NO.21 ENGINE NOISE [L3 WITH TC]
| 21 | ENGINE NOISE |
|---|
| DESCRIPTION | Engine noise under hood |
| POSSIBLE CAUSE | Squeal, click or chirp noise: Improper engine oil level Loose installation of solenoid valves Improper drive belt tension Rumble or grinding sound noise: Loose parts Fluid revel low or air in power the steering fluid Improper drive belt tension Hiss sound noise: Vacuum leakage Loose spark plug Air leakage from the intake-air system Rattle noise: Loose parts Rap or roar noise: Exhaust system looseness Excessive noise from turbocharger Foreign objects or material in the compressor inlet to the intake manifold ducting or the compressor housing Carbon built-up in the turbine housing Turbocharger routing assembly banding or dragging Loose intake or exhaust ducting systems Other noise: Camshaft friction gear noise or MLA noise Timing chain 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 REPAIR PROCEDURE" and "AFTER REPAIR PROCEDURE" described in this manual. (See BEFORE SERVICE PRECAUTION [L3 WITH TC] .) (See AFTER SERVICE PRECAUTION [L3 WITH TC] .) 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 REPAIR PROCEDURE" and "AFTER REPAIR PROCEDURE" described in this manual. (See BEFORE SERVICE PRECAUTION [L3 WITH TC] .) (See AFTER SERVICE PRECAUTION [L3 WITH TC] .) |
| 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. |
ENGINE NOISE [L3 WITH TC] DESCRIPTION REFERENCE
NO.22 VIBRATION CONCERNS (ENGINE)[L3 WITH TC]
| 22 | VIBRATION CONCERNS (ENGINE) |
|---|
| DESCRIPTION | Vibration from under the hood or driveline |
| POSSIBLE CAUSE | Loose attaching bolts or worn parts Components malfunction such as worn parts |
VIBRATION CONCERNS (ENGINE)[L3 WITH TC] DESCRIPTION REFERENCE
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 42
Scheme 42: Inspection Method for Switch Connectors or Wires
- Connect the M-MDS to the DLC-2.
- Turn the ignition switch to the ON position (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.
Scheme 43
Scheme 43: Inspection Method for Sensor Connectors or Wires
- Connect the M-MDS to the DLC-2.
- Turn the ignition switch to the ON position (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.
