843868 Volvo.Penta Fan, suction type

Table 1
J1939 Code and Description Comments
1393-15
Engine Cylinder #1 Ignition Transformer Secondary Output : High - least severe (1) When the engine is running, the Electronic Control Module (ECM) detects a low current flow in the primary circuit for the ignition transformer.
The code is logged.
1394-15
Engine Cylinder #2 Ignition Transformer Secondary Output : High - least severe (1) When the engine is running, the ECM detects a low current flow in the primary circuit for the ignition transformer.
The code is logged.
1395-15
Engine Cylinder #3 Ignition Transformer Secondary Output : High - least severe (1) When the engine is running, the ECM detects a low current flow in the primary circuit for the ignition transformer.
The code is logged.
1396-15
Engine Cylinder #4 Ignition Transformer Secondary Output : High - least severe (1) When the engine is running, the ECM detects a low current flow in the primary circuit for the ignition transformer.
The code is logged.
1397-15
Engine Cylinder #5 Ignition Transformer Secondary Output : High - least severe (1) When the engine is running, the ECM detects a low current flow in the primary circuit for the ignition transformer.
The code is logged.
1398-15
Engine Cylinder #6 Ignition Transformer Secondary Output : High - least severe (1) When the engine is running, the ECM detects a low current flow in the primary circuit for the ignition transformer.
The code is logged.
1399-15
Engine Cylinder #7 Ignition Transformer Secondary Output : High - least severe (1) When the engine is running, the ECM detects a low current flow in the primary circuit for the ignition transformer.
The code is logged.
1400-15
Engine Cylinder #8 Ignition Transformer Secondary Output : High - least severe (1) When the engine is running, the ECM detects a low current flow in the primary circuit for the ignition transformer.
The code is logged.
1401-15
Engine Cylinder #9 Ignition Transformer Secondary Output : High - least severe (1) When the engine is running, the ECM detects a low current flow in the primary circuit for the ignition transformer.
The code is logged.
1402-15
Engine Cylinder #10 Ignition Transformer Secondary Output : High - least severe (1) When the engine is running, the ECM detects a low current flow in the primary circuit for the ignition transformer.
The code is logged.
1403-15
Engine Cylinder #11 Ignition Transformer Secondary Output : High - least severe (1) When the engine is running, the ECM detects a low current flow in the primary circuit for the ignition transformer.
The code is logged.
1404-15
Engine Cylinder #12 Ignition Transformer Secondary Output : High - least severe (1) When the engine is running, the ECM detects a low current flow in the primary circuit for the ignition transformer.
The code is logged.
1405-15
Engine Cylinder #13 Ignition Transformer Secondary Output : High - least severe (1) When the engine is running, the ECM detects a low current flow in the primary circuit for the ignition transformer.
The code is logged.
1406-15
Engine Cylinder #14 Ignition Transformer Secondary Output : High - least severe (1) When the engine is running, the ECM detects a low current flow in the primary circuit for the ignition transformer.
The code is logged.
1407-15
Engine Cylinder #15 Ignition Transformer Secondary Output : High - least severe (1) When the engine is running, the ECM detects a low current flow in the primary circuit for the ignition transformer.
The code is logged.
1408-15
Engine Cylinder #16 Ignition Transformer Secondary Output : High - least severe (1) When the engine is running, the ECM detects a low current flow in the primary circuit for the ignition transformer.
The code is logged. The ignition transformers initiate combustion by providing high voltage to the spark plugs. The output from the secondary circuit of the transformer provides voltage to the terminals of the spark plug. The transformers are located underneath the valve covers. Each transformer is grounded to a valve cover via a ground spring.The secondary circuit of the transformer provides an initial 8,000 to 37,000 V to the spark plug. This voltage ionizes the air that is in the spark plug gap and this action generates a spark in the air gap. This voltage is then reduced to about 1,000 V. The total duration of the spark is approximately 400 microseconds.Each Electronic Control Module (ECM) can diagnose the primary circuit of the ignition transformers for open circuits and/or for short circuits. Secondary open circuits and short circuits will not directly shutdown the engine. However, these conditions may lead to misfire which can cause lugging of the engine. Lugging of the engine can cause a shutdown.Note: Ignition transformers that are used with Electronic Ignition Systems (EIS) are not interchangeable with the transformers that are used with ADEM III and up systems. Be sure not to interchange these components on any engine.Caterpillar spark plugs are high-voltage devices with internal resistors. The spark plugs operate at a voltage that is greater than 5,000 V.Most ignition systems are affected by resistance in the secondary circuit. If a measurement of the resistance is desired, a megohmmeter must be used. A low voltage multimeter will not provide a reliable reading of the resistance because oxidation of the spark plug internal components will affect the readings for those meters.If a diagnostic code is generated for the ignition transformer's secondary circuit, the spark plug may need to be replaced. Misfire and a cold cylinder are other indications of a worn spark plug. Use Cat ET to monitor the exhaust port temperatures in order to locate a cold cylinder.The service life of the spark plugs is affected by fouling due to deposits from the oil and by peak voltage. Maintenance of the ignition system is also affected by voltage. Higher voltage is required by higher inlet manifold air pressure, a higher compression ratio, or retardation of the timing. Higher voltage reduces the service life of components such as spark plugs, wires, and transformers.To help predict the spark plug's service life, use Cat ET to monitor the secondary voltage. The value is expressed as a percent of secondary voltage. The value increases as the spark plug gap wears over time. A new spark plug is at 0 percent. A value over 90