VALVE AS-DRAIN 4521934 - Caterpillar

Illustration 1 g00562499
Location of the Solenoid Valve (No. 3) (Transmission Fourth Speed Clutch)
(1) Number 6 clutch solenoid modulating valve (First Speed). (2) Number 5 clutch solenoid modulating valve (Second Speed). (3) Number 1 clutch solenoid modulating valve (Reverse). (4) Number 3 clutch solenoid modulating valve (Fourth Speed). (5) Number 2 clutch solenoid modulating valve (Forward). (6) Number 4 clutch solenoid modulating valve (Third Speed).
The six clutch solenoid modulating valves are mounted on the top of the transmission under the cab. There is one clutch solenoid modulating valve for each of the six transmission clutches.
Illustration 2 g00687599
Schematic of the Solenoid Valve (No. 3) (Transmission Fourth Speed Clutch)
This diagnostic code is associated with the Solenoid Valve (No. 3) (Transmission Fourth Speed Clutch). The FMI 05 means that the ECM has determined that the current of the solenoid is below normal. The possible causes of this diagnostic code are listed below:
The energize circuit of the solenoid is open.
The return circuit of the solenoid is open.
The solenoid has failed.
The ECM has failed. This is unlikely. Note: The following test procedure may create other diagnostic codes. Ignore these created diagnostic codes and clear these diagnostic codes when the original diagnostic code has been corrected. Ensure that the diagnostic code of CID 1403 FMI 05 is active before performing this procedure.Note: Use the 146-4080 Digital Multimeter for the measurements in this procedure.System Response:When this diagnostic code occurs, only the gears that use solenoids that have diagnostic codes are not available.Test Step 1. CHECK THE SOLENOID.
Turn the disconnect switch and the key start switch to the ON position. Do not start the engine.
Disconnect the solenoid with the active diagnostic code from the machine harness.
At the machine harness connector for the solenoid, place a jumper wire from contact 1 (wire 754-BU(Blue)) to contact 2 (wire 975-WH(White)).
Observe the status of the CID 1403 FMI 05. Expected Result:The CID 1403 FMI 05 remains active. The FMI has not changed and the "05" is still active.Results:
YES - The diagnostic code remains active. The jumper wire does not affect the diagnostic code. Proceed to Test Step 2.
NO - The diagnostic is no longer active. The solenoid has failed.Repair: The solenoid has failed. Repeat this Test Step "CHECK THE SOLENOID" in order to verify the solenoid failure. Replace the solenoid. Verify that the new solenoid corrects the problem.STOPTest Step 2. CHECK THE HARNESS FOR AN OPEN.
Turn the key start switch and the disconnect switch to the OFF position.
Disconnect the machine harness connector(s) from the ECM.
The jumper wire that was installed in the previous Test Step remains in place.
At the machine harness connector, measure the resistance from signal contact J2-7 (wire 754-BU(Blue)) to contact J2-3 (wire 975-WH(White)). Expected Result:The resistance is less than 5.0 ohms.Results:
OK - The resistance is less than 5.0 ohms. The machine harness is correct. Proceed to Test Step 3.
NOT OK - The resistance is greater than 5000 ohms. The resistance measurement is not correct. There is an open circuit in the machine harness.Repair: The open is in wire 754-BU(Blue)