LEVER 4D4895 - Caterpillar

Table 1
Diagnostic Codes
J1939 CDL Description Comments
107-3 582-3 Engine Air Filter 1 Differential Pressure : Voltage Above Normal This code indicates a fault in the circuit for the air filter restriction switch.
The air filter restriction circuit is open or shorted for at least 1 second while the engine is not running. The open or short circuit depends on the configuration of the switch. Tables 2 and 3 contains the normal engine conditions and switch states for the air filter restrictions switch.
Table 2
Normally Open Air Filter Restriction Switch
Engine Condition Switch State
Not running Open
Running Closed
Table 3
Normally Closed Air Filter Restriction Switch
Engine Condition Switch State
Not running Closed
Running Open
Table 4
Troubleshooting Test Steps Values Results
1. Check the "Air Filter Restriction Switch Configuration".
A. Turn the keyswitch to ON.
B. Connect to Cat® Electronic Technician (ET).
C. Under "Configuration Parameters" check the "Air Filter Restriction Switch Configuration".
Air Filter Restriction Switch Configuration
Results : The switch is configured to "Normally Open".
Proceed to Test Step 2.
Results : The switch is configured to "Normally Closed".
Proceed to Test Step 3.
2. Check the Air Filter Restriction Switch
A. Turn the keyswitch to OFF.
B. Disconnect the air filter restriction switch from the wiring harness connector.
C. Turn the keyswitch to ON.
D. Monitor Cat ET for active fault codes.
Diagnostic codes
Results : There is not an active 107-3 or 582-3 fault code. A failed air filter restriction switch has been detected.
Repair : Replace the air filter restriction switch.
Verify that the repairs eliminated the issue. Return the machine to service.
Results : There is an active 107-3 or 582-3 fault code. A short circuit in the wiring harness has been detected.
Repair : Repair or replace the wiring harness.
Verify that the repairs eliminated the issue.
3. Check the Air Filter Restriction Switch
A. Turn the keyswitch to OFF.
B. Disconnect the air filter restriction switch from the wiring harness connector.
C. Install a jumper wire in the wiring harness connector between the signal and ground wires.
D. Turn the keyswitch to ON.
E. Monitor Cat ET for active fault codes.
Diagnostic codes
Results : There is not an active 107-3 or 582-3 fault code. A failed air filter restriction switch has been detected.
Repair : Replace the air filter restriction switch.
Verify that the repairs eliminated the issue. Return the machine to service.
Results : There is an active 107-3 or 582-3 fault code. An open circuit in the wiring harness has been detected.
Repair : Repair or replace the wiring harness.
Verify that the repairs eliminated the issue.