Diagnostic procedure

2008 Mazda 6 s Sport, 4D Hatchback, StandardSECTION Diagnostic procedure
WARNING: This page is about a different car, the 2005 Mazda 6. However, it is still accessible from the selected car via links, so may be relevant.
CHECK CODE 08 DIAGNOSTIC PROCEDURE

STEP INSPECTION INDICATION ACTION
1 Turn headlight switch to TNS position. (TNS relay on.) on Go to next step.
off Measure voltage at instrument cluster terminal 2K.
Is voltage B+Β  ?
  • If as specified, replace instrument cluster.
  • If not as specified, inspect following parts.
    • TNS relay
    • Wiring harness (Battery-TNS relay-instrument cluster)
2 Turn headlight switch off. (TNS relay off.) on Measure voltage at instrument cluster terminal 2K.
Is voltage 0 VΒ  ?
  • If as specified, replace instrument cluster.
  • If not as specified, inspect following parts.
    • TNS relay
    • Wiring harness (Battery-TNS relay-instrument cluster)
off Input signal to instrument cluster is okay.
RENDER: 1.0x

NO RELATED

Recommended Tools & Savings

Use the Manual With the Right Hardware

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

Affiliate disclosure: We may earn a commission at no extra cost to you.

When to See a Mechanic

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

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