Purpose: Test, Diagnose, and repair the Positive Service Verification (PSV) system.
Details: Positive Service Verification (PSV) utilizes an inclinometer (Figure 1.2) or by using the Heil J1939 network messages if the Heil unit is compatible (model year dependent).
Issue: PSV is reported as “FAIL[ ]”
Diagnose:
If an inclinometer is installed on the truck, located on the curb side arm at the pivot point (Figure 1.2) proceed to Step 1. If your unit is a 2013 or newer Heil FEL it will not have an inclinometer, therefore proceed to Step 5.
Step 1 TEST: HAVE THE UNIT IN A LOCATION THAT IS SAFE FOR ARM OPERATION. Test the functionality of the PSV system by starting the truck and allowing the 3rd Eye Gateway to boot up (usually within 1-2 minutes). The window unit lights will illuminate when this process is complete. Lower the arms to the fully down position, then while raising the arms to the fully raised position, watch the window unit for the momentary activation of the RED light (Figure 1.1). If the RED light flashes then the PSV system is working correctly.
If the RED light does not activate upon raising the arms, stow the arms in the fully up position and shut down the truck. After the engine stops return the ignition switch to the on position so you can test for power and proceed to Step 2.
 |
 |
Figure 1.1 Figure 1.2
Step 2: Locate the inclinometer on the curb side arm and inspect the wiring coming out of the inclinometer, around the hydraulic hoses, and into the front of the body. If any of the wires are damaged, repair the affected wires and retest the PSV system. If no damage exists, unplug the 3-pin connector and test 12V+ in pin C and ground in pin A on the harness connector with a volt meter (Figure 2.1). If either of the readings are missing, proceed to Step 3. If both readings are present, provide 12V+ to pin B utilizing a jumper wire while someone is watching the window unit for activation of the RED light when the signal is provided (Figure 2.2). If the RED light activates, the inclinometer has failed. Replace the inclinometer with the correct part number listed in the Parts List below. NOTE: The chances of the inclinometer failing are very low, typically there is damage in the wiring around the hydraulic hoses. If the inclinometer is replaced and re-connected, retest the PSV system. If the Red light does not activate, proceed to Step 3.
 |
 |
Figure 2.1 Figure 2.2
Step 3: Perform the lockout/tagout procedure before proceeding. The 12V+, ground, or signal wire could be damaged or disconnected somewhere along the harness, which also could have blown the in-cab fuse. Inspect the harness working from the inclinometer back towards the cab to the entry point. If damage or disconnect is found, repair it and replace the in-cab fuse for the inclinometer harness that connects to the Gateway. Retest the PSV system. If no damage is found or the PSV system fails the retest after the repair, proceed to Step 4.
Step 4: Locate the relay in the 3EC-WHITECASTLE3 harness near the 3rd Eye Gateway and provide a 12V+ signal to the orange “event” wire. If the red light does not activate, change the relay and retest. If there is still no activation follow the green and white wires from the relay to the 2-pin VIDEO connector (Figure 2.3), unplug it and use a jumper wire to connect the wires inside the VIDEO connector on the Gateway side while watching for the RED light on the window unit. If there is still no activation contact 3rd Eye technical support (information at the bottom of this document).
Figure 2.3
Step 5. THIS STEP ONLY APPLIED TO HEIL FEL 2013 OR NEWER.
The PSV signal on Heil units 2013 and newer is received via the J1939 network. The most common cause of this failure is disconnection from the network, or a terminating resistor has been removed. To test the network, unplug the 3rd Eye Gateway J1939 connector from the splitter harness and test the network side of the connection point with a volt meter set to OHM. There should be 60 Ohms between the yellow and green wires. If the measurement is around 45, there is an extra resistor installed on the network. If the measurement is around 120 Ohms, there is a resistor missing from the network. On Heil units 2013 to 2018, connection to the network can be made at the CAN2A connector or the SCALE connector on the Heil cab harnessing, whichever is available. On 2018 and newer units (identifiable with the integrated Heil IN-SIGHT display), connection should be made at the blue 3EC connector on the Heil cab harnessing (Figure 3.1). If all connections and resistance measurements are correct, and the PSV system still doesn’t work contact 3rd Eye technical support (information at the bottom of this document). For more information on the J1939 network and connection, refer to the “J1939 Troubleshooting Guide” document.