Diesel Data: Automotive Repair

Idle Speed: Testing and Inspection

INSPECT ENGINE IDLE SPEED

a) Warm up the engine.





b) When using the hand-held tester:
Check the idle speed.
1) Connect the hand-held tester to the DLC3.
2) Enter DATA LIST MODE on the hand-held tester.
Idle speed: 630 to 730 rpm

NOTICE:
^ When checking the idle speed, the transmission should be in the neutral position.
^ Check the idle speed with the cooling fan off.
^ Switch off all accessories and air conditioning before connecting the hand-held tester.

HINT: Please refer to the hand-held tester operator's manual for further details.

c) When not using the hand-held tester: Check the idle speed.





1) Using SST, connect tachometer test probe to terminal 9 (TAC) of the DLC3.
SST 09843-18030
2) Check the idle speed.
Idle speed: 630 to 730 rpm