Lexus NX: Basic Inspection

CAUTION / NOTICE / HINT

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

PROCEDURE

1.

CHECK AUXILIARY BATTERY VOLTAGE

NOTICE:

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

Result

Proceed to

11 V or higher

OK

Below 11 V

NG

NG

CHARGE OR REPLACE AUXILIARY BATTERY

OK

2.

CHECK WHETHER ENGINE CRANKS

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 cleaner filter element sub-assembly is not excessively contaminated with dirt or oil.

NG

REPLACE AIR CLEANER FILTER ELEMENT SUB-ASSEMBLY

OK

5.

CHECK IDLING SPEED

(a) Check the engine idling speed.

Click here

NG

TROUBLESHOOT IDLING SPEED AND PROCEED TO NEXT STEP

OK

6.

CHECK FUEL PRESSURE

(a) Check the fuel pressure.

Click here

NG

TROUBLESHOOT FUEL PRESSURE AND PROCEED TO NEXT STEP

OK

7.

CHECK FOR SPARK

(a) Perform a spark test.

Click here

OK

PROCEED TO PROBLEM SYMPTOMS TABLE

NG

TROUBLESHOOT SPARK AND PROCEED TO NEXT STEP

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