SHAFT 3V1025 - Caterpillar

System Operation Description:Use this procedure to troubleshoot a suspected problem with an ignition transformer or 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    
Description    Conditions which Generate this Code    System Response    
301-5 Ignition Transformer Primary #1 : Current Below Normal
302-5 Ignition Transformer Primary #2 : Current Below Normal
303-5 Ignition Transformer Primary #3 : Current Below Normal
304-5 Ignition Transformer Primary #4 : Current Below Normal
305-5 Ignition Transformer Primary #5 : Current Below Normal
306-5 Ignition Transformer Primary #6 : Current Below Normal
307-5 Ignition Transformer Primary #7 : Current Below Normal
308-5 Ignition Transformer Primary #8 : Current Below Normal
309-5 Ignition Transformer Primary #9 : Current Below Normal
310-5 Ignition Transformer Primary #10 : Current Below Normal
311-5 Ignition Transformer Primary #11 : Current Below Normal
312-5 Ignition Transformer Primary #12 : Current Below Normal
313-5 Ignition Transformer Primary #13 : Current Below Normal
314-5 Ignition Transformer Primary #14 : Current Below Normal
315-5 Ignition Transformer Primary #15 : Current Below Normal
316-5 Ignition Transformer Primary #16 : Current Below Normal
1752-5 Ignition Transformer Primary #17 : Current Below Normal
1753-5 Ignition Transformer Primary #18 : Current Below Normal
1754-5 Ignition Transformer Primary #19 : Current Below Normal
1755-5 Ignition Transformer Primary #20 : Current Below Normal     While the engine is started, the Electronic Control Module (ECM) detects a low current flow in the primary circuit for the ignition transformer.     The code is logged.
The alarm output is activated.    
Table 2
Diagnostic Codes Table    
Description    Conditions which Generate this Code    System Response    
301-6 Ignition Transformer Primary #1 : Current Above Normal
302-6 Ignition Transformer Primary #2 : Current Above Normal
303-6 Ignition Transformer Primary #3 : Current Above Normal
304-6 Ignition Transformer Primary #4 : Current Above Normal
305-6 Ignition Transformer Primary #5 : Current Above Normal
306-6 Ignition Transformer Primary #6 : Current Above Normal
307-6 Ignition Transformer Primary #7 : Current Above Normal
308-6 Ignition Transformer Primary #8 : Current Above Normal
309-6 Ignition Transformer Primary #9 : Current Above Normal
310-6 Ignition Transformer Primary #10 : Current Above Normal
311-6 Ignition Transformer Primary #11 : Current Above Normal
312-6 Ignition Transformer Primary #12 : Current Above Normal
313-6 Ignition Transformer Primary #13 : Current Above Normal
314-6 Ignition Transformer Primary #14 : Current Above Normal
315-6 Ignition Transformer Primary #15 : Current Above Normal
316-6 Ignition Transformer Primary #16 : Current Above Normal
1752-6 Ignition Transformer Primary #17 : Current Above Normal
1753-6 Ignition Transformer Primary #18 : Current Above Normal
1754-6 Ignition Transformer Primary #19 : Current Above Normal
1755-6 Ignition Transformer Primary #20 : Current Above Normal     While the engine is started, the ECM detects an excessive current flow in the primary circuit for the ignition transformer.     The code is logged.
The alarm output is activated.    Note: The engine must be running in order for the above diagnostic codes to become active.Systems OperationBoth the master ECM and the slave ECM have internal power circuits that are used to energize the