B2201

Code

Other B — Body

No Communication With Traffic MasterModule

Brand: Other

Type: B — Body

Views: UK: 39 EN: 58 RU: 40

AI status

Completed

ready

Completed 100%

Page language: EN

Causes

Blown fuse or loss of module supply/ground
Poor or corroded connector(s) at the Traffic Master Module
Damaged or shorted data bus wiring (CAN/LIN) between modules
Missing or incorrect bus termination
Module software/firmware fault or module not configured
Intermittent network interference from aftermarket devices

Symptoms

Vehicle display or infotainment traffic data unavailable
Warning or information messages about traffic/communication loss
Other networked systems exhibiting reduced functionality
No response from the Traffic Master Module when queried with a scan tool
Intermittent operation of features controlled by the module

What to check

Verify battery voltage and key-on power (12V nominal) at vehicle battery
Check related fuses and power/ground at the Traffic Master Module
Use a scan tool to attempt to communicate with the Traffic Master Module and read other network modules
Visually inspect module connectors and wiring for corrosion, damage, or water intrusion
Check if other modules on the same bus are communicating normally
Measure CAN/LIN bus voltages and termination resistance with ignition on

Signal parameters

Module supply voltage: nominal 12V (approx. 11–14V depending on charging system)
CAN bus idle voltages (typical): CAN High ≈ 2.5V, CAN Low ≈ 2.5V; dominant state CAN H ≈ 3.5V, CAN L ≈ 1.5V
CAN bus termination resistance: ≈ 60 ohms measured across CAN H and CAN L (two 120 Ω in parallel)
LIN bus: single-wire idle ≈ battery voltage; dominant low when driven (verify against vehicle spec)
Expected diagnostic response: module should respond to OBD/diagnostic requests when present on network

Diagnostic algorithm

Confirm code presence and freeze-frame data with a capable scan tool. Note any concurrent network codes.
Attempt to communicate with the Traffic Master Module via scan tool. If no response, try waking the vehicle (cycle ignition) and retry.
Inspect fuses related to the module and verify proper power and ground at the module connector with ignition on.
Visually inspect the module connector and wiring harness for corrosion, bent pins, water damage, or loose terminals. Repair as needed.
With ignition on, measure supply, ground, and data line voltages at the module connector. Compare to expected signal parameters.
Check CAN/LIN bus continuity and termination resistance. If termination is incorrect or bus shorted to battery/ground, repair wiring.
Use a scope or CAN diagnostic tool to observe bus activity while attempting communication. Look for collisions, noise, or a missing node.
Isolate the module by disconnecting suspect modules or aftermarket devices to identify network conflicts.
If wiring and power/ground are good and bus signals active but no module response, consider reprogramming or replacement of the Traffic Master Module per manufacturer procedure.
After repairs or module replacement, clear codes, re-initialize/reprogram modules if required, and verify communication and proper function on road/test.

Likely causes

Battery or ignition feed fuse for the module open
Bad ground connection at module chassis ground
Open or shorted CAN high/low or LIN single-wire between gateway and module
Traffic Master Module failed or in a non-responsive state
Gateway/module address conflict or programming error

Fault status

⚠️ Status

No communication with Traffic Master Module — the module did not respond to network diagnostic requests. Check power, ground, connectors, and the vehicle data bus.

🟡 Repair difficulty: Medium

⏱️ Diagnostic time: 1.0-2.5 hours