0209364 JOHNSON OWNER'S MANUAL 75 TNT

Table 1
Diagnostic Codes Table    
Description    Conditions which Generate this Code    System Response    
1501-3 Cylinder #1 Detonation Sensor : Voltage Above Normal     The Electronic Control Module (ECM) has detected a voltage on the signal line of the sensor that is greater than the trip point for more than ten seconds.     The code is logged.
The alarm output is activated.
The shutdown output is activated.
The engine is shut down.    
1501-4 Cylinder #1 Detonation Sensor : Voltage Below Normal