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Chevette air conditioning relay DR 622 find

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Posted on Oct 25, 2012

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SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

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Glow plug relay location isuzu elf

The wire that runs to the glo-plugs comes from the relay and as it is a heavy gauge wire (colour coded ) try tracing it back to a relay. IT may be completely separate to all the others.

Mar 18, 2014 | 1985 Chevrolet Chevette

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What are the probable causes of DTC P2444?

Hello Please read this carefully. This info directly relates to the code you are having. I will include a troubleshooting tree at the bottom. If there are any other codes or if you need further info please let me know:

SYSTEM DESCRIPTION The secondary air injection (AIR) system aids in the reduction of hydrocarbon emissions during a cold start. The system forces fresh filtered air into the exhaust stream in order to accelerate the catalyst operation. An electric air pump, the AIR pump, provides filtered air on demand to the AIR control solenoid valve/pressure sensor assembly. The AIR control solenoid valve/pressure sensor assembly controls the flow of air from the AIR pump to the exhaust manifold. The AIR valve relay supplies the current needed to operate the AIR control solenoid valve/pressure sensor assembly. A pressure sensor is used to monitor the air flow from the AIR pump. The powertrain control module (PCM) supplies the internal pressure sensor with a 5-volt reference, an electrical ground, and a signal circuit.

The AIR diagnostic uses 3 phases to test the AIR system:
  • DTCs P0411 and P2430 run during Phase 1
  • DTCs P2430 and P2440 run during Phase 2
  • DTC P2444 runs during Phase 3
In all 3 phases, testing is accomplished by comparing the measured pressure against the expected pressure. The PCM can detect faults in the AIR pump, AIR control solenoid valve/pressure sensor assembly, and the exhaust check valve. The pressure sensor can also detect leaks and restrictions in the secondary AIR system plumbing.

The DTC P2444 Secondary Air Injection (AIR) Pump is Stuck ON diagnostic monitors the system pressure signal during test phase 3. When the PCM determines the AIR pressure sensor signal is higher than expected, DTC P2444 sets.

This diagnostic supports the following DTC:
  • DTC P2444 Secondary Air Injection (AIR) System Pump Stuck On
  • DTCs P0101, P0102, P0103, P0107, P0108, P0112, P0113, P0116, P0117, P0118, P0201, P0202, P0203, P0204, P0205, P0206, P0300, P0350, P0411, P0412, P0418, P0420, P0606, P0641, P0651, P1350, P2430, P2431, P2432, P2433, P2440 are not set.
  • The system voltage is between 10-18 volts .
  • The engine is running.
  • The start-up engine coolant temperature (ECT) parameter is between 5-50°C (41-122°F) .
  • The start-up intake air temperature (IAT) parameter is between 5-60°C (41-140°F) .
  • The BARO parameter is more than 60 kPa .
  • The MAF sensor parameter is between 3-24 g/s .
  • DTC P2444 runs once per trip start-up when the above conditions are met and the AIR pump operation is requested.
The measured AIR pressure is more than expected during AIR pump Phase 3 operation. DTC P2444 sets within 5 seconds when the above conditions are met.

  • The PCM illuminates the malfunction indicator lamp (MIL) during the first key cycle in which the diagnostic trouble code (DTC) sets.
  • The PCM records the operating conditions at the time the diagnostic fails. This information is stored in the Freeze Frame buffer.
  • The PCM turns OFF the MIL on the third consecutive trip cycle during which the diagnostic has been run and the fault condition is no longer present.
  • A DTC will clear after 40 consecutive warm-up cycles have occurred without a fault.
  • A DTC can be cleared by using the scan tool Clear Information function.

Inspect for any of the following conditions:
  • The resistance of the AIR pump relay coil (across terminal 85 and terminal 86) is 50-70 ohms at 20°C (68°F) . In the normal unenergized state, the resistance of the open relay contacts (across terminal 30 and terminal 87) is infinite.
  • The AIR pump relays electrical contacts may be pitted and sticking. Replace the relay if tapping gently on the relay or wiggling the relay causes a change in the relays operation.
  • The performance of the AIR pump relay may be affected by temperature. Check the relay after sitting outside overnight and after running the engine 30 minutes .
  • An intermittent malfunction may be caused by a fault in an AIR system electrical circuit. Inspect the wiring harness and components for an intermittent condition.


The numbers below refer to the step numbers on the diagnostic table.
  1. This step tests for the correct operation of the AIR pump. When the AIR pump relay is commanded ON with the scan tool, only the AIR pump relay is energized. When the AIR valve relay is commanded ON with the scan tool, both the AIR pump and the AIR valve relays are energized.
  2. This step tests for the correct operation of the AIR pump relay.

Nov 27, 2013 | 2005 Buick LaCrosse

1 Answer

I have a 1984 chevette diesel the relays will click twice on and off all glow plugs work just wont stay on long enouf to heat can plug it up starts easy please help im a mechanic

I would be inclined to replace the relays as it appears that there is a shorting fault in the relay coil that is not allowing the points to be held together for the correct time period.

Nov 04, 2013 | 1984 Chevrolet Chevette

1 Answer

Horn wont work in 1986 chevrolet chevette scooter

If horn fuse is good, Ground horn wire at horn button,listen for click at horn relay

Jan 26, 2011 | 1985 Chevrolet Chevette

1 Answer

Hi just wonder why my 2000 cavilier would still blow hot air when the heater is shut off

The vehicle is probably engineered that way, years back GM introduced what they called Astro ventillation tyo the Chevette line of vehicles, I had just started working for a dealership that was going to be slandered all over the news because they couldn't repair the vehicle from blowing warm air even though the fan and heater slide were turned off.
This was my first job in the dealer after the problem went around the shop for a month or two, I found an article paragraph on the first page of our in house reair manual for heater and air condition trouble shooting Chevrolet Chevette, it stated that the car with the key on whether running or not would keep a constant flow of air throughout its outer body skins called an Astro Ventillation system and its purpose was to keep any toxic and/or flammable gas fumes out of the vehicles cabin space.
It was around for a long time and probablyl is the reason why you have this same condition of warm air flow, its a constant turning of the heater blower fan.
Happy Motoring!!!

Jun 07, 2010 | 2000 Chevrolet Cavalier

1 Answer

Where is the air conditioner blower fan relay on 1996 Jeep Grand Cherokee located?

The blower fan relay is located in the fuse box on the driver's side fender-well. A Jeep Cherokee uses an electric fan as an auxiliary fan for engine cooling and for cooling the air conditioning condenser when the air conditioning is in operation. A radiator temperature-sensing switch that activates the fan relay at 198 degrees F turns the fan on and controls its operation. The temperature drops when the vehicle is in motion and the switch turns the fan off. When the air conditioning system is in operation, the air conditioning relay supplies power to the fan relay via a fan diode downstream from the ignition switch. This diode activates the fan relay and keeps the fan operating as long as the air conditioning is on. Thanks. you can rate this solution and show your appreciation.

May 18, 2010 | Cars & Trucks

1 Answer

New master cylinder and still no pedal.

get a new mechanic. 66 charger is right about brake lines ,also wheel cylinders can leak air in but still hold fluid in same for calipers. also check proportioning valve. My ? is are you bleeding it out? You also need to bench bleed the master before installing it.

Apr 23, 2009 | 1983 Chevrolet Chevette

1 Answer

Need to change timing belt on a 1981 chevy chevette/ set timing

bottom gear go straight up top gear sets about 2oclock thers a small hole in the gear too line up with a hole in the head use a small drill bit too check this!!!!

Apr 16, 2009 | 1983 Chevrolet Chevette

1 Answer

Glow PLugs and Relays

Good Day
The glow plug relays are located on the right front shock tower. Remove the cover and you will see two relays If I remember I think they are round, but not sure.

Please let me know how you make out and if there is anything else that I might be able to help you with.


Sep 17, 2008 | 1985 Chevrolet Chevette

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