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Posted on Jan 02, 2017
if both heater hoses going into the fire wall are hot,remove the heater control assembly from dash and make sure cable is connected and do the same under the hood where one heater hose has a valve connected to it,
Posted on Dec 15, 2009
These trucks have problems with the blower motors,these stock motors are known to fail intermittently when one or more motor windings fail. This is evidenced by the motor not running occasionally after the car/truck is turned on. At highway speeds, with the airflow coming into the air system from the road, the motor may suddenly start working again. Any time the motor stops on the dead spot, the motor won't be able to start spinning. The airflow can "blow" the blower, turning it to a good part of the motor and the motor will continue to run until the motor stops on the bad spot or the armeture again.
The blower is mounted under the dashboard on the passenger side. The housing unbolts with four screws and the motor unplugs from the wiring harness on the left side of the motor housing. The blower is a large white plastic cylinder known as a centrifuge blower.
Posted on Nov 02, 2010
SOURCE: AC & Air Circulation Button LED's Flashing. Done the calibration test and resulted with only Rear Wiper LED flashing. I tried to exit pressing the Rear window deffoger button, rear wiper button or
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1998 Dodge Caravan Computer Reset Process Computer Problem 1998
Posted on Jul 13, 2014
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Nov 03, 2017 | AC Cars & Trucks
Mar 16, 2015 | 2004 Cadillac DeVille DHS
Feb 24, 2015 | Cars & Trucks
Mar 29, 2014 | 2001 Nissan Sentra
Jan 19, 2013 | 2009 Chrysler Town and Country
READING CODES Modes will not switch while the engine is running. The ECM automatically switches to MODE I when the ignition is switchedOFF.
1984-90 Vehicles With Dual LED System
The self-diagnostic system has 5 modes. To switch modes, switch the ignition ON and use a screwdriver to turn the mode select switch through the access port on the ECM. The inspection lights will begin to flash. When the desired mode has been entered, turn the screwdriver fully counterclockwise. The red LED and green LED perform different functions in different modes.
This is the normal vehicle operating mode. The green LED will indicate loop status. If the green LED is not blinking when the engine is running, the vehicle is in open loop, or the HO 2 S, O 2 S, or sensor circuit has a malfunction. If the green LED is blinking, the vehicle is in closed loop. If a malfunction takes place, the red LED and the MIL will glow, indicating a malfunction has occurred.
Both the red LED and green LED are used to monitor mixture ratio feedback control. The green LED will function as described in MODE I. If vehicle is in open loop, the red LED and green LED will remain on or off. In order for results to be valid, vehicle must be in closed loop. In closed loop, the red LED remains off if the system is running rich, comes on if the system is running lean, and blinks at the same time with the green LED if system is within 5% of the exact air/fuel ratio.
-When this mode is accessed, the codes stored in the ECM's memory will be flashed by the green LED and red LED on the side of the ECM. The red LED will light first. This is the first digit of the trouble code; the green LED will flash next, showing the second digit of the code. For example: 2 flashes of the red LED followed by 1 flash of the green LED corresponds to Code 21.
This mode is used for checking the throttle plate (TP) switch, starter, and vehicle speed switch status. When the TP switch or starter switch is activated, the red LED will briefly flash as the status changes. For VSS status, the green LED will remain off when vehicle speed is less than 12 mph (19 km/h) and come on when vehicle speed is greater than 12 mph (19 km/h).
This mode represents a real-time diagnostic test of the crank angle sensor, ignition signal and the mass airflow signal. The malfunction code will be displayed only when the malfunction occurs and will not be stored in memory. The output code will appear as a single or short string of pulses. Count the number of pulses for the malfunction code.
1 pulse-CMP sensor signal lost or noise in signal 2 pulses-MAF Sensor signal abnormal 3 pulses-Fuel pump circuit shorted or open 4 pulses-Ignition signal lost
Apr 19, 2011 | 1987 Nissan Pulsar
Dec 31, 2017 | Chevrolet Tahoe Cars & Trucks
Jun 07, 2009 | 1999 Ford Taurus
Oct 22, 2008 | 2004 Dodge Caravan
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