Mazda 626 Station Wagon, Workshop Manual

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TROUBLESHOOTING
STEP INSPECTION ACTION
5 Check the value at the following PID using the
NGS tester.
(See F1-25 PCM INSPECTION.)
• TP V
Is PID value okay?
Yes Go to next step.
No Repair or replace any defective parts.
6 Disconnect PCM.
Is resistance between ground terminal at PCM
connector and body ground less than 5.0 £2?
Yes Go to next step.
No Repair open ground circuit.
Reconnect PCM.
7 Check LINE PID value.
Is LINE PID value okay? Yes Overhaul control valve body and repair or replace any
defective parts.
(See ATX workshop manual (FN4A-EL) [1623-10-98E].)
If problem remains, overhaul transaxle and repair or
replace any defective parts.
(See ATX workshop manual (FN4A-EL) [1623-10-98E].)
No Repair or replace any defective parts.
NO.18 EXCESSIVE SHIFT SHOCK IS FELT WHEN UPSHIFTING AND DOWNSHIFTING
18
Excessive shift shock is felt when upshifting and downshifting
DESCRIPTION
• Excessive shift shock is felt when depressing accelerator pedal to accelerate at upshifting. During
cruising, excessive shift shock is felt when depressing accelerator pedal at downshifting.
POSSIBLE
CAUSE
• Shift shock may worsen when the fail-safe is operating. The shift shock has worsened if the TP sensor,
input/turbine speed sensor, or vehicle speed sensor signal malfunctions.
1. Clutch slippage, burned (2-4 brake band, 3-4 clutch)
• Line pressure low, high • Shift solenoid E malfunction
• TP sensor malfunction • Shift solenoid A malfunction
• Vehicle speed sensor malfunction • Shift solenoid B malfunction
• input/turbine speed sensor malfunction • Shift solenoid C malfunction
• Transaxle fluid temperature sensor • Pressure control solenoid malfunction
malfunction • Accelerator cable misadjustment
• Shift solenoid D malfunction • Control valve body malfunction
2. Poor hydraulic operation (Malfunction in range change)
• Forward accumulator malfunction • Servo apply accumulator malfunction
Diagnostic procedure
STEP INSPECTION ACTION
1
Perform the stall test.
(See K2-22 MECHANICAL SYSTEM TEST, Stall
Test.)
Is stall speed okay?
Yes Go to next step.
No Repair or replace any defective parts.
2 Check the value at the following PID using the
NGS tester.
(See F1-25 PCM INSPECTION.)
• T P V
Is PID value okay?
Yes Go to next step.
No
Repair or replace any defective parts.
3
Disconnect PCM.
Is resistance between ground terminal at PCM
connector and body ground less than 5.0 £2? Yes
Go to next step.
No Repair open ground circuit.
Reconnect PCM.
4 Check LINE PID value.
Is LINE PID value okay? Yes Overhaul control valve body and repair or replace any
defective parts.
(See ATX workshop manual (FN4A-EL) [1623-10-98E].)
If problem remains, overhaul transaxle and repair or
replace any defective parts.
(See ATX workshop manual (FN4A-EL) [1623-10-980.)
No Repair or replace any defective parts.
K 2-150