FA470 is detecting failure on Power Folding, how to troubleshoot the condition to locate the root cause
The MirrorEye system features a Power Folding function that retracts or extends both wings using the joystick's upper-center button.
The Extended Mode is the default configuration and is primarily used during normal operation. It should be set to this position during installation, when the ignition key is turned on and also when the vehicle is traveling at city or highway speeds.
The Retracted Mode is used for specific situations, such as parking in tight spaces where side clearance is limited.
In case of problems with Power Folding related feature, follow the steps below:
- Mandatory tools
- Multimeter: will be used to measure the electrical properties like continuity function, output voltage (V) and resistance (Ω).
- Multimeter: will be used to measure the electrical properties like continuity function, output voltage (V) and resistance (Ω).
- Related connectors
- Main harness "ECU" connector
Related pinout table:
Pin Color Description Related Part Meaning 7 Yellow PF_RS_H Passenger Side Power Fold + 12v Power Supply to Passenger Side 8 White PF_RS_L Passenger Side Power Fold - GND to Passenger Side 9 Yellow PF_LS_H Driver Side Power Fold + 12v Power Supply to Driver Side 10 White PF_LS_L Driver Side Power Fold - GND to Driver Side
Pin numbering order:
- Main Harness 8-Pins Wing connector ("Driver Side Wing" and "Passenger Side Wing")
Related pinout table:
Pin Color Description Related Part Meaning 1 Red IR_LS_H
IR_RS_HFlood IR 12V Power Supply 2 Black IR_LS_L
IR_RS_L
Flood IR GND 3 Yellow PF_LS_H
PF_RS_H
Power Folder + 12V Power Supply 4 White PF_LS_L
PF_RS_L
Power Folder - GND 5 Orange WPS_LS_H
WPS_RS_H
Positioning Sensor + 12V Power Supply 6 Orange WPS_LS_L
WPS_RS_L
Positioning Sensor - GND 7 Green PF_FR_H
Focused IR + 12V Power Supply 8 Black PF_FR_L
Focused IR - GND Pin numbering order:
- Wing 8-Pins connector ("Driver Side Wing" and "Passenger Side Wing")
- Main harness "ECU" connector
Related pinout table:
| Pin | Color | Description | Related Part | Meaning |
| 1 | Red |
IR_LS_H |
Flood IR | 12V Power Supply |
| 2 | Black |
IR_LS_L IR_RS_L |
Flood IR | GND |
| 3 | Yellow |
PF_LS_H PF_RS_H |
Power Folder + | 12V Power Supply |
| 4 | White |
PF_LS_L PF_RS_L |
Power Folder - | GND |
| 5 | Orange |
WPS_LS_H WPS_RS_H |
Positioning Sensor + | 12V Power Supply |
| 6 | Orange |
WPS_LS_L WPS_RS_L |
Positioning Sensor - | GND |
| 7 | Green |
PF_FR_H |
Focused IR + | 12V Power Supply |
| 8 | Black |
PF_FR_L |
Focused IR - | GND |
Pin numbering order:
- Identify the side with the problem
- If you have the Power Folder problem with only 1 side of the wing (Driver or Passenger side), filter the available tests below to only the side of your interest.
- If you have the Power Folder problem with both sides, perform all tests below.
3. Internal CAN Verification test
| Step | Description |
| a |
Turn on the truck using the ignition key and wait 20 seconds until the MKII system starts properly.
Checking if the system started properly: 1- image top and bottom from driver side monitor should be split with a bar in the middle of the frames
2-distance lines must be appearing on top side image on both monitors
|
| b |
Access the Driver Menu pressing & holding the Left Manual Pan Button for 3-5 seconds
|
| c |
The menu should appear on the driver’s monitor. Rotate the center dial and press the MirrorEye center knob click to access the "Status" menu.
|
| d |
The Internal CAN Status should be "Detected"
|
| e |
If Driver Menu is not accessible, then we should troubleshoot the MirrorEye connection to Internal CAN or the Joystick before continuing. refer to additional article for this process: How to Troubleshoot Controller / Internal CAN in MirrorEye MKII |
4. Main harness "Continuity" test for Open-Circuit issues
Warning
Before performing the steps below, ensure that the electrical circuit you are testing has no power.
If the truck is on, turn it off and turn master battery switch off, making sure there is no power coming from the battery.
| Step | Description |
| a |
Set the multimeter to Continuity Test mode (Ω).
|
| b |
Insert one probe into the "8-pin wing" connector and the another into the "ECU" connector, following these combinations and test one pair combination at a time: Power Folding Harness Continuity:
|
| c | If the multimeter beeps in each step above, a complete path (continuity) has been detected.
If the circuit is open, the multimeter will not beep.
If test results have no continuity on step 1 and 2 above, means an open circuit on the main harness, so it must be replaced.
If test results have no continuity on step 3 above, means an open circuit on the wing, so it must be replaced.
|
5. Main harness & Wing "Continuity" test for Short-Circuit issues
Warning
Before performing the steps below, ensure that the electrical circuit you are testing has no power.
If the truck is on, turn it off and turn master battery switch off, making sure there is no power coming from the battery.
| Step | Description |
| a |
Set the multimeter to Continuity Test mode (Ω).
|
| b |
Insert one probe into the "8-pin wing" connector and the another into the "ECU" connector, following these combinations and test one pair combination at a time:
|
6. Results and conclusion
Release 12/20/2024 Revision 1/7/2025