Civic LX 93 a/t check engine light takes 20s to turn off
#1
Civic LX 93 a/t check engine light takes 20s to turn off
Hi guys
I changed my ECU recently and when the car stays 2/3 days without engine turned on, check engine light stays on for 20 / 30 seconds. After I listen fuel pump prime, the light turns off and engine can work.
I changed my ECU recently and when the car stays 2/3 days without engine turned on, check engine light stays on for 20 / 30 seconds. After I listen fuel pump prime, the light turns off and engine can work.
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#7
Re: Civic LX 93 a/t check engine light takes 20s to turn off
Civic now stopped and won't start.
Hi, I did the A7 test.
Disconnected A plug
Inserted a jumper wire on A7 plug
Ground this wire on metal under dashboard
Fuel pump didnt prime
Tested main relay wire
Jump wire pin 5 to 7. Fuel pump run
Jump wire pin 1 to 7. Fuel pump run
Jump wire pin 5 and 1 to 7. Fuel pump run and this mode I tried to start engine but it crank and dont start.
Hi, I did the A7 test.
Disconnected A plug
Inserted a jumper wire on A7 plug
Ground this wire on metal under dashboard
Fuel pump didnt prime
Tested main relay wire
Jump wire pin 5 to 7. Fuel pump run
Jump wire pin 1 to 7. Fuel pump run
Jump wire pin 5 and 1 to 7. Fuel pump run and this mode I tried to start engine but it crank and dont start.
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#8
Re: Civic LX 93 a/t check engine light takes 20s to turn off
Have you resoldered the main relay and also cleaned and tightened the G101 ground connection on the thermostat housing?
Main Relay Fix, Troubleshooting (Honda, Acura) and how to solder
https://youtu.be/qMpgmzGhJeE
Main Relay Fix, Troubleshooting (Honda, Acura) and how to solder
https://youtu.be/qMpgmzGhJeE
#9
Re: Civic LX 93 a/t check engine light takes 20s to turn off
Have you resoldered the main relay and also cleaned and tightened the G101 ground connection on the thermostat housing?
Main Relay Fix, Troubleshooting (Honda, Acura) and how to solder
Main Relay Fix, Troubleshooting (Honda, Acura) and how to solder
I have 2 main relay: old mitsuba and a brand new. Mitsuba I redid resoldering and the brand new the points is all ok. I checked this G101 gnd yesterday and it seems ok. Now my civic is on the sidewalk and dont wanna go to the garage :-(
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#16
Re: Civic LX 93 a/t check engine light takes 20s to turn off
The wire at A7 runs to pin 8 (Grn/Yel wire) of the main relay.
With the key in ON(II), what voltage do you measure when back probing the Grn/Yel wire at pin 8? The main relay must remain plugged in for this test.
With the key in ON(II), what voltage do you measure when back probing the Grn/Yel wire at pin 8? The main relay must remain plugged in for this test.
#18
Re: Civic LX 93 a/t check engine light takes 20s to turn off
Turn key OFF.
Unplug ECU connector A.
Check for continuity to body ground at pins A23 and A24 (black wires) in the ECU connector.
Unplug ECU connector A.
Check for continuity to body ground at pins A23 and A24 (black wires) in the ECU connector.
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#24
Re: Civic LX 93 a/t check engine light takes 20s to turn off
You found the problem.
The black wires must be grounded at G101 on the thermostat housing. The black wires merge and run as one black wire to a 14P connector on the left side of the engine bay and a 20P connector on the left shock tower. Maybe one of the connectors is not fully seated.
The black wires must be grounded at G101 on the thermostat housing. The black wires merge and run as one black wire to a 14P connector on the left side of the engine bay and a 20P connector on the left shock tower. Maybe one of the connectors is not fully seated.
Last edited by Former User; 10-08-2016 at 05:10 PM.
#25
Re: Civic LX 93 a/t check engine light takes 20s to turn off
You found the problem.
The black wires must be grounded at G101 on the thermostat housing. The black wires merge and run as one black wire to a 14P connector on the left side of the engine bay and a 20P connector on the left shock tower. Maybe the connector is not fully seated.
The black wires must be grounded at G101 on the thermostat housing. The black wires merge and run as one black wire to a 14P connector on the left side of the engine bay and a 20P connector on the left shock tower. Maybe the connector is not fully seated.
Connectors seated
:-(