Ford FCSD TECHNICAL TRAINING FCS-14000-DL User Manual download pdf (Page 34)

LESSON 2: CHASSIS

Possible Failure Modes and Root Causes

•

TPMS indicator light stays ON continuously. Message center (if equipped) Displays: ‘‘Low Tire Pressure’’.

– Causes:

1. Air pressure is low or not set to required placard pressure.

2. Spare tire currently in use.

– Solution:

1. Check tire pressure with digital gauge. If issue still persists, then retrieve DTC and follow pin point test

F2 described in service manual.

2. Repair original tire and install road wheel/tire.

•

TPMS indicator light Flashes for approx. 20 sec. At key ON position. Message center (if equipped) Displays:

‘‘Tire Pressure Sensor Fault’’.

– Causes:

1. TPMS sensors failed, missing sensor, after market wheels or sensor incorrectly trained.

2. Vehicle may have sat stationary for 10 or more days. This will not always happen, but in some cases, if

vehicle is parked and is stationary for 10 or more days, you may see this event.

– Solution:

1. Train TPMS sensors. If issue still persists then retrieve DTC and follow pin point test C described in

Workshop Manual.

2. Drive vehicle for 5 minutes and cycle the ignition key to the RUN position. Verify the fault is gone and

clear the DTC.

•

TPMS indicator light Flashes for approx. 20 sec. At key ON position. Message center (if equipped) Displays:

‘‘Tire Pressure Monitor Fault’’.

– Causes:

1. Module failure.

2. All four TPMS sensors have failed, are missing or are incorrectly trained.

3. No MS-CAN communication.

– Solution:

1. Refer to pin point test C described in the Workshop Manual.

2. Train the TPMS sensors. If training cannot be completed, you may have the wrong sensors (MY 04

Black 433 MHz sensors), or you’re missing all sensors.

3. Refer to Workshop Manual for communication issues.

NOTE: Always refer to the Workshop Manual for complete diagnostic information.

2005 Expedition/Navigator New Model Technician Training02-SEP-042-10

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Ford FCSD TECHNICAL TRAINING FCS-14000-DL User Manual Page 34