1. Prepare an oscilloscope.
2. Disconnect the ground cable from battery.
3. Disconnect the connector from ECM.
4. Set the ST between the ECM and body harness. 
| ST 18460AA020 | CHECK BOARD |
5. Connect the ground cable to battery.
6. Connect the oscilloscope to the check board connector.
Terminals:
Positive tester probe
No. 42
Ground harness
No. 18
7. Start the engine and let it idle.
8. Check that the oscilloscope pattern is as same as the waveform and voltage shown below.
|
(A) |
One camshaft rotation |
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