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
G56521 en