STEP 1. Using the oscilloscope, measure output wave pattern at crankshaft position sensor and camshaft position sensor.
(1) Disconnect the crankshaft position sensor connector and connect the test harness special tool (MB991709) between the separated connectors.
(2) Connect the oscilloscope probe to the crankshaft position sensor side connector terminal SGT line.
(3) Disconnect the camshaft position sensor connector, and connect test harness special tool (MB991709) between the separated connectors.
(4) Connect the oscilloscope probe to the camshaft position sensor side connector terminal CPI line.note | When measuring with the ECM side connector, disconnect all ECM connectors. Connect the check harness special tool (MB992110) between the separated connectors. Then connect the oscilloscope probe to the check harness connector terminal SGT (crankshaft position sensor) and terminal CPI (camshaft position sensor). |
(5) Start the engine and run at idle.
(6) Check the waveform.- The waveforms should be displayed on inspection procedure using an oscilloscope (Refer to ).
(7) Turn the ignition switch to the "LOCK" (OFF) position.
Is the waveform normal?
Go to Step 2. Go to Step 3.