Question about 2003 Hyundai Accent
The fan relay gets a ground signal from the ecu when the temp sensor indicates additional cooling is needed.
Posted on Nov 04, 2017
SOURCE: blower fan
Sounds like the problem is more with the blower motor assembly itself. The blower motor have micro-proccers built itnto them which comunicate with the control heads and do the actual regulating of the fan motor. Dealers have computers with diagnostic software which allows them to monitor what is happening in the eletronic controls of the vehicle. Electronic diagnostics without the diagnostic software makes it very diffecult to pinpoint the actual item causing the problem.
Posted on Jan 25, 2009
P0342 is set when the ECM does NOT receive a signal from the CMP snsr. You may very well have GOOD continuity between the ECM and pin 2 (000.2 ohms), but that wire, if grounded someplace (shorted to ground or to another wire in the harness), the ECM will not/does not get a clear/proper signal. Look for a problem in the wiring harness.
Posted on Sep 07, 2009
yes and also may make it run rough or lack power. the o2 sensors tell the computer how to make the engine run
Posted on Feb 13, 2010
Testimonial: "u said it would make it hard to start and the other tech said he doesnt think so"
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A/C refrigerant pressure exceeds 1 310 kPa (190 psi).
After the vehicle is shut off if the engine coolant temperature at key-off is greater than 140?°C (284?°F) and system voltage is more than 12 volts. The fans will stay on for approximately 3 minutes.
The BCM and PCM/ECM command High Speed Fans on under the following conditions:
Engine coolant temperature reaches 110?°C (230?°F).
A/C refrigerant pressure exceeds 1 655 kPa (240 psi).
When certain DTCs set.
The three relays are located in the under hood fuse / relay box ! You need to have it checked for DTC'S -diagnostic trouble codes ! An you need a GM Tech 2 scan tool !
This diagnostic procedure supports the following DTCs:
DTC P0480 Cooling Fan 1 Relay Control Circuit
DTC P0481 Cooling Fan 2 and 3 or S/P Relay Control Circuit
DTC P0691 Cooling Fan 1 Relay Control Circuit Low Voltage
DTC P0692 Cooling Fan 1 Relay Control Circuit High Voltage
DTC P0693 Cooling Fan 2 and 3 or S/P Relay Control Circuit Low Voltage
DTC P0694 Cooling Fan 2 and 3 or S/P Relay Control Circuit High Voltage
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