LEMON Manuals: Even more car manuals for everyone
Home >> Mazda >> 2012 >> 6 i Touring >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 13 (Symptom Troubleshooting [Automatic Transaxle AY6A-El]) >> No.9 Abnormal Shifting >> Diagnostic Procedure

Diagnostic Procedure

WARNING: This page is about a different variant/trim than selected.
STEP INSPECTION ACTION
1 VERIFY TIRE CONDITION 
  • Inspect the tire size and air pressure.
  • Is the tire of specified size and air pressure?
Yes Go to the next step.
No Replace with a specified tire size or adjust the air pressure of each specified tire to the specified value.
2 INSPECT ABS WHEEL SPEED SENSOR SIGNAL 
Yes Go to the next step.
No
  • Perform the following inspections:

    ABS wheel-speed sensor installation inspection 

    • Is the ABS wheel-speed sensor installation normal?

    ABS sensor rotor installation inspection 

    • Is the ABS sensor rotor installed twisted?

      (may cause output of abnormal wave pattern at high speeds.)

    • Are there missing teeth on the sensor rotor?
  • If there is any malfunction, repair or replace the malfunctioning location.
3 INSPECT TCM FOR POOR GROUND 
  • Inspect for continuity between the TCM terminal A9 and battery negative terminal.
  • Is there continuity?
Yes Go to the next step.
No Repair or replace ground circuit.
4 INSPECT SHIFT SOLENOIDS FOR MALFUNCTION 
Yes Go to the next step.
No Inspect the coupler component.
If normal, replace the control valve body.
(See CONTROL VALVE BODY REMOVAL/INSTALLATION .)
5 VERIFY IF MALFUNCTION CAUSE IS TCM TERMINAL OR TRANSAXLE 
Yes Inspect the TCM terminal for bend, damage, corrosion or poor contact.
No Replace the transaxle.
(See AUTOMATIC TRANSAXLE REMOVAL/INSTALLATION .)
6
  • Verify test results.
    • If normal, return to the diagnostic index to service any additional symptoms.
    • If malfunction remains, inspect the related Service Bulletins and/or On-line Repair Information and perform repair or diagnosis.
      • If the vehicle is repaired, troubleshooting completed.
      • If the vehicle is not repaired or additional diagnostic information is not available, replace the TCM.