TROUBLESHOOTING
N0.19 EXCESSIVE SHIFT SHOCK ON TORQUE CONVERTER CLUTCH (TCC)
19 Excessive shift shock on torque converter clutch (TCC)
DESCRIPTION
• Strong shock is felt when TCC is engaged.
POSSIBLE
CAUSE
• The troubleshooting flow is the same as for No.16 “Judder upon TCC operation”.
N0.20 NOISE OCCURS AT IDLE WHEN VEHICLE IS STOPPED IN ALL POSITIONS/RANGES
20 Noise occurs at idle when vehicle is stopped in all positions/ranges
DESCRIPTION
• Transaxle is noisy in all positions and ranges when vehicle is idling.
POSSIBLE
CAUSE
• The malfunction is in the oil pump which causes a high-pitched noise to be emitted from the transaxle at
idle.
Note
• If a noise is emitted during shifting only, the malfunction is in shift solenoid D, E or shift solenoid A, B,
C. If a noise is emitted during shifting at certain gears only or during deceleration only, It is gear noise.
' Diagnostic procedure
STEP INSPECTION ACTION
1 Does noise stop when solenoid connector is Yes Go to next step.
disconnected?
No
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].)
2
Check the value at the following PIDs using the
NGS tester.
(See F1-25 PCM INSPECTION.)
• TPV
• VS
• TURBINE
Are PID values okay?
Yes
Go to next step.
No Repair or replace any defective parts.
3 Disconnect PCM.
Yes Go to next step.
Is resistance between ground terminal at PCM
connector and body ground less than 5.0 £2?
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) [1623-10-98E].)
No Repair or replace any defective parts.
K2-151
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