1) With the vehicle elevated, attach the clamps to the suspect areas. If, for example, you suspect
there is a bad wheel bearing, attach the clamps, one each, per wheel bearing. Put the clamp on
the tie rod or knuckle close to the inside of the wheel. In order to generate an exact
cross-comparison of sounds, place the clamp on identical opposite locations. With the availability
of two more channels, you could place transmitters on the transmission and differential, since
many times what you think is a wheel bearing turns out to be something different. Or, if you
suspect a brake problem, attach the 4 clampsadjacent to the brakes.
The closer the clamp is
positioned to the suspected problem, the better sound reproduction you will get.
2) Be sure the transmitters are securely fastened to the locations chosen.
Each Transmitter has 3 methods of attachment:
1) First, there are two internal magnets so that the transmitter can hold to a metal surface.
2) Second, there is a velcro strap that can be wrapped around any non-moving part.
3) Third, there is a spring-loaded clamp that can grab onto non-moving parts.
Be sure each transmitter is securely held in place with one of these methods to avoid loss of
Transmitter from excessive bumps or shaking during road test.
Also, carefully check for clearance of all vehicle parts that are located close to the transmitters
to avoid contact/damage from movement or heat.
INSTRUCTIONS FOR USE
3) Using the location identifier note pad, record information on note pad of the location and
corresponding channel for each mircrophone/clamp. This will allow you to properly assign the
problem noise to the proper malfunctioning part while conducting the road test.
4) It is highly recommended that if earphones are used during diagnoses (there is a earphone jack
available on the receiver), that there be a separate driver for the vehicle.
CAUTION:
It is against many state laws to operate a motor vehicle while wearing earphones.
IMPORTANT:
Make notes while driving (being cautious) as to what is heard on each channel
(rattles, squeaks, grinding, whining, etc.). When you have returned to the shop, you
can then zero in on the exact location of the noise/problem.
It is quick and easy to hook up the Wireless ChassisEAR
™
clamps on the fuel injectors. The
“tapping” solenoids are easily heard. If a clear metal-to-metal “ringing” sound is heard, then the
injector is clean. If the “needle” inside the solenoid is making a dull “thud”, then a deposit buildup
more than likely exists inside the injector. A cleaning of the injectors is suggested. It is important to
listen to the injectors before and after cleaning in case one is still dirty after cleaning.
FUEL INJECTORS
5) Before conducting the road test, turn on the on/off-volume control switch located on the front of the
Wireless ChassisEAR
™
receiver. Select the first channel and adjust the volume to the desired
level. Various volume levels may reveal different sounds and problems. Initially make a mental
note of the sounds you hear as you listen. Next, push each channel according to the location and
make notes accordingly. You may make instant cross comparisons of two locations, for example,
channels #2 and #4, just by pushing the channel indicators in an alternating manner.
NOTE:
This equipment has been tested and found to comply with the limits for a Class B digital
device, pursuant to part 15 of the FCC Rules. These limits are designed to provide reasonable
protection against harmful interference in a residential installation. This equipment generates,
uses and can radiate radio frequency energy and, if not installed and used in accordance with the
instructions, may cause harmful interference to radio communications. However, there is no
guarantee that interference will not occur in a particular installation. If this equipment does cause
harmful interference to radio or television reception, which can be determined by turning the
equipment off and on, the user is encouraged to try to correct the interference by one or more of
the following measures:
- Reorient or relocate the receiving antenna.
- Increase the separation between the equipment and receiver.
- Connect the equipment into an outlet on a circuit different from that to
which the receiver is connected.
- Consult the dealer or an experienced Radio/TV Technician for help.
FCC INFORMATION - CLASS "B" DEVICE
2
3
Receiver Unit (Rx)
Transmitter Units (Tx) - Channels 1-4
(Channels 5-6 optional - not shipped with kit)
Cable Leads / Clamps - For all Channels
Earphones
Velcro Straps
Nylon Straps
AAA Batteries (Tx) 4 per Unit
AA Batteries (Rx) 6 per Unit
Blow Molded Case
Vinyl Pouch
Location Identifier Note Pad (25 sheets per pad)
Instruction Manual / Warranty Card
1
4
4
1
12
12
16
6
1
1
1
1
KIT CONTENTS
Some of these vehicle parts/areas include:
1. Wheel Bearings
2. Brake Calipers
3. C.V. Joints
4. Leaf and Coil Springs
5. Differentials
6. Transmissions
7. Body Squeaks and Rattles
8. Under the Dash
9. Fuel Injectors
10. Alternators
11. Water Pumps
12. Smog Pumps
13. Power Steering Pumps
14. AC Compressors
15. Industrial Equipment
NOTE:
Changes or modifications to this equipment not expressly approved by Matco Tools
®
could
void the user's authority to operate this equipment.
Matco Tools
®
Wireless ChassisEAR
™
is a versatile electronic listening tool which is designed to allow
the user to listen to amplified sounds through a speaker or earphones DURING a road test.
During a road test under load, these parts make different sounds than when the car is on a hoist. In
order to accurately diagnose an under car problem, the car must be driven during diagnoses so that
all parts and bearings are under full load and actual driving conditions.
Before using the Wireless ChassisEAR
™
for the first time, please review the components.
NOTE:
Only Cable Leads/Clamps supplied with this equipment must be used. It is the responsibility
of the user to use only the accessories supplied with this equipment.
There are up to 6 extremely sensitive microphones/clamps that can be attached adjacent to many
difficult to diagnose vehicle parts. (see under "How to Use")
