TROUBLESHOOTING
K2–197
K2
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NO.18 EXCESSIVE SHIFT SHOCK IS GIVEN WHEN UPSHIFTING AND DOWNSHIFTING
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NO.19 EXCESSIVE SHIFT SHOCK ON TORQUE CONVERTER CLUTCH (TCC)
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3 • Is line pressure okay?
(See K2–72 Line Pressure Test.)
Yes Go to next step.
No Repair or replace any defective parts according to
inspection results.
4 • Is stall speed okay?
(See K2–74 Stall Speed Test.)
Yes Go to next step.
No Go to Step 6.
5 • Inspect TR switch and related harness:
vibration, intermittent open/short circuit.
• Is it okay?
Yes Go to next step.
No Repair or replace part if necessary.
6 • Stop engine and turn ignition switch on.
• Inspect pressure control solenoid circuit.
• Is it okay?
Yes • Overhaul control valve body and repair or replace any
defective parts.
(See ATX Workshop Manual.)
• If problem remains, replace or overhaul transaxle and
repair or replace any defective parts.
(See ATX Workshop Manual.)
No • Inspect for pressure control solenoid mechanical stuck.
(See K2–88 SOLENOID VALVE INSPECTION.)
7 • Verify test results.
— 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.
STEP INSPECTION ACTION
18 Excessive shift shock is given when upshifting and downshifting
DESCRIPTION
• Excessive shift shock felt when depressing accelerator pedal to accelerate at upshifting.
• During cruising, excessive shift shock felt when depressing accelerator pedal at downshifting.
POSSIBLE
CAUSE
• Shift shock may worsen when fail-safe is operating. The shift shock has worsen if TP sensor, input/
turbine speed sensor, or VSS signal malfunctions.
— Clutch slipped, burned
• Line pressure low, high
• Incorrect throttle position signal
• Malfunction of VSS
• Malfunction of input/turbine speed sensor
• Malfunction of TFT sensor
• Malfunction of shift solenoid A, B, or C
• Malfunction of TCC solenoid valve
• Misadjustment of throttle cable
• Malfunction of body ground and sensor ground
• Malfunction of control valve body
— Poor hydraulic operation (Malfunction in range change)
Note
• Before following troubleshooting steps, make sure that Automatic Transaxle On-Board Diagnostic
and Automatic Transaxle Basic Inspection are conducted.
19 Excessive shift shock on torque converter clutch (TCC)
DESCRIPTION • Strong shock felt when TCC engaged.
POSSIBLE
CAUSE
• The troubleshooting flow is the same as No.16 “Judder upon torque converter clutch (TCC) operation”.
Note
• Before following troubleshooting steps, make sure that Automatic Transaxle On-Board Diagnostic
and Automatic Transaxle Basic Inspection are conducted.
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