Ford Falcon. Manual — part 348

413-13-9 Parking

Aid 413-13-9

DIAGNOSIS AND TESTING (Continued)

Pin Number(s)

Circuit Designation/Description

Normal Condition/Measurement

1

1441 W (SIG_LC)

No object in Sensor’s field of view

Sensor Signal LH Corner

Voltage = approx. 7.8V

± 0.5V

2

1442 G-W (SIG_LM)

As above

Sensor Signal LH Middle

3

1443 G (SIG_RM)

As above

Sensor Signal RH Middle

4

1444 L-Y (SIG_RC)

As above

Sensor Signal RH Corner

5

1439 Y-R (Sensor_feed)

8.5V

±0.5V

Sensor Feed

6

1440 G-Y (GND)

< 0.5V

Sensor ground

7

NC

8

NC

9

NC

10

NC

11

NC

12

57 E B (GND)

< 0.5V

Ground

13

140D R-B (KL15)

+ 12V

Power Reverse switch

14

1355 BR (Disable)

O.C.= trailer not connected

15

NC

16

NC

17

NC

18

NC

19

NC

20

70 SB-W (Diagnose)

Diagnostic Signal

21

NC

22

1347 B-P (Speaker -)

When Spkr is activated = approx. 2V less than

Speaker -

the Spkr Supply Voltage.

23

1438 G (Speaker +)

With Spkr Connected = approx. 1.5V less than

Speaker +

VBat

Pinpoint tests

PINPOINT TEST A : SENSOR SHORT CIRCUIT TO VBAT

Test Step

Result / Action to Take

A1

CHECK SENSOR SIGNAL WIRE

Remove bumper. Refer to Bumper section for instructions for removal

Yes

of bumper

Go to A2

Unplug sensor.

No

Go to B1

Is Voltage < 1V?

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413-13-10 Parking

Aid 413-13-10

DIAGNOSIS AND TESTING (Continued)

Test Step

Result / Action to Take

A2

CHECK SENSOR SIGNAL WIRE WITH SENSOR

ATTACHED

Plug in sensor

Yes

Go to A3

Measure voltage on sensor signal wire.

No

Is voltage > 5V?

Go to C1

A3

CHECK SENSOR SIGNAL WIRE WITH SENSOR

ATTACHED AND OBJECT DETECTED BY SENSOR

Plug in sensor.

Yes

Go to A4

Monitor voltage on sensor signal wire.

No

Place your hand in front of the sensor.

Internal short circuit in sensor. Replace sensor.

Does the voltage drop when your hand is placed in front of the

Retest system for correct operation.

sensor?

A4

CHECK CONTINUITY OF THE SENSOR SIGNAL WIRE

BETWEEN THE SENSOR AND THE ECU

Unplug Reverse Sensing System ECU and sensor

Yes

Open circuit in wiring loom. Please refer to

Measure resistance of sensor signal wire between sensor connector

schematics section for information on wiring.

and ECU connector.

No

Is resistance = open circuit?

Replace Reverse Sensing System ECU. Retest
for correct operation.

PINPOINT TEST B : SENSOR SHORT CIRCUIT TO VBAT

Test Step

Result / Action to Take

B1

CHECK RESISTANCE BETWEEN SENSOR SIGNAL

WIRE AND SENSOR SUPPLY WIRE

Unplug Reverse Sensing System ECU and sensor. Refer to removal

Yes

and installation section of entry for instructions for accessing module.

Internal short circuit in ECU. Replace Reverse
Sensing System ECU. Retest for correct

Measure resistance between sensor signal wire and sensor supply

operation.

wire

No

Is resistance = open circuit?

Short circuit in wiring loom. Check wiring loom
for short circuit. Please refer to schematics
section for information on wiring.

PINPOINT TEST C : SENSOR POWER SUPPLY SHORT CIRCUIT TO GROUND

Test Step

Result / Action to Take

C1

CHECK SENSOR SUPPLY WIRE

Remove bumper. Refer to Bumper section for instructions for removal

Yes

of bumper

Go to C2

Unplug all 4 sensors.

No

Go to C3

Measure voltage on sensor supply wire.

Is Voltage > 7V?

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413-13-11 Parking

Aid 413-13-11

DIAGNOSIS AND TESTING (Continued)

Test Step

Result / Action to Take

C2

CHECK SENSOR SIGNAL WIRE WITH SENSOR

ATTACHED

Plug in each sensor ( one at a time )

Yes

Internal short circuit in sensor. Replace sensor.

Measure voltage on sensor supply wire.

Retest system for correct operation.

Is voltage < 5V ?

No

Retest for correct operation. If the same Fault is
constantly present, Replace ECU.

C3

CHECK RESISTANCE BETWEEN SENSOR SUPPLY,

SENSOR EARTH WIRE AND VEHICLE GROUND

Unplug Reverse Sensing System ECU and sensor.

Yes

Short circuit in wiring loom. Check wiring loom

Measure resistance between sensor supply wire, and sensor ground

for short circuit. Please refer to schematics

wire and vehicle ground.

section for information on wiring.

Is resistance = short circuit?

No

Go to C4.

C4

CHECK CONTINUITY OF THE SENSOR SUPPLY WIRE

BETWEEN THE SENSOR AND THE ECU

Unplug Reverse Sensing System ECU and sensor.

Yes

Open circuit in wiring loom. Please refer to

Measure resistance of sensor supply wire between sensor connector

schematics section for information on wiring.

and ECU connector.

No

Is resistance = open circuit?

Replace Reverse Sensing System ECU. Retest
for correct operation.

PINPOINT TEST D : RESISTANCE TEST

Test Step

Result / Action to Take

D1

CHECK RESISTANCE BETWEEN SENSOR SIGNAL

WIRE AND SENSOR RETURN WIRE (IE.GROUND)

Unplug connector from Reverse Sensing System ECU. Refer to

Yes

removal and installation section of entry for instructions for accessing

Short circuit in wiring loom. Locate fault and

module.

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

Remove bumper from vehicle. Refer to Bumper section for
instructions for removal of bumper

No

Go to D2

Unplug sensor from wiring loom.

Measure resistance between sensor signal wire and sensor return
(ground) wire or vehicle ground.

Is measured resistance short circuit?

D2

CHECK CONTINUITY OF SENSOR SIGNAL WIRE

Check continuity of sensor signal wire between the Reverse sensing

Yes

system ECU and sensor connectorS.

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

Is there an open circuit in the harness?

information on wiring.

No

Go to C1

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413-13-12 Parking

Aid 413-13-12

DIAGNOSIS AND TESTING (Continued)

PINPOINT TEST E : VOLTAGE TEST

Test Step

Result / Action to Take

E1

MEASURE VOLTAGE OF SENSOR SIGNAL WIRE AT

REVERSE SENSING ECU CONNECTOR

Measure voltage of sensor signal wire at Reverse Sensing ECU

Yes

connector.

Go to E2

Is voltage >7V?

No

Go to E3

E2

CHECK SENSOR SIGNAL WIRE WITH SENSOR

ATTACHED AND OBJECT DETECTED BY SENSOR

Plug in sensor.

Yes

Retest for correct operation. If the same Fault

Measure voltage on sensor signal wire.

Code is constantly present, Replace ECU.

Place your hand in front of the sensor.

No

Does the voltage vary when your hand is placed in front of the

Go to A1

sensor? ( 2V - 8V )

E3

CHECK SENSOR SUPPLY WIRE

Measure voltage on sensor supply wire.

Yes

Go to D1

Is Voltage > 7V

No

Go to C1

PINPOINT TEST F : NO SOUND FROM SPEAKER (BA MODULES ONLY)

Test Step

Result / Action to Take

F1

CHECK SPEAKER SUPPLY WIRE

Measure voltage on speaker supply wire whilst speaker is still

Yes

connected. Refer to removal and installation section of entry for

Go to H1

instructions for accessing module.

No

Is the measured voltage > 9V?

Go to G1

PINPOINT TEST G : NO SOUND FROM SPEAKER — PART 2

Test Step

Result / Action to Take

G1

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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