Accord 1985-86 and Prelude 1986-89
If the test result of the CYL sensor or cylinder top dead center sensor is bad, replace them as a block.
1. Disconnect the connector from the crankshaft angle sensor.
2. Measure the resistance between the sensor terminals. The resistance should be 0.65-0.85 kOhm.
3. Measure the insulation resistance between (white and red on a 1985 Accord, white and orange on a 1986 Accord and 1986-89 Prelude) sensor terminal and crankshaft angle sensor housing. The resistance must be 100 kΩ or more.