Step
| Action
| Value(s)
| Yes
| No
|
1
| Did you perform the HVAC Diagnostic System Check?
| --
| Go to
Step 2
| Go to
Diagnostic System Check
|
2
|
Impotrant:: In order to execute the HVAC Recalibration command, the scan tool disrupts
keep alive memory (KAM) causing DTC B1652 (Loss of KAM) to be set as history.
- Install a scan tool.
- Turn ON the ignition, with the engine OFF.
- Use the scan tool in order to clear the current and history DTCs
in Heating and Air Conditioning.
- With a scan tool, perform the HVAC Recalibration command in Heating
and Air Conditioning Special Functions.
- With a scan tool, observe the current DTC list in Heating and
Air Conditioning.
Does the scan tool display DTC B1340, B1341, B1343, or B1344?
| --
| Go to
DTC Table
| Go to
Step 3
|
3
|
- With a scan tool, observe the Min Left Temp Dr Pos and Max Left
Temp Dr Pos data parameters in the Heating and Air Conditioning data list.
- Subtract the Min Left Temp Dr Pos from the Max Left Temp Dr Pos.
Does the result of the calculation indicate that the actual travel of
the left temp door is within the specified range?
| 152-250 Counts
| Go to
Step 4
| Go to
Heated Air Inoperative
|
4
|
- With a scan tool, observe the Min Right Temp Dr Pos and Max Right
Temp Dr Pos data parameters in the Heating and Air Conditioning data list.
- Subtract the Min Right Temp Dr Pos from the Max Right Temp Dr
Pos.
Does the result of the calculation indicate that the actual travel of
the right temp door is within the specified range?
| 130-250 Counts
| Go to
Step 5
| Go to
Heated Air Inoperative
|
5
|
- With a scan tool, observe the Min HTR/DEF/AC Dr Pos and Max HTR/DEF/AC
Dr Pos data parameters in the Heating and Air Conditioning data list.
- Subtract the Min HTR/DEF/AC Dr Pos from the Max HTR/DEF/AC Dr
Pos.
Does the result of the calculation indicate that the actual travel of
the HTR/DEF/AC door is within the specified range?
| 210-250 Counts
| Go to
Step 6
| Go to
BI-Level Inoperative
|
6
|
- With a scan tool, observe the Min Air Inlet Dr Pos and Max Air
Inlet Dr Pos data parameters in the Heating and Air Conditioning data list.
- Subtract the Min Air Inlet Dr Pos from the Max Air Inlet Dr Pos.
Does the result of the calculation indicate that the actual travel of
the air inlet door is within the specified range?
| 140-250 Counts
| System OK
| Go to
Air Recirculation Inoperative
|
