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The HVAC control module controls the distribution of air by the use of a defrost actuator and a mode actuator. The modes that may be selected are:
The mode and defrost actuators are connected to the mode and defrost doors by a cam type linkage system. Depending on the position of the door, air is directed through the HVAC module and distributed through various ducts leading to the outlets in the dash. If the HVAC control module detects a fault with the mode or defrost doors the HVAC control module will try to drive the actuator for a predetermined amount of time, to defrost, which is the defaulted position for the mode and defrost door actuators. When the mode switch is placed in the defrost or defog positions the A/C is commanded on and the recirculation door is moved to the outside air position to help reduce window fogging. A/C is available in all modes and recirculation is only available in the panel and bi-level modes.
The following DTCs are for the HVAC door actuators:
B0248 is for the defrost actuator.
B0263 is for the mode actuator.
B0408 is for the left air temperature actuator.
B0418 is for the right air temperature 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 logic circuit inside the actuators receives control signals from the HVAC control module and controls the internal stepper motor. When a door positional change is required, the HVAC control module calculates a commanded door position. The module compares the commanded door position to the actual door position and determines the needed direction of motor rotation. The module applies a signal voltage to the door control circuit that is an input to the internal logic circuit of the door actuator. A 5 volt signal increases the door position. A 0 volt signal decreases the door position. When the commanded door position is equal to the actual door position, the HVAC control module sends a 2.5 volt signal to the door actuator and motor rotation stops. The ignition 3 voltage circuit provides source voltage to the logic circuit. The module provides ground to the actuator logic circuit through the low reference circuit.
I would start by having the HVAC control module checked for DTC'S -diagnostic trouble codes First . Then check the system by using scan tool data .
Did you perform the HVAC Diagnostic System Check?
Go to Step 2
Go to Diagnostic System Check - HVAC Systems - Manual 2
One Line Description:
INSERTER SUPPLY 3 stalled when it was moving down
If the ELEVATOR STEPPER MOTOR uses more than 130% of the maximum number of steps to move the PLATFORM of INSERTER SUPPLY 3 down to the expected position, the INSERTER SUPPLY CONTROL BOARD determines that the PLATFORM has stalled. An I1X09 error code is recorded in the error table and you must either use another INSERTER SUPPLY or press OK on the OCI to clear it.
The input to LOGIC and CONTROL from the DOWN LIMIT SWITCH is not correct.
The input to LOGIC and CONTROL from the PAPER FED SENSOR is not correct.
Mechanical binds in the ELEVATOR DRIVE SYSTEM
The input to LOGIC and CONTROL is not correct.
The FLAT CABLE is damaged.
Circuit for the ELEVATOR STEPPER MOTOR is not operating.
The rev counter of course is electronic, most likely the tiny DC motor (called a stepper motor) that moves the counter is defective or the circuit for it is, you need to remove the instrument cluster from the dash and send it out for repair at a approved repair center. Many of these sites can be found by just a google search.
The "waste ink absorber" in these models is just a length of cotton inside the printer that absorbs the waste ink. Usually they are rinsed and dried and replaced, and the printer is reset. I do not know of anywhere to get new ones
2 times Carriage error  An error occurred in the carriage encoder signal. - Carriage unit (QM2-3753) - Timing **** film (QC1-9542) - Logic board (QM2-3827) - Carriage motor (QM2-3872) 3 times Line feed error  An error occurred in the LF encoder signal. - Timing sensor unit (QM2-3878) - Timing **** disk film (QC1-9597) - Feed roller (QL2-1407) - Logic board (QM2-3827) - Paper feed motor (QM2-3873) 4 times Purge cam sensor error [5C00] An error occurred in the purge unit. - Purge unit (QM2-3754) - Logic board (QM2-3827) 5 times ASF (cam) sensor error  This error takes place when feeding paper from the ASF after an error occurred in the ASF cam sensor. - Sheet feed unit (QM2-3762) - ASF_PE sensor board (QM2-3877) - Logic board (QM2-3827) 6 times Internal temperature error  The internal temperature is not proper. - Logic board (QM2-3827) - Carriage unit (QM2-3753) 7 times Ink absorber full [5B00, 5B10, 5B01, 5B11] The ink absorber is full. Error codes: Overseas: 5B00: Main ink absorber 5B10: Borderless-print ink absorber Japan: 5B01: Main ink absorber - Ink absorber kit (QY5-0178) 1-5 Note: Before replacement of the logic board ***'y, check the ink absorber counter value (by service test print or EEPROM information print). If the counter value is 7% or more, also replace the ink absorber kit (QY5-0178) when replacing the logic board ***'y, or register the current ink absorber counter value to the replaced new logic board instead. [See 3-3. Adjustment / Settings, (9) Service mode, for details.] 2-3. Other Error Messages 5B11: Borderless-print ink absorber 8 times Print head temperature rise error  The print head temperature exceeded the specified value. - Print head (QY6-0070) - Logic board (QM2-3827) 9 times EEPROM error  A problem occurred in writing to the EEPROM. - Logic board (QM2-3827) 10 times VH monitor error [B200] The internal temperature exceeded the specified value. - Print head (QY6-0070) - Carriage unit (QM2-3753) - Logic board (QM2-3827) 12 times PG position error [5C10] An error occurred in the PG motor during purging operation. - Sheet feed unit (QM2-3762) - Logic board (QM2-3827) - Purge unit (QM2-3754) 15 times USB Host VBUS overcurrent  The USB Host VBUS is overloaded. - Logic board (QM2-3827) 19 times Ink tank position sensor error  None of the ink tank position is detected. - Spur base unit (QM2-3750) - Logic board (QM2-3827) 20 times Other hardware error  The PCI bus error is detected by the ASIC. - Logic board (QM2-3827) 22 times Scanner home position error  The scanner unit cannot detect the home position, or the scanner unit warming-up is not performed properly at power-on. On the LCD, "Scanner is not operating correctly." is displayed. - Scanner unit (QM2-3775) Alarm and Power LEDs lit ROM error, RAM error A flash ROM or RAM checksum error occurred at hard-power-on. - Logic board (QM2-3827)
try typing this at a command prompt and reboot diskperf -y
DISKPERF [-Y[D|V] | -N[D|V]] [\\computername]
-Y Sets the system to start all disk performance counters when the system is restarted.
-YD Enables the disk performance counters for physical drives when the system is restarted.
-YV Enables the disk performance counters for logical drives or storage volumes when the system is restarted.
-N Sets the system to disable all disk performance counters when the system is restarted.
-ND Disables the disk performance counters for physical drives.
-NV Disables the disk performance counters for logical drives.