HOSE AS 3G9363 - Caterpillar

System Operation Description:Use this procedure to troubleshoot a suspected problem with an ignition transformer. Use this procedure if one of the diagnostic codes in Table 1 or Table 2 are active or easily repeated.
Table 1
Diagnostic Codes Table    
Code    Conditions which Generate this Code    System Response    
401-5 Ignition Transformer Secondary #1 : Current Below Normal
402-5 Ignition Transformer Secondary #2 : Current Below Normal
403-5 Ignition Transformer Secondary #3 : Current Below Normal
404-5 Ignition Transformer Secondary #4 : Current Below Normal
405-5 Ignition Transformer Secondary #5 : Current Below Normal
406-5 Ignition Transformer Secondary #6 : Current Below Normal
407-5 Ignition Transformer Secondary #7 : Current Below Normal
408-5 Ignition Transformer Secondary #8 : Current Below Normal
409-5 Ignition Transformer Secondary #9 : Current Below Normal
410-5 Ignition Transformer Secondary #10 : Current Below Normal
411-5 Ignition Transformer Secondary #11 : Current Below Normal
412-5 Ignition Transformer Secondary #12 : Current Below Normal
413-5 Ignition Transformer Secondary #13 : Current Below Normal
414-5 Ignition Transformer Secondary #14 : Current Below Normal
415-5 Ignition Transformer Secondary #15 : Current Below Normal
416-5 Ignition Transformer Secondary #16 : Current Below Normal     With the engine cranking, the Electronic Control Module (ECM) detects a low current flow in the secondary circuit for the ignition transformer.
There is a problem with the transformer ground.
An open circuit in the secondary winding of the transformer
There is a problem with the connection to the spark plug terminal post.
The spark plug has internal damage or an open circuit.
The spark plug gap is too wide.     The status of the transformer secondary output is set to 120 percent.
The alarm output is activated.
The code is logged.    
Table 2
Diagnostic Codes Table    
Code    Conditions which Generate this Code    System Response    
401-6 Ignition Transformer Secondary #1 : Current Above Normal
402-6 Ignition Transformer Secondary #2 : Current Above Normal
403-6 Ignition Transformer Secondary #3 : Current Above Normal
404-6 Ignition Transformer Secondary #4 : Current Above Normal
405-6 Ignition Transformer Secondary #5 : Current Above Normal
406-6 Ignition Transformer Secondary #6 : Current Above Normal
407-6 Ignition Transformer Secondary #7 : Current Above Normal
408-6 Ignition Transformer Secondary #8 : Current Above Normal
409-6 Ignition Transformer Secondary #9 : Current Above Normal
410-6 Ignition Transformer Secondary #10 : Current Above Normal
411-6 Ignition Transformer Secondary #11 : Current Above Normal
412-6 Ignition Transformer Secondary #12 : Current Above Normal
413-6 Ignition Transformer Secondary #13 : Current Above Normal
414-6 Ignition Transformer Secondary #14 : Current Above Normal
415-6 Ignition Transformer Secondary #15 : Current Above Normal
416-6 Ignition Transformer Secondary #16 : Current Above Normal     With the engine cranking, the ECM detects a high current flow in the secondary circuit for the ignition transformer.
A short circuit in the secondary winding of the transformer
The spark plug is fouled.
The spark plug gap is too close.     The status of the transformer secondary output is set to zero percent.
The alarm output is activated.
The code is logged.    The transformers are located on the covers for the valve lifters. Each transformer is grounded to a cover via the transformer mounting flange. The transformers initiate combustion by