QuestionQUESTION: Hi Roland,
I have a 1999 Chrysler Intrepid -2.7L; I just got done rebuilding and installing this engine, less hooking up the radiator. After connection all the electrical and fuel I tried to start it. The engine turns over fine, got oil pressure but no spark or fuel.
I repeatedly get the following codes from the odometer, even after several resets, so I am not making any headway yet.
P1684 – Battery disconnected
P0123 – TPS voltage high
- violet wire has 4.98V
- no short to ground on the other two leads
- Resistance varies smoothly between center and outboard terminals of the TPS
P0118 – ECT sensor voltage high
- violet wire has 4.98V
- no short to ground on the other lead
P0113 – Intake air temp sensor voltage high
- no violet lead
P0406 – EGR position sensor Volts too high
- violet wire has 4.98V
No power to the spark plug coils.
This is as much as I know thus far; thought I would consult with you prior to tearing things apart or blindly replacing parts.
What do I check next?
Thank you for your time
Best regards,
Greg
ANSWER: Hi Greg,
The 4.98 supply voltage for the three sensors that need a nominal 5v looks reasonable. All of the codes also include the possibility for a faulty sensor, but that seems highly unlikely that they all failed. The one remaining possibility, which is also listed for all 4 codes in that the sensor ground circuit is 'open'. The sensor ground wire (against which the signal is meansured) is black/light blue and is supposed to be connected to pin 43 of one of the two 40-way pcm plugs. The possibility is either that the wire is open or a splice that it passes thru is open, or I suppose that the ground point on pin 43 is not truly at ground voltage, which then makes the signzl voltage appear high. I notice you said "no short to ground on the other lead(s)" which depending upon whether the ground you used for the test was the same ground as referred to at pin 43. In any case the only common mode I can see involved for all four sensors is that. So see if you get continuity between the black/light blue of each sensor and pin 43 or not. And see what voltage relative to chassis ground you find on pin 43 if any.
No spark or fuel means the automatic shut down relay is not being energized by the pcm. It only does that if fuse N is good, and if there are signals from the cam and crank sensors getting to the pcm so that it will actuate the coil of the ASD. If you weren't getting those signals you would also be getting an 0320 and or an 0340 code, so check fuse N as the more likely cause of no spark or fuel.
Please let me know what you find.
Roland
PS: Please 'rate' may answer and considera nomination of me for 'expert of the month'. Thanks
---------- FOLLOW-UP ----------
QUESTION: Roland,
Not a question.
Just a quick not to let you know the problem was the ground at the connector.
Got that fixed and replaced fuse N and it started with no problems or codes.
Fuse N was not blown per se; it appeared to be corroded or crystallized, either way it was not being a conductor.
I saw this same fuse phenomenon about 30+ years ago with the alternator field fuse in my '66 Dodge pickup.
The fuse looked good but would not conduct.
While breaking the glass fuse tube; to investigate further, a piece of glass hit the fuse wire and it disintegrated - weird stuff.
Anyway; back to the Intrepid-
It is back on the road and runs great.
Roland, my sincerest thanks to you for sharing your knowledge and giving of your time.
Happy Holidays,
Greg
AnswerThe race for "expert of the month" is going down to the wire.
Chrysler "repairer" vs Microsoft "coder".
One vote per answer is permitted.
Deadline to vote is Thursday, 4 PM CT.
Click on "Thank/rate" button below, then click on "Yes" for nomination.
Thanks
Hi Greg,
Thanks for the success story. I appreciate learning about every fix. I hope you have fine holidays as well. And thanks for the kind words of appreciation earlier. They encourage me to continue.
Roland
