Toyota Sienna Service Manual: Basic inspection

Toyota Sienna Service Manual / Engine / 2Gr-fe engine control system / Sfi system / Basic inspection

When a malfunction is not confirmed by the DTC check, troubleshooting should be carried out in all circuits considered to be possible causes of the problem. In many cases, by carrying out the basic engine check shown in the following flowchart, the location of the problem can be found quickly and efficiently. Therefore, using this check is essential when engine troubleshooting.

1 CHECK BATTERY VOLTAGE

NOTICE:

Carry out this check with the engine stopped and ignition switch off.

Result

2 CHECK WHETHER ENGINE CRANKS

3 CHECK WHETHER ENGINE STARTS

4 CHECK AIR FILTER

(a) Visually check that the air filter is not excessively contaminated with dirt or oil.

5 CHECK IDLING SPEED

(a) Check the idling speed (See page EM-2).

6 CHECK FUEL PRESSURE

(a) Check the fuel pressure (See page FU-7).

7 CHECK FOR SPARKS

(a) Check for sparks (See page ES-217).

PROCEED TO PROBLEM SYMPTOMS TABLE

Check for intermittent problems

1. CHECK FOR INTERMITTENT PROBLEMS HINT: For use of the intelligent tester only: Inspect the vehicle's ECM using check mode. Intermittent problems are easier to detect with an intelligent teste ...

Registration

NOTICE:The Vehicle Identification Number (VIN) must be input into the replacement ECM. HINT: The VIN is a 17-digit alphanumeric vehicle identification number. The intelligent tes ...

Other materials:

TS and CG Terminal Circuit
DESCRIPTION The Test Mode (signal check) circuit detects trouble in the sensor or switch signal, which cannot be detected by the DTC check. Connecting terminals TS and CG of the DLC3 starts the check. WIRING DIAGRAM INSPECTION PROCEDURE 1 CHECK HARNESS AND CONNECTOR (BETWEEN SKID CONTR ...

Catalyst System Efficiency Below Threshold
MONITOR DESCRIPTION The ECM uses the sensors mounted in front of and behind the three-way catalyst (TWC) to monitor its efficiency. The first sensor, an Air Fuel ratio (A/F) sensor, sends pre-catalyst A/F ratio information to the ECM. The second sensor, a heated oxygen sensor (O2S), sends ...

Vehicle exterior
Items Check points Doors Do the doors operate smoothly? Engine hood Does the engine hood lock system work properly? Fluid leaks There should not be any signs of fluid leakage after the vehicle ha ...