20738123 Volvo.Penta Cylinder head gasket

Table 1
J1939 Code and Description Comments
1393-5
Engine Cylinder #1 Ignition Transformer Secondary Output : Current Below Normal 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.
1394-5
Engine Cylinder #2 Ignition Transformer Secondary Output : Current Below Normal When the engine is running, the ECM detects a low current flow in the primary circuit for the ignition transformer.
The code is logged.
1395-5
Engine Cylinder #3 Ignition Transformer Secondary Output : Current Below Normal When the engine is running, the ECM detects a low current flow in the primary circuit for the ignition transformer.
The code is logged.
1396-5
Engine Cylinder #4 Ignition Transformer Secondary Output : Current Below Normal When the engine is running, the ECM detects a low current flow in the primary circuit for the ignition transformer.
The code is logged.
1397-5
Engine Cylinder #5 Ignition Transformer Secondary Output : Current Below Normal When the engine is running, the ECM detects a low current flow in the primary circuit for the ignition transformer.
The code is logged.
1398-5
Engine Cylinder #6 Ignition Transformer Secondary Output : Current Below Normal When the engine is running, the ECM detects a low current flow in the primary circuit for the ignition transformer.
The code is logged.
1399-5
Engine Cylinder #7 Ignition Transformer Secondary Output : Current Below Normal When the engine is running, the ECM detects a low current flow in the primary circuit for the ignition transformer.
The code is logged.
1400-5
Engine Cylinder #8 Ignition Transformer Secondary Output : Current Below Normal When the engine is running, the ECM detects a low current flow in the primary circuit for the ignition transformer.
The code is logged.
1401-5
Engine Cylinder #9 Ignition Transformer Secondary Output : Current Below Normal When the engine is running, the ECM detects a low current flow in the primary circuit for the ignition transformer.
The code is logged.
1402-5
Engine Cylinder #10 Ignition Transformer Secondary Output : Current Below Normal When the engine is running, the ECM detects a low current flow in the primary circuit for the ignition transformer.
The code is logged.
1403-5
Engine Cylinder #11 Ignition Transformer Secondary Output : Current Below Normal When the engine is running, the ECM detects a low current flow in the primary circuit for the ignition transformer.
The code is logged.
1404-5
Engine Cylinder #12 Ignition Transformer Secondary Output : Current Below Normal When the engine is running, the ECM detects a low current flow in the primary circuit for the ignition transformer.
The code is logged.
Table 2
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 signal voltage that is not in the acceptable range.
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 signal voltage that is not in the acceptable range.
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 signal voltage that is not in the acceptable range.
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 signal voltage that is not in the acceptable range.
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 signal voltage that is not in the acceptable range.
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 signal voltage that is not in the acceptable range.
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 signal voltage that is not in the acceptable range.
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 signal voltage that is not in the acceptable range.
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 signal voltage that is not in the acceptable range.
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 signal voltage that is not in the acceptable range.
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 signal voltage that is not in the acceptable range.
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 signal voltage that is not in the acceptable range.
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