Mazda CX-7 2007 Workshop Manual page 967

ON-BOARD DIAGNOSTIC [AW6A-EL, AW6AX-EL]
DTC P2757[AW6A-EL, AW6AX-EL]
DTC P2757 Torque converter clutch (TCC) stuck off
• When all conditions below are satisfied.
— ATF temperature 20 °C {68 °F} or more
— Driving in 4GR— 6GR at D range
— Engine running
— Torque converter clutch (TCC) operating
— Difference between engine speed and Counter drive gear (output) revolution speed (VSS) 100 rpm or
more
DETECTION
Diagnostic support note:
CONDITION
• This is a continuous monitor (CCM).
• The MIL illuminates if the TCM detects the above malfunction condition during the first drive cycle.
• A PENDING CODE is not available.
• FREEZE FRAME DATA is available.
• The AT warning light illuminates.
• The DTC is stored in the TCM memory.
• ATF level low
• Deteriorated ATF
• TCC control solenoid stuck
POSSIBLE
• Line pressure low
CAUSE
• Control valve stuck.
• Torque converter malfunction
• TCM malfunction
Diagnostic procedure
STEP
1 VERIFY FREEZE FRAME DATA HAS BEEN
RECORDED
• Has the FREEZE FRAME DATA been
recorded?
2 VERIFY RELATED REPAIR INFORMATION
AVAILABILITY
• Verify related Service Bulletins and/or on-line
repair information availability.
• Is any related repair information available?
3 INSPECT ATF CONDITION
• Turn the ignition switch to the LOCK position.
• Inspect the ATF condition.
— Clear red: Normal
— Light red (pink): Water mixed in fluid
— Reddish brown: Deteriorated ATF
• Is it normal?
(See 05-17-10 AUTOMATIC TRANSAXLE
FLUID (ATF) INSPECTION[AW6A-EL,
AW6AX-EL].)
4 INSPECT ATF LEVEL
• Start the engine.
• Warm up the ATX.
• Is the ATF level within the specification?
(See 05-17-10 AUTOMATIC TRANSAXLE
FLUID (ATF) INSPECTION[AW6A-EL,
AW6AX-EL].)
5 INSPECT LINE PRESSURE
• Start the engine.
• Measure the line pressures.
(See 05-17-3 MECHANICAL SYSTEM
TEST[AW6A-EL, AW6AX-EL].)
• Are the line pressures within the
specifications?
6 INSPECT TCC CONTROL SOLENOID
• Inspect the TCC control solenoid.
(See 05-17-20 SOLENOID VALVE
INSPECTION[AW6A-EL, AW6AX-EL].)
• Is it normal?
INSPECTION
Yes Go to the next step.
No Record the FREEZE FRAME DATA on the repair order,
then go to the next step.
Yes Perform repair or diagnosis according to the available
repair information.
• If the vehicle is not repaired, go to the next step.
No Go to the next step.
Yes Go to the next step.
No If the ATF color is milky or reddish brown, replace ATF, then
go to Step 7.
(See 05-17-11 AUTOMATIC TRANSAXLE FLUID (ATF)
REPLACEMENT[AW6A-EL, AW6AX-EL].)
Yes Go to the next step.
No Add ATF to the specified level, then go to Step 7.
(See 05-17-10 AUTOMATIC TRANSAXLE FLUID (ATF)
INSPECTION[AW6A-EL, AW6AX-EL].)
Yes Go to the next step.
No All ranges: Replace the oil pump, then go to Step 7.
Any ranges: Replace the control valve body, then go to
Step 6.
(See 05-17-38 CONTROL VALVE BODY REMOVAL/
INSTALLATION[AW6A-EL, AW6AX-EL].)
Yes Replace the Torque converter, then go to the next step.
(See 05-17-46 TORQUE CONVERTER REMOVAL/
INSTALLATION[AW6A-EL, AW6AX-EL].)
No Replace the control valve body, then go to the next step.
(See 05-17-38 CONTROL VALVE BODY REMOVAL/
INSTALLATION[AW6A-EL, AW6AX-EL].)
id050211805100
ACTION
05-02–79
05-02