Jaltest (JDC505A) | CAT/Perkins 9-pins OBD - 16-pins OBD2 Adapter Cable | Internal combustion engine
Warranty directly via AsTools
Warranty directly via AsTools
We handle warranty cases ourselves, quickly and without involving the manufacturer. Thanks to our own parts inventory and technical expertise, we can usually assist you immediately. Only in exceptional cases do we still send the product to the supplier.
2 years warranty on all products
2 years warranty on all products
All our products come with a 2-year factory warranty. This ensures you long-lasting quality and service.
Easy returns
Easy returns
You can easily request your return through your account. We will send you the return label by email. Return shipping costs are your responsibility.
Professional customer service
Professional customer service
Our experts are ready to help you quickly and professionally, both online and in our physical store. Questions? Feel free to contact us!
The Jaltest JDC505A provides the connection between the 9-pin diagnostic connector on Caterpillar and Perkins engines and the 16-pin OBD2-socket of your Jaltest diagnostic cable. On the engine side, a round bayonet connector features a black housing, a light grey coupling ring and distinctive reddish-brown internals containing nine female pins: eight arranged in a circle and one at the centre. Caterpillar and Perkins use the same connector, allowing a single cable to serve both engine manufacturers. The cable measures 28 to 30 cm in length.
This adapter routes engine communication lines to the Jaltest Link. This gives your diagnostic equipment access to proprietary data lines — CDL for Caterpillar and PDL for Perkins — as well as the open J1939-bus, the legacy SAE J1708-line and the EMCP-controller for power generation. The proprietary line is what delivers meaningful diagnostics: Caterpillar engine J1939 control units have no functions listed in the coverage table. The cable is covered under Jaltest AGV (agricultural), Jaltest OHW (construction and off-road equipment) and Jaltest Marine (marine vessels).
KEY BENEFITS
IMPORTANT NOTES
Applications and functionality
Through this connection, you access the engine control units of Caterpillar and Perkins using Jaltest software. Jaltest identifies the control units by engine type and data line — what you get varies significantly depending on the unit. The units listed below are from the CAT and Perkins coverage.
Control units you can access
- CDL, engine control (Caterpillar): The Caterpillar Data Link — the manufacturer's proprietary diagnostic line where the useful functions are located.
- PDL, engine control (Perkins): Perkins Data Link, the equivalent for Perkins engines.
- J1939, engine management: The open bus protocol. Perkins engines include functions in the coverage; Caterpillar engines do not.
- SAE J1708, engine control system: The older serial line protocol, found on Caterpillar 3406 among others.
- EMCP, power generation: The control unit for power generation on stationary Caterpillar engines.
What you can do
- Read and clear fault codes: Access the fault memory of the control unit with fault descriptions, and clear it after repair.
- View live data: Monitor current sensor values on the control unit, with the ability to set alarm thresholds for out-of-range readings.
- Maintenance: Check engine service intervals and record associated work in a report. Available only on some Perkins control units, such as the 1206E on J1939.
- Coverage varies by unit: The coverage table differs by engine type and data protocol.
Compatible vehicles and applications
The engine type determines compatibility, not the machine. This cable fits any Caterpillar or Perkins engine with the 9-pin connector; these engines are fitted by dozens of equipment manufacturers. Jaltest covers the following series below; the reddish-brown wiring inside the connector indicates whether your engine has this connection type.
Caterpillar and Perkins:
- Caterpillar 3000 series: 3054, 3054B, 3056, 3126, 3126B, 3176, 3176C, 3196, 3406, 3406E, 3408, 3408E, 3412, 3412E and 3456
- Caterpillar 3500 and 3600 series: 3508, 3512, 3516 and variants B, C and E, plus 3606, 3608, 3612 and 3616
- Caterpillar C and G series: The C-series engines and gas engines from the G-range
- Perkins compact: 402D, 403D, 403F, 403J, 404D, 404F, 404J, 854E, 854F, 904D and 904J
- Perkins 1100 and 1200 series: 1103C/D, 1104A/C/D, 1106D, 1204E/F/J, 1206E/F/J and 1706J
- Perkins heavy-duty: 1306, 1506, 1506D, 2006, 2206, 2306, 2506, 2806, 3008 and 3012
Package contents
- 1x Jaltest (JDC505A) | CAT/Perkins 9-pin OBD - 16-pin OBD2 Adapter Cable | Internal Combustion Engine
Technical specifications
| Specification | Description |
|---|---|
| Brand | Jaltest (Cojali) |
| Reference number | JDC505A |
| Type | Adapter cable |
| Application | CAT and Perkins engines with 9-pin diagnostic connector |
| Length | 28 - 30 cm |
| Interface | Jaltest Link V8.1/V9 |
| Machine-side connector | 9-pin round bayonet plug with grey coupling ring and reddish-brown interior, female |
| Interface-side connector | 16-pin OBD2 |
| Control units | CDL (Caterpillar), PDL (Perkins), J1939, SAE J1708 and EMCP |
| Segment | Internal combustion engine |
| Jaltest module | Jaltest AGV (agriculture), Jaltest OHW (construction and earthmoving equipment) and Jaltest Marine (vessels) |
| Part of cable set | AGV cable set (70002003), OHW complete cable set (70002026), OHW basic cable set (70002030) and Marine stationary engine cable set (70002006) |

To ensure you always have access to the latest software updates and releases for your Jaltest device, it's important that you register the correct distributor.
Only the authorized distributor can perform new software installations and updates. When you designate us as your distributor, we can handle this for you and guarantee that your device stays current and runs smoothly.
How does it work?
-
Download and complete the change form
You can find the form as a PDF file here. -
Send us the completed form
You can easily do this by email to support@astools.eu. -
We'll take care of the rest
With the form, we can notify Jaltest of the change and officially register you as our customer.






