NO.22 VIBRATION CONCERNS (ENGINE) [MZ-CD 1.6 (Y6)]

22	VIBRATION CONCERNS (ENGINE)
DESCRIPTION	• Vibration from under the hood or driveline.
POSSIBLE CAUSE	• Loose attaching bolts or worn parts • Cooling fan seat is 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 sensor or related circuit malfunction • MAF/IAT sensor or related circuit malfunction • Idle switch or related circuit malfunction • Fuel injector malfunction • Vacuum leakage • Improper tension or damaged drive belts • Improper balance of wheels or tires • Driveline malfunction • Suspension malfunction Предупреждение The following troubleshooting flow chart contains the fuel system diagnosis and repair procedures. Read the following warnings before servicing the fuel system: • 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.

VIBRATION CONCERNS (ENGINE)

DESCRIPTION

• Vibration from under the hood or driveline.

POSSIBLE CAUSE

• Loose attaching bolts or worn parts

• Cooling fan seat is 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 sensor or related circuit malfunction

• MAF/IAT sensor or related circuit malfunction

• Idle switch or related circuit malfunction

• Fuel injector malfunction

• Vacuum leakage

• Improper tension or damaged drive belts

• Improper balance of wheels or tires

• Driveline malfunction

• Suspension malfunction

Предупреждение

The following troubleshooting flow chart contains the fuel system diagnosis and repair procedures. Read the following warnings before servicing the fuel system:

• 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.

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 • 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 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. Turn the engine switch to the ON position. Retrieve any DTC. Are DTCs displayed?	Yes	DTC is displayed: Go to the appropriate DTC test. Communication error message is displayed: Inspect for the following: • Open circuit between PCM control relay and PCM terminal 236 or 231 • Open circuit between PCM control relay and PCM terminal 241 • PCM control relay stuck open • Open or poor ground circuit (PCM terminal 307, 308 or 332) • Poorly connected vehicle body ground
No	No DTC is displayed: Go to the next step.
4	Connect the M-MDS to the DLC-2. Access the following PID. • APP Verify that the PID value when the accelerator pedal is depressed and/or released. Is PID value normal?	Yes	Inspect the vacuum leakage.
No	Inspect and repair or replace the following part: • Accelerator pedal position sensor
5	Inspect neutral switch adjustment. Is the neutral switch adjusted correctly?	Yes	Go to the next step.
No	Adjust the neutral switch correctly.
6	Visually inspect CMP sensor and teeth of pulse wheel. Are the CMP sensor and the teeth of pulse wheel normal?	Yes	Inspect the following PIDs: (See PCM INSPECTION [MZ-CD 1.6 (Y6)].) • 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 fuel injector. (See ПРОВЕРКА ТОПЛИВНЫХ ФОРСУНОК [MZ-CD 1.6 (Y6)].) Is the fuel injector normal?	Yes	Inspect the following systems: • Wheels • Transaxle and mounts • Driveline • Suspension Service if necessary.
No	Repair or replace if necessary.
8	Verify test results. • If normal, return to diagnostic index to service any additional symptoms. (See SYMPTOM DIAGNOSTIC INDEX [MZ-CD 1.6 (Y6)].) • If the malfunction remains, inspect related Service Information and perform repair or diagnosis. ― If the vehicle is repaired, troubleshooting is completed. ― If the vehicle is not repaired or additional diagnostic information is not available, replace the PCM. (See PCM REMOVAL/INSTALLATION [MZ-CD 1.6 (Y6)].)

STEP

INSPECTION

RESULTS

ACTION

Inspect the following components for loose attaching bolts or worn parts:

• Cooling fan

• Cooling fan seat

• Drive belt and pulley

• Engine mounts

• Exhaust system

Are all items normal?

Yes

Go to the next step.

Readjust or retighten the engine mount installation position.

Service if necessary for other parts.

Inspect vacuum leakage.

Are the vacuum hoses normal?

Yes

Go to the next step.

Service if necessary.

Repeat Step 2.

Connect the M-MDS to the DLC-2.

Turn the engine switch to the ON position.

Retrieve any DTC.

Are DTCs displayed?

Yes

DTC is displayed:

Go to the appropriate DTC test.

Communication error message is displayed:

Inspect for the following:

• Open circuit between PCM control relay and PCM terminal 236 or 231

• Open circuit between PCM control relay and PCM terminal 241

• PCM control relay stuck open

• Open or poor ground circuit (PCM terminal 307, 308 or 332)

• Poorly connected vehicle body ground

No DTC is displayed:

Go to the next step.

Connect the M-MDS to the DLC-2. Access the following PID.

• APP

Verify that the PID value when the accelerator pedal is depressed and/or released.

Is PID value normal?

Yes

Inspect the vacuum leakage.

Inspect and repair or replace the following part:

• Accelerator pedal position sensor

Inspect neutral switch adjustment.

Is the neutral switch adjusted correctly?

Yes

Go to the next step.

Adjust the neutral switch correctly.

Visually inspect CMP sensor and teeth of pulse wheel.

Are the CMP sensor and the teeth of pulse wheel normal?

Yes

Inspect the following PIDs:

(See PCM INSPECTION [MZ-CD 1.6 (Y6)].)

• 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.

Replace malfunctioning parts.

Inspect fuel injector.

(See ПРОВЕРКА ТОПЛИВНЫХ ФОРСУНОК [MZ-CD 1.6 (Y6)].)

Is the fuel injector normal?

Yes

Inspect the following systems:

• Wheels

• Transaxle and mounts

• Driveline

• Suspension

Service if necessary.

Repair or replace if necessary.

Verify test results.

• If normal, return to diagnostic index to service any additional symptoms. (See SYMPTOM DIAGNOSTIC INDEX [MZ-CD 1.6 (Y6)].)

• If the malfunction remains, inspect related Service Information and perform repair or diagnosis.

― If the vehicle is repaired, troubleshooting is completed.

― If the vehicle is not repaired or additional diagnostic information is not available, replace the PCM. (See PCM REMOVAL/INSTALLATION [MZ-CD 1.6 (Y6)].)