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Tim's Auto Repair
Tim's Auto Repair, Mechanic
Category: Car
Satisfied Customers: 12801
Experience:  Have owned a repair shop for 25 yrs.
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chry town and country: automotive

Customer Question

automotive
Submitted: 1 year ago.
Category: Car
Expert:  Tim's Auto Repair replied 1 year ago.

tims auto repair :

hi

Customer:

hello

tims auto repair :

does it run bad coldand hot?

tims auto repair :

are you there?

Customer:

yes as long as the battery light is on if you cycle key a few times and battery light stays off runs fine no trouble shooting in my computer for this

tims auto repair :

ok

tims auto repair :

the 1478 code worries me

tims auto repair :

i think you may have a bad pcm[computer]

tims auto repair :

i will geive you some tests for these codes

tims auto repair :

you may have a bad ect,,but,,i also think your computer may be the big problem

Customer:

coustomer had taken of alt had in checked said ok woundering if something in ecm not booting up right but didnt want to just throw parts at it

tims auto repair :

the regulator is built into the pcm

tims auto repair :














04_cr03carav_pd-175.png
Full Size Image

Test 1





SYMPTOM
P1478 - BATTERY TEMP SENSOR VOLTS OUT OF LIMIT

WHEN MONITORED
Ignition on.

SET CONDITION
The Battery Temperature Sensor, internal to the PCM, goes above 4.9 volts or below 0.1 volt for more than 3.2 seconds.

POSSIBLE CAUSES
- PCM

Customer:

i know voltage stays constant at 13.9 load or no load and dont spike at all.

tims auto repair :














84_cr03carav_pd-048.png
Full Size Image

Test 1 - 2










85_cr03carav_pd-049.png
Full Size Image

Test 3 - 6





SYMPTOM
P0118 - ECT SENSOR VOLTAGE TOO HIGH

WHEN MONITORED
With the ignition on. Battery voltage greater than 10.4 volts.

SET CONDITION
The Engine Coolant Temperature (ECT) sensor circuit voltage at the PCM is greater than 4.96 volts for more than 2.6 seconds.

POSSIBLE CAUSES
- ECT sensor voltage above 4.6 Volts
- (K2) ECT sensor signal circuit shorted to battery voltage
- ECT sensor internal failure
- (K2) ECT sensor signal circuit open
- -(K900) sensor ground circuit open
- PCM

tims auto repair :

it should be around 14.3 with no load and running

tims auto repair :

Please RATE my answer by clicking the RATINGS button, so I can get credit for my work,,the [BAD SERVICE] and [POOR SERVICE] rating does not give me credit].i don't receive commission if you give a less than 3 star/smiley rating ..I'm not always going to be giving you good news,so please don't let this stand in the way of you accepting my answer.it does not cost you more money.we will still be able to communicate,,.please understand,i can not see,hear or touch the vehicle and only know what you tell me. Bonuses and positive feedback are appreciated!if you are not satisfied with my answer,please do not leave bad feed back,i will gladly opt out and let another expert handle the question.if i have sent any diagrams,please print them.they will only stay on here for an hour or so...sometimes you may need to right click the image,then save picture as]to save it to your computer so you can open it with your picture program...PLEASE ASK IF YOU NEED MORE HELP

Tim's Auto Repair, Mechanic
Category: Car
Satisfied Customers: 12801
Experience: Have owned a repair shop for 25 yrs.
Tim's Auto Repair and 14 other Car Specialists are ready to help you

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