Mazda Mazda6 Workshop Manual Supplement page 609

NO.11 SHIFT POINT IS HIGH OR LOW
11 Shift point is high or low
• Shift point considerably different from automatic shift diagram.
• Shift delays when accelerating.
DESCRIPTION
• Shift occurs quickly when accelerating and engine speed does not increase.
• If the transaxle does not shift abnormally, there is a malfunction of input signal to TP sensor, input/
turbine speed sensor, or VSS.
• If engine speed is high or low regardless that shifting is normal, inspect tachometer.
• Verify that output signal of TP sensor changes linearly.
POSSIBLE
CAUSE
Note
• Before following troubleshooting steps, make sure that Automatic Transaxle On-Board Diagnostic
End Of Sie
NO.12 TORQUE CONVERTER CLUTCH (TCC) NON-OPERATION
12 Torque converter clutch (TCC) non-operation
• TCC does not operate when vehicle reaches TCC operation range.
DESCRIPTION
• Basically, TCC does not operate when fail-safe is operating. Verify DTC at first. If TCC operates when
driving at high speeds only, the malfunction (improper adjustment) is in D and/or M ranges switch circuit
or TR switch circuit.
Note
• TCC piston slipped, burned
— Line pressure low
POSSIBLE
CAUSE
• Malfunction of TP sensor (Not operating linearly)
• Malfunction of input/turbine speed sensor or VSS
Note
• Before following troubleshooting steps, make sure that Automatic Transaxle On-Board Diagnostic
Diagnostic procedure
STEP
• Turn ignition switch to ON.
1
• Does gear position lamp indication
correspond to selector lever position?
• Disconnect TCM.
2
• Is resistance between ground terminals 1C,
1Y at TCM connector and body ground less
than 5.0 ohm?
• Remove torque converter.
3
• Inspect torque converter.
(See ATX Workshop Manual.)
• Is torque converter okay?
• Verify test results.
4
— If okay, return to diagnostic index to service any additional symptoms.
— If malfunction remains, inspect related Service Informations and perform repair or diagnosis.
— If vehicle repaired, troubleshooting completed.
— If vehicle not repaired or additional diagnostic information not available, replace TCM.
K2–194
TROUBLESHOOTING
and Automatic Transaxle Basic Inspection are conducted.
• If the TCC or piston is stuck, inspect them. In addition, inspect the oil cooler for foreign particles
which may have mixed in with the ATF.
• Incorrect throttle position signal
• Input/turbine speed sensor malfunction
• TFT sensor malfunction
• Sensor ground malfunction
• VSS malfunction
• Malfunction of output solenoid valve system (Sticking)
• TCC solenoid valve malfunction
• Malfunction of control valve body system (Poor operation, sticking)
• TCC piston hydraulic pressure system malfunction
and Automatic Transaxle Basic Inspection are conducted.
INSPECTION
Yes Go to next step.
No Go to symptom troubleshooting No.27 "Gear position
indicator light does not illuminate in M range", or No.28
"Gear position indicator light illuminates in D range or P, N,
R positions".
Yes Go to next step.
No Repair open ground circuit.
• Overhaul control valve body and repair or replace any
Yes
defective parts.
(See ATX Workshop Manual.)
• If problem remains, replace or overhaul transaxle and
repair or replace any defective parts.
(See ATX Workshop Manual.)
• Replace torque converter.
No
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ACTION