LINES GP-AIR 4W0711 - Caterpillar

Illustration 1 g00902820
+5 V supply circuit
Illustration 2 g00898567
P2 ECM connector (wire side)
Illustration 3 g00898570
P2 ECM connector (ECM side)
Illustration 4 g00810608
Sensor connectorTest Step 1. Disconnect the ECM Connectors and Check for Active Diagnostic Codes
Turn the keyswitch to the OFF position.
Connect the Caterpillar Electronic Technician (Cat ET) to the service tool connector.
Disconnect the P2 ECM connector from the ECM.
Check the connectors for corrosion and for moisture. Make repairs, if necessary.
Turn the keyswitch to the ON position.
Check for active diagnostic codes on Cat ET.Note: Several diagnostic codes will be active. Look for 5 Volt diagnostic codes and clear all of the other codes after this test.Expected Result:The 5 volt diagnostic codes are not active. An open circuit diagnostic code is active for all of the engine pressure sensors.Results:
OK - The 5 volt diagnostic codes are not active.Repair: Reconnect the P2 ECM connector. Proceed to Test Step 2.
Not OK - A 262-03 code or a 262-04 code is still active.Repair: Connect a test ECM.If the test ECM fixes the problem, reconnect the suspect ECM.If the problem returns, permanently install the new ECM.Verify that the