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P1705 – BMW DTC

BMW DTC P1705 – Transmission Control Module LED Output Open Circuit

DTC P1705 meaning on BMW

DTC P1705 on a BMW indicates a Transmission Control Module (TCM) LED Output Open Circuit. This means that there is an issue with the communication between the TCM and the LED output circuit, resulting in a malfunction.

BMW DTC P1705 symptoms

Symptoms of DTC P1705 on a BMW may include:

  • Check Engine Light illuminated
  • Transmission shifting issues
  • Loss of communication with the TCM

BMW DTC P1705 causes

Common causes of DTC P1705 on a BMW include:

  • Faulty TCM
  • Open circuit in the LED output wiring
  • Corrosion or poor connections in the circuit

BMW DTC P1705 seriousness

DTC P1705 should be addressed promptly as it can lead to transmission issues and affect the overall performance of the vehicle. Ignoring this fault may result in further damage to the transmission system.

How to diagnose DTC P1705 on BMW

To diagnose DTC P1705 on a BMW, you can follow these steps:

  1. Use a diagnostic scanner to retrieve the fault codes
  2. Inspect the TCM and LED output circuit for any visible damage or corrosion
  3. Check the wiring connections for proper continuity

How to fix DTC P1705 on BMW

To fix DTC P1705 on a BMW, you may need to:

  1. Repair or replace any damaged wiring in the LED output circuit
  2. Inspect and replace the TCM if necessary
  3. Ensure all connections are secure and free of corrosion

How to erase DTC P1705 on BMW

To erase DTC P1705 on a BMW, you can:

  1. Use a diagnostic scanner to clear the fault codes
  2. After fixing the underlying issue, reset the codes to see if the problem persists

Recommended tools & DTC Scanners for BMW

Best Diagnostic App for modern BMWs: BimmerLink

Recommended Bluetooth adapter for Bimmerlink: OBDLink CX

Cable adapter for Bimmerlink: Enet Cable USB Type C

For older BMWs we recommend: Autel AutoLink AL319 (2024 version)

Easy-to-use Multimeter for reliable diagnostics: AstroAI Auto-ranging Multimeter

← All BMW Diagnostic Trouble Codes

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