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Home >> Lincoln >> 2009 >> MKX FWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 1093 (Body Panel System - Body Closures) >> Diagnostic Tests >> Power Liftgate >> Pinpoint Tests >> Pinpoint Test A: The Power Liftgate is Inoperative - Does Not Open or Close >> Normal Operation

Normal Operation

WARNING: This page is about a different car, the 2007 Lincoln MKX and 2007 Ford Edge. However, it is still accessible from the selected car via links, so may be relevant.

If the power liftgate is operated from the power liftgate control switch (instrument panel), circuit CPR63 (GY/YE) is grounded by the open/close switch, which signals the liftgate/trunk module (LTM) of the open/close request.

If the power liftgate is in the closed position and the conditions are correct, the LTM supplies 12 volts to the unlatch/cinching motor on circuit CPR62 (WH/BU), 12 volts to the clutch on circuit CPR69 (BN/BU) and 12 volts to the motor on circuit CPR57 (GN/WH). As the liftgate is moving in the open direction, the LTM monitors the position sensor for door speed to detect obstacles.

If the power liftgate is in the open position and the conditions are correct, the LTM supplies 12 volts to the clutch on circuit CPR69 (BN/BU) and 12 volts to the motor on circuit CPR58 (GN/OG). As the liftgate is moving in the close direction, the LTM monitors the position sensor for door speed to detect obstacles.

DTC Description Fault Trigger Conditions
  • B106E - Solid state driver disabled due to short circuit
 		 When the FET driver was shorted to ground, array counter reaches 1/3 or 2/3 of maximum times, which is 240.
  • B106F - Module disabled due to external fault
 		 When the FET driver was shorted to ground, array counter reaches the maximum counts, which is 240.
  • B117A - Latch motor circuit short to ground
 		 The ratio of diagnostic feedback voltage (VFB) and switch battery voltage (VBS) is less than 0.088 for more than one second (for example, VFB/VBS less than 0.088).
  • B117B - Latch motor circuit open
 		 Feedback current does not change during powered releasing/cinching.
  • B1179 - Latch motor circuit short to battery
 		 The ratio of VFB and VBS is greater than 0.3 for more than one second (for example, VFB/VBS greater than 0.3).
  • B2418 - Sensor power short to ground
 		 Feedback sensor power is less than 0.5 V for more than 3 seconds.
  • B2419 - Sensor 1 invalid
 		 Sensor signals are not in correct phase.
  • B2420 - Sensor 2 invalid
 		 Sensor signals are not in correct phase.
  • B2552 - Vbatt2 circuit open
 		 Vbatt2 is less than 4 VDC when Vbatt1 (logic) greater than 8 VDC.
  • B2819 - Gate motor circuit short to battery
 		 Ratio of diagnostic feedback voltage/VBS is greater than 0.3 for more than one second.
  • B2908 - Latch switch invalid
 		 Switch signals are invalid at start of self-test or no signal transitions during releasing/cinching.
  • B2935 - Drive unit failure
 		 Self-test exceeded the maximum test time as specified in the self-test sheet.
  • B2936 - Gate motor open
 		 Power liftgate motor feedback current does not change when pulse-width modulation (PWM) duty cycle reaches 60%.
  • B2937 - Gate motor short to ground
 		 Ratio of diagnostic feedback voltage/VBS is less than 0.088 for more than one second.
  • B2939 - Gate clutch short to ground or open
 		 Diagnostic feedback indicates a short or open circuit for more than 120ms.

This pinpoint test is intended to diagnose the following:

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