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6E–320 4JH1 ENGINE DRIVEABILITY AND EMISSIONS 19 Remove the CKP sensor from the flywheel housing • Objects sticking the CKP sensor. • Objects sticking the CKP sensor pulser. — Verify repair Go to Step 20 20 Check the CKP sensor harness for the following • Check for poor connector connection. • Check for misrouted harness. • Check for any accessory parts which may cause electric interference. If a problem is found, repair as necessary. — Verify repair Go to Step 21 21 Substitute a known good CKP sensor and recheck. — Go to Step 22 Go to Step 23 22 Replace the CKP sensor. — Verify repair — 23 1. Using the Tech 2 and ignition “On” and engine “Run”. 2. Monitor the following parameters in the data display. • “Desired Injection Quantity” & “Injection Quantity” • “Desired Injection Start” & “Actual Injection Start” — Go to Step 25 Go to Step 24 24 Using the vacuum pump and check the EGR valve (if • Restrict shaft movement. Check for objects sticking the shaft, broken diaphragm or excessive carbon If a problem is found, repair as necessary. Was a problem found? — Verify repair Go to Step 25 Step Action Value(s) Yes No When idling or part-throttle When accelerated
High Desired Low Time Actual High Low Desired Actual Time Vacuum Pump Small Window |