2017 Mazda 5 GS, Automatic TransFACTORY OEM SERVICE PROCEDURE

Check code 04

Inspection item Step Inspection Display Action
Light switch OFF/TNS input signal 1 Turn light switch to TNS position
G13728726Courtesy of MAZDA MOTORS CORP.
 The input signal is normal.
Go to the next step.
G13728727Courtesy of MAZDA MOTORS CORP.
 Go to Step 3.
2 Switch light switch off
G13728728Courtesy of MAZDA MOTORS CORP.
 Go to Step 4.
G13728729Courtesy of MAZDA MOTORS CORP.
 The input signal to the information display is normal.
3 Inspect the information display. Yes
  • Replace the information display.
No
  • Inspect for an open or short circuit in the light switch related wiring harness, poor connection or terminal disconnection of the connector.
  • If there is any malfunction, repair or replace the malfunctioning location.
4 Inspect the information display. Yes
  • Replace the information display.
No
  • Inspect for an open or short circuit in the light switch related wiring harness, poor connection or terminal disconnection of the connector.
  • If there is any malfunction, repair or replace the malfunctioning location.
Factory Service Tools

Use the Manual With the Right Hardware

Pair factory procedures with proven DIY tools so the instructions are easier to execute.

Disclosure: Verified tool recommendations may earn an affiliate commission at no cost to you.

Shop Manual-Ready ToolsCompare Repair QuoteQuote Shield Pro

When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.