The Autodiagger AD100+ is a versatile handheld tester designed for diagnosing and testing alternator charging problems. It achieves this by simulating the digital signals typically sent from a vehicle's Engine Control Unit (ECU) to the alternator's voltage regulator. This capability allows the AD100+ to determine if the alternator's voltage regulator can communicate correctly with the vehicle's ECU and if the alternator responds appropriately to the simulated ECU input parameters.

One of the key features of the AD100+ is its flexibility in testing environments. It can be used to test an alternator while it is still installed on a vehicle, which is convenient for quick diagnostics, or on a test bench for more thorough evaluation. This dual-use capability makes it a valuable tool for both automotive technicians and workshops specializing in alternator repair.

The device supports a wide range of regulator testing protocols, making it compatible with numerous vehicle manufacturers. These protocols include COM, LIN, BSS(BSD) for Mercedes, Opel, Audi, BMW, Renault, VW, and Ford; 24V LIN GRC for Mercedes; SIG for Ford, Volvo, and Mazda; P-D for Mazda; L-RVC for GM, Vauxhall, and Opel; and RLO for Toyota. Additionally, with an optional software upgrade, it supports iSTARS Combined Alternator-Starters for PSA vehicles. This broad compatibility ensures that the AD100+ can be used across a diverse fleet of vehicles.

Operating the AD100+ is straightforward. The device powers on automatically once the B+ (positive) and B- (negative) leads are connected. Upon startup, the test subject selection menu appears, allowing the user to choose the desired testing parameter using the up and down arrow buttons, and confirming the selection with a short press of the OK button to enter the testing mode.

Once in testing mode, the display provides crucial information: the voltage of the tested circuit (shown in large digits), the required voltage (in smaller digits at the top of the display), and the alternator load, indicated as DF/DFM (%). The green RC cable and blue M cable are connected to the appropriate pins in the voltage regulator's socket. It's noted that some regulators might require additional signals, typically B+, connected via a separate cable for correct operation. When testing in COM mode, the blue M cable can be left disconnected.

During the testing process, the up and down buttons are used to change the required voltage value. Users are instructed to observe whether altering the required voltage results in a corresponding change in the alternator/regulator output and if the DFM reading accurately reflects the current state. To exit the testing mode and return to the main selection menu, the OK button must be pressed and held.

The AD100+ also boasts modern update capabilities. It can be updated wirelessly via NFC (Near Field Communication) using a compatible Android mobile phone. Alternatively, the device can be returned to Wood Auto for the update procedure. This ensures that the tester remains up-to-date with the latest protocols and features. The update process is designed to be safe, with the device retaining both the new and previous software versions for easy rollback if needed. To view the device's unique serial number and current software version, which are required for updates, the user powers on the device, presses the up arrow and OK buttons simultaneously while in the main menu, and holds them until the update menu appears.

Maintenance of the AD100+ is minimal. The device is designed to be resistant to common connection errors and typical voltage ranges, reducing the risk of damage from improper hook-up. It is also designed not to directly damage connected units, although testing an alternator without removing it from the vehicle, especially with voltages exceeding 15V, could potentially lead to electrical system errors. Selecting an incorrect testing function will generally only result in a lack of response from the alternator, rather than causing damage.

For storage, the AD100+ should be kept in a warm, dry environment. Cleaning the enclosure involves using a soft, moist cloth with a mild detergent, avoiding harsh chemicals like naphtha, paint thinners, or solvents, which could damage the display or coating. The device can be mounted on a test table, provided it's done without drilling holes or inserting screws into the enclosure.

The AD100+ is designed to work with connection wires up to 5 meters long and is compatible with 24V systems. If the display does not illuminate or show the main menu after connection, users are advised to check the connections, verify the system voltage, and ensure continuity of the wires. A common observation is that alternators with a COM interface may only start working after the required voltage is changed for the first time; this is normal behavior and indicates the alternator is functioning correctly. Similarly, if the device displays an error in COM mode when the alternator stops revolving, it's typically a "lack of revolutions" error, which is standard for digitally controlled voltage regulators and disappears once the rotor spins again, confirming proper operation. The device is not designed to test alternators with F1-F2 connectors, as these require an external voltage regulator and a different testing methodology.

AUTODIAGGER AD100+ - General Motors L-RVC Testing: Connector and Connection; Connector for GM L-RVC Testing; Alternator Connection for GM L-RVC

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