Scan Tool Output Controls. Chevrolet Blazer - 4WD - RHD 2001

GM Service Manual Online

For 1990-2009 cars only

Makes 🢒 Chevrolet 🢒 2001 🢒 Blazer - 4WD - RHD 🢒 HVAC 🢒 HVAC Systems - Automatic 🢒 Scan Tool Output Controls

Table 1:	HVAC Control Module Scan Tool Output Controls
Table 2:	PCM Scan Tool Output Controls

HVAC Control Module Scan Tool Output Controls

Scan Tool Output Control	Additional Menu Selection(s)	Description
A/C LED	Miscellaneous Test	The HVAC control module illuminates the A/C indicator LED when you select ON. The LED should remain illuminated until commanded OFF.
A/C Request	Miscellaneous Test	The HVAC control module sends an A/C request signal to the PCM when you select ON. The PCM should energize the A/C compressor clutch relay. The A/C compressor clutch relay should remain energized until commanded OFF.
Blower Motor	Miscellaneous Test	The HVAC control module commands the blower motor on to maximum speed when you select ON. The blower motor should operate at maximum speed until commanded OFF.
Mix Motor	Miscellaneous Test	The HVAC control module commands the air temperature actuator towards 255 counts when you select ON. The HVAC control module commands the air temperature actuator towards 0 counts when commanded OFF.
Sol.1-Defroster	Solenoid Test	The HVAC control module energizes the solenoid when you select ON. The solenoid should remain energized until commanded OFF. Blower motor operation is disabled during this test.
Sol.2-Heater	Solenoid Test	The HVAC control module energizes the solenoid when you select ON. The solenoid should remain energized until commanded OFF. Blower motor operation is disabled during this test.
Sol.3-Defrost/Heater	Solenoid Test	The HVAC control module energizes the solenoid when you select ON. The solenoid should remain energized until commanded OFF. Blower motor operation is disabled during this test.
Sol.4-Air Inlet	Solenoid Test	The HVAC control module energizes the solenoid when you select ON. The solenoid should remain energized until commanded OFF. Blower motor operation is disabled during this test.
Sol.5-A/C Mode	Solenoid Test	The HVAC control module energizes the solenoid when you select ON. The solenoid should remain energized until commanded OFF. Blower motor operation is disabled during this test.

PCM Scan Tool Output Controls

Scan Tool Output Control	Additional Menu Selection(s)	Description
A/C Relay	Engine Output Controls	The PCM energizes the A/C compressor clutch relay when you select ON. The A/C compressor clutch should remain engaged until commanded OFF.