Toyota Tundra Service Manual: Basic Inspection

CAUTION / NOTICE / HINT

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 performing engine troubleshooting.

PROCEDURE

1.

CHECK BATTERY VOLTAGE

NOTICE:

Conduct this check with the engine stopped and ignition switch off.

Result

Proceed to

11 V or more

OK

Below 11 V

NG

NG

CHARGE OR REPLACE BATTERY

OK

2.

CHECK WHETHER ENGINE WILL CRANK

NG

PROCEED TO PROBLEM SYMPTOMS TABLE

OK

3.

CHECK WHETHER ENGINE STARTS

NG

GO TO STEP 6

OK

4.

CHECK AIR CLEANER FILTER ELEMENT SUB-ASSEMBLY

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

NG

REPLACE AIR CLEANER FILTER ELEMENT SUB-ASSEMBLY

OK

5.

CHECK IDLING SPEED

NG

TROUBLESHOOT IDLING SPEED AND PROCEED TO NEXT STEP

OK

6.

CHECK FUEL PRESSURE

NG

TROUBLESHOOT FUEL PRESSURE AND PROCEED TO NEXT STEP

OK

7.

CHECK FOR SPARK

OK

PROCEED TO PROBLEM SYMPTOMS TABLE

NG

TROUBLESHOOT SPARK AND PROCEED TO NEXT STEP

    ACIS Control Circuit

    Brake Override System

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