Mazda CX-7 2007 Workshop Manual page 1003

SYMPTOM TROUBLESHOOTING [AW6A-EL, AW6AX-EL]
NO.23 TRANSAXLE OVERHEATS[AW6A-EL, AW6AX-EL]
23 TRANSAXLE OVERHEATS
• Burnt smell emitted from transaxle.
DESCRIPTION
• Smoke emitted from transaxle.
• The malfunction is restricted to the hindrance of coolant at the oil cooler. In addition, overheating of the
transaxle may be caused by a malfunction of the TFT sensor.
— Line pressure low
• ATF level low
• Incorrect accelerator opening signal
— Oil cooler malfunction (Foreign material mixed in with ATF)
POSSIBLE
— TFT sensor malfunction
CAUSE
— Excessive amount of ATF
Note
• Before following the troubleshooting steps, make sure that the Automatic Transaxle On-Board
Diagnostic and Automatic Transaxle Basic Inspection are conducted. (See 05-03-3 BASIC
INSPECTION[AW6A-EL, AW6AX-EL].)
Diagnostic procedure
STEP
• Is the line pressure normal?
1
(See 05-17-3 MECHANICAL SYSTEM
TEST[AW6A-EL, AW6AX-EL].)
• Is stall speed normal?
2
(See 05-17-3 MECHANICAL SYSTEM
TEST[AW6A-EL, AW6AX-EL].)
• Inspect the TFT sensor and related wiring
3
harness: vibration, intermittent open/short
circuit
(See 05-17-12 TRANSAXLE FLUID
TEMPERATURE (TFT) SENSOR
INSPECTION[AW6A-EL, AW6AX-EL].)
• Is it normal?
• Inspect the line pressure control solenoid.
4
(See 05-17-20 SOLENOID VALVE
INSPECTION[AW6A-EL, AW6AX-EL].)
• Is it normal?
• Inspect for bending, damage, corrosion or
5
kinks of the oil cooler pipes.
• Are oil cooler pipes normal?
• Verify test results.
6
— 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.
End Of Sie
INSPECTION
Yes Go to the next step.
No Repair or replace any malfunctioning parts according to the
inspection results.
Yes Go to the next step.
No Repair or replace any malfunctioning parts according to the
inspection results.
Yes Go to the next step.
No Repair or replace part if necessary.
Yes Go to the next step.
No Replace the control valve body.
(See 05-17-38 CONTROL VALVE BODY REMOVAL/
INSTALLATION[AW6A-EL, AW6AX-EL].)
Yes Replace the transaxle.
(See 05-17-29 AUTOMATIC TRANSAXLE REMOVAL/
INSTALLATION[AW6A-EL, AW6AX-EL].)
No Replace any malfunctioning parts.
id050310802800
ACTION
05-03–25
05-03