Ford Falcon. Manual — part 349

413-13-13 Parking

Aid 413-13-13

DIAGNOSIS AND TESTING (Continued)

Test Step

Result / Action to Take

G2

CHECK CONTINUITY OF SPEAKER SUPPLY WIRE

Check continuity of speaker supply wire between the Reverse

Yes

Sensing System ECU and speaker connectors

Fault in wiring loom. Locate fault and repair
wiring. Please refer to schematics section for

Is the measured resistance open circuit?

information on wiring.

No

Fault in Reverse sensing system ECU. Replace
ECU. Retest for correct operation.

PINPOINT TEST H : NO SOUND FROM SPEAKER - PART 3

Test Step

Result / Action to Take

H1

CHECK SPEAKER SIGNAL WIRE

Measure voltage on speaker signal wire whilst speaker is still

Yes

connected. Refer to removal and installation section of entry for

Go to H2

instructions for accessing module.

No

Is the measured voltage > 9V?

Go to I2

H2

CHECK SPEAKER SIGNAL WIRE VOLTAGE WHILST

TOGGLING SPEAKER ON AND OFF

Measure voltage on the speaker signal wire whilst toggling the

Yes

speaker on/off using the WDS function test

Speaker is faulty. Replace speaker. Retest for
correct operation.

Does speaker voltage drop by at least 2V when speaker is
switched on?

No

Go to I1

PINPOINT TEST I : NO SOUND FROM SPEAKER - PART 4

Test Step

Result / Action to Take

I1

MEASURE FOR SHORT BETWEEN SPEAKER SIGNAL

WIRE AND SPEAKER SUPPLY WIRE

Unplug Reverse Sensing System ECU and speaker

Yes

Fault in wiring loom. Locate fault and repair

Measure resistance between speaker signal wire and speaker supply

wiring. Please refer to schematics section for

wire.

information on wiring.

Is measured resistance short circuit?

No

Go to I3

I2

MEASURE FOR SHORT BETWEEN SPEAKER SUPPLY

WIRE AND VEHICLE GROUND

Unplug Reverse Sensing System ECU and speaker

Yes

Fault in wiring loom. Locate fault and repair

Measure resistance between speaker supply wire and vehicle ground

wiring. Please refer to schematics section for
information on wiring.

Is measured resistance short circuit?

No

Go to G2

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413-13-14 Parking

Aid 413-13-14

DIAGNOSIS AND TESTING (Continued)

Test Step

Result / Action to Take

I3

CHECK CONTINUITY OF SPEAKER SIGNAL WIRE

Check continuity of speaker supply wire between the Reverse

Yes

Sensing System ECU and speaker connectors

Fault in wiring loom. Locate fault and repair
wiring. Please refer to schematics section for

Is the measured resistance open circuit?

information on wiring.

No

Fault in Reverse sensing system ECU. Replace
ECU. Retest for correct operation.

PINPOINT TEST J : CHECK TRAILER PLUG SWITCH

Test Step

Result / Action to Take

J1

CHECK TRAILER PLUG SWITCH SIGNAL WIRE

Remove Trailer plug and access wire connections.

Yes

Go to J2

Measure voltage on Trailer Switch Signal wire.

No

Is Voltage > 9V

Go to J3

J2

CHECK TRAILER PLUG SWITCH

Measure voltage on Trailer Plug Switch Signal wire while operating

Yes

switch by opening and closing the Trailer Plug Connector Cover

Replace ECU. Retest system for correct
operation.

W ith the Cover OPEN

No

Is voltage < 1.5V ?

Go to J4

J3

CHECK CONTINUITY OF WIRE BETWEEN THE ECU

AND TRAILER PLUG

Unplug Reverse Sensing System ECU.

Yes

Go to J5

Measure resistance of signal wire between ECU Trailer input ( Pin 14
) and the Trailer plug.

No

Open circuit in wiring loom. Please refer to

Is resistance = short circuit?

schematics section for information on wiring.

J4

CHECK GROUND ON SWITCH

Measure for continuity to ground between the trailer switch and

Yes

vehicle ground.

Replace Trailer plug.

Is resistance = short circuit?

No

Open circuit in wiring loom. Please refer to
schematics section for information on wiring.

J5

CHECK CONTINUITY OF WIRE BETWEEN THE ECU

AND GROUND

Unplug Reverse Sensing System ECU.

Yes

Short circuit in wiring loom. Please refer to

Measure resistance of signal wire between ECU Trailer input ( Pin 14

schematics section for information on wiring.

) and Vehicle Ground.

No

Is resistance = short circuit?

Replace ECU.

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413-13-15 Parking

Aid 413-13-15

REMOVAL AND INSTALLATION

5. Remove the electrical connector from module.

Reverse Sensing System ECU

Removal
1. Lower the rear seats.

6. Use a stubby phillips head screw driver to remove

the two screws, and remove the module.

2. Remove Fir trees on parcel shelf

Installation
1. To install, reverse the removal process.

3. Remove anchor point from top of parcel shelf.

4. Lift up parcel shelf and move it up of the way. For

additional information refer to section 501-05.

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413-13-16 Parking

Aid 413-13-16

REMOVAL AND INSTALLATION (Continued)

Sensors

Removal
1. Detach bumper from vehicle. For additional

information refer to Bumper in section 501-19.

Item

Description

Item

Description

7

Remove main body of sensor.

1

Disconnect wiring from sensor.

8

Remove bezel.

2

Remove sensor from holder by gently

prying catches on holder.

9

Remove Decoupling ring.

3

Remove sensor.

Installation

4

Remove retaining spring.

1. To install, reverse the removal process.

5

Pull spring out gently so that spring is not

damaged.

6

Remove main body of sensor holder from

bezel by gently prying catches on the main

body.

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