EXTENSION AS 3566050 - Caterpillar

The harness should be free of corrosion, abrasions, and pinch points.Results:
OK - Proceed to Test Step 2.
Not OK - Repair: Repair the connectors or replace the harness. Ensure that all of the seals are correctly in place and ensure that the connectors are correctly connected.Use the electronic service tool in order to clear all logged diagnostic codes and then verify that the repair eliminates the fault.STOPTest Step 2. Check For Active Diagnostic Codes
Turn the keyswitch to the ON position. Wait at least 10 seconds for activation of the diagnostic codes.
Verify if any of the diagnostic codes that are listed in Table 1 are active:Results:
A 108-3 or 108-4 diagnostic code is active. - Proceed to Test Step 10.
Any other XXXX-3 or XXXX-4 diagnostic code is active for one or more of the pressure sensors. - Proceed to Test Step 3.
None of the preceding diagnostic codes are active. - Repair: If the codes in Table 1 are logged, an intermittent condition may be causing the logged codes. Refer to Troubleshooting, "Electrical Connectors - Inspect".STOPTest Step 3. Check the Supply Voltage at the Sensor Connector
Turn the keyswitch to the OFF position.
Disconnect the connector for the suspect sensor.
Turn the keyswitch to the ON position. Do not start the engine.
Measure the voltage between the 5 VDC supply terminal and the ground terminal on the harness connector for the suspect sensor. The voltage measurement should be 5.0 0.2 VDC.
Turn the keyswitch to the OFF position.
Reconnect the sensor.Expected Result:The voltage measurement is 5.0 0.2 VDC.Results:
The voltage measurement is within the expected range. - The correct supply voltage is reaching the sensor. Proceed to Test Step 5.
The voltage measurement is not within the expected range. - Proceed to Test Step 4Test Step 4. Check the Supply Voltage From the ECM
Turn the keyswitch to the OFF position.
Disconnect the P2 connector from the ECM.
Turn the keyswitch to the ON position.
Use a suitable multimeter to measure the voltage between the 5 VDC supply pin on the J1 connector and the ground pin on the J1 connector for the suspect sensor. The voltage measurement should be 5.0 0.2 VDC.
Turn the keyswitch to the OFF position.Results:
The voltage measurement is within the expected range. - The fault is in the 5 VDC supply wire or the ground wire between the suspect sensor and the ECM.Repair: Replace the faulty wiring.Use the electronic service tool to clear all logged diagnostic codes and verify that the repair eliminates the fault.STOP
The voltage measurement is not within the expected range. - Proceed to Test Step 10.Test Step 5. Check the Type of Diagnostic Code that is Active
Turn the keyswitch to the ON position. Wait at least 10 seconds for activation of the diagnostic codes.
Use the electronic service tool to check for active diagnostic codes. Record all active diagnostic codes.
Determine if the fault is related to an open circuit diagnostic code or a short circuit diagnostic code.Results:
Short Circuit - A XXXX-4 diagnostic code is active for one or more of the pressure sensors at