Diablo Controls AVI-CR Vehicle Transmitter Code Reading and Diagnostic Details
The Diablo Controls AVI-CR is a portable Automatic Vehicle Identification code reader designed for technicians, access-control installers, fleet managers, emergency vehicle departments, transit operations, and other users who need to verify the operation and programmed code of an AVI vehicle transmitter.
Instead of driving the vehicle across a known working AVI entrance every time a transmitter needs to be checked, the AVI-CR allows the transmitter to be tested directly at the vehicle. Its handheld display identifies the AVI code being transmitted and can recognize up to four different codes from the same transmitter.
What the AVI-CR Does
The AVI-CR receives the coded signal generated by a compatible AVI vehicle transmitter and displays the transmitted code on its LCD. This allows a technician to confirm both that the transmitter is operating and that it is sending the expected AVI code.
- Verifies operation of installed AVI vehicle transmitters.
- Displays the actual AVI code received from the transmitter.
- Reads up to four different codes from one transmitter.
- Shows how many consecutive times each code was received.
- Provides an audible indication when a new code is detected.
- Displays real-time 9V battery voltage.
- Can be used with the included sensing wand or as a handheld reader by itself.
Multiple-Code Transmitter Testing
The AVI-CR can receive up to four codes from one transmitter during the same test. This is particularly useful when checking multi-code transmitters or installations where a transmitter changes codes based on an external switch or vehicle function.
For reliable identification, Diablo specifies that each code must be transmitted a minimum of three consecutive times before changing to another code. The reader shows a reception count for each detected code so the technician can verify how the transmitter is cycling through its programmed codes.
Extendable Sensing Wand
The included sensing wand is useful because AVI transmitters are often permanently mounted to a vehicle and may be located behind a bumper, underneath the vehicle, or in another difficult-to-reach location. The wand extends so the sensing head can be positioned closer to the transmitter without requiring the technician to crawl underneath the vehicle.
- Extendable shaft for reaching installed transmitters.
- Adjustable sensing head for proper orientation.
- Sensing head rotates approximately 90 degrees for compact storage.
- Connects to the display unit through the supplied coiled modular cord.
Using the AVI-CR Without the Wand
The handheld display unit can also read a transmitter without the sensing wand. Diablo instructs the user to position the display unit approximately 1 to 2 ft from an operating transmitter. Actual read distance depends on transmitter location and the orientation of the reader relative to the transmitter.
For weak or inconsistent reception, the sensing coil should be positioned parallel to the transmitter whenever practical.
Features and Specifications
| Specification | Details |
| Brand | Diablo Controls |
| Model | AVI-CR |
| Product Type | Handheld Automatic Vehicle Identification code reader |
| Primary Function | Verify AVI transmitter operation and transmitted code |
| Possible AVI Codes | 19,683 |
| Simultaneous Codes Read | Up to 4 from one transmitter |
| Display | High-contrast LCD with white text on blue background |
| Audible Indication | Two beeps when a new code is received |
| Power | Replaceable standard 9V battery |
| Battery Monitoring | Real-time voltage displayed on screen |
| Low Battery Indication | Low-battery message below approximately 6V |
| Power Button | Momentary press-and-hold operation |
| Sensing Wand | Extendable and adjustable, included |
| Wand Cord | Coiled modular telephone-handset-style cord |
| Approximate Wandless Read Distance | Approximately 1 to 2 ft depending on transmitter and orientation |
| Operating Temperature | 32 F to 176 F |
| Display Unit Dimensions | Approximately 8.50 in L x 4.45 in W x 1.50 in D |
| Display Unit Weight | Approximately 13.3 oz including battery |
Code Display Information
The AVI-CR display provides more information than simply showing whether a transmitter is active. During a test, the screen can show:
- First AVI code received
- Second AVI code received
- Third AVI code received
- Fourth AVI code received
- Consecutive reception count for each code
- Total number of read attempts
- Real-time 9V battery voltage
If only one AVI code is continuously received, the display's consecutive reception counter is designed to reach its programmed display limit rather than continuing indefinitely.
Compatible AVI Transmitter Systems
Diablo Controls specifically states that the AVI-CR is compatible with existing AVI systems from Detector Systems, IDC, US Traffic, and Reno A&E. It is also intended for checking transmitters within Diablo Controls' own AVI product family.
Current Diablo AVI-X transmitters operate within the same 19,683-code AVI system. AVI-X-1 is a single-code transmitter, while AVI-X-2 provides dual-code operation for applications requiring an alternate transmitted code.
Do not assume the AVI-CR can read every type of vehicle identification transmitter. RFID windshield tags, UHF credentials, conventional gate remotes, Bluetooth credentials, barcode decals, and other vehicle access technologies use different communication methods and are not automatically compatible.
AVI-CR vs. AVI-40 Receiver
- AVI-CR: Portable diagnostic reader used to identify and verify the AVI code transmitted by a vehicle.
- AVI-40: Installed access-control receiver that recognizes programmed AVI codes from a roadway sensing loop and provides an electronic output to compatible control equipment.
The AVI-CR does not provide the gate-opening output of an AVI-40. Its purpose is transmitter testing and code identification.
AVI-CR vs. AVI-222 Receiver
The AVI-222 is an installed two-channel AVI receiver capable of identifying the full AVI code range through roadway sensing loops. The AVI-CR is a handheld service tool. These products serve different functions and should not be substituted for one another.
Testing a Vehicle-Mounted Transmitter
To test an installed transmitter, connect the sensing wand to the display unit with the supplied coiled cord, extend the wand as needed, and position the sensing head close to the transmitter. The sensing head should be oriented as close to parallel with the transmitter as practical for good reception.
Press and hold the red power/read button while checking the transmitter. If a valid AVI transmission is received, the code appears on the display and the reader gives an audible indication.
If the expected code does not appear, verify that the transmitter is powered, confirm any vehicle ignition or emergency-light circuit used to activate the transmitter, and compare reception with a known-good transmitter before assuming the AVI receiver or gate operator has failed.
Package Contents
Diablo Controls identifies the AVI-CR as being supplied with four primary items:
- AVI-CR handheld display unit
- Extendable sensing wand
- Coiled connecting cord
- 9V battery
Not Intended For
- Permanent installation as an AVI gate receiver
- Directly opening or closing a gate operator
- Replacing the Diablo AVI-40 or AVI-222 receiver
- Reading standard gate remote controls
- Reading UHF RFID windshield tags or hang tags
- Reading proximity cards or standard access-control credentials
- Replacing a roadway inductive vehicle detector
Before Ordering Checklist
- Confirm the required model is Diablo Controls AVI-CR.
- Confirm the equipment being tested is an AVI vehicle transmitter.
- Verify the transmitter belongs to a compatible AVI code family.
- Do not order the AVI-CR when an installed AVI access-control receiver is actually required.
- Confirm the application requires code identification rather than gate relay control.
- Verify the display unit, sensing wand, coiled cord, and 9V battery are included with the current package.
- If testing a multi-code transmitter, determine which primary and alternate codes are expected before troubleshooting.
Technician Note
The AVI-CR is particularly useful when an AVI-controlled entrance stops recognizing one vehicle while other vehicles continue to work normally. Testing the affected vehicle first can determine whether the transmitter is powered and which code it is actually sending before replacing a roadway loop, AVI receiver, or gate-control component.
If the AVI-CR reads the expected code reliably but the entrance still does not respond, continue diagnosis at the roadway sensing loop, installed AVI receiver, receiver programming, output interface, and gate or barrier controller.
Product Questions and Answers
What does the Diablo Controls AVI-CR test?
The AVI-CR tests compatible Automatic Vehicle Identification transmitters. It verifies that the transmitter is operating and displays the AVI code or codes the transmitter is sending.
How many AVI codes can the AVI-CR read from one transmitter?
The AVI-CR can receive and display up to four different codes from the same transmitter. It also displays the consecutive reception count for each code.
Does the AVI-CR include the extendable sensing wand?
Yes. Diablo identifies the package as including the handheld display unit, extendable sensing wand, coiled connecting cord, and 9V battery.
Can the AVI-CR be used without the sensing wand?
Yes. The handheld display unit can be used by itself. Diablo recommends positioning it approximately 1 to 2 ft from an operating transmitter, with actual reading distance depending on transmitter location and orientation.
Does the AVI-CR open a gate like an AVI-40 receiver?
No. The AVI-CR is a diagnostic code reader and does not replace an installed AVI-40 or AVI-222 access-control receiver. It identifies transmitter codes but does not provide a gate-opening output.
What battery does the Diablo AVI-CR use?
The AVI-CR uses a standard replaceable 9V battery. The reader displays battery voltage on screen and provides a low-battery indication when voltage drops below approximately 6V.
Can the AVI-CR read transmitters from older AVI manufacturers?
Diablo specifically identifies compatibility with existing AVI systems from Detector Systems, IDC, US Traffic, and Reno A&E. Confirm the exact transmitter family before assuming compatibility with other vehicle identification technologies.
What should I check if the AVI-CR does not read a vehicle transmitter?
Confirm that the transmitter is powered and operating, position the sensing coil close to and parallel with the transmitter, check the AVI-CR battery, and compare operation with a known-good transmitter when available. If the transmitter still cannot be read, further transmitter or vehicle wiring diagnosis may be required.
