MANIFOLD 6T5860 - Caterpillar

Illustration 1 g00315944
Typical Schematic for Pulse Width Modulated Sensor (PWM)When you are testing a sensor, it is necessary to identify the connector contacts and the harness wires. The Electrical System Schematic shows the connector contact numbers and corresponding wire numbers. See the Electrical System Schematic in the Service Manual.
Table 1
Tools Needed    
9U-7330     Multimeter     1    
7X-1710     Multimeter Probe Group     1    Test Step 1. TROUBLESHOOT THE SENSORS.Troubleshoot sensor circuits in the following order.
Perform the Troubleshooting, "Sensor Signal Voltage" procedure. This procedure checks the sensor voltages at the sensor while the circuits remain connected. DISCONNECT NOTHING. Troubleshoot "as is" before disconnecting any circuits. Disconnecting circuits first may alter a poor connection. Proving the original cause of a problem may be difficult or impossible.Expected Result:The Troubleshooting, "Sensor Signal Voltage" procedure has determined the cause of the problem.Results:
OK - This test step has determined the cause of the problem.STOP
NOT OK - This test step has NOT determined the cause of the problem. Proceed to test step 2.Test Step 2. TROUBLESHOOT THE SENSORS
Perform the Troubleshooting, "Sensor Dynamic Operation" procedure. This is an additional test. This will test the sensor during actual operating conditions. Expected Result:The Troubleshooting, "Sensor Dynamic Operation" procedure has determined the cause of the problem.Results:
OK - This test step has determined the cause of the problem.STOP
NOT OK - This test step has NOT determined the cause of the problem.Repair: If the sensor and the harness are correct, the ECM may have failed. Replace the ECM. See Testing and Adjusting, "Electronic Control Module (ECM) - Replace".STOP