ADAPTER AS 3475345 - Caterpillar

Illustration 2 g01113625
Engine speed/timing sensors
(1) Brackets
(2) Integral connectors
(3) O-ring seals
(4) Sensors Test Step 1. Check for Diagnostic Codes
Connect Caterpillar Electronic Technician (ET) to the service tool connector.
Restore electrical power to the ECM.
Start the engine and run the engine. The problem may occur when the engine is at any operating temperature. However, the problem is more likely to occur when the engine is at the normal operating temperature.
If the engine will not start, monitor the engine speed on Cat ET while the engine is being cranked. Cat ET may need to be powered from another battery while the engine is being cranked. This is done so that Cat ET will not reset. Note: Upon initial cranking, the status for engine speed may indicate that the engine speed signal is abnormal. This message should be replaced with an engine speed once the ECM is able to calculate a speed from the signal.
Wait at least 30 seconds for activation of the diagnostic codes. Look for these codes on Cat ET:
190-08
342-08Expected Result:One or both of the diagnostic codes that are listed above are logged or active.Note: If the engine will not start and Cat ET displayed 0 rpm during cranking, select "No Engine rpm".Results:
No Engine rpm - Engine rpm is not indicated on Cat ET. Proceed to Test Step 2.
Active Code or logged code - There is an active diagnostic code or a logged diagnostic code for an engine speed/timing sensor. Proceed to Test Step 3.Test Step 2. Inspect the Sensor Assembly
Remove electrical power from the engine ECM.
Remove the engine speed/timing sensors from the engine.
Ensure that one O-ring seal is installed on each sensor, and ensure that the O-ring seals are free of damage. Expected Result:Two undamaged O-ring seals are properly installed. The brackets are not bent. The flange for each sensor can be flush against the housing.Results:
OK - Two undamaged O-ring seals are properly installed. The brackets are not bent. The flange for each sensor can be flush against the housing.Repair: Perform the following procedure in order to properly install a sensor assembly:
Lubricate the O-ring seal with oil.
Fully seat the sensor into the housing.
Tighten the bracket bolt.
Connect the connector and verify that the latch tab of the connector is latched on both sides.
Ensure that the harness is properly secured, and ensure that the harness is attached to the harness clip. Proceed to Test Step 3.
Not OK - The sensor assembly has a mechanical problem.Repair: Replace the sensor assembly.Note: Do not switch the positions of the sensors. The sensors are not interchangeable. A timing calibration is not required when the sensors are replaced.
Lubricate the O-ring with oil.
Fully seat the sensor into the housing.
Tighten the bracket bolt.
Connect the connector and verify that the latch tab of the connector is latched on both sides.
Ensure that the harness is properly secured, and ensure that the harness is attached to the harness clip. Verify that the problem is resolved.STOPTest Step 3. Inspect the Electrical Connectors and Wiring
Remove electrical power from the ECM.
Illustration 3 g01200239
Typical location of sensors
(5) Secondary