Land Rover Discovery: Parking Aid / Diagnosis and Testing
PRINCIPLES OF OPERATION
For a detailed description of the Parking Aid system, refer to the relevant
Description and Operation section in the workshop manual. REFER to:
Parking Aid (413-13 Parking Aid, Description and Operation).
INSPECTION AND VERIFICATION
CAUTION:
Diagnosis by substitution from a donor vehicle is NOT acceptable.
Substitution of control modules does not guarantee confirmation of a
fault, and may also cause additional faults in the vehicle being tested
and/or the donor vehicle.
NOTES:
- Verify the customer concern
- Visually inspect for obvious signs of damage and system integrity
Visual Inspection
![Visual Inspection](images/books/227/index31(4).jpg)
- If an obvious cause for an observed or reported concern is found,
correct the cause (if possible) before proceeding to the next step
- If the cause is not visually evident, verify the symptom and refer to
the
Symptom Chart, alternatively check for Diagnostic Trouble Codes
(DTCs) and refer to the DTC Index
- Check DDW for open campaigns. Refer to the corresponding bulletins
and SSMs which may be valid for the specific customer complaint and
carry out the recommendations as required
SYMPTOM CHART
CAUTION:
Do not apply any grease based products to any parking aid system
connector or terminals.
NOTES:
- Please note if this diagnosis is being carried out on a vehicle
without a hard wired parking aid speaker, ensure the in car
infotainment system is fully functional and configured correctly.
- Parking aid sensors that are painted incorrectly and not to the
manufacturer standards, will not be considered in any warranty
claim.
![SYMPTOM CHART](images/books/227/index32(4).jpg)
![SYMPTOM CHART](images/books/227/index33(4).jpg)
![SYMPTOM CHART](images/books/227/index34(4).jpg)
![SYMPTOM CHART](images/books/227/index35(4).jpg)
SYMPTOM:
Parking aid
system not
functioning
correctly (no
DTCs set)
POSSIBLE CAUSE:
- Front/rear parking
aid sensor(s) dirty
- Front/rear parking
aid sensor
positions incorrect
- Front/rear parking
aid sensor(s) incorrectly
installed
- Front/rear parking
aid sensor
coupling rings not
installed or
incorrectly
installed
- Parking aid
sensors painted
without being
removed from the
bumper assembly
or not painted to
the manufacturer
specification
ACTION:
- Clean the front and rear parking aid sensors
- Check the front and rear parking aid sensor
positions
- Check the installation of the front and rear
parking aid sensors
- Check the installation of the front and rear
parking aid sensor coupling rings
- Remove parking aid sensor and ensure
correctly painted parking aid sensor is
installed
- Parking aid sensors that are painted
incorrectly and not to the manufacturer
standards, will not be considered in any
warranty claim
SYMPTOM:
Parking aid
system not
functioning
correctly (no
DTCs set) -
System
characteristics or
environmental
effects
POSSIBLE CAUSE:
ACTION:
- Ensure the sensors are a tight fit in the
holder and locked. Ensure the sensors are
central in the holder and bumper and at the
correct angle
- Ensure vehicle ride height is within the
specified limits. Rectify as required
- Clean the sensor face as required. Defrost
the sensor and dry as required. Clear any
debris from the sensor and holder as
required. Water flowing over the sensor is a
system limitation. (no action required)
- Check for non standard, bumper,
exhausts/tailpipe, tow bar or external spare
wheel mounting that may be being
detected by the parking aid system. Rectify
as required
- Ensure the area around the vehicle is clear
of any obstacles, move the vehicle to a
suitable area before continuing diagnosis
- Ensure no exhaust gas or warm area clouds
are in the area around the parking aid
sensor detection range
- Ensure the vehicle is on level ground and
clear of any ramps, potholes or speed
bumps, move the vehicle to a suitable area
before continuing diagnosis
- Remove parking aid sensor and ensure
correctly painted parking aid sensor is
installed
- Parking aid sensors that are painted
incorrectly and not to the manufacturer standards, will not be considered in
any
warranty claim
SYMPTOM:
Parking aid
sensors are
being returned
with no faults
found or signs of
water
ingress/corrosion
POSSIBLE CAUSE:
- Possible issue
with sensor
connectors not
latched correctly
ACTION:
- When either no/intermittent operation has
been reported the following action should
be taken
- 1. Using Datalogger, identify the position of
the suspect parking aid sensor within the
bumper
- 2. Visually locate the position of the suspect
parking aid sensor. Inspect and provide
details in claim if the sensor has any sign of
physical damage
- 3. Remove the bumper. Disconnect the
wiring at the main harness connector.
Inspect the main harness connectors and
terminals for signs of damage, backed out
pins, corrosion and water ingress, or
damage to the seals. Provide details in
claim if any of the above symptoms are
present
- 4. Attempt to remove the harness
connector from the suspect parking aid
sensor without using the connector latch i.e.
lightly pull back on ALL wires together,
ensuring the harness is held close to the
back of the connector, not elsewhere on the
wiring harness. DO NOT apply excessive
force. If the connector can be removed
without using the latch, provide details in
claim if connector is loose. If the connector
is fully latched, disconnect it from the
sensor
- 5. Inspect and provide details in claim if the
suspect sensor harness connector has any
sign of water ingress/corrosion
- 6. Inspect and provide details in claim if the
suspect parking aid sensor harness connector shows any sign that the
terminals
have backed-out of the connector or for any
damage to the terminal seals.
Replace/repair the harness as required and
proceed
- 7. Remove the suspect parking aid sensor
from the bumper. Inspect the parking aid
sensor connector for signs of water
ingress/corrosion. Provide details in claim if
corrosion/water ingress is present
- 8. Exchange the suspect parking aid sensor
with another parking aid sensor within the
bumper that is performing correctly.
Reconnect all sensors and reconnect the
bumper main harness connector. Repeat
step 1. Confirm if the original fault now
appears at the new position of the suspect
parking aid sensor, if so, proceed to step 10
- 9. If not, carry out the appropriate open
circuit and short circuit checks between the
original suspect parking aid sensor harness
connector and the parking aid control
module
- 10. Refit the parking aid sensors to their
original position in the bumper
- 11. Reconnect the parking aid sensor to the
bumper harness connector. Reconnect main
harness connector and refit the bumper
- 12. Repeat Step 1. If fault is still present,
replace only the faulty sensor
PARKING AID SYSTEM ON - BOARD SELF - TEST
As part of the strategy of the system if any DTCs are detected, a long
highpitched
tone approx 3 seconds will sound and the parking aid switch (where
fitted) indicator LED will flash 6 times at ignition on
- If a fault is present when the parking aid system is activated then the
parking aid switch (where fitted) status LED will flash 6 times indicating
an
issue with front or rear parking aid sensors, wiring switch, parking aid
control module or hard wired sounders
- The rear parking aid sounder/rear audio system will emit an error tone
for
approx 3 seconds at ignition on if a fault is detected with the front or
rear
sensors, the switch, or if there is a controller area network (CAN) bus
error
- (Only applicable to vehicles fitted with front parking aid and a hard
wired
rear parking aid sounder). If there is a fault with the rear parking aid
sounder the error tone will come from the front parking aid sounder unit
(integral with the instrument cluster)
Audible and Visual Warnings when Parking Aid System is in Error State
![Audible and Visual Warnings when Parking Aid System is in Error State](images/books/227/index36(4).jpg)
PINPOINT TESTS
![PINPOINT TESTS](images/books/227/index37(4).jpg)
![PINPOINT TESTS](images/books/227/index38(4).jpg)
![PINPOINT TESTS](images/books/227/index39(3).jpg)
![PINPOINT TESTS](images/books/227/index310(4).jpg)
![PINPOINT TESTS](images/books/227/index311(4).jpg)
DTC INDEX
For a list of Diagnostic Trouble Codes (DTCs) that could be logged on this
vehicle, please refer to Section 100-00. REFER to: Diagnostic Trouble Code
Index - DTC: Parking Aid Control Module (PACM) (100-00 General
Information, Description and Operation).
READ NEXT:
PRINCIPLES OF OPERATION
For a detailed description of the rear view camera system, refer to the
relevant Description and Operation section of the workshop manual.
INSPECTION AND VERIFICATION
CAUTION:
REMOVAL
NOTES:
Removal steps in this procedure may contain installation details.
Left illustration shown, Right is similar.
Disconnect the battery ground cable.
Refer to: Specifications (414-01 B
SEE MORE:
COMPONENT LOCATION
TV antenna amplifier/Fuel Fired Booster Heater (FFBH)
receiver
Frequency Modulation (FM) antenna amplifier
Television (TV) antenna amplifier
Amplitude Modulation (AM)/Frequency Modulation (FM)
antenna amplifier
Wireless headphones
Rear Seat Entertainment (RSE) screen
REMOVAL
NOTES:
This procedure contains some variation in the illustrations
depending on the vehicle specification, but the essential
information is always correct.
This procedure contains illustrations showing certain components
removed to provide extra clarity.
Raise and support the vehicle