FILTER AS-FUEL 3685934 - Caterpillar

Illustration 1 g00743412
Schematic of the shift lever position sensor
This diagnostic code is associated with the shift lever position sensor. This diagnostic code is recorded when the Power Train/Chassis Electronic Control Module (ECM) reads erratic data from the shift lever position sensor.The possible causes of this diagnostic code are listed:
A shorted harness or an open harness
The sensor has failed.
The ECM has failed.Note: The following test procedure may create other diagnostic codes. Ignore these diagnostic codes and clear the diagnostic codes when the original diagnostic code has been corrected. Ensure that the diagnostic code of CID 0702 FMI 02 is active before performing this procedure.System Response:The sensor is unavailable. The lockup clutch is forced to the off position and the machine will not shift. After the diagnostic code has been corrected, the machine will shift normally. The transmission will return to the gear that is currently selected by the position of the shift lever, and the transmission output speed.Test Step 1. CHECK THE BATTERY VOLTAGE.
Turn the battery disconnect switch and the key start switch to the ON position.
At the connector for the sensor, measure the voltage from contact 6 to frame ground. Expected Result:The voltage should be approximately +battery.Results:
OK - The voltage that is measured is approximately +battery. Proceed to Test Step 2.
NOT OK - The voltage that is measured is not approximately +battery.Repair: Repair the harness or replace the harness. Verify that the repair corrects the problem.STOPTest Step 2. CHECK THE GROUND CIRCUIT.
The key start switch and the battery disconnect switch remain in the OFF position.
At the connector for the sensor, measure the resistance from contact 2 to frame ground. Expected Result:The resistance should be less than 5 ohms.Results:
OK - The resistance is less than 5 ohms. Proceed to test step 3.
NOT OK - The resistance is greater than 5 ohms.Repair: There is an open in the ground circuit. Repair the harness or replace the harness. Verify that the repair corrects the problem.STOPTest Step 3. CHECK THE HARNESS.
Turn the key start switch and the battery disconnect switch to the OFF position.
Disconnect the sensor from the machine harness.
Turn the battery disconnect switch and the key start switch to the ON position.
Place the monitor in Submode 7.1 “Shift Lever”.
At the sensor, use a jumper wire to briefly connect the following contacts of the sensor to frame ground. As each contact is briefly connected to the frame ground, the position of the shift lever is displayed on the left side of the display when ground is applied to the contact. Observe the status on the display of the monitor. See the following table.
Table 1
Position of the Shift Lever On The Display ECM Connection Sensor Contact
1 J1-14 3
2 J1-24 4
3 J1-35 5
4 J1-19 8
5 J1-27 9 Expected Result:The display shows the correct indication for each contact.Results:
OK - The display shows the correct indication