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P1706 – BMW DTC

BMW DTC P1706 – Transmission Control Module LED Output Short Circuit

DTC P1706 meaning on BMW

DTC P1706 on a BMW indicates a Transmission Control Module (TCM) LED Output Short Circuit. This fault code is triggered when the TCM detects a short circuit in the LED output circuit.

BMW DTC P1706 symptoms

Symptoms of DTC P1706 in a BMW may include:

  • Malfunction indicator lamp (MIL) illuminated
  • Transmission shifting issues
  • Reduced performance

BMW DTC P1706 causes

The common causes of DTC P1706 in a BMW are:

  • Short circuit in the LED output circuit
  • Faulty wiring or connectors
  • Defective Transmission Control Module

BMW DTC P1706 seriousness

DTC P1706 should not be ignored as it can lead to transmission issues and affect the overall performance of the vehicle. It is recommended to address this fault code promptly to prevent further damage.

How to diagnose DTC P1706 on BMW

To diagnose DTC P1706 on a BMW, follow these steps:

  1. Use a diagnostic scanner to retrieve the fault codes
  2. Inspect the LED output circuit for any visible damage or short circuits
  3. Check the wiring and connectors for any signs of wear or corrosion
  4. Test the Transmission Control Module for proper functionality

How to fix DTC P1706 on BMW

To fix DTC P1706 on a BMW, you can:

  1. Repair any short circuits in the LED output circuit
  2. Replace any faulty wiring or connectors
  3. If the Transmission Control Module is defective, replace it with a new one

How to erase DTC P1706 on BMW

To erase DTC P1706 on a BMW, you can:

  1. Use a diagnostic scanner to clear the fault codes
  2. After fixing the underlying issue, reset the Transmission Control Module
  3. Perform a test drive to ensure the fault code does not reappear

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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