Carrier diagnostics cable (Trailer)

Jaltest Carrier Diagnostics Cable (Trailer) — JDC115.9

The Jaltest JDC115.9 is the dedicated diagnostic cable for Carrier Transicold refrigeration units on trailers. At $130, this genuine Cojali cable connects your Jaltest Link diagnostic interface to Carrier refrigeration systems, enabling diagnostic access through the Jaltest Diagnostics software for fault codes, live data, and system tests on Carrier-equipped refrigerated trailers.

Carrier Transicold and Thermo King together account for the vast majority of refrigerated trailer units in North American fleets. If your shop handles reefer trailers, you need a cable for Carrier — this is it. The JDC121A9 (Carrier CAN diagnostics cable) covers the CAN bus variant; this JDC115.9 covers the standard serial/legacy Carrier connection.

Cable Details

• Part number: JDC115.9
• Application: Carrier Transicold trailer refrigeration units (serial/standard connection)
• Version: V9 — for use with Jaltest Link V9
• Manufacturer: Cojali (Jaltest)
• Genuine OEM part

JDC115.9 vs JDC121A9 — Which Carrier Cable Do You Need?

Jaltest offers two Carrier diagnostic cables for trailers, and understanding the difference matters:

• JDC115.9 — Carrier diagnostics cable ($130) — this cable — for Carrier units using the standard serial diagnostic interface
• JDC121A9 — Carrier CAN diagnostics cable ($90) — for newer Carrier units using the CAN (Controller Area Network) bus interface

If you service a mixed fleet of Carrier units — older models with serial connections and newer models with CAN — you may need both cables. Call us if you are not sure which connection type your specific Carrier units use.

Diagnostic Capabilities with Jaltest + JDC115.9

When connected to a Carrier refrigeration unit via this cable and the Jaltest Diagnostics software:

• Fault code reading and clearing — access Carrier-specific DTCs
• Live data monitoring — real-time refrigeration system parameters: temperatures, pressures, operational status
• System tests — function tests and system checks through the Jaltest interface
• Performance diagnostics — identify refrigeration performance issues and component faults

Who Needs This Cable

• Reefer trailer repair shops — Carrier is one of the two dominant brands you will see constantly
• Fleet maintenance operations running Carrier-equipped refrigerated trailers — in-house diagnostics cuts dealer dependency
• Trucking companies with temperature-controlled fleets — reefer downtime is costly; faster diagnosis means faster repairs
• Shops building out trailer refrigeration diagnostic capability alongside a Jaltest CV or Trailer kit

Compatible Jaltest Systems

• Requires Jaltest Diagnostics software with trailer coverage (Jaltest CV Kit part 29209, or Jaltest Trailer Kit part 78901081, $1,595)
• Compatible with Jaltest Link V9 hardware

Why Buy From OEM Diagnostic Tools?

Jaltest specialist since 2016. We can help you determine whether you need JDC115.9, JDC121A9, or both for your specific Carrier fleet. Free shipping, free tech support at 866-217-0063, full manufacturer warranty.

Call 866-217-0063 for quick answers and help!