NO.22 VIBRATION CONCERNS (ENGINE) [MZR-CD (RF Turbo)]


22	VIBRATION CONCERNS (ENGINE)
DESCRIPTION	• Vibration from under hood or driveline.
POSSIBLE CAUSE	• Loose attaching bolts or worn parts • Components malfunction such as worn parts • Erratic signal from CKP sensor • Erratic signal from CMP sensor • ECT sensor or related circuit malfunction • Accelerator position sensor or related circuit malfunction • MAF/IAT sensor or related circuit malfunction • Idle switch or related circuit malfunction • Incorrect adjustment of accelerator position sensor and/or idle switch • Fuel injector malfunction • Vacuum leakage 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.


STEP	INSPECTION	RESULTS	ACTION
1	Inspect following components for loose attaching bolts or worn parts: • Main fan • Additional fan • Drive belt and pulley • Engine mounts • Exhaust system Are all items okay?	Yes	Go to next step.
1		No	Readjust or retighten engine mount installation position. Service as necessary for other parts.
2	Inspect vacuum leakage. Are vacuum hoses okay?	Yes	Go to next step.
2	Inspect vacuum leakage. Are vacuum hoses okay?	No	Service as necessary. Repeat Step 2.
3	Connect WDS or equivalent to DLC-2. Turn engine switch to ON. Retrieve any DTC. Is DTC displayed?	Yes	DTC is displayed: Go to appropriate DTC test. Communication error message is displayed: Inspect followings: • Open circuit between PCM control relay and PCM terminal 53 or 79 • Open circuit PCM control relay and PCM terminal 69 • PCM control relay stuck open • Open or poor GND circuit (PCM terminal 65, 85, 103 or 104) • Poor connection vehicle body GND
3		No	No DTC is displayed: Go to next step.
4	Visually inspect CKP sensor and teeth of pulse wheel. Are CKP sensor and teeth of pulse wheel okay?	Yes	Go to next step.
4		No	Replace malfunctioning parts.
5	Measure gap between CKP sensor and teeth of pulse wheel. Specification 1.5-2.5 mm {0.059-0.098 in} Is gap within specification?	Yes	Go to next step.
5		No	Adjust CKP sensor position.
6	Inspect adjustment of accelerator position sensor and idle switch. (See ACCELERATOR POSITION SENSOR INSPECTION [MZR-CD (RF Turbo)].) (See IDLE SWITCH INSPECTION [MZR-CD (RF Turbo)].) Are accelerator position sensor and idle switch adjusted correctly?	Yes	Go to next step.
6		No	Adjust accelerator position sensor and idle switch correctly. (See ACCELERATOR POSITION SENSOR ADJUSTMENT [MZR-CD (RF Turbo)].) (See IDLE SWITCH ADJUSTMENT [MZR-CD (RF Turbo)].)
7	Inspect adjustment of neutral switch. (See NEUTRAL SWITCH INSPECTION [MZR-CD (RF Turbo)].) Is neutral switch adjusted correctly?	Yes	Go to next step.
7		No	Adjust neutral switch correctly.
8	Visually inspect CMP sensor and teeth of pulse wheel. Are CMP sensor and teeth of pulse wheel okay?	Yes	Inspect following PIDs: (See PCM INSPECTION [MZR-CD (RF Turbo)].) • ECT • IAT • MAF • RPM If PID value is not as specified, repair or replace malfunctioning parts. If PID value is okay, go to next step.
8		No	Replace malfunctioning parts.
9	Inspect fuel injector. (See FUEL INJECTOR INSPECTION [MZR-CD (RF Turbo)].) Is fuel injector okay?	Yes	Inspect following systems: • Wheels • Transmission and mounts • Driveline • Suspension Service as necessary.
9		No	Repair or replace as necessary.
10	Verify test results. • If okay, return to diagnostic index to service any additional symptoms. • If malfunction remains, replace PCM. (See PCM REMOVAL/INSTALLATION [MZR-CD (RF Turbo)].)