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Home >> Mazda >> 2011 >> 6 s Touring Plus >> Repair and Diagnosis >> Accessories & Equipment >> Gauges & Instrument Panels >> Symptom Troubleshooting [Instrument Cluster] >> No. 8 Speedometer Indication Is Defective [Instrument Cluster] >> Diagnostic procedure

Diagnostic procedure

DIAGNOSTIC PROCEDURE CHART

STEP INSPECTION ACTION
1
  • Start the engine, and drive the vehicle.
    • Does the speedometer needle move smoothly?
    • Does the speedometer needle indicate correct speed?
Yes Troubleshooting completed. (The system is normal.)
No Go to the next step.
2 Yes Go to the applicable troubleshooting procedure.
(See DTC TABLE [MZR 2.5] .)
(See DTC TABLE [MZI 3.7 V6] .)
(See ON-BOARD DIAGNOSIS [DYNAMIC STABILITY CONTROL (DSC)] .)
(See ON-BOARD DIAGNOSTIC SYSTEM DTC TABLE [FS5A-EL] .)
(See ON-BOARD DIAGNOSTIC SYSTEM DTC TABLE [AY6A-EL] .)
No Go to the next step.
3
  • Start the engine.
  • inspect the tachometer and water temperature gauge indications.
  • Do the tachometer and water temperature gauge function property?
Yes Go to the next step.
No Go to Step 5.
4 Yes Verify that the PCM, TCM, DSC HU/CM are connected securely.
If the PCM, TCM, DSC HU/CM is poorly connected: Connect the suspected connector securely.
If a malfunction is in the PCM, TCM, DSC HU/CM side connector:
Replace the suspected control module.
(See PCM REMOVAL/INSTALLATION [MZR 2.5] .)
(See PCM REMOVAL/INSTALLATION [MZI 3.7 V6] .)
(See TCM REMOVAL/INSTALLATION [FS5A-EL] .)
(See TCM REMOVAL/INSTALLATION [AY6A-EL] .)
(See PARKING BRAKE LEVER REMOVAL/INSTALLATION .)
(See DSC HU/CM REMOVAL/INSTALLATION .)
If a malfunction is in the vehicle side connector: 
Repair or replace the malfunctioning part.
No Replace the instrument cluster.
(See INSTRUMENT CLUSTER REMOVAL/INSTALLATION .)
5 Yes Go to applicable DTC inspection.
(See DTC TABLE [INSTRUMENT CLUSTER] .)
 
No Go to the next step.
6
  • Disconnect the negative battery cable.
  • Measure the resistance between the DLC-2 terminals F and E.
  • Is the resistance below 60 ohms? 
Yes Go to the next step.
No Go to Step 7.
7
  • Disconnect the negative battery cable.
  • Inspect the DLC-2 terminals F and E for short to power supply or ground.
  • Is there any malfunction?
Yes
  • Inspect the wiring harness and CAN system-related module.
  • Repair or replace the malfunctioning part.
No Replace the instrument cluster.
(See INSTRUMENT CLUSTER REMOVAL/INSTALLATION .)
8
  • Switch the ignition to off.
  • Inspect the instrument cluster connector terminals for poor connection (such as damaged/pulled-out pins, and corrosion).
  • Are the terminals normal?
Yes Go to the next step.
No Repair or replace the terminal.
9
  • Disconnect the negative battery cable. Measure the resistance between the instrument cluster connector terminals 2X and 2W.
  • Is the resistance 114-126 ohms? 
G07621796
Yes
  • Inspect the wiring harness and CAN system-related module.
  • Repair or replace the malfunctioning part.
No Replace the instrument cluster.
(See INSTRUMENT CLUSTER REMOVAL/INSTALLATION .)