Mazda MX-6 1998, Руководство по ремонту

Страница: 776 / 1282

TROUBLESHOOTING [GF4A-EL]
9
ABNORMAL SHIFT
TROUBLESHOOTING HINTS
There is a malfunction in the signal circuit which controls shifting (throttle position sensor, input/turbine speed sensor, vehicle
speedometer sensor), the control valve is stuck, or the clutch circuit is stuck.
Q Clutch 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 shift solenoid A (Sticking)
• Malfunction of shift solenoid B (Sticking)
• Malfunction of shift solenoid C (Sticking)
• Malfunction of pressure control solenoid valve (Sticking)
• Malfunction of body ground (Sticking)
• Malfunction of control valve body system (Poor operation, sticking)
© T h ro ttle position sensor malfunction (Not operating linearly)
© Input/turbine speed sensor, vehicle speedometer sensor malfunction
STEP INSPECTION
ACTION
1 Check the voltage between ground terminal of
powertrain control module and transaxle case
D- 0 1 -40B POWERTRAIN CONTROL
MODULE (PCM) INSPECTION [KL]
Is voltage 0 V?
Yes Go to next step
No Inspection ground circuit
2 Check the voltage at the following terminals of
the powertrain control module
tr 01-40B POWERTRAIN CONTROL
MODULE (PCM) INSPECTION [KL]
• Throttle position sensor signal
• Input/turbine speed sensor signal
• Vehicle speedometer sensor signal
Is terminal voltage okay?
Yes Overhaul control valve body and repair or replace any
defective parts
c r ATX workshop manual
If problem remains, overhaul transaxle and repair or
replace any defective parts
tr
ATX workshop manual
No Repair or replace any defective parts
10 FREQUENT SHIFTING
TROUBLESHOOTING HINTS
The circuit which is the cause is basically the same as for No.9 “ABNORMAL SHIFT”. However, a malfunction of the input
signal to the throttle position sensor, input/turbine speed sensor vehicle speedometer sensor (including the sensor ground,
sensor harness, and connector), or clutch slippage (clutch stuck, low pressure in line) may also be the cause.___________
11 SHIFT POINT HIGH OR LOW
TROUBLESHOOTING HINTS
• If the transaxle does not abnormal shift, there is a malfunction of the input signal to the throttle position sensor,
input/turbine speed sensor, or vehicle speedometer sensor.
• If the engine speed is high or low regardless that shifting is normal, inspect the tachometer.
• Verify that the output signal of the throttle sensor changes linearly._______________________________________
0 5 -0 1 B -3 0