Also, check the Wht/Grn wire for 12 volts at the main relay harness connector.

 

ok so I have made a decision , the ecu just isnt getting any power ... I hooked my 12v wire to the wire I ran for the alternator 12v and it started up ... but if I disconnect the wire the whole car shuts down .

 

i was able to run my obd2 and i got the codes 1591 and 1705 plus my tcs light is on now and wont reset

 

Sounds like you just have to re-route two separate 12 volt wires; one to the alternator and one to the PCM.

The junction connector is where they should have originally split (from one of my early posts in this thread); but, it is a little difficult to access.

 

12v at relay ...

 

P1705 is Transmission Range Switch (short to ground). P1591 is not a listed code for your model year, it is a generic OBD code also related to the Transmission Range Switch.

Check the connector and wiring for Connector D at the PCM; however, these codes may be related to the power issue. Connector D is has the harness wires that run between the PCM and transmission range switch.

 

I like how illustrated you are .. thank god for people like you otherwise people like me would be in trouble ..

 

Not sure if the P1705 trouble code and the TCS light on may be related due to the circuits. The following may mean nothing in regards to your issue.

Looking at the circuit diagrams, Fuse No. 6 has a different Blk/Yel wire to the Cruise Control/TCS Switch (located on the dash).

• With the TCS switch on, one wire from the switch sends an input signal goes to the ABS/TCS Control Unit.
• With the Cruise Control switch on, a different wire sends a power input to the Cruise Control Unit.

The transmission range switch has a disengage input wire that runs to the Cruise Control Unit.

 

Hi Red , and everyone else , I have a question regarding the underhood fuse box , attached is a picture, just trying to find out what they are and if they relate to my starting / driving problems

 

See attached image of notes I added to your photo.

The Electronic Load Detector (ELD) unit is part of the charging system circuit. So, yes it can be a source of your problem.

Honda's utilizes a dual mode charging system to increase fuel efficiency and reduce drag on the engine on start-up. The ECM/PCM determines charging based on info. from the ELD. During heavy load, the ECM/PCM can set charging voltage for high output (~14V - 15V). During light load and start-up, the ECM/PCM sets charging voltage for low output (~12 - 13V). The ECM/PCM can control charge modes (high or low output).

The Blk/Yel wire to the ELD unit should also have ~12 volts from driver's dash fuse no. 6, with the ignition in ON or START.