I could be wrong, but I think your intake sensor could be going bad, or some how the air temp in your intake has reached a dangerous high level.

 

I could be wrong, but I think your intake sensor could be going bad, or some how the air temp in your intake has reached a dangerous high level.

It might be bad. I don't think it was because the sensor got too hot, it's been almost 5 hours and it is still on.

 

1. DTC IS ACTIVE <A name=CHR3aa6aec89d56100489ac9cc4366981f5>1.Start the engine and allow it to reach normal operating temperature.
WARNING: When the engine is operating, do not stand in direct line with the fan. Do not put your hands near the pulleys, belts, or fan. Do not wear loose clothing. Failure to follow these instructions can result in personal injury or death.


NOTE: Diagnose and repair any system voltage DTCs before continuing with this test. 2.With the scan tool, select View DTCs.

Is the status Active for this DTC?
Yes

• Go to 2

No

• Refer to the *CHECKING FOR AN INTERMITTENT DTC Diagnostic Procedure.(Refer to 28 - DTC-Based Diagnostics/MODULE, Powertrain Control (PCM) - Standard Procedure)

2. (K21) IAT SIGNAL CIRCUIT SHORTED TO VOLTAGE
<A name=CHRo7f7221b473d4fd2bf64491acee78a1e>

1.Turn the ignition off.2.Disconnect the Intake Air Temperature Sensor connector.3.Disconnect the Powertrain Control Module (PCM) connector.4.Turn the ignition on.5.Measure the voltage of the (K21) IAT Signal circuit in the Intake Air Temperature Sensor harness connector.

Is there any voltage present?
Yes

• Repair the (K21) IAT Signal circuit for a short to voltage.
• Perform the PCM Verification Test.(Refer to 28 - DTC-Based Diagnostics/MODULE, Powertrain Control (PCM) - Standard Procedure)

No

• Go to 3

3. (K21) IAT SIGNAL OPEN OR HIGH RESISTANCE
<A name=CHRb92beab75475431188ddb712b418945e>

1.Turn the ignition off.
CAUTION: Do not probe the PCM harness connectors. Probing the PCM harness connectors will damage the PCM terminals, resulting in poor terminal to pin connection. Install Miller Special Tool #8815 to perform diagnosis.
2.Measure the resistance of the (K21) IAT Signal circuit between the Intake Air Temperature Sensor harness connector and the appropriate terminal of special tool #8815.

Is the resistance below 5.0 ohms?
Yes

• Go to 4

No

• Repair the (K21) IAT Signal circuit for an open circuit or high resistance.
• Perform the PCM Verification Test.(Refer to 28 - DTC-Based Diagnostics/MODULE, Powertrain Control (PCM) - Standard Procedure)

4. (K900) SENSOR GROUND CIRCUIT OPEN OR HIGH RESISTANCE
<A name=CHRp5fadf8f446e48f097b7596d741a0dd3>

CAUTION: Do not probe the PCM harness connectors. Probing the PCM harness connectors will damage the PCM terminals, resulting in poor terminal to pin connection. Install Miller Special Tool #8815 to perform diagnosis.
1.Measure the resistance of the (K900) Sensor Ground circuit between the Intake Air Temperature Sensor harness connector and the appropriate terminal of special tool #8815.

Is the resistance below 5.0 ohms?
Yes

• Go to 5

No

• Repair the (K900) Sensor Ground circuit for an open circuit or high resistance.
• Perform the PCM Verification Test.(Refer to 28 - DTC-Based Diagnostics/MODULE, Powertrain Control (PCM) - Standard Procedure)

5. INTAKE AIR TEMPERATURE SENSOR
<A name=CHRh1ed04a82a68482f9ce9da8f4956758e>

1.Turn the ignition off.2.Connect the Powertrain Control Module (PCM) connector.3.Connect a jumper wire between the (K21) IAT Signal circuit and the (K900) Sensor Ground in the Intake Air Temperature Sensor harness connector.4.Turn the ignition on.5.With the scan tool, read the Intake Air Temperature Sensor signal voltage.

NOTE: The sensor voltage should be approximately 0.0 volts (plus or minus .1 volt) with the jumper wire in place.

Does the scan tool display the voltage as described above?
Yes

• Replace the Intake Air Temperature Sensor in accordance with the Service Information.
• Perform the PCM Verification Test.(Refer to 28 - DTC-Based Diagnostics/MODULE, Powertrain Control (PCM) - Standard Procedure)

No

• Go to 6

6. POWERTRAIN CONTROL MODULE (PCM) <A name=CHR3aa6aec89d56100489f29cc4366981f5>1.Using the wiring diagram/schematic as a guide, inspect the wiring and connectors between the Intake Air Temperature Sensor and the Powertrain Control Module (PCM).2.Look for any chafed, pierced, pinched, or partially broken wires.3.Look for broken, bent, pushed out or corroded terminals.4.Monitor the scan tool data relative to this circuit and wiggle test the wiring and connectors.5.Look for the data to change or for the DTC to reset during the wiggle test.6.Refer to any Technical Service Bulletins that may apply.

Were any problems found?
Yes

• Repair as necessary.
• Perform the PCM Verification Test.(Refer to 28 - DTC-Based Diagnostics/MODULE, Powertrain Control (PCM) - Standard Procedure)

No

• Replace and program the Powertrain Control Module (PCM) in accordance with the Service Information.
• Perform the PCM Verification Test.(Refer to 28 - DTC-Based Diagnostics/MODULE, Powertrain Control (PCM) - Standard Procedure)
• Do not worry about the special tool just be careful not to spread the pins in the commectors. Use straight pins for probes. I suspect the sensor is bad from what I read here. Use a DVOM to measure the voltage and resistance values.

 

A troubleshooting manual, very nice Hawk.

 

One of the perks of working at a dealership:TU:

 

Dude, you should do a thread with nothing but the pages out of your manual, that would be helpful for a lot of us.

 

It would take a while but I could probably do one with the most common codes we see at the shop. If people come up with different ones they could be added. There are too numerous codes to do them all.

 

It would take a while but I could probably do one with the most common codes we see at the shop. If people come up with different ones they could be added. There are too numerous codes to do them all.

That will work Hawk. We can sticky it in the Knowledge base. Let me know if you need any help.

 

Thanks Camo. I will get to work on it. Like I said it will take a bit but its worth it if it helps folks here. Thanks for the support my friend:TU::beerchug:

 

Thanks Camo. I will get to work on it. Like I said it will take a bit but its worth it if it helps folks here. Thanks for the support my friend:TU::beerchug:

That is what we are hear to do my freind, help each other out.

 

Holy crap!!!! Now I just need the meter, i think my bro has one.

 

Multimeters are pretty cheap bro. You can get a decent one from an Autostore, or Walmart for around 10-15 bucks.

 

Ya I had one but someone stole it!

 

My moneys on the intake air temp sensor

 

Ya I had one but someone stole it!

haha, Im the Calibrations coordinator for my company, we have over 100 Multimeters of various Models, lol

 

That should be cover in the warranty...right? I already put the stock intake and tune back in just in case.

 

haha, Im the Calibrations coordinator for my company, we have over 100 Multimeters of various Models, lol

damn you........

 

damn you........

Dude, you would hate to be in the position I am in. I am responsible for 700 Calibrated items ranging from Little Multimeters to giant test sets for chinook rotor heads. On top of that I am responsible for Torque Wrenches ranging from 8 inoz to 12,000ftlbs. Our Torque wrenches have to go in for cal every 180 days.

 

Dude, you would hate to be in the position I am in. I am responsible for 700 Calibrated items ranging from Little Multimeters to giant test sets for chinook rotor heads. On top of that I am responsible for Torque Wrenches ranging from 8 inoz to 12,000ftlbs. Our Torque wrenches have to go in for cal every 180 days.

damn dude....that's alot of work. Must keep ya busy.

 

damn dude....that's alot of work. Must keep ya busy.

Thats an additional duty bro. I have my main job as a Techincal Inspector for Armament, Electical, and Avionics gear on the Apache, and I also am responsible for the Oil Samples that have to get tracked and turned in. Im pretty damn busy most of the time.

 

Yes it should be covered by your warranty and should be repaired/replaced at no charge to you.

 

Thats an additional duty bro. I have my main job as a Techincal Inspector for Armament, Electical, and Avionics gear on the Apache, and I also am responsible for the Oil Samples that have to get tracked and turned in. Im pretty damn busy most of the time.

That's pretty awesome. I have seen how the Apache's were made on tv. That is one serious piece of machinery. All the work and test put into those before they leave the plant is unbelievable.

 

Yes it should be covered by your warranty and should be repaired/replaced at no charge to you.

I will take it to the dealership Friday. Thanks for the help.

 

That's pretty awesome. I have seen how the Apache's were made on tv. That is one serious piece of machinery. All the work and test put into those before they leave the plant is unbelievable.

Its a beast, and beauty when she works. But man she is such a whore when she breaks.

 

This is a great thread. That is awesome to read the service manual. Step by step instructions are easy to follow. :rep: You rock, bro!