Wierd H22 swap issue......reoccuring code 9
04-22-2006, 05:58 PM
#1
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Wierd H22 swap issue......reoccuring code 9
Just finished up a JDM H22 swap in my 2000 Civic Sedan. The engine is an OBD1 H22, running a JDM P13 ECU.
After starting the engine up, a MIL had shown. After checking the codes, it was found to be a code 9, CYP sensor. Originally, I had tried just replacing the distributor which had prompted the exact same code. Doubting that two distributors both had bad CYP sensors, I had tried a third, and the MIL occured again showing a code 9.
Using the trouble shooting guide through Mitchell On Demand, I performed the diagnostics checking as indicated. Measured my resistance at the distributor, had found approximately 480 ohms (within the allowable 350-700 ohm range). Then I had check for continuity to ground on the sensors and had found no continuity. I then reconnected the distributor sensor plug, and went and checked my resistance for my orange and white at the ECU, seeing a 481 ohms. Which is still within spec. Checked both wires for continuity to ground, and nothing. The mitchell had suggested swapping the computer. I had burrowed ANOTHER P13 from a friend that worked fine in his car and did not shoot a MIL. Well, sure enough, plugged it into the car, and the moment the car revs about approx. 2500-3000rpm, the MIL comes on and its a code 9.
My P13 ecu in my friends car (which as well is an OBD1 H22) does not shoot any codes at all.
ANY ideas at all what is going on here? Is there something that I am missing? Its weird, all the parts work fine in other cars, don't shoot engine lights, and other distributors, or ecu's from working cars in mine shoot a MIL. Tomorrow, I am going to try jumping over the sensor direct from the distributor to the ecu, and if that gets rid of it, I'm digging back into the harness. If ANYONE has ANY idea as to what is going on here, please, throw some suggestions at me.
After starting the engine up, a MIL had shown. After checking the codes, it was found to be a code 9, CYP sensor. Originally, I had tried just replacing the distributor which had prompted the exact same code. Doubting that two distributors both had bad CYP sensors, I had tried a third, and the MIL occured again showing a code 9.
Using the trouble shooting guide through Mitchell On Demand, I performed the diagnostics checking as indicated. Measured my resistance at the distributor, had found approximately 480 ohms (within the allowable 350-700 ohm range). Then I had check for continuity to ground on the sensors and had found no continuity. I then reconnected the distributor sensor plug, and went and checked my resistance for my orange and white at the ECU, seeing a 481 ohms. Which is still within spec. Checked both wires for continuity to ground, and nothing. The mitchell had suggested swapping the computer. I had burrowed ANOTHER P13 from a friend that worked fine in his car and did not shoot a MIL. Well, sure enough, plugged it into the car, and the moment the car revs about approx. 2500-3000rpm, the MIL comes on and its a code 9.
My P13 ecu in my friends car (which as well is an OBD1 H22) does not shoot any codes at all.
ANY ideas at all what is going on here? Is there something that I am missing? Its weird, all the parts work fine in other cars, don't shoot engine lights, and other distributors, or ecu's from working cars in mine shoot a MIL. Tomorrow, I am going to try jumping over the sensor direct from the distributor to the ecu, and if that gets rid of it, I'm digging back into the harness. If ANYONE has ANY idea as to what is going on here, please, throw some suggestions at me.
04-24-2006, 11:11 AM
#5
Honda-Tech Member
When you are checking for resistance at the ecu. Are you checking it on the pins of your '00 harness, or on the jumper harness?
The reason I ask is becuase I have run into a few problems with bad connections in the jumper, or sometimes missing wires altogether.
The reason I ask is becuase I have run into a few problems with bad connections in the jumper, or sometimes missing wires altogether.
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