did a few seaches but wanted to get some better answers. we have a 1990 civic std with a ZC motor...we pulled it out of a crx si. it worked perfectly in the crx, but now we are getting a code 4 Crank Sensor error and we are in limp mode. we have double and triple checked our wiring and we are 110% sure our wiring is correct. we have also cross checked info with other websites with our instructions.

what else should i be looking for? im pretty much stumped and think the sensor is bad we are going to try replacing that tomarrow, but i would like all of your opinons before my head explodes.

thanks in advance

 

can anyone help me please....

 

maybe the wiring is right but the sensor got damaged in the swap? it's perfectly possible. are there any compatable sensors off USDM engines you could swap out to verify if it is the sensor itself or not?

 

well the 89 usdm integra sensor will fit. i saw some posts about that in my search. i guess we'll just buy that today and see what happens. would that sensor throw the car into limp mode?

 

sure. the car has no clue where TDC is, and where the crank is in relation to everything. as far as it knows, the timing could be way the hell off. so it's trying to avoid all the nasty things that can happen when you're +- 10 deg of timing :D

 

makes sense. thanks for your help i'll post back tonight and let you know what happened

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by IggDawg &raquo;</TD></TR><TR><TD CLASS="quote">maybe the wiring is right but the sensor got damaged in the swap? it's perfectly possible. are there any compatable sensors off USDM engines you could swap out to verify if it is the sensor itself or not?</TD></TR></TABLE>

code 4 is the crank angle sensor which is in the distributor - the cylinder position sensor on the exhaust camshaft is a code 9 - he either has a bad distributor or his orange and/or white wires to B10 and B12 are not connected well or shorting out

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by jlicrx &raquo;</TD></TR><TR><TD CLASS="quote">

code 4 is the crank angle sensor which is in the distributor - the cylinder position sensor on the exhaust camshaft is a code 9 - he either has a bad distributor or his orange and/or white wires to B10 and B12 are not connected well or shorting out </TD></TR></TABLE>

r u sure. i need a second opinion can anyone verify this info? i was pretty sure that the crank angle sensor was the sensor on the exhaust camshaft. we looked it up in the Honda Civic manuals and thats what it lead us to. we are getting a funny ohm reading as well. can anyone verify what ohms are supposed to come from the b10 b12? what about the CAS or CPS? need more info. please help.

 

another source

7. These two wires go to the green plug on the crank angle sensor which comes off the exhaust cam. You'll need to splice the wires, but make sure to use bullet connectors. If you don't you will lose to much power through the connection and the computer may throw a code.

i just cut and added in the wire from the CAS :green plug, exhaust cam: should i have just spliced the wire instead of cutting? does this hold any truth?

 

Its in the distributor. I had the exact same problem a year ago. both 4 and 9 were throwing exact same thing happening. just replace the dizzy and get timing right, all problems will cease to exist.

 

update:

everything is still messed up. we have checked everything and all the info we have and its still throwing a code. we are going to have a new distributor sent out this morning so i'll let you all know what is going on.

 

just changed the distributor and the cyl position sensor. still getting code 4! double checked wiring for the 100th time. test ohms and all. still getting code 4!

any other suggestions?

 

if it was a Twin Cam ZC check your cam timing, if it jumped 2-3 teeth it will give that error. The crank angle sensore (cylinder position sensor) is actually on the exhaust cam not the distributer unless you have a SOHC ZC. Also check wiring. I think it matters the polarity of the wires. THis is from memory as I built mine 2 years ago.

 

yes its a dohc zc. we have changed the cylinder postion sensor and still the same code. i'll check the timing tonight. we will once again check the wiring and maybe even rewire the cps tonight just for good measure.

just so everyone know this came out of a swapped 1989 crx si and it worked perfect in that car. no problems and now the civic std is giving up this headache.

AHHHH

well anyone else have a suggestion?

 

Code 4 - Crank Angle Sensor - Top sensor in the dist. and is used for fuel control and misfire detection.

Code 8 - Top Dead Center Sensor - It's the second sensor in the dist. It determines the injection timing for each cylinder, also used to detect engine speed (rpm) to read the basic discharge duration, for different operating conditions.

Code 9 - Cylinder Position Sensor - It's the third sensor in the dist., and it detects the position of the No. 1 Cylinder, as the base for the Sequential Injection. CYP sensor is mounted on the exhaust cam on the DOHC ZC.

 

I thought the wires coming from the CAS(greenplug) was connected to your C plug on your ecu?

 

one more time - the cylinder position sensor (CPS) is on the end of the exhaust camshaft, with blue/grn and blu/yel wires in green plug which go to pins C1 & C2 at ECU - problems with this sensor will throw CEL CODE 9 - the crank angle sensor (which is not the CPS) is in the distributor, with orange and white wires which go to pins B10 & B12 at ECU - problems with this sensor will throw CEL CODE 4 - since he has code 4 (not 9) he either has something wrong in the orange and/or white wires or he has a bad distributor - he tried different distributor, still got CEL, so I would look at the wiring - could even be a bad ECU or timing belt not correct

 

jlicrx... the crank angle sensor and the cylinder postion sensor are the same accourding to my resources and books and mechanics. from what you posted the cps goes to c1 c2 and that is exactly where my problem was. the pins that connect into the wiring harness were not making a complete connection due to the pins being pulled out and loosened. so once i took them out and tightened the connection the code 4 disappered. so that tells me the the cps and the cas are the same. the sensor on the exhaust cam is the crank angle sensor.

so problem solved! dam ecu pins were not tight and now i fixed it. thanks for all your posts and help it was appriciated.