VEHICLE BODY OR CLUTCH PEDAL VIBRATES/SHIFT OPERATION DIFFICULTY/NOISE HEARD [M66M-D]

id0503n1195500

Troubleshooting item

Vehicle body or clutch pedal vibrates/shift operation difficulty/noise heard
Description
•  Vehicle body vibrates during idling or while driving
•  Clutch pedal vibrates
•  Shift operation is difficult because clutch does not fully release
•  Teeth grinding noise is heard
•  Booming noise is heard
Possible cause
Note
•  The vehicle body may vibrate due to poor clutch operation or if the engine speed decreases below the idle speed by clutch operation when accelerating from a standstill, but this does not indicate a vehicle malfunction.
•  Resonance with engine vibration (mainly with exhaust system parts)
•  Resonance of rotating parts on vehicle (drive shaft, tire, etc.)
•  Clutch fluid malfunction
•  Clutch pedal malfunction
•  Manual transmission shift mechanism malfunction
•  Manual transmission oil malfunction
•  Engine mount malfunction
•  Clutch master cylinder malfunction
•  Clutch release cylinder malfunction
•  Clutch unit malfunction
•  Manual transmission internal malfunction
System wiring diagram
•  Not applicable
Connector diagram
•  Not applicable

Diagnostic Procedure

Step

Inspection

Results

Action
1
VERIFY MALFUNCTION SYMPTOM
•  Is the malfunction symptom at the same level compared to a vehicle of the same model?
Yes
Go to repair completion verification.
No
Go to the next step.
2
DETERMINE IF MALFUNCTION CAUSE IS CLUTCH OR MANUAL TRANSMISSION
•  Install tires of another brand.
Caution
•  When tires of another brand are installed, the same malfunction can occur due to conditions different from customer explanation. Be careful not to confuse it with customer complaint.
•  When installing tires of a different brand, install 4 tires with the same tire wear.
•  Perform simulation driving at the same engine speed, gear position, and vehicle speed that customer vehicle had malfunction.
•  Does the same malfunction occur?
Yes
Reinstall customer's vehicle tire. Go to next step.
No
The clutch and manual transmission are normal.
(Resonance with engine vibration or resonance with rotating parts of vehicle)
If required, determine the cause.
3
INSPECT IF MALFUNCTION CAUSE IS INSUFFICIENT CLUTCH FLUID LEVEL
•  Inspect the clutch fluid.
•  Is the clutch fluid normal?
Yes
Go to the next step.
No
Repair or replace the malfunctioning location and perform the repair completion verification.
4
INSPECT IF MALFUNCTION CAUSE IS CLUTCH FLUID LEAKAGE
•  Inspect for clutch fluid leakage.
•  Is there clutch fluid leakage?
Yes
Repair or replace the malfunctioning location and perform the repair completion verification.
No
Go to the next step.
5
INSPECT IF MALFUNCTION CAUSE IS CLUTCH PEDAL OR TRAPPED AIR IN CLUTCH FLUID
•  Inspect the clutch pedal.
•  Are all the items normal?
Yes
Go to the next step.
No
Repair or replace the malfunctioning location and perform the repair completion verification.
6
INSPECT IF MALFUNCTION CAUSE IS MANUAL TRANSMISSION SHIFT MECHANISM
•  Inspect the following of the manual transmission shift mechanism.
―  Installation condition of part
―  Damage, deterioration, and wear
―  Shift lever movement
•  Are all the items normal?
Yes
Go to the next step.
No
Repair or replace the malfunctioning location and perform the repair completion verification.
7
INSPECT IF MALFUNCTION CAUSE IS INSUFFICIENT MANUAL TRANSMISSION OIL LEVEL
•  Inspect the manual transmission oil.
•  Is the manual transmission oil normal?
Yes
Go to the next step.
No
Repair or replace the malfunctioning location and perform the repair completion verification.
8
INSPECT IF MALFUNCTION CAUSE IS ENGINE MOUNT
•  Inspect the following of the engine mount.
―  Installation condition of part
―  Damage, deterioration, and wear
―  Oil leakage
•  Are all the items normal?
Yes
Go to the next step.
No
Repair or replace the malfunctioning location and perform the repair completion verification.
9
INSPECT IF MALFUNCTION CAUSE IS CLUTCH MASTER CYLINDER
•  Inspect the following of the clutch master cylinder.
―  Installation condition of part
―  Damage, deterioration, and wear
―  Cylinder movement
•  Are all the items normal?
Yes
Go to the next step.
No
Repair or replace the malfunctioning location and perform the repair completion verification.
10
INSPECT IF MALFUNCTION CAUSE IS CLUTCH RELEASE CYLINDER
•  Inspect the following of the clutch release cylinder.
―  Installation condition of part
―  Damage, deterioration, and wear
―  Cylinder movement
•  Are all the items normal?
Yes
Go to the next step.
No
Repair or replace the malfunctioning location and perform the repair completion verification.
11
INSPECT IF MALFUNCTION CAUSE IS RELEASE FORK
•  Inspect the following of the release fork.
―  Installation condition of part
―  Damage, deterioration, and wear
―  Pivot pin damage, deterioration, and wear
•  Is the release fork normal?
Yes
Go to the next step.
No
Repair or replace the malfunctioning location and perform the repair completion verification.
12
INSPECT IF MALFUNCTION CAUSE IS CLUTCH RELEASE COLLAR
•  Inspect the clutch release collar.
•  Is the clutch release collar normal?
Yes
Go to the next step.
No
Repair or replace the malfunctioning location and perform the repair completion verification.
13
INSPECT IF MALFUNCTION CAUSE IS CLUTCH COVER
•  Inspect the clutch cover.
•  Is the clutch cover normal?
Yes
Go to the next step.
No
Repair or replace the malfunctioning location and perform the repair completion verification.
14
INSPECT IF MALFUNCTION CAUSE IS CLUTCH DISC
•  Inspect the clutch disc.
•  Is the clutch disc normal?
Yes
Go to the next step.
No
Repair or replace the malfunctioning location and perform the repair completion verification.
15
INSPECT IF MALFUNCTION CAUSE IS FLYWHEEL (SKYACTIV-G 1.5) / DUAL-MASS FLYWHEEL (SKYACTIV-G 2.0)
•  Inspect the FLYWHEEL (SKYACTIV-G 1.5) / DUAL-MASS FLYWHEEL (SKYACTIV-G 2.0).
•  Is the FLYWHEEL (SKYACTIV-G 1.5) / DUAL-MASS FLYWHEEL (SKYACTIV-G 2.0) normal?
Yes
Manual transmission internal malfunction can be considered.
•  Replace the manual transmission.
No
Repair or replace the malfunctioning location and perform the repair completion verification.
Repair completion verification
VERIFY THAT VEHICLE IS R EPAIRED
•  Install/connect the part removed/disconnected during the troubleshooting procedure.
•  Has the malfunction symptom been eliminated?
Yes
Complete the symptom troubleshooting. (Explain contents of repair to customer)
No
Repeat the diagnosis from Step 1.