SEAL GP-METAL FACE 3836954 - Caterpillar

The signal for the transmission gear selector is abnormal.Troubleshooting:The transmission gear selector is not in the normal range for the active control station. This diagnostic code will occur on the active control station only.If this diagnostic code is active when an integrated control head is the active control station, replace the integrated control head. Continue with this procedure if the diagnostic code is active when a slim line control head is the active control station.Note: The power train control processor receives this diagnostic code from the active control station.Test Step 1. ACTIVATE THE STATION AND DUPLICATE THE PROBLEM.
Return the gear selector to the NEUTRAL position.
Turn the keyswitch ON.
Activate the suspect station.
Ensure that the diagnostic code is active. Expected Result:The diagnostic code is active.Results:
OK - The diagnostic code is active. Go to Test Step 2.
NOT OK - The diagnostic code is NOT active.STOPTest Step 2. CHECK ELECTRICAL CONNECTORS AND WIRING.
Turn the keyswitch OFF.
Inspect the wiring from the "control station processor" (CSP) to the slim line control head or the side mount control head for the following conditions:
Abrasion
Corrosion
Incorrect attachment
Pinch points
Ensure that the following items are correctly mated and are in good condition: connectors, pins and sockets. Expected Result:All of the following are properly mated and in good condition: connectors, pins, and wires are properly mated and in good condition.Results:
OK - All connectors, pins, and wires are properly mated and in good condition. Go to Test Step 3.
NOT OK - All connectors, pins, and wires are NOT properly mated and in good condition.Repair: Repair the parts or replace the parts.STOPTest Step 3. CHECK THE OPERATION OF THE SLIM LINE CONTROL HEAD OR THE SIDEMOUNT CONTROL HEAD.
Disconnect the cable between the "control station processor" and the slim line control head or the side mount control head.
Illustration 1 g01030024
Insert a 12-pin breakout T between the "control station processor" and the processor for the slim line control head or the side mount control head. Refer to illustration 1.
Use a digital volt meter (DVM) in order to verify the operation of the slim line control head or the side mount control head. Refer to table 1.
Table 1
Measure from
Pin Number Measure to
Pin Number Minimum Maximum
5 (forward gear) 8 (return) 0.0 VDC 2.5 VDC(1)
6 (idle) 8 (return) 0.6 VDC 2.5 VDC(2)
7 (reverse) 8 (return) 0.0 VDC 2.5 VDC(3)
(1) The voltage should be between 0 VDC and 2.5 VDC when the gear lever is in the AHEAD position.
(2) The voltage should be between 0 VDC and 2.5 VDC when the gear lever is the IDLE position.
(3) The voltage should be between 0 VDC and 2.5 VDC when the gear lever is the ASTERN position.Expected Result:The voltages are