DTC Code found installing hpp3

[GLOCKM22]

I just installed hpp3 on my 2004 Z71 5.3L. It showed a code of B0229 that had to be erased before the installation. Can someone tell me what dtc this is? I reprogrammed the truck trying several different settings. Everytime I plugged in the programmer I had to erase the same code so it is obviously not remaining erased. There are no service lights or anything coming on. thanks

[GM-Tech]

DTC B0229, B0414, B0424, or B3770

 

The following DTCs are for the HVAC door actuators:

 

B0229 is for the recirculation actuator.

B0414 is for the left air temperature actuator.

B0424 is for the right air temperature actuator.

B3770 is for the mode actuator.

 

The HVAC control module controls the HVAC door actuators to regulate the airflow through the HVAC system. Each actuator consists of a stepper motor, a logic circuit, and a potentiometer. The potentiometer inside the door actuator allows the module to monitor the current position of the actuator drive shaft. The module supplies a 5-volt source voltage to the potentiometer on the 5-volt reference circuit. The module supplies ground to the potentiometer through the low reference circuit. The HVAC control module monitors the voltage drop across the potentiometer on the door position signal circuit. When the actuator shaft rotates, the voltage on the door position signal circuit changes. The module converts the voltage value to a count value where 1-volt is approximately equal to 51 counts.

 

The HVAC control module calibrates the travel range of the HVAC door actuators when it is initially powered by the battery positive voltage circuit. During calibration, the module commands the actuators in each direction until door travel is stopped. The module stores the minimum door positions and the maximum door positions of each actuator into memory. The total travel range is calculated by subtracting the minimum door position from the maximum door position. The door actuators can be calibrated again with a scan tool.

 

Conditions for Running the DTC

Battery voltage is 8.7-16.5 volts.

The ignition is ON.

Conditions for Setting the DTC

The DTC sets when one of the following conditions are present:

 

The actual door position value for the actuator is less than 5 counts.

The actual door position value for the actuator is greater than 250 counts.

The actuator fails calibration because the calculated travel range value is too great or too small.

 

Action Taken When the DTC Sets

 

If the DTC sets because the actual door position value is out of range, the HVAC control module will command the actuator to a default position.

If the DTC sets because the actuator failed a calibration, the HVAC control module will attempt to calibrate the motor in the next transition from OFF to RUN mode.

 

Conditions for Clearing the DTC

 

The DTC will become history if the HVAC control module no longer detects the condition that set the DTC.

 

The history DTC will clear after 100 fault free ignition cycles.

 

The DTC can be cleared with a scan tool.

 

Diagnostic Aids

 

If the condition is not present refer to Testing for Intermittent and Poor Connections in Wiring Systems.

 

If the DTC sets following a calibration of the door actuator, inspect the door and the actuator for the following conditions:

 

A misaligned actuator

Broken linkages or binding linkages

A broken door or a binding door

An obstruction that prevents the door from operating within the full range of motion

Missing seals to the door

Poor connections at the harness connector of the door actuator

 

If a signal circuit of an actuator is short to ground and the resistance across the internal potentiometer is low, then this condition could cause a multiple DTC concern.

[GLOCKM22]

GM-Tech- Thanks, that is impressive. However, I just realized that I didn't realize I knew as much about vehicles as I thought after reading that. Can you tell me what could possibly be wrong in simple terms?? I don't know if you are talkng about air conditioning or universal joints with that jargon. Over my head!! thanks again.

[budhayes3]

It actually sounds like you have a BCM (Body Control Module) code for one of the actuators or blend doors in the HVAC (Heating Ventilation and Air Conditoning)system. Are you experiencing any problems with your heat or AC? There might be an actuator or blend door motor shorting intermittently. Those are the little motors that work the doors behind the dash when you switch from floor heat, to defrost, to face, fresh to recirc, hot to cold, etc. Not a driveline problem.

[GM-Tech]

GM-Tech- Thanks, that is impressive. However, I just realized that I didn't realize I knew as much about vehicles as I thought after reading that. Can you tell me what could possibly be wrong in simple terms?? I don't know if you are talkng about air conditioning or universal joints with that jargon. Over my head!!  thanks again.

 

There's a little motor that operates the fresh air/recirc door. In it is a sensor that tells the A/C control head what position the door is in. If the numbers are not within the expected or allowed range, that DTC would set.

 

You could have a bad actuator, a binding door, a wiring issue or even a faulty control head.

 

On some vehicles, though I don't believe this affects trucks, just LOOKING at the actuator data with a scanner can set a code. Olds Intrigues were good for this. If you can switch between recirculate and outside air without problems, I wouldn't lose sleep over it.

[GLOCKM22]

Actually guys, now that I think about it. When the heater is on in the floor mode. air also comes out of the top where the defroster is supposed to. Never thought much about it until now. I guess that would be the sticking door that is throwing the code. thanks

[GM-Tech]

Actually guys, now that I think about it. When the heater is on in the floor mode. air also comes out of the top where the defroster is supposed to. Never thought much about it until now. I guess that would be the sticking door that is throwing the code. thanks

 

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The recirc/fresh air door has nothing to do with that. All that door controls is whether the source of air pulled in is originating from the outside or inside of your truck. When you switch from recirc to outside air with the blower on high, you should hear a noticeable change in the noise level. Loud in recirc, quiet in fresh air. In recirc mode, you are sucking air right out of the cab and it's much louder than drawing air from the cowl, outside.

 

But how much air comes out the defrost ducts when you have the heat on the floor? I *think* that when you have heat on, a tiny amount comes out the defrost to keep the windshield clear.

[GLOCKM22]

I would say 2/3 floor and 1/3 at the glass.

[GM-Tech]

I would say 2/3 floor and 1/3 at the glass.

 

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If no one else comes along with how theirs is, I'll try to check one on Monday for a comparison.

[jonm126214]

On the subject of actuator doors, my AC started making a moaning or whining noise periodically (about every 3-5 seconds). If I keep the air on the normal vents the noise does not happen but when I change to defrost or floor, the noise begins. I was thinking it had to do with one of the actuator doors.

 

Does this sound correct and how do I get in there and fix it?