NO.21 ENGINE NOISE [SKYACTIV-G 2.0]
| 21 | ENGINE NOISE |
|---|
| DESCRIPTION | Engine noise from under hood. |
| POSSIBLE CAUSE | Squeal, click or chirp noise: Improper engine oil level Loose installation of solenoid valves Improper drive belt tension Generator installation Auto tensioner bearing malfunction Splash shield or under cover loose (splash water to drive belt) Rumble or grinding sound noise: Improper drive belt tension Loose parts Fluid level low or air in power steering fluid Hiss sound noise: Vacuum leakage Loose spark plug Air leakage from the intake-air system Rattle noise: Loose parts Rap or roar noise: Dynamic damper loose Exhaust system loose Intake-air system loose Other noise: Electric variable valve timing actuator malfunction Hydraulic variable valve timing actuator malfunction Timing chain noise Tappet noise 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 SERVICE PRECAUTION" and "AFTER SERVICE PRECAUTION" described in this manual. (See BEFORE SERVICE PRECAUTION [SKYACTIV-G 2.0] ). (See AFTER SERVICE PRECAUTION [SKYACTIV-G 2.0] ). CAUTION: Disconnecting/connecting the quick release connector without cleaning it may possibly cause damage to the fuel pipe and quick release connector. Always clean the quick release connector joint area before disconnecting/connecting, and make sure that it is free of foreign material. |
| 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 SERVICE PRECAUTION" and "AFTER SERVICE PRECAUTION" described in this manual. (See BEFORE SERVICE PRECAUTION [SKYACTIV-G 2.0] ). (See AFTER SERVICE PRECAUTION [SKYACTIV-G 2.0] ). |
| CAUTION |
|---|
| Disconnecting/connecting the quick release connector without cleaning it may possibly cause damage to the fuel pipe and quick release connector. Always clean the quick release connector joint area before disconnecting/connecting, and make sure that it is free of foreign material. |
DESCRIPTION & POSSIBLE CAUSE
NO.22 VIBRATION CONCERNS (ENGINE) [SKYACTIV-G 2.0]
| 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 |
DESCRIPTION & POSSIBLE CAUSE
Vibration Method
- If a malfunction occurs or becomes worse while driving on a rough road or when the engine is vibrating, perform the steps below. NOTE: There are several reasons why the vehicle or engine vibration could cause an electrical malfunction. Check the following: Connectors are not fully seated. Wiring harnesses do not have full play. Wires laying across brackets or moving parts. Wires routed too close to hot parts. An improperly routed, improperly clamped, or loose harness can cause a wiring harness to become pinched between parts. The connector joints, points of vibration, and places where the wiring harnesses pass through the firewall and body panels are the major areas to be checked.
Scheme 103
Scheme 103: Inspection Method for Switch Connectors or Wires
- Connect the M-MDS to the DLC-2.
- Switch the ignition ON (engine off). NOTE: If engine starts and runs, perform the following steps during idle.
- Access the PIDs for the switch you are inspecting.
- Turn the switch on manually.
- Slightly shake each connector or wiring harness vertically and horizontally while monitoring the PID. If the PID value is unstable, check for a poor connection. see scheme 15: Shaking Each Connector Or Wiring Harness Horizontally
Scheme 104
Scheme 104: Inspection Method for Sensor Connectors or Wires
- Connect the M-MDS to the DLC-2.
- Switch the ignition ON (engine off). NOTE: If the engine starts and runs, perform the following steps during idling.
- Access the PIDs for the switch you are inspecting.
- Slightly shake each connector or wiring harness vertically and horizontally while monitoring the PID. If the PID value is unstable, check for poor connection. see scheme 16: Shaking Each Connector Or Wiring Harness Vertically
