50212-ZV0-010 Honda SEE PART DETAILS - PRI; BLOCK, FRICTION (Honda Code 2031052).

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.The Electronic Control Module (ECM) has internal circuit drivers for the ignition transformers. Each circuit driver creates a signal of +108 V. The signal goes to the primary circuits of the ignition transformers. The secondary circuits for the ignition transformers deliver high voltage (8,000 to 37,000 V) to the spark plugs. The external ignition wiring is continuous from the ECM connector to the bulkhead connectors that are located on the front face of the engine. The ignition wiring is inside the engine from the bulkhead connector to the individual transformers.Some power circuits and returns are shared. Therefore, a single problem will generate either only one diagnostic code or multiple codes.Power for the Ignition Transformer PrimarySome power circuits send signals to a single cylinder. A high side short circuit will affect only that cylinder.Some power circuits send signals to more than one cylinder. For this reason, a high side short circuit will affect more than one cylinder.Return for the Ignition Transformer PrimaryThe ECM has internal returns for the ignition transformers. Some of the returns consist of groups of terminals that are connected via diodes inside the ECM. This means that a return short circuit to the +Battery will simultaneously affect all of the cylinders that are grouped.Refer to Tables 3, 4and 5 for the combinations of cylinders that can be affected by a condition.
Table 3
Wiring Faults and the Combinations of Cylinders that are Affected on 16 cylinders
Wiring Fault Cylinders
Open circuit in the driver side Only one cylinder is affected.
Return side open
Return side short to ground
Cylinder 1 or 15
Short circuit to +Battery on the driver side 1 and 15
Cylinder 2 or 16
Short circuit to +Battery on the driver side 2 and 16
Cylinder 3 or 13
Short circuit to +Battery on the driver side 3 and 13
Cylinder 4 or 14
Short circuit to +Battery on the driver side 4 and 14
Cylinder 5 or 11
Short circuit to +Battery on the driver side 5 and 11
Cylinder 6 or 12
Short circuit to +Battery on the driver side 6 and 12
Cylinder 7 or 9
Short circuit to +Battery on the driver side 7 and 9
Cylinder 8 or 10
Short circuit to +Battery on the driver side 8 and 10
Return side short to +Battery 1, 3, 5, and 9
2, 4, 6, and 10
7, 11, 13, and 15
8, 12, 14, and 16
Table 4
Wiring Faults and the Combinations of Cylinders that are Affected on 12 Cylinder Engines
Wiring Fault Affected Cylinders
Open on the driver side Only one cylinder is affected.
Return side open
Return side short to ground
Cylinder 1 or 11
Short to +Battery on the driver side 1 and 11
Cylinder 2 or 12
Short to +Battery on the driver side 2 and 12
Cylinder 3 or 9
Short to +Battery on the driver side 3 and 9
Cylinder 4 or 10
Short to +Battery on the driver side 4 and 10
Cylinder 5 or 7
Short to +Battery on the driver side 5 and 7
Cylinder 6 or 8
Short to +Battery on the driver side 6 and 8
Return side short to +Battery 1, 5, and 9
2, 6, and 10
3, 7, and 11
4, 8, and 12