| Last Modified: 11-29-2007 | 1.6 T | |
| Service Category: Engine/Hybrid System | Section: Engine Control | |
| Model Year: 2008 | Model: Sequoia | Doc ID: RM000000PDG06KX |
| Title: 3UR-FE ENGINE CONTROL: SFI SYSTEM: PROBLEM SYMPTOMS TABLE (2008 Sequoia) | ||
PROBLEM SYMPTOMS TABLE
HINT:
- Use the table below to help determine the cause of problem symptoms. If multiple suspected areas are listed, the potential causes of the symptoms are listed in order of probability in the "Suspected Area" column of the table. Check each symptom by checking the suspected areas in the order they are listed. Replace parts as necessary.
- Inspect the fuses and relays related to this system before inspecting the suspected areas below.
SFI System
|
Symptom |
Suspected Area |
See page |
|---|---|---|
|
Engine does not crank (Does not start) |
Battery |
|
|
Starter |
|
|
|
Cranking Holding Function Circuit |
|
|
|
Starter relay |
|
|
|
Park/Neutral Position Switch (for 2WD) |
|
|
|
Park/Neutral Position Switch (for 4WD) |
|
|
|
Immobiliser System |
|
|
|
No initial combustion (Does not start) |
ECM Power Source Circuit |
|
|
Crankshaft Position Sensor |
|
|
|
Camshaft Position Sensor |
|
|
|
Ignition System |
|
|
|
Fuel Pump Control Circuit |
|
|
|
Fuel Injector Circuit |
|
|
|
ECM |
|
|
|
VC Output Circuit |
|
|
|
Engine cranks normally but difficult to start |
Fuel Pump Control Circuit |
|
|
Compression |
|
|
|
Difficult to start with cold engine |
Ignition System |
|
|
Spark Plug |
|
|
|
Fuel Pump Control Circuit |
|
|
|
Injector |
|
|
|
Difficult to start with warm engine |
Injector |
|
|
Ignition System |
|
|
|
Spark Plug |
|
|
|
Fuel Pump Control Circuit |
|
|
|
High engine idle speed |
Electronic Throttle Control System |
|
|
A/C Signal Circuit |
|
|
|
ECM Power Source Circuit |
|
|
|
Acoustic Control Induction System (ACIS) |
|
|
|
Low engine idle speed (Poor idling) |
Electronic Throttle Control System |
|
|
A/C Signal Circuit |
|
|
|
Fuel Pump Control Circuit |
|
|
|
Air Induction System |
|
|
|
Acoustic Control Induction System (ACIS) |
|
|
|
PCV Hose |
|
|
|
Rough idling |
Compression |
|
|
Spark Plug |
|
|
|
Injector |
|
|
|
Ignition System |
|
|
|
Fuel Pump Control Circuit |
|
|
|
Electronic Throttle Control System |
|
|
|
Air Induction System |
|
|
|
Acoustic Control Induction System (ACIS) |
|
|
|
PCV Hose |
|
|
|
Mass Air Flow Meter |
|
|
|
Idle hunting |
Electronic Throttle Control System |
|
|
Air Induction System |
|
|
|
ECM Power Source Circuit |
|
|
|
Acoustic Control Induction System (ACIS) |
|
|
|
Hesitation/Poor acceleration |
Fuel Pump Control Circuit |
|
|
Spark Plug |
|
|
|
Ignition System |
|
|
|
Injector |
|
|
|
Mass Air Flow Meter |
|
|
|
Electronic Throttle Control System |
|
|
|
Air Induction System |
|
|
|
Compression |
|
|
|
Surging (Poor driveability) |
Spark Plug |
|
|
Fuel Pump Control Circuit |
|
|
|
Ignition System |
|
|
|
Injector |
|
|
|
Mass Air Flow Meter |
|
|
|
Variable Valve Timing System |
|
|
|
Compression |
|
|
|
Engine stalls soon after starting |
Fuel Pump Control Circuit |
|
|
Spark Plug |
|
|
|
Ignition System |
|
|
|
Injector |
|
|
|
Variable Valve Timing System |
|
|
|
Electronic Throttle Control System |
|
|
|
Air Induction System |
|
|
|
PCV Hose |
|
|
|
Compression |
|
|
|
Engine stalls only during A/C operation |
A/C Signal Circuit |
|
|
ECM |
|
|
|
Unable/difficult to refuel |
Refueling Valve (Canister) |
- |
|
|