Starts then dies!!! Help
09-22-2015
#1
Registered!!
Thread Starter
Join Date: Sep 2015
Age: 55
Posts: 5
Likes: 0
Received 0 Likes
on
0 Posts
Rep Power: 0 
Starts then dies!!! Help My daughters 04 starts only with cps unplugged. Checked voltage on blue wire and get about 5v. The voltage stays constant, plugged up to cps or unplugged to cps. The crank position sensor is new. Also the 5v doesn't change when engine is turned by hand. Please help.
09-22-2015
#2
Registered!!
Join Date: Apr 2014
Location: Hampton Roads, Virginia
Posts: 373
Likes: 0
Received 0 Likes
on
0 Posts
Rep Power: 125 
Re: Starts then dies!!! Help
Is this a Honda CPS?
Have you checked the service manual, which I have posted for your viewing pleasure?
The service manual includes some steps where you check measurements to the ECU.
Have you checked the service manual, which I have posted for your viewing pleasure?
The service manual includes some steps where you check measurements to the ECU.
09-22-2015
#3
If you think a good mechanic is expensive, try hiring a bad one
Re: Starts then dies!!! Help
My daughters 04 starts only with cps unplugged.
Start --then die in 2 seconds? Timing belt has jumped time.
EDIT: Wait a sec...What are you calling a CPS??? Cam position sensor (CMP) or Crank position sensor (CKP)??
Last edited by ezone; 09-22-2015 at 09:32 PM.
09-23-2015
#5
Registered!!
Thread Starter
Join Date: Sep 2015
Age: 55
Posts: 5
Likes: 0
Received 0 Likes
on
0 Posts
Rep Power: 0
09-23-2015
#6
If you think a good mechanic is expensive, try hiring a bad one
Re: Starts then dies!!! Help
Checked voltage on blue wire and get about 5v. The voltage stays constant, plugged up to cps or unplugged to cps. The crank position sensor is new. Also the 5v doesn't change when engine is turned by hand. Please help.
At the PCM, or are you backprobed into the backside of the CKP connector?
Did you verify the integrity of the ground on the brown/yellow wire?
Have you carefully inspected the condition of the terminals inside the CKP connector?
The connector may be prone to moisture entry and terminals are subject to corrosion damage.
Also check the terminal tension, or "grip" of the female pins in the connector.
09-24-2015
#7
Registered!!
Thread Starter
Join Date: Sep 2015
Age: 55
Posts: 5
Likes: 0
Received 0 Likes
on
0 Posts
Rep Power: 0 Re: Starts then dies!!! Help
voltage taken on blue wire while plugged up AND while unplugged 1 inch from connector.
good ground and 12v. on other wires. I get constant 5v. like its getting 5v from another sensor. Does the constant 5v tell pcm to shut down? if so where is this 5v coming from?
good ground and 12v. on other wires. I get constant 5v. like its getting 5v from another sensor. Does the constant 5v tell pcm to shut down? if so where is this 5v coming from?
09-24-2015
#8
Registered!!
Thread Starter
Join Date: Sep 2015
Age: 55
Posts: 5
Likes: 0
Received 0 Likes
on
0 Posts
Rep Power: 0 Re: Starts then dies!!! Help
good ground and 12v. on other wires. I get constant 5v. like its getting 5v from another sensor. Does the constant 5v tell pcm to shut down? if so where is this 5v coming from?
09-24-2015
#9
If you think a good mechanic is expensive, try hiring a bad one
Re: Starts then dies!!! Help
You should see a 12v, a ground, and a 5v. (not sure about the order, I did not check a diagram)
The 5v comes from the PCM (bias voltage) on the CKP input line, the sensor should pull it to ground as the "trigger bumps" move past the sensor.
Is the crank pulley installed backwards somehow (IDK if that's even possible)?
Do the triggers line up with the sensor correctly?
Is the sensor alignment peg broken off, sensor misaligned or not close enough to the gear teeth?
The 5v comes from the PCM (bias voltage) on the CKP input line, the sensor should pull it to ground as the "trigger bumps" move past the sensor.
Is the crank pulley installed backwards somehow (IDK if that's even possible)?
Do the triggers line up with the sensor correctly?
Is the sensor alignment peg broken off, sensor misaligned or not close enough to the gear teeth?
Thread
Thread Starter
Honda Civic Forum
Replies
Last Post
Wild Cranker
Mechanical Problems/Vehicle Issues and Fix-it Forum
427
01-28-2016 06:49 PM
mrcell24
6th Generation Civic 1996 - 2000
4
05-19-2015 10:02 AM
Ashley Farr
Mechanical Problems/Vehicle Issues and Fix-it Forum
1
05-07-2015 05:01 PM
twtron
Electrical, Wiring, and In Car Entertainment
6
04-17-2015 12:09 AM
black2k1vtec
General Automotive Discussion
8
12-06-2001 09:49 PM
