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6E–156 4JH1 ENGINE DRIVEABILITY AND EMISSIONS 6 Using the DVM and check the CKP sensor signal. 1. Ignition “On”, engine “On”. 2. Measure the CKP output voltage at the sensor and ECM. Does the tester indicate standard voltage? If a oscilloscope is available, monitor the CKP sensor Go to Step 9 Go to Step 7 7 Remove the CKP sensor from the flywheel housing • Objects sticking the CKP sensor. • Objects sticking the CKP sensor pulser. — Verify repair Go to Step 8 8 Check the CKP sensor shield wire for open or short — Repair faulty verify repair Go to Step 9 9 Check any accessory parts which may cause electric — Remove the accessory parts and verify repair Go to Step 10 10 Substitute a known good CKP sensor and recheck. — Go to Step 11 Go to Step 12 11 Replace the CKP sensor. — Verify repair Go to Step 12 12 Is the ECM programmed with the latest software — Verify repair Go to Step 13 Step Action Value(s) Yes No Measurement Point Voltage (V) (AC Range) At CKP sensor terminal 2 & 1 Approximately 1.0 V at At ECM C57 connector 90 & 98 CKP Sensor Reference Wave Form 0V → Measurement Terminal: 90 (+) 98(-) 2.0ms/div Measurement Condition: Engine speed at 2000rpm |