HVAC - Automatic

HVAC Component Views

Ambient Air Temperature Sensors




1 - Radiator Core Support
2 - Ambient Air Temperature Sensor (DF5)
3 - Ambient Air Temperature Sensor - HVAC (CJ2)

Left Front of Engine Compartment (Diesel)




1 - Engine
2 - Front Fascia
3 - A/C Low Pressure Switch (C67/CJ2)
4 - Surge Tank
5 - Engine Coolant Level Switch

Front of Engine Compartment (4.3L)




1 - Battery Current Sensor
2 - Mega Fuse
3 - A/C Low Pressure Switch (C67/CJ2)
4 - Fuse Block - Underhood
5 - Engine Control Module (ECM)
6 - A/C Refrigerant Pressure Sensor (C67/CJ2)
7 - Mass Airflow (MAF)/Intake Air Temperature (IAT) Sensor
8 - Battery - Right

Top of Engine Diesel




1 - Turbocharger Vane Position Control Solenoid Valve
2 - Glow Plug Control Module (GPCM)
3 - Fuel Rail Temperature (FRT) Sensor
4 - Intake Air Temperature (IAT) Sensor 2 Connector
5 - X128
6 - A/C Refrigerant Pressure Sensor (C67/CJ2)
7 - Generator - Left (K76)
8 - A/C Compressor Clutch (C67/CJ2)
9 - Engine Coolant Temperature (ECT) Sensor 1
10 - Engine Coolant Temperature (ECT) Sensor 2
11 - Camshaft Position (CMP) Sensor
12 - X127
13 - Generator - Right
14 - Manifold Absolute Pressure (MAP) Sensor
15 - Intake Air Heater (IAH) Module
16 - Intake Air Temperature (IAT) Sensor 2
17 - Fuel Heater
18 - A/C Low Pressure Switch (C67/CJ2)

Left Side of Engine (4.3L)




1 - Generator
2 - Throttle Body
3 - Transmission
4 - Park/Neutral Position (PNP) Switch
5 - Heated Oxygen Sensor (HO2S) Bank 1 Sensor 2
6 - Heated Oxygen Sensor (HO2S) Bank 1 Sensor 1
7 - Knock Sensor (KS) - 1
8 - Engine Coolant Temperature (ECT) Sensor
9 - A/C Compressor Clutch (C67/CJ2)

Right Rear of the Engine Compartment (Gas -4.3L)




1 - Battery - Right
2 - A/C Low Pressure Switch (C67/CJ2)
3 - A/C Compressor Clutch (C67/CJ2)
4 - A/C Refrigerant Pressure Sensor (C67/CJ2)
5 - Mass Air Flow (MAF)/Intake Air Temperature (IAT) Sensor

Front Headliner Components




1 - Inside Air Temperature Sensor - Front (CJ2)
2 - Cellular Microphone (UE1/U3U/UVB)
3 - Courtesy/Reading Lamps - Rear (Extended Cab/Crew Cab)
4 - Sunroof Switch (CF5)
5 - Sunshade - Right (DH6)
6 - Garage Door Opener (UG1)
7 - Onstar Button Assembly
8 - Inside Rearview Mirror (ISRVM)
9 - Courtesy/Reading Lamps - Front
10 - Windshield
11 - Sunshade - Left (DH6)

Front of the I/P -YE9

Front of the I/P -YE9:

1 - Driver Information Center (DIC) Switch (UK3)
2 - Instrument Panel Cluster (IPC)
3 - Radio
4 - Ambient Light/Sunload Sensor Assembly (CJ2)/Ambient Light Sensor (C67/C42)
5 - HVAC Control Module
6 - Inflatable Restraint I/P Module Disable Switch (C99)
7 - Power Take-Off (PTO) Switch
8 - Auxiliary Power Outlet - Front 2
9 - I/P Multifunction Switch Assembly (JL4/JF4/UD7/XA7)
10 - Auxiliary Power Outlet - Front 1
11 - Transfer Case Shift Control Switch (NQF/NQH)
12 - Trailer Brake Control Panel Switch (JL1)
13 - Headlamp and Panel Dimmer Switch

Front of the I/P +YE9

Front of the I/P +YE9:

1 - Instrument Panel Cluster (IPC)
2 - Inflatable Restraint Steering Wheel Module
3 - Shift Control Lever
4 - Ambient Light/Sunload Sensor Assembly (CJ2)/Ambient Light Sensor (C67/C42)
5 - Speaker - Center (UQA +Y91)
6 - Radio
7 - Inflatable Restraint I/P Module
8 - I/P Compartment Lamp
9 - HVAC Control Module
10 - Auxiliary Power Outlet - Front 2
11 - I/P Multifunction Switch Assembly (JL4/JF4/UD7/XA7)
12 - Auxiliary Power Outlet - Front 1
13 - Driver Information Center (DIC) Switch (UK3)
14 - Steering Wheel Control Switch Assembly - Right (UK3)
15 - Steering Wheel Control Switch Assembly - Left (K34/KA9)
16 - Trailer Brake Control Panel Switch (JL1)
17 - Headlamp and Panel Dimmer Switch
18 - Dimmer Control
19 - Transfer Case Shift Control Switch (NQF/NQH)
20 - Turn Signal Multifunction Switch

Upper Front Air Temperature Sensors (CJ2)




1 - Air Temperature Sensor - Upper Left
2 - Air Temperature Sensor - Upper Right

HVAC Module




1 - Air Temperature Actuator - Right
2 - Recirculation Actuator
3 - Junction Block - Right I/P C4
4 - G200
5 - Blower Motor
6 - Air Temperature Sensor - Lower Right
7 - Air Temperature Actuator - Left
8 - Blower Motor Control Module
9 - Air Temperature Sensor - Lower Left
10 - Mode Actuator