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Diagnosis and Testing|Removal and Installation > < Generic Electronic Module (GEM) - Vehicles Built Up To: 10-2005

Fusion 2002.75 (06.2002-)

Multifunction Electronic Modules - Generic Electronic Module (GEM)—Vehicles Built From: 10/2005 Fusion 2002.75 (06/2002-)
Diagnosis and Testing

Special Tool(s)

Terminal Probe Kit

418-S035
General Equipment
Digital multimeter
The Ford approved diagnostic tool

Description of operation

A diagnosis of the generic electronic module (GEM) can be performed with the Ford approved diagnostic tool. Furthermore, an integrated service mode enables testing of the input and output signals without the need for further tools. To enable activation of service mode:

  • switch off the ignition,
  • switch off all other electrical consumers,
  • apply the handbrake,
  • shift to neutral
  • and close the doors.

Activating the service mode

Proceed as follows to activate the service mode:

  • OPERATE the switch of the heated rear window and HOLD IT THERE
  • Turn on the ignition.
  • RELEASE the switch of the heated rear window
  • PRESS the heated rear window switch 8 times within 6 seconds

A signal sounds and the turn signal lamps flash to indicate that service mode has been successfully activated.

NOTE:
NOTE:If the alarm has been triggered (in vehicles equipped with an anti-theft alarm system), service mode cannot be activated.

Input signals

SWITCH the wiper switch to the "Off" position to test the input signals. The following is a list of the signals to be tested, in no particular order:

  • Turn signals (right, left, hazard warning lights)
  • "Lights on" warning (terminal 58)
  • Windshield wiper (intermittent wipe)
  • Windshield washer system
  • Rear window wiper
  • Rear window washer system
  • Doors open/closed
  • Central locking (if fitted)
  • Hood open/closed (in vehicles equipped with an anti-theft alarm system)
  • Heated rear window
  • Heated windscreen (if fitted)

An acoustic signal sounds and the turn signal lamps flash to indicate receipt of each input signal by the generic electronic module.

Output signals

SWITCH the wiper switch to the "Intermittent" position to test the output signals. PRESSING the heated rear window switch activates or deactivates the output signals in the following order:

  • Windshield wipers (a signal sounds and the direction indicator lamps flash when the "Park" position is reached)
  • Heated rear window
  • Interior light(s) (the interior light switch must be in the "ON" position)
  • Rear window wiper
  • heated windshield (if fitted, is only activated when engine is running)

If the heated rear window switch is operated again, the sequence restarts with point 'a' and the functions are activated again in this order.

Ending the service mode

The GEM automatically ends service mode 20 seconds after the last input. However, service mode can be manually ended at any time by proceeding as follows:

  • OPERATE the switch of the heated rear window and HOLD IT THERE
  • SWITCH OFF the ignition
  • RELEASE the switch of the heated rear window

3 signals sound and the turn signal lamps illuminate to indicate that service mode has ended.

Inspection and Testing

  1. VERIFY the customer concern.
  1. Visually CHECK for any obvious mechanical or electrical damage.
NOTE:
NOTE:Ensure correct locking of wiring harness connector.

Visual Inspection

Electrical
Fuses.
Wiring harness.
Electrical connectors.
  1. RECTIFY any obvious causes for a concern found during the visual inspection before performing any further tests. CHECK the operation of the system.
  1. If the concern persists after the visual inspection, PERFORM a fault diagnosis with the Ford approved diagnostic tool and RECTIFY any displayed faults in accordance with the displayed fault description. CHECK the operation of the system.
  1. For vehicles with no stored faults, PROCEED in accordance with the Symptom Chart and the corresponding fault symptom.
  1. Following checking or elimination of the fault and after completion of operations, the fault memories of all vehicle modules must be READ OUT and any stored faults must be DELETED. READ OUT all fault memories again following a road test.

Fault Code Table

DTC: Description Action
B2496 Circuit of anti-theft alarm horn faulty (short to ground). REFER to: Anti-Theft - Active (419-01A Anti-Theft - Active, Diagnosis and Testing).
B2494 Circuit of anti-theft alarm horn faulty (short to voltage). REFER to: Anti-Theft - Active (419-01A Anti-Theft - Active, Diagnosis and Testing).
B1300 Circuit of central locking switch faulty. REFER to: Locks, Latches and Entry Systems (501-14 Handles, Locks, Latches and Entry Systems, Diagnosis and Testing).
B1310 Circuit of door lock release switch faulty. REFER to: Locks, Latches and Entry Systems (501-14 Handles, Locks, Latches and Entry Systems, Diagnosis and Testing).
B1317 Battery voltage too high (more than 16.5 V). REFER to: Charging System (414-00 Charging System - General Information, Diagnosis and Testing).
B1318 Battery voltage too low (less than 7.5 V). REFER to: Charging System (414-00 Charging System - General Information, Diagnosis and Testing).
B1319 Circuit of driver side door contact switch faulty (open circuit). REFER to: Interior Lighting - Vehicles Built Up To: 10/2005 (417-02 Interior Lighting, Diagnosis and Testing).
B1327 Circuit of passenger door contact switch faulty (open circuit). REFER to: Interior Lighting - Vehicles Built Up To: 10/2005 (417-02 Interior Lighting, Diagnosis and Testing).
B1571 Circuit of rear left door contact switch faulty (open circuit). REFER to: Interior Lighting - Vehicles Built Up To: 10/2005 (417-02 Interior Lighting, Diagnosis and Testing).
B1335 Circuit of rear right door contact switch faulty (open circuit). REFER to: Interior Lighting - Vehicles Built Up To: 10/2005 (417-02 Interior Lighting, Diagnosis and Testing).
B1331 Circuit of tailgate contact switch faulty (open circuit). REFER to: Interior Lighting - Vehicles Built Up To: 10/2005 (417-02 Interior Lighting, Diagnosis and Testing).
B1342 Module fault. INSTALL a new GEM.
B1343 Circuit of rear window heater switch faulty (short to ground). REFER to: (501-11 Glass, Frames and Mechanisms)
Glass, Frames and Mechanisms (Diagnosis and Testing),
Glass, Frames and Mechanisms - Vehicles With: Double Locking (Diagnosis and Testing).
B1350 Circuit of heated rear window relay faulty (short to ground). REFER to: (501-11 Glass, Frames and Mechanisms)
Glass, Frames and Mechanisms (Diagnosis and Testing),
Glass, Frames and Mechanisms - Vehicles With: Double Locking (Diagnosis and Testing).
B1349 Circuit of heated rear window relay faulty (short to voltage). REFER to: (501-11 Glass, Frames and Mechanisms)
Glass, Frames and Mechanisms (Diagnosis and Testing),
Glass, Frames and Mechanisms - Vehicles With: Double Locking (Diagnosis and Testing).
B1446 Circuit of windshield wiper limit switch (park position) faulty (short to ground). REFER to: Wipers and Washers (501-16 Wipers and Washers, Diagnosis and Testing).
B1499 Circuit of left-hand turn signal lamp faulty (short to ground). REFER to: Turn Signal and Hazard Lamps (417-01 Exterior Lighting, Diagnosis and Testing).
B1503 Circuit of right-hand turn signal lamp faulty (short to ground). REFER to: Turn Signal and Hazard Lamps (417-01 Exterior Lighting, Diagnosis and Testing).
B2282 Circuit of left-hand turn signal lamp switch faulty (short to ground). REFER to: Turn Signal and Hazard Lamps (417-01 Exterior Lighting, Diagnosis and Testing).
B2281 Circuit of right-hand turn signal lamp switch faulty (short to ground). REFER to: Turn Signal and Hazard Lamps (417-01 Exterior Lighting, Diagnosis and Testing).
B1519 Circuit of hood contact switch faulty (open circuit). REFER to: Anti-Theft - Active (419-01A Anti-Theft - Active, Diagnosis and Testing).
B2555 Circuit of interior light faulty (short to voltage) REFER to: Interior Lighting - Vehicles Built Up To: 10/2005 (417-02 Interior Lighting, Diagnosis and Testing).
B2598 Circuit of exterior lighting relay faulty (short to voltage) REFER to: Headlamps (417-01 Exterior Lighting, Diagnosis and Testing).
B1695 Circuit of headlamp switch (Autolamps) faulty (short to voltage) - vehicles with auto-on system for exterior lighting. REFER to: Headlamps (417-01 Exterior Lighting, Diagnosis and Testing).
B1578 Circuit of marker lamp faulty (short to ground). REFER to: Parking, Rear and License Plate Lamps (417-01 Exterior Lighting, Diagnosis and Testing).
B1810 Circuit of reversing light switch faulty (short to voltage). REFER to: Reversing Lamps (417-01 Exterior Lighting, Diagnosis and Testing).
B1315 Circuit of battery protection relay faulty (short to voltage). Refer to the Ford approved diagnostic tool.
B1316 Circuit of battery protection relay faulty (short to ground). Refer to the Ford approved diagnostic tool.
B1875 Circuit of hazard warning light switch faulty (short to ground). REFER to: Turn Signal and Hazard Lamps (417-01 Exterior Lighting, Diagnosis and Testing).
B2248 Circuit of heated windshield relay faulty (short to voltage). REFER to: (501-11 Glass, Frames and Mechanisms)
Glass, Frames and Mechanisms (Diagnosis and Testing),
Glass, Frames and Mechanisms - Vehicles With: Double Locking (Diagnosis and Testing).
B2256 Circuit of heated windshield relay faulty (short to ground). REFER to: (501-11 Glass, Frames and Mechanisms)
Glass, Frames and Mechanisms (Diagnosis and Testing),
Glass, Frames and Mechanisms - Vehicles With: Double Locking (Diagnosis and Testing).
B2113 Circuit of windshield heating switch faulty (short to ground). REFER to: (501-11 Glass, Frames and Mechanisms)
Glass, Frames and Mechanisms (Diagnosis and Testing),
Glass, Frames and Mechanisms - Vehicles With: Double Locking (Diagnosis and Testing).
B2114 Circuit of windshield washer system switch faulty (short to ground). REFER to: Wipers and Washers (501-16 Wipers and Washers, Diagnosis and Testing).
B2115 Circuit of rear window washer system switch faulty (short to ground). REFER to: Wipers and Washers (501-16 Wipers and Washers, Diagnosis and Testing).
B2177 Circuit of interior scanning sensor faulty. REFER to: Anti-Theft - Active (419-01A Anti-Theft - Active, Diagnosis and Testing).
B1439 Circuit of windshield wash/wipe system switch (intermittent position) faulty (open circuit). REFER to: Wipers and Washers (501-16 Wipers and Washers, Diagnosis and Testing).
B1611 Circuit of rear wash/wipe system switch faulty. REFER to: Wipers and Washers (501-16 Wipers and Washers, Diagnosis and Testing).
B2339 Circuit of switch for electrically adjustable exterior mirrors faulty. REFER to: (501-09 Rear View Mirrors)
Rear View Mirrors (Diagnosis and Testing),
Rear View Mirrors - Vehicles Built Up To: 10/2005, Vehicles With: Double Locking (Diagnosis and Testing),
Rear View Mirrors (Diagnosis and Testing).
B1101 Circuit of electrically adjustable exterior mirrors faulty (short to ground). REFER to: (501-09 Rear View Mirrors)
Rear View Mirrors (Diagnosis and Testing),
Rear View Mirrors - Vehicles Built Up To: 10/2005, Vehicles With: Double Locking (Diagnosis and Testing),
Rear View Mirrors (Diagnosis and Testing).
B110B Circuit of relay for electrically adjustable exterior mirrors faulty (short to ground). REFER to: (501-09 Rear View Mirrors)
Rear View Mirrors (Diagnosis and Testing),
Rear View Mirrors - Vehicles Built Up To: 10/2005, Vehicles With: Double Locking (Diagnosis and Testing),
Rear View Mirrors (Diagnosis and Testing).
B211A Circuit of windshield washer system relay faulty (short to ground). REFER to: Wipers and Washers (501-16 Wipers and Washers, Diagnosis and Testing).
B2477 Module configuration faulty. CONFIGURE GEM again using the Ford approved diagnostic tool. If the fault occurs again, RENEW THE GEM.
B2112 Circuit of anti-theft alarm system activation switch faulty (short to ground). REFER to: Anti-Theft - Active (419-01A Anti-Theft - Active, Diagnosis and Testing).
B2116 Circuit of anti-theft alarm system deactivation switch faulty (short to ground). REFER to: Anti-Theft - Active (419-01A Anti-Theft - Active, Diagnosis and Testing).
B2665 Circuit of alarm horn with battery faulty (short to voltage). REFER to: Anti-Theft - Active (419-01A Anti-Theft - Active, Diagnosis and Testing).
B1554 Tailgate unlocking circuit faulty (short to ground) REFER to: Locks, Latches and Entry Systems (501-14 Handles, Locks, Latches and Entry Systems, Diagnosis and Testing).
B1553 Tailgate unlocking circuit faulty (short to voltage) REFER to: Locks, Latches and Entry Systems (501-14 Handles, Locks, Latches and Entry Systems, Diagnosis and Testing).
B1551 Circuit of tailgate unlocking switch faulty (short to ground). REFER to: Locks, Latches and Entry Systems (501-14 Handles, Locks, Latches and Entry Systems, Diagnosis and Testing).
B1600 Circuit of PATS transponder faulty. Refer to the Ford approved diagnostic tool.
B2108 Circuit of tailgate contact switch faulty. REFER to: Locks, Latches and Entry Systems (501-14 Handles, Locks, Latches and Entry Systems, Diagnosis and Testing).
B1298 Circuit of power supply sensor (terminal 15) faulty (short to voltage). GO to Pinpoint Test A.
B1299 Circuit of power supply sensor (terminal 15) faulty (short to ground). GO to Pinpoint Test A.
B2432 Circuit of driver's side belt buckle switch faulty. Refer to the Ford approved diagnostic tool.
U0146 No communication with gateway A. REFER to: Communications Network - Vehicles Built From: 10/2005 (418-00 Module Communications Network, Diagnosis and Testing).
U0151 No communication with the restraints control module. REFER to: Communications Network - Vehicles Built From: 10/2005 (418-00 Module Communications Network, Diagnosis and Testing).
U0155 No communication with the electronic instrument cluster. REFER to: Communications Network - Vehicles Built From: 10/2005 (418-00 Module Communications Network, Diagnosis and Testing).
U0231 No communication with the light switch module. REFER to: Communications Network - Vehicles Built From: 10/2005 (418-00 Module Communications Network, Diagnosis and Testing).
U0166 No communication with the fuel fired booster heater. REFER to: Communications Network - Vehicles Built From: 10/2005 (418-00 Module Communications Network, Diagnosis and Testing).

Symptom chart

Symptom chart

Symptom Possible Sources Action
Generic electronic module (GEM) not communicating with the diagnostic unit.
*
Fuse(s).
*
Circuit(s).
*
Generic electronic module (GEM).
*
REFER to: Communications Network - Vehicles Built From: 10/2005 (418-00 Module Communications Network, Diagnosis and Testing).

System Check

PINPOINT TEST A : VOLTAGE SUPPLY (TERM. 15) FAULTY.
TEST CONDITIONS DETAILS/RESULTS/ACTIONS
A1: CHECK FUSE F38
1
Ignition switch in position 0.
2
CHECK fuse F38 (CJB).

Is the fuse OK?
Yes
GO to A2.
No
RENEW fuse F38 (7.5 A). CHECK the operation of the system. If the fuse blows again, LOCATE and REPAIR the short using the Wiring Diagrams.
A2: CHECK THE VOLTAGE AT FUSE F38
1
Connect fuse F38 (CJB).
2
Ignition switch in position II.
3
Measure the voltage between fuse F38 (7.5 A) and ground.

Is battery voltage measured?
Yes
GO to A3.
No
CHECK the voltage supply to fuse F38 and REPAIR using the Wiring Diagrams. CHECK the operation of the system.
A3: CHECK CIRCUIT BETWEEN FUSE F38 AND GENERIC ELECTRONIC MODULE (GEM) FOR SHORT TO VOLTAGE
1
Ignition switch in position 0.
2
Disconnect Connector C319 from GEM.

3
Measure the voltage between the GEM, connector C319, pin 10, circuit 15-DK20 (GN/OG), wiring harness side and ground.

Is a voltage measured?
Yes
LOCATE and RECTIFY the short to voltage supply in the circuits connected to soldered connection S3 using the Wiring Diagrams. CHECK the operation of the system.
No
GO to A4.
A4: CHECK CIRCUIT BETWEEN FUSE F38 AND GENERIC ELECTRONIC MODULE (GEM) FOR SHORT TO GROUND

1
Measure the resistance between the GEM, connector C319, pin 10, circuit 15-DK20 (GN/OG), wiring harness side and ground.

Is a resistance of more than 10,000 ohms measured?
Yes
TEST the GEM and RENEW as necessary. CHECK the operation of the system.
No
LOCATE and RECTIFY the short to ground in the circuits connected to soldered connection S3 using the Wiring Diagrams. CHECK the operation of the system.

Diagnosis and Testing|Removal and Installation > < Generic Electronic Module (GEM) - Vehicles Built Up To: 10-2005