2002 Explorer Power Window System Diagnosis

2002 Ford Truck Explorer 4WD V6-4.0L VIN E

Copyright © 2008, ALLDATA

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Windows: Testing and Inspection Principles of Operation RINCIPLES OF OPERATION GEM Controlled Systems Vehicles manufactured in the first part of 2002 use a GEM to control the power supply to the rear defrost grid and power window system. These vehicles will be referred to as "early build". ICM Controlled Systems Vehicles manufactured later in 2002 use the instrument cluster module (ICM) to control the power supply to the rear defrost grid and power window system. These vehicles will be referred to as "late build". ower Window Operation The power window system operates under the control of the accessory delay relay. For early build vehicles, the GEM will energize the relay to provide power to the power window system. For late build vehicles, the ICM will energize the relay to provide power to the power window system. ower Window Control The power window system can be operated from the left front or from the power window switch located on each door panel. The left front (master) power window switch has two modes of operation for the left front power window, manual and auto. All other windows operate in the manual mode only. Manual mode will move the window downward until the switch is released. The left front power window will operate in the manual mode when the left front power window switch is pressed to the first detent position. Auto mode provides the one-touch down (OTD) feature for the left front power window. The OTD function allows the left front power window to be completely lowered when the master window adjust switch is pressed to the second detent position and then released. The power window system will only operate if: - The igniti ignition on is is in the RUN or ACC ACC posi positio tion n or - The acce accesso ssory ry delay delay featur featuree is in in the active active mode mode.. ccessory Delay Power For early build vehicles, the GEM controls the accessory delay feature and power supply to the power windows through the accessory delay relay. For late build vehicles, the ICM controls the accessory delay feature and power supply to the power windows through the accessory delay relay. The relay is activated by applying a ground signal directly to one side of the coil and deactivated by removing the signal. eated Backlite and Mirror Timer For early build vehicles, when the rear window defrost switch is pressed, a 10 minute timer is started and the GEM energizes the heated backlite relay to provide battery voltage to the heated backlite grid and heated outside rear view mirror (if equipped). For late build vehicles, when the rear window defrost switch is pressed, a 10 minute timer is started and the ICM energizes the heated backlite relay to provide battery voltage to the heated backlite grid and heated outside rear view mirror (if equipped).The rear window grid wires heat up to defrost the rear window or melt accumulated snow or ice. EM Controlled Functions The Generic Electronic Module (GEM) is used in early build vehicles. It receives input information and performs an output to a majority of electronically controlled features features of the vehicle. The GEM constantly monitors these systems and reports a concern in the form of a Diagnostic Trouble Code (DTC). The DTC can be retrieved with a diagnostic tool through the vehicle Data Link Connector (DLC). The GEM control system has two modes of operation, the normal operating mode and tester-dependent diagnostics mode. The normal operating mode of the GEM detect errors and changes the GEM control strategy. There is no w arning lamp for the GEM; therefore, a DTC concern w ill direct you to the GEM diagnostic procedures. The GEM can only detect open circuit/short to GND faults when energizing a load, and short to battery faults when attempting to energize a load. CM Controlled Functions The instrument cluster module (ICM) is used in late build vehicles. It controls the rear window defrost grid and heated mirrors (if equipped) by controlling the state of the rear window defrost/mirror relay. When the rear window defrost switch is pressed, the ICM will activate the heated grid relay. When the heated grid relay is active, both the rear window defrost grid and heated mirror elements will be energized. The ICM will deactivate the heated grid relay when one of the following conditions is met: - The rear rear window window defrost defrost switch switch is pressed pressed when the the feature feature is active. active. - Igniti Ignition on switch switch stat statee is chang changed ed from from RUN RUN to OFF/LO OFF/LOCK. CK. - The 10 minute timing function is completed. Feature inputs:

2002 Ford Truck Explorer 4WD V6-4.0L VIN E -


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Igni Igniti tion on swit switch ch RUN RUN pos posit itio ion n (12V (12V on both RUN and RUN/ACC inputs) Rear window window defrost defrost switch switch (momentar (momentary y contact contact to ground ground when when the switch switch is pressed pressed))

Feature outputs: - Rear window window defrost defrost relay relay control control (grounde (grounded d when activate activated, d, open circuit circuit when when deactivat deactivated) ed)

Inspection and Verification INSPECTION AND VERIFICATION 1. Verify a power window or rear window defrost system concern concern by operating operating the system in question. 2. Visually Visually inspect inspect for obvious obvious signs signs of mechanical mechanical and and electrical electrical damage. damage.

Visual Inspection Chart 3. Inspect Inspect the central central and and battery battery junction junction box box for blown blown fuses. fuses. 4. If the concern remains remains after the inspection, inspection, connect the diagnostic diagnostic tool to the DLC located located beneath the instrument instrument panel and select the vehicle to be tested from the diagnostic tool menu. If the diagnostic tool does not communicate with the vehicle: - check check that that the the progra program m card card is corre correctl ctly y instal installed led.. - chec check k the the conn connec ecti tion onss to the the veh vehic icle le.. - chec check k the the igni igniti tion on swi switc tch h posi positi tion on.. 5. Perform Perform the DATA DATA LINK DIAGNOSTIC DIAGNOSTIC TEST. TEST. If the diagnost diagnostic ic tool respon responds ds with: - SCP +, SCP - or UBP UBP circuits circuits fault fault = ALL ECUS NO RESP/NOT RESP/NOT EQUIP, EQUIP, refer refer to Informati Information on Bus (Module (Module Communic Communicatio ations ns Network). Network). - NO RESP/NOT RESP/NOT EQUIP for for GEM, refer refer to Body Control Control System Systemss (Multifunc (Multifunction tion Electro Electronic nic Control Control Module). Module). - NO RESP/NOT RESP/NOT EQUIP EQUIP for ICM, ICM, refer refer to Instrum Instrument ent Panel, Panel, Gauges Gauges and and Warning Warning Indicator Indicators. s. - SYSTEM PASSED, PASSED, retrieve retrieve and record record the continu continuous ous diagnosti diagnosticc trouble trouble codes (DTCs), (DTCs), erase erase the continuous continuous DTCs DTCs and carry out the the self-test diagnostics for the GEM. 6. If the DTCs retrieved are related to the concern, go to the GEM/CTM or ICM Diagnostic Trouble Code (DTC) Index to continue continue diagnostics. See: Trouble Code Descriptions 7. If no DTCs related to the concern are retrieved, GO to Symptom Chart to continue diagnostics. diagnostics. See: Diagnosis By Symptom



B1302-B1349

Test A: All Power Windows Are Inoperative INPOINT TEST A: ALL POWER WINDOWS ARE INOPERATIVE

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A6 CAUTION: - Electronic Electronic modules modules are are sensitive sensitive to electrost electrostatic atic discharg discharges. es. If exposed exposed to these these charges, charges, damage can can result. result. - Disconnect Disconnect the battery battery before before removing removing and installing installing the generic generic electronic electronic module module (GEM) (GEM) or its connectors. connectors. Failure Failure to follow this this caution will result in the GEM storing many erroneous DTCs and possibly exhibiting erratic operation after installation. - Disconnect Disconnect the battery battery before before removing removing and installing installing the instrument instrument cluster cluster module module (ICM) or its connector connectors. s. Failure Failure to follow this this caution will result in the ICM storing many erroneous DTCs and possibly exhibiting erratic operation after installation. - Be careful careful when probing probing the I/P fuse panel, panel, power distribut distribution ion box or any connectors. connectors. Damage Damage will result result to the connector connector receptacle receptacle if the probe or terminal being used is too large. OTE: - If continuous diagnostic trouble trouble codes (DTCs) are recorded and the symptom is not present when carrying out the pinpoint tests, an intermittent concern may be the cause. Always check for loose connections and corroded terminals. - Complete Complete the entire entire pinpoi pinpoint nt test relate related d to the symptom symptom before before instal installing ling a new new GEM or ICM.

Test B: Single Power Window Is Inoperative - Driver Side Front Power Window INPOINT TEST B: SINGLE POWER WINDOW IS INOPERATIVE - DRIVER SIDE FRONT POWER WINDOW



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B5

Test C: Single Power Window Is Inoperative - Passenger Side Front Power Window INPOINT TEST C: SINGLE POWER WINDOW IS INOPERATIVE - PASSENGER SIDE FRONT POWER WINDOW



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Test D: Single Power Window Is Inoperative - Left Rear Power Window INPOINT TEST D: SINGLE POWER WINDOW IS INOPERATIVE - LEFT REAR POWER WINDOW



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D5

Test E: Single Power Window Is Inoperative - Right Rear Power Window INPOINT TEST E: SINGLE POWER WINDOW IS INOPERATIVE - RIGHT REAR POWER WINDOW



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E2

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E5

Test F: The Back Window Defroster Will Not Defrost INPOINT TEST F: THE BACK WINDOW DEFROSTER WILL NOT DEFROST

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F12-F13

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F16 Continued

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F16 Continued

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F19

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F20-F21

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F22

Test G: The Back Window Defroster Will Not Shut Off Automatically INPOINT TEST G: THE BACK WINDOW DEFROSTER WILL NOT SHUT OFF AUTOMATICALLY



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G3

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G7

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Symptom Chart (Part 1)

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Symptom Chart (Part 2)

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2002 Explorer Power Window System Diagnosis

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