Question about 1994 Toyota Corolla
I am having a intermittent starting problem after the vehicle warms up. I want to check the open circuit relay and need to know the location, can anyone advise me to the location?
Usually in the fuse box under the hood
Posted on Jan 04, 2014
Testimonial: "It is not there.I've looked under both sides of the dash,and the fuse box under the hood. I haven't looked behind the console and radio yet. I found the computer, it sets underneath the console right in the middle but I haven't found what I need to find yet."
A 6ya expert can help you resolve that issue over the phone in a minute or two.
Best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
The service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.
Posted on Jan 02, 2017
check out this pic of a drl next to a steering component http://images.google.com/imgres?imgurl=http://img169.imageshack.us/img169/9872/img02yd9.jpg&imgrefurl=http://forum.autoequations.com/viewtopic.php%3Ff%3D13%26t%3D10&usg=__zcZ86ra1eleETXZaqQ9oPUXYxXw=&h=480&w=640&sz=140&hl=en&start=11&sig2=eOSUS9yW1ZTktragaGn2dw&um=1&tbnid=ckWF3oon0eOtXM:&tbnh=103&tbnw=137&prev=/images%3Fq%3Ddrl%2Bcorolla%26hl%3Den%26safe%3Doff%26client%3Dfirefox-a%26rls%3Dorg.mozilla:en-US:official%26hs%3DWdP%26sa%3DN%26um%3D1&ei=FxGvSuaECZ6etwesnYT1DQ
wow thats huge link lol
Posted on Sep 15, 2009
Tips for a great answer:
Jul 23, 2016 | 2002 Chrysler Town & Country
Ignition voltage is present on circuit 839.
The CKP signal at PCM is NOT detected.
DTC P1599 is a type D DTC
The PCM has the ability to set a diagnostic trouble code (DTC) if the engine stalls when the ignition has NOT been turned OFF. This DTC may aid in intermittent diagnosis of a customer complaint of intermittent engine stall. The scan tool Failure Record information can be duplicated under the same stall conditions in an attempt to reproduce the occurrence. Since DTC P1599 is a type D DTC, the PCM will not command the MIL or SERVICE telltale ON. This DTC can set due to driver error. For example, a vehicle equipped with a manual transaxle in which the clutch was released too quickly causing the engine to stall.
DTC P1640 (PCM Output Circuit)
The PCM contains an output driver module (ODM) which controls 7 circuits: A/C relay, air pump relay, EVAP purge solenoid, EVAP vent solenoid, fan control 1, fan control 2, and TCC solenoid. The ODM controls each of these circuits independently by controlling the circuit ground. The ODM monitors the voltage level at each of the 6 circuits into the PCM when the device is being commanded ON or OFF. When the device is commanded OFF, the circuit is not grounded, the voltage level at the PCM should be high (ignition voltage). When the device is commanded ON, the circuit is grounded, the voltage level at the PCM should be low. Each of the 7 drivers in the ODM contains a feedback circuit used to determine if a particular circuit failed, which can be read on the scan tool. DTC P1640 sets when any one of the 7 feedback voltages is low when that device is turned OFF or when any one of the 7 feedback voltages is high when that device is turned ON when the engine is running.
Sounds to me like you have a short on one of these circuits !
To locate an intermittent problem, use the scan tool to command each of the 7 solenoids tied to the ODM circuit ON and OFF independently while monitoring:
A/C RELAY CKT OPEN SHORT TO GND
A/C RELAY CKT SHORT TO VOLTS
AIR PUMP REL. CKT OPEN SHORT TO GND
AIR PUMP REL. CKT SHORT TO VOLTS
EVAP PURGE CKT OPEN SHORT TO GND
EVAP PURGE CKT SHORT TO VOLTS
EVAP VENT CKT OPEN SHORT TO GND
EVAP VENT CKT SHORT TO VOLTS
FC 1 RELAY CKT OPEN SHORT TO GND
FC 1 RELAY CKT SHORT TO VOLTS
FC 2 RELAY CKT OPEN SHORT TO GND
FC 2 RELAY CKT SHORT TO VOLTS
TCC DUTY CYCLE OPEN SHORT TO GND
TCC DUTY CYCLE SHORT TO VOLTS
If IGN 3 fuse is open, A/C RELAY CKT OPEN SHORT TO GND, EVAP VENT CKT OPEN SHORT TO GND, and EVAP PURGE CKT OPEN SHORT TO GND parameters on the scan tool will read YES.
Do you have a DVOM - digital volt ohm meter ? You need to check each wire in the above circuits for a short to ground or B+ !
Sep 30, 2015 | Saturn Cars & Trucks
Sep 11, 2013 | Cars & Trucks
Jun 28, 2012 | 1993 Dodge Dakota
Mar 02, 2017 | 2000 Lincoln Navigator
Copyright © 1998 Ford Motor Company
Mar 10, 2011 | 1998 Ford Explorer
Sep 04, 2009 | 1994 Ford Mustang
Apr 27, 2017 | 2006 Chevrolet Tahoe
Jul 25, 2008 | 1993 Acura Integra Hatchback
95 people viewed this question
Usually answered in minutes!