Installation Instructions

Prior to connecting the DEF Sensor Simulator to you motorhome, you need to unplug the DEF Head from the engine harness.  This must be done with the ignition turned off.  You will likely need to cut a few zip ties for better access to the connector and to provide some additional accessibility to the wires.

Plug the simulator into the connection to your chassis wiring where the def head was plugged in.

Turn on your ignition, some or all of the fault codes should go away and the Check Engine and MIL (Malfunction Indicator Lamp) lights should extinguish within a few minutes.

If some codes remain, to clear your codes you will need to turn your ignition on (let all systems come up, about 20 seconds), then start your engine and fast idle for 5-6 minutes, shut down for 90 seconds, turn ignition on (wait for systems to boot 20 sec) start engine and fast idle for 5 min. You will do this a total of 3 times on the 4 cycle the codes should clear to the inactive status.

Note: on older engines or engines with older ECM software, some codes may not completely clear on their own. In this case code clearing intervention may be required.