HOUSING 1T0778 - Caterpillar

Schematic for ET Jumper Harness
A jumper harness can be created to check fault codes with the ET Tool (2013B v1.0 and up) on certain CARM suspensions. Any suspension built after April 23, 2013 and/or with a serial number later than 19041346104 will be compatible with the ET Tool. The jumper consists of four wires, two connectors, and a resistor. See schematic below
Illustration 1 g03710817
(A) Twisted PairNote: To connect to the suspension through CAT ET, use the WINFLASH screen by powering on the suspension when it is searching for J1939 compatibility.
Illustration 2 g03499096ET Fault Codes
Note: Using ET Tool (2013B v1.0 and up) and jumper described above
Table 2
Display Pop Up Text - First Line Display Pop Up Text - Second Line Expected Fault Code Possible Secondary Fault Code Component Failure Mode Identifier / Description Warning Level ECM Action on Fault
Seat Shock Absorber Fault J520705-2 Valve Position Sensor Data Erratic 2 Disable Voice Coil / Maximum Damping
J520707-2 Thermistor Data Erratic 2 Disable Voice Coil / Maximum Damping
J520707-5 J520713-5 Current Below Normal/Open Circuit 2 Disable Voice Coil / Maximum Damping
520707-6 J520707-2
J521728-15 Current Above Normal 2 Disable Voice Coil / Maximum Damping
J520713-5 Voice Coil Current Below Normal/Open Circuit None
J520713-6 J520713-5 Current Above Normal 2 Disable Voice Coil / Maximum Damping
520716-2 Voice Coil Current Sensor Data Erratic 2 Disable Voice Coil / Maximum Damping
520716-6 Current Above Normal 2 Disable Voice Coil / Maximum Damping
520721-3 Voice Coil Voltage Sensor Voltage Above Normal 2 Disable Voice Coil / Maximum Damping
J521728-15 Seat Shock Absorber High Temperature 1 Reduce Max Voice Coil Current
Seat Sensor Power Supply Fault J520708-3 J520709-2
J521217-21
J520705-2
J521761- Sensor Power Supply Voltage Above Normal 2 Disable Voice Coil / Maximum Damping
J520708-6 Current Above Normal 2 Disable Voice Coil / Maximum Damping
Seat Position Sensor Fault J520709-2 J520713-5
J521761-31 Seat Position Sensor Data Erratic 2 Disable Voice Coil / Maximum Damping
Out of Ride Zone Adjust Seat Height J521761-31 Out of Ride Zone 1 None
Seat Air Pressure Sensor Fault J521217-21 Seat Air Pressure Sensor Data Drifted Low 2 None
J521217-20 Data Drifted High 2 None
Seat System Voltage Fault 521219-3 System Voltage Voltage Above Normal 2 None
Seat Controller Fault 520457-12 Seat Controller Bad Device or Component 2 Disable Voice Coil / Maximum Damping