustration 1 g00755287
Schematic
Test Step 1. Inspect Electrical Connectors and Wiring
Illustration 2 g01089706
Terminal locations for ECM
Turn the keyswitch to the OFF/RESET position.
Thoroughly inspect the harness connector J1/P1 and the machine connector J3/P3. Also inspect the connections for the battery to the ECM. Inspect the connections from the keyswitch to the ECM. Refer to the diagnostic functional test Troubleshooting, "Electrical Connectors - Inspect" for details.
Perform a 45 N (10 lb) pull test on each of the wires in the ECM connector that are associated with the following connections:
P1:04 (+Battery (unswitched))
P1:05 (−Battery)
P1:06 (+Battery (switched))
Check the ECM connector (allen head screw) for the proper torque of 6.0 N m (55 lb in).
Check the harness and wiring for abrasions and for pinch points from the battery to the ECM. Also, check the harness and wiring for abrasions and for pinch points from the keyswitch to the ECM. Expected Result:All connectors, pins, and sockets are completely coupled and/or inserted. The harness and wiring are free of corrosion, of abrasion, and of pinch points.Results:
OK - The harness and connectors appear to be OK. Proceed to Test Step 2.
Not OK - There is a problem with the connectors or wiring.Repair: Repair the connectors or wiring and/or replace the connectors or wiring. Ensure that all of the seals are properly in place and ensure that the connectors are completely coupled.STOPTest Step 2. Check the Battery Voltage at the ECM
Disconnect engine harness connector P1 from ECM connector J1.
Turn the battery disconnect switch to the ON position.
Turn the keyswitch to the ON position.
Measure the voltage between terminal P1:04 (+Battery (unswitched)) and engine ground.
Measure the voltage between terminal P1:06 (+Battery (switched)) and engine ground. Expected Result:The measured voltage is between 11.0 VDC and 13.5 VDC for a 12