NO.24 VIBRATION CONCERNS (ENGINE) [MZR-CD 2.2]

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24

VIBRATION CONCERNS (ENGINE)
DESCRIPTION
•  Vibration from the under bonnet or driveline.
POSSIBLE CAUSE
•  Loose attaching bolts or worn parts (exhaust system, suspension)
•  Cooling fan seat are improper
•  Engine or transaxle mounts are improperly installed
•  Components malfunction such as worn parts
•  Erratic signal from CMP sensor
•  ECT sensor or related circuit malfunction
•  Accelerator pedal position (APP) sensor or related circuit malfunction
•  MAF/IAT sensor or related circuit malfunction
•  Neutral switch malfunction
•  Fuel injector malfunction
•  Vacuum leakage
•  Improper tension or damaged drive belts
•  Improper balance of wheels or tires
•  Driveline malfunction
•  Suspension malfunction
Warning
The following troubleshooting flow chart contains the fuel system diagnosis and repair procedures. Read the following warnings before performing the fuel system services:
•  Fuel vapor is hazardous. It can easily ignite, causing serious injury and damage. Always keep sparks and flames away from fuel.
•  Fuel line spills and leakage are dangerous. Fuel can ignite and cause serious injury or death and damage. Fuel can also irritate skin and eyes. To prevent this, always complete “BEFORE REPAIR PROCEDURE” and “AFTER REPAIR PROCEDURE” described in this manual.

Diagnostic Procedure

STEP

INSPECTION

RESULTS

ACTION
1
Inspect the following components for loose attaching bolts or worn parts:
•  Cooling fan
•  Cooling fan seat
•  Drive belt and pulley
•  Engine mounts
•  Suspension
•  Exhaust system
Are all items normal?
Yes
Go to the next step.
No
Readjust or retighten the engine mount installation position.
Service if necessary for other parts.
2
Inspect the vacuum leakage.
Are the vacuum hoses normal?
Yes
Go to the next step.
No
Service if necessary.
Repeat Step 2.
3
Connect the M-MDS to the DLC-2.
Switch the ignition to ON.
Retrieve any DTCs.
Are any DTCs displayed?
Yes
DTC is displayed:
Go to the appropriate DTC test.
(See DTC TABLE [MZR-CD 2.2].)
Communication error message is displayed:
Inspect following:
•  Open circuit between main relay and PCM terminal 2C or 2F
•  Open circuit main relay and PCM terminal 2I
•  Main relay stuck open
•  Open or poor ground circuit (PCM terminal 2B, 2E, 2A or 2D)
•  Poor connection to vehicle body ground
No
No DTC is displayed:
Go to the next step.
4
Inspect the APP sensor.
(See ACCELERATOR PEDAL POSITION (APP) SENSOR INSPECTION [MZR-CD 2.2].)
Is the APP sensor normal?
Yes
Go to the next step.
No
Replace the accelerator pedal component.
5
Inspect the neutral switch.
(See NEUTRAL SWITCH INSPECTION [MZR-CD 2.2].)
Is the neutral switch normal?
Yes
Go to the next step.
No
Repair or replace the malfunctioning part.
6
Visually inspect the CMP sensor and the teeth of the pulse wheel.
(See CAMSHAFT POSITION (CMP) SENSOR INSPECTION [MZR-CD 2.2].)
Are the CMP sensor and the teeth of the pulse wheel normal?
Yes
Inspect the following PIDs:
(See PCM INSPECTION [MZR-CD 2.2].)
•  ECT
•  IAT
•  MAF
•  RPM
If the PID value is not as specified, repair or replace malfunctioning parts.
If the PID value is normal, go to the next step.
No
Replace malfunctioning parts.
7
Inspect the fuel injector.
(See FUEL INJECTOR INSPECTION [MZR-CD 2.2].)
Is the fuel injector normal?
Yes
Inspect the following systems:
•  Wheels
•  Transaxle and mounts
•  Driveline
•  Suspension
•  Fuel warmer
Service if necessary.
No
Repair or replace if necessary.
(See FUEL INJECTOR REMOVAL/INSTALLATION [MZR-CD 2.2].)
8
Verify test results.
•  If normal, return to the diagnostic index to service any additional symptoms.
•  If the malfunction remains, inspect the related Service Information and perform repair or diagnosis.
―  If the vehicle is repaired, troubleshooting completed.
―  If the vehicle is not repaired or additional diagnostic information is not available, reprogram the PCM if later calibration is available. Retest.