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Ford Workshop Service and Repair Manuals

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Mondeo 2007.5 (02.2007-)

Exterior Lighting - Trailer Lamps Mondeo 2007.5 (02/2007-)
Diagnosis and Testing

Refer to Wiring Diagrams Section 417-01, for schematic and connector information.

Special Tool(s)

Terminal Probe Kit

29-011A
General Equipment
Digital Multimeter.
Diagnostic tool.

Inspection and Verification

NOTE:
NOTE:The generic electronic module (GEM) is part of the central junction box (CJB).
NOTE:
NOTE:If a new GEM module is being installed, the new module must be configured following installation. For this purpose, the vehicle-specific data is read out of the module to be changed using the diagnostic equipment and is transferred to the new module. REFER to:
Module Configuration (418-01 Module Configuration, General Procedures),
Generic Electronic Module (GEM) (419-10 Multifunction Electronic Modules, Diagnosis and Testing).
NOTE:
NOTE:Before reading out the vehicle-specific data make sure that all electrical connections in the vehicle are reconnected so that the module and the diagnostic unit can communicate correctly.
NOTE:
NOTE:Ensure correct engagement of the wiring harness connectors.
NOTE:
NOTE:The maximum output voltage at the trailer socket is 13 Volt.
  1. Verify the customer concern.
  1. Visually inspect for obvious signs of mechanical or electrical damage.

Visual Inspection Chart

Electrical
  • Fuse(s)
  • Bulb(s).
  • Electrical connectors.
  • Trailer socket.
  • Trailer Lamps.
  • Vehicle wiring harness.
  1. If an obvious cause for an observed or reported concern is found, correct the cause (if possible) before proceeding to the next step. CHECK system operates correctly
  1. If the concern persists after the visual inspection, PERFORM a fault diagnosis with the diagnostic unit and RECTIFY any displayed faults in accordance with the displayed fault description. CHECK system operates correctly
  1. On a vehicle without stored fault(s), continue according to the Symptom Chart and the corresponding symptom.
  1. After testing or rectifying the fault and after completion of operations, READ OUT the fault memories of all vehicle modules and DELETE any stored faults. READ OUT all fault memories again after a road test.

Trouble Code Table - Generic Electronic Module (GEM)

Trouble Code Table - Generic Electronic Module (GEM)

Self-test code Description Action
511B11 Stop lamp circuit faulty. GO to Pinpoint Test A.
511B12 Circuit of stop lamps faulty (short to battery voltage). GO to Pinpoint Test C.
512011 Circuit of backup lamp faulty. GO to Pinpoint Test A.
512012 Circuit of backup lamp faulty (short to battery voltage). GO to Pinpoint Test C.
512611 Circuit of parking lamps faulty. GO to Pinpoint Test A.
512612 Circuit of parking lamps faulty (short to battery voltage). GO to Pinpoint Test C.
910262 Conflicting stop lamps input signals at the trailer module (CAN bus and circuit). GO to Pinpoint Test A.
9A7911 Circuit of rear fog lamp faulty. GO to Pinpoint Test A.
9A7912 Circuit of rear fog lamp faulty (short to battery voltage). GO to Pinpoint Test C.
9D0611 Circuit of left-hand turn signal lamps faulty. GO to Pinpoint Test B.
9D0612 Circuit of left-hand turn signal lamp faulty (short to battery voltage). GO to Pinpoint Test C.
9D0711 Circuit of right-hand turn signal lamps faulty. GO to Pinpoint Test B.
9D0712 Circuit of right-hand turn signal lamp faulty (short to battery voltage). GO to Pinpoint Test C.
C01000 Communication fault in the MS CAN bus. REFER to: Communications Network (418-00 Module Communications Network, Diagnosis and Testing).
C14000 No communication between the GEM and the trailer module. REFER to: Communications Network (418-00 Module Communications Network, Diagnosis and Testing).
C30000 Trailer module and software (CAN bus) not compatible. REFER to: Module Configuration (418-01 Module Configuration, General Procedures).
E10000 Trailer module not configured. REFER to: Module Configuration (418-01 Module Configuration, General Procedures).
E10100 Trailer module incorrectly configured. REFER to: Module Configuration (418-01 Module Configuration, General Procedures).
F00042 Internal module fault - general memory fault. RENEW trailer module
F00051 Module programming fault - not programmed. REFER to: Module Configuration (418-01 Module Configuration, General Procedures).
F00362 Fault in the power supply to the trailer module. GO to Pinpoint Test A.

Symptom Chart

Symptom Chart

Symptom Possible Sources Action
Trailer lamps inoperative, OK on vehicle
*
Fuse.
*
Circuit(s) in vehicle.
*
Circuit(s) in trailer.
*
Trailer Module.
*
Trailer socket.
*
GO to Pinpoint Test A.
The individual trailer lamp is inoperative.
*
Circuit(s) in vehicle.
*
Circuit(s) in trailer.
*
Trailer module.
*
Trailer socket.
*
GO to Pinpoint Test B.
The trailer lamps are on continuously.
*
Circuit(s) in vehicle.
*
Circuit(s) in trailer.
*
Trailer module.
*
Trailer socket.
*
GO to Pinpoint Test C.

Pinpoint test

NOTE:
NOTE:Use a digital multimeter for all electrical measurements.

PINPOINT TEST A : TRAILER LAMPS INOPERATIVE, LAMPS ON VEHICLE OK
TEST CONDITIONS DETAILS/RESULTS/ACTIONS
A1: DETERMINE THE CAUSE OF THE FAULT
1
Ignition switch in position II.
2
CHECK the trailer lamps after every step.
3
APPLY the brakes.
4
SWITCH ON the dipped beam.
5
SWITCH ON the rear fog lamps.
6
SWITCH ON the left-hand turn signal.
7
SWITCH ON the right-hand turn signal.
8
ENGAGE reverse gear.

Are all trailer lamps inoperative?
Yes
GO to A2.
No
- Both trailer stoplamps inoperative: GO to A7.
- Both trailer rear lamps inoperative: GO to A17.
- Trailer rear fog lamp inoperative: GO to A11.
- Both trailer turn signal lamps inoperative: RENEW trailer module. CHECK system operates correctly
- Trailer backup lamp inoperative: GO to A14.
- Stoplamps functioning and parking lamps permanently lit:
REFER to: Communications Network (418-00 Module Communications Network, Diagnosis and Testing).
A2: CHECK GROUND CONNECTION OF TRAILER SOCKET FOR OPEN CIRCUIT

1
Measure the resistance between the trailer socket, connector C4AT23-D, pin 3, circuit GD160A(B) (BR/WH) and ground.

Is a resistance of less than 2 Ohms registered?
Yes
GO to A3.
No
LOCATE and RECTIFY the break in the circuit GD160A(B) (BR/WH) between the trailer socket and ground connection G4D151-A with the aid of the Wiring Diagrams. CHECK system operates correctly If necessary RENEW the trailer socket. CHECK system operates correctly
A3: CHECK FUSE FA11 (40 A) (RJB)
1
Ignition switch in position 0.
2
Disconnect Fuse FA11 (40 A) (RJB).
3
CHECK Fuse FA11 (40 A) (RJB).

Is the fuse in order?
Yes
GO to A4.
No
RENEW fuse FA11 (40 A) (RJB) and CHECK the operation of the system. If the fuse blows again, LOCATE and RECTIFY the short using the Wiring Diagrams. CHECK system operates correctly
A4: CHECK THE VOLTAGE SUPPLY TO FUSE FA11 (40 A) (RJB) FOR OPEN CIRCUIT
1
Connect Fuse FA11 (40 A) (RJB).
2
Ignition switch in position II.
3
Measure the voltage between fuse FA11 (40 A) (RJB) and ground.

Does meter display battery voltage?
Yes
GO to A5.
No
LOCATE and RECTIFY the break in the voltage supply of fuse FA11 (40 A) (RJB) with the aid of the Wiring Diagrams. CHECK system operates correctly
A5: CHECK VOLTAGE SUPPLY OF TRAILER MODULE FOR OPEN CIRCUIT
1
Ignition switch in position 0.
2
Disconnect Trailer module from connector C4AT23-B.
3
Ignition switch in position II.

4
Measure the voltage between the trailer module, connector C4AT23-B, pin 2, circuit SBR11A (BU/RD), wiring harness side and ground.

Does the meter display battery voltage?
Yes
GO to A6.
No
LOCATE and RECTIFY break in circuit SBR11A (BU/RD) between fuse FA11 (40 A) (RJB) and trailer module. CHECK system operates correctly INSTALL A NEW RJB if required. CHECK system operates correctly
A6: CHECK GROUND SUPPLY OF TRAILER MODULE FOR OPEN CIRCUIT
1
Ignition switch in position 0.
2
Disconnect Trailer module from connector C4AT23-C.

3
Measure the resistance between trailer module, connector C4AT23-C, pin 4, circuit GD152C (BK/BU), wiring harness side and ground.

Is a resistance of less than 2 Ohms registered?
Yes
RENEW trailer module. CHECK system operates correctly
No
LOCATE and RECTIFY break in circuit GD152C (BK/BU) between trailer module and soldered connection SP600 using the Wiring Diagrams. CHECK system operates correctly
A7: CHECK THE VOLTAGE AT THE TRAILER SOCKET WITH THE STOP LAMPS SWITCHED ON
NOTE:
NOTE:Keep the brake pedal depressed during the following measurement.
1
Ignition switch in position II.
2
APPLY the brakes.

3
Measure the voltage between the trailer socket, connector C4AT23-D, pin 6, circuit CAT19A (VT) and ground.

Does the meter display battery voltage?
Yes
Continue fault finding on the trailer.
No
GO to A8.
A8: CHECK CIRCUIT CAT19A (VT) BETWEEN TRAILER MODULE AND TRAILER SOCKET FOR OPEN CIRCUIT
1
Ignition switch in position 0.
2
Disconnect Trailer module from connector C4AT23-A.

3
Measure resistance between trailer module, connector C4AT23-A, pin 3, circuit CAT19A (VT), wiring harness side and trailer socket, connector C4AT23-D, pin 6, circuit CAT19A (VT), wiring harness side.

Is a resistance of less than 2 Ohms registered?
Yes
GO to A9.
No
LOCATE and RECTIFY break in circuit CAT19A (VT) between trailer module and trailer socket using the Wiring Diagrams. CHECK system operates correctly If necessary RENEW the trailer socket. CHECK system operates correctly
A9: CHECK CIRCUIT CAT19A (VT) BETWEEN TRAILER MODULE AND TRAILER SOCKET FOR SHORT TO GROUND

1
Measure the resistance between the trailer socket, connector C4AT23-D, pin 6, circuit CAT19A (VT), wiring harness side and ground.

Is a resistance of more than 10,000 Ohm measured?
Yes
GO to A10.
No
LOCATE and RECTIFY the short to ground in the circuit between trailer module and trailer socket with the aid of the wiring diagrams. CHECK system operates correctly If necessary RENEW the trailer socket. CHECK system operates correctly
A10: CHECK CIRCUIT BETWEEN GEM AND TRAILER MODULE FOR OPEN CIRCUIT
NOTE:
NOTE:Keep the brake pedal depressed during the following measurement.
1
Disconnect Trailer module from connector C4AT23-C.
2
Ignition switch in position II.
3
APPLY the brakes.

4
Measure the voltage between trailer module, connector C4AT23-C, pin 3, circuit CLS44E (VT/BN), wiring harness side and ground.

Does the meter display battery voltage?
Yes
RENEW trailer module. CHECK system operates correctly
No
LOCATE and RECTIFY break in circuit CLS44E (VT/BN) between soldered connection SP451 and trailer module using the Wiring Diagrams. CHECK system operates correctly
A11: CHECK THE VOLTAGE AT THE TRAILER SOCKET WITH THE REAR FOG LAMPS SWITCHED ON
1
Ignition switch in position II.
2
Switch on the REAR FOG LAMPS.
3
SWITCH ON the dipped beam.

4
Measure the voltage between the trailer socket, connector C4AT23-D, pin 2, circuit CAT07A (RD/YE) and ground.

Does the meter display battery voltage?
Yes
Continue fault finding on the trailer.
No
GO to A12.
A12: CHECK CIRCUIT CAT07A (RD/YE) BETWEEN TRAILER MODULE AND TRAILER SOCKET FOR OPEN CIRCUIT
1
Ignition switch in position 0.
2
Disconnect Trailer module from connector C4AT23-A.

3
Measure the resistance between the trailer module, connector C4AT23-A, pin 8, circuit CAT07A (RD/YE), wiring harness side and the trailer socket, connector C4AT23-D, pin 2, circuit CAT07A (RD/YE), wiring harness side.

Is a resistance of less than 2 Ohms registered?
Yes
GO to A13.
No
LOCATE and RECTIFY break in circuit CAT07A (RD/YE) between trailer module and trailer socket using the Wiring Diagrams. CHECK system operates correctly If necessary RENEW the trailer socket. CHECK system operates correctly
A13: CHECK CIRCUIT CAT07A (RD/YE) BETWEEN THE TRAILER MODULE AND THE TRAILER SOCKET FOR SHORT TO GROUND

1
Measure the resistance between the trailer socket, connector C4AT23-D, pin 2, circuit CAT07A (RD/YE), wiring harness side and ground.

Is a resistance of more than 10,000 Ohm measured?
Yes
RENEW trailer module. CHECK system operates correctly
No
LOCATE and RECTIFY the short to ground in the circuit between trailer module and trailer socket with the aid of the wiring diagrams. CHECK system operates correctly If necessary RENEW the trailer socket. CHECK system operates correctly
A14: CHECK THE VOLTAGE AT THE TRAILER SOCKET WITH THE REVERSING LAMPS SWITCHED ON
1
Ignition switch in position II.
2
ENGAGE reverse gear.

3
Measure the voltage between the trailer socket C4AT23-D, pin 8, circuit CAT03A (VT/OG) and ground.

Does the meter display battery voltage?
Yes
Continue fault finding on the trailer.
No
GO to A15.
A15: CHECK CIRCUIT CAT03A (VT/OG) BETWEEN THE TRAILER MODULE AND THE TRAILER SOCKET FOR OPEN CIRCUIT
1
Ignition switch in position 0.
2
Disconnect Trailer module from connector C4AT23-A.

3
Measure the resistance between the trailer module, connector C4AT23-A, pin 6, circuit CAT03A (VT/OG), wiring harness side and the trailer socket, connector C4AT23-D, pin 8, circuit CAT03A (VT/OG), wiring harness side.

Is a resistance of less than 2 Ohms registered?
Yes
GO to A16.
No
LOCATE and RECTIFY break in circuit CAT03A (VT/OG) between trailer module and trailer socket using the Wiring Diagrams. CHECK system operates correctly If necessary RENEW the trailer socket. CHECK system operates correctly
A16: CHECK CIRCUIT CAT03A (VT/OG) BETWEEN THE TRAILER MODULE AND THE TRAILER SOCKET FOR SHORT TO GROUND

1
Measure the resistance between the trailer socket, connector C4AT23-D, pin 8, circuit CAT03A (VT/OG), wiring harness side and ground.

Is a resistance of more than 10,000 Ohm measured?
Yes
RENEW trailer module. CHECK system operates correctly
No
LOCATE and RECTIFY the short to ground in the circuit between trailer module and trailer socket with the aid of the wiring diagrams. CHECK system operates correctly If necessary RENEW the trailer socket. CHECK system operates correctly
A17: CHECK CIRCUITS CAT11A/B (OG) BETWEEN THE TRAILER MODULE AND THE TRAILER SOCKET FOR SHORT TO GROUND
1
Ignition switch in position 0.
2
Disconnect Trailer module from connector C4AT23-A.

3
Measure the resistance between the trailer module, connector C4AT23-A, pin 12, circuit CAT11A/B (OG), wiring harness side and ground.

Is a resistance of more than 10,000 Ohm measured?
Yes
RENEW trailer module. CHECK system operates correctly
No
LOCATE and RECTIFY the short to ground in the circuits connected to the trailer module, connector C4AT23-A, pin 12 with the aid of the Wiring Diagrams. CHECK system operates correctly If necessary RENEW the trailer socket. CHECK system operates correctly

PINPOINT TEST B : INDIVIDUAL TRAILER LAMPS INOPERATIVE, LAMPS ON VEHICLE OK
TEST CONDITIONS DETAILS/RESULTS/ACTIONS
B1: DETERMINE THE CAUSE OF THE FAULT
1
Ignition switch in position II.
2
CHECK the trailer lamps after every step.
3
APPLY the brakes.
4
SWITCH ON the left-hand turn signal.
5
SWITCH ON the right-hand turn signal.
6
SWITCH ON the dipped beam.

Is the left-hand turn signal lamp on the trailer inoperative?
Yes
GO to B2.
No
- One trailer stoplamp inoperative: LOCATE and RECTIFY the break in the circuits on the trailer with the aid of the wiring diagrams. CHECK system operates correctly
- Right-hand trailer turn signal lamp inoperative: GO to B5.
- Left-hand rear trailer rear lamp inoperative: GO to B8.
- Right-hand rear trailer lamp inoperative: GO to B9.
B2: CHECK THE VOLTAGE AT THE TRAILER SOCKET WITH THE LEFT-HAND TURN SIGNAL SWITCHED ON
1
Ignition switch in position II.
2
SWITCH ON the left-hand turn signal.

3
Measure the voltage between the trailer socket, connector C4AT23-D, pin 1, circuit CAT06A (BU) and ground.

Does the voltage alternate between 0 V and battery voltage?
Yes
Continue fault finding on the trailer.
No
GO to B3.
B3: CHECK CIRCUIT CAT06A (BU) BETWEEN THE TRAILER MODULE AND THE TRAILER SOCKET FOR OPEN CIRCUIT
1
Ignition switch in position 0.
2
Disconnect Trailer module from connector C4AT23-A.

3
Measure the resistance between the trailer module, connector C4AT23-A, pin 10, circuit CAT06A (BU), wiring harness side and the trailer socket, connector C4AT23-D, pin 1, circuit CAT06A (BU), wiring harness side.

Is a resistance of less than 2 Ohms registered?
Yes
GO to B4.
No
LOCATE and RECTIFY break in circuit CAT06A (BU) between trailer module and trailer socket using the Wiring Diagrams. CHECK system operates correctly If necessary RENEW the trailer socket. CHECK system operates correctly
B4: CHECK CIRCUIT CAT06A (BU) BETWEEN THE TRAILER MODULE AND THE TRAILER SOCKET FOR SHORT TO GROUND

1
Measure the resistance between the trailer socket, connector C4AT23-D, pin 1, circuit CAT06A (BU), wiring harness side and ground.

Is a resistance of more than 10,000 Ohm measured?
Yes
RENEW trailer module. CHECK system operates correctly
No
LOCATE and RECTIFY the short to ground in the circuit between trailer module and trailer socket with the aid of the wiring diagrams. CHECK system operates correctly If necessary RENEW the trailer socket. CHECK system operates correctly
B5: CHECK THE VOLTAGE AT THE TRAILER SOCKET WITH THE RIGHT-HAND TURN SIGNAL SWITCHED ON
1
Ignition switch in position II.
2
SWITCH ON the right-hand turn signal.

3
Measure the voltage between the trailer socket, connector C4AT23-D, pin 4, circuit CAT09A (BU) and ground.

Does the voltage alternate between 0 V and battery voltage?
Yes
Continue fault finding on the trailer.
No
GO to B6.
B6: CHECK CIRCUIT CAT09A (BU/RD) BETWEEN THE TRAILER MODULE AND THE TRAILER SOCKET FOR OPEN CIRCUIT
1
Ignition switch in position 0.
2
Disconnect Trailer module from connector C4AT23-A.

3
Measure the resistance between the trailer module, connector C4AT23-A, pin 1, circuit CAT09A (BU/RD), wiring harness side and the trailer socket, connector C4AT23-D, pin 4, circuit CAT09A (BU/RD), wiring harness side.

Is a resistance of less than 2 Ohms registered?
Yes
GO to B7.
No
LOCATE and RECTIFY break in circuit CAT09A (BU/RD) between trailer module and trailer socket using the Wiring Diagrams. CHECK system operates correctly If necessary RENEW the trailer socket. CHECK system operates correctly
B7: CHECK CIRCUIT CAT09A (BU/RD) BETWEEN THE TRAILER MODULE AND THE TRAILER SOCKET FOR SHORT TO GROUND

1
Measure the resistance between the trailer socket, connector C4AT23-D, pin 4, circuit CAT09A (BU/RD), wiring harness side and ground.

Is a resistance of more than 10,000 Ohm measured?
Yes
RENEW trailer module. CHECK system operates correctly
No
LOCATE and RECTIFY the short to ground in the circuit between trailer module and trailer socket with the aid of the wiring diagrams. CHECK system operates correctly If necessary RENEW the trailer socket. CHECK system operates correctly
B8: CHECK THE VOLTAGE AT THE TRAILER SOCKET WITH THE PARKING LIGHTS SWITCHED ON
1
SWITCH ON the parking lamps.

2
Measure the voltage between the trailer socket, connector C4AT23-D, pin 7, circuit CAT11A (OG) and ground.

Does the meter display battery voltage?
Yes
Continue fault finding on the trailer.
No
LOCATE and RECTIFY the break in the circuit between the trailer module and the trailer socket using the Wiring Diagrams. CHECK system operates correctly If necessary RENEW the trailer socket. CHECK system operates correctly
B9: CHECK THE VOLTAGE AT THE TRAILER SOCKET WITH THE PARKING LIGHTS SWITCHED ON
1
Switch on side light.

2
Measure the voltage between the trailer socket, connector C4AT23-D, pin 5, circuit CAT11B (OG) and ground.

Does the meter display battery voltage?
Yes
Continue fault finding on the trailer.
No
LOCATE and RECTIFY the break in the circuit between the trailer module and the trailer socket using the Wiring Diagrams. CHECK system operates correctly If necessary RENEW the trailer socket. CHECK system operates correctly

PINPOINT TEST C : THE TRAILER LAMPS ARE ON CONTINUOUSLY
TEST CONDITIONS DETAILS/RESULTS/ACTIONS
C1: DETERMINE THE FAULT CONDITION
NOTE:
NOTE:Ensure that no adapter or trailer is connected to the trailer coupling socket.
1
Ignition switch in position II.
2
CHECK the stop lamps at the vehicle.

Are the stoplamps on the vehicle permanently lit?
Yes
REFER to: Bremsleuchten (417-01, Diagnosis and Testing).
No
GO to C2.
C2: RULE OUT TRAILER MODULE AS CAUSE OF FAULT
1
Connect a test adapter or trailer to the trailer coupling socket.
2
Ignition switch in position 0.
3
Disconnect Fuse FA11 (40 A) (RJB).
4
Ignition switch in position II.
5
CHECK the trailer lamps.

Are there any lamps on the trailer which are permanently lit?
Yes
- Left-hand trailer turn signal lamp permanently lit: LOCATE and RECTIFY the short to battery voltage in circuit CAT06A (BU) between the trailer module and the trailer socket with the aid of the Wiring Diagrams. CHECK system operates correctly If necessary RENEW the trailer socket. CHECK system operates correctly
- Right-hand trailer turn signal lamp permanently lit: LOCATE and RECTIFY the short to battery voltage in circuit CAT09A (BU/RD) between the trailer module and the trailer socket with the aid of the Wiring Diagrams. CHECK system operates correctly If necessary RENEW the trailer socket. CHECK system operates correctly
- Trailer stoplamps permanently lit: LOCATE and RECTIFY the short to battery voltage in circuit CAT19A (VT) between the trailer module and the trailer socket with the aid of the Wiring Diagrams. CHECK system operates correctly If necessary RENEW the trailer socket. CHECK system operates correctly
- Trailer backup lamp permanently lit: LOCATE and RECTIFY the short to battery voltage in circuit CAT03A (VT/OG) between the trailer module and the trailer socket with the aid of the Wiring Diagrams. CHECK system operates correctly If necessary RENEW the trailer socket. CHECK system operates correctly
- Rear trailer fog lamp permanently lit: LOCATE and RECTIFY the short to battery voltage in circuit CAT07A (RD/YE) between the trailer module and the trailer socket with the aid of the Wiring Diagrams. CHECK system operates correctly If necessary RENEW the trailer socket. CHECK system operates correctly
- Rear trailer lamps permanently lit: LOCATE and RECTIFY the short to battery voltage in the circuits connected to the trailer module, connector C4AT23-A, pin 12 with the aid of the Wiring Diagrams. CHECK system operates correctly If necessary RENEW the trailer socket. CHECK system operates correctly
No
RENEW trailer module. CHECK system operates correctly If the concern persists, continue fault finding on the trailer. CHECK system operates correctly

Stoplamps > < Parking, Rear and License Plate Lamps