Mazda MX-6 1998, Workshop Manual

Page: 779 / 1282

TROUBLESHOOTING [GF4A-EL]
16 JUDDER UPON TORQUE CONVERTER CLUTCH (TCC) OPERATION
TROUBLESHOOTING HINTS
Poor TCC engagement due to either slippage because the TCC piston is stuck or the line pressure is low.
Caution
• If the TCC or piston are stuck, inspect them. In addition, Inspect the oil cooler for foreign particles which may
have mixed in with the ATF.
© T o rq u e converter clutch piston slippage, burned
• Line pressure low
• Malfunction of throttle position sensor
• Malfunction of vehicle speedometer sensor
• Malfunction of input/turbine speed sensor
• Malfunction of sensor ground
• Malfunction of torque converter clutch control solenoid valve (Sticking)
• Malfunction of control valve body system (Poor operation, sticking)
STEP
INSPECTION
ACTION
1 Check the voltage at the following terminal of
the powertrain control module
d
- 0 1 -40B POWERTRAIN CONTROL
MODULE (PCM) INSPECTION [KL]
• TCC control solenoid valve signal
Is terminal voltage okay?
Yes Go to next step
No Repair or replace any defective parts
2 Check the voltage at the following terminals of
the powertrain control module
id
- 01—40B POWERTRAIN CONTROL
MODULE (PCM) INSPECTION [KL]
• Throttle position sensor signal
• Vehicle speedometer sensor signal
• Input/turbine speed sensor signal
• Ground (Engine, body)
Are terminal voltage okay?
Yes Replace powertrain control module
D- 01-40B POWERTRAIN CONTROL MODULE (PCM)
REMOVAL/INSTALLATION [KL]
No Repair or replace any defective parts
3 Check the voltage at the following terminal of
the powertrain control module
i -r 01-40B POWERTRAIN CONTROL
MODULE (PCM) INSPECTION [KL]
• Pressure control solenoid signal
Is terminal voltage okay?
Yes
Go to next step
No
Repair or replace any defective parts
4 Check duty of pressure control solenoid
c r 0 5 -1 7B SOLENOID VALVES
INSPECTION [GF4A-EL], Pressure
Control Solenoid Output Duty Inspection
Is duty okay?
Yes Overhaul control valve body and repair or replace any
defective parts
o r ATX workshop manual
If problem remains, overhaul transaxle and repair or
replace any defective parts
id
-
ATX workshop manual
No Go to step 3
0 5 -0 1 B -3 3