AXLE 8X1468 - Caterpillar

Illustration 3 g00810797
ECM connector P2
Turn the keyswitch to the OFF position.
Thoroughly inspect the J2/P2 ECM connector. Refer to Troubleshooting, "Electrical Connectors - Inspect" for details.
Perform a 45 N (10 lb) pull test on the following wires in the P2 ECM connector that are associated with the engine speed/timing sensors:
P2:48 (Crankshaft Speed/Timing +)
P2:49 (Crankshaft Speed/Timing −)
P2:58 (Camshaft Speed/Timing +)
P2:59 (Camshaft Speed/Timing −)Refer to Illustration 3.
Ensure that the latch tab on the connector is properly latched and ensure that the latch tab is fully latched.
Check the ECM connector (allen head screw) for the proper torque of 6.0 N m (55 lb in).
Repair the harness or repair the connector if a problem is found.
Ensure that the wiring harness is correctly routed and secured at the proper locations.
Ensure that the harness wiring is not pulled too tightly. When the harness wiring is pulled too tightly, vibrations or movement can cause intermittent connections.
Inspect the harness wiring for nicks and abrasions.
If the harness and the connector are OK, disconnect ECM connector J2/P2.
Use the following procedure to measure the circuit resistance for the crankshaft position sensor:Refer to Illustration 3.
Measure the resistance between P2:48 (Crankshaft Speed/Timing +) and P2:49 (Crankshaft Speed/Timing −).Note: Check for an intermittent problem (open or short) by moving the harness while you measure the resistance. Pull the wires that are directly behind the sensors and shake the wires that are directly behind the sensors.Resistance ... 75.0 to 230.0 Ohms
Use the following procedure to measure the circuit resistance for the camshaft position sensor:Refer to Illustration 3.
Measure the resistance between P2:58 (Camshaft Speed/Timing +) and P2:59 (Camshaft Speed/Timing −).Note: Check for an intermittent problem (open or short) by moving the harness while you measure the resistance. Pull the wires that are directly behind the sensors and shake the wires that are directly behind the sensors.Resistance ... 600 to 1800 OhmsExpected Result:The readings agree