Engine - Coolant Temperature Sensor/Switch: Locations

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)

Front of the Engine (Gas - 4.3L)




1 - Throttle Body
2 - Manifold Absolute Pressure (MAP) Sensor
3 - Evaporative Emission (EVAP) Canister Purge Solenoid Valve
4 - Knock Sensor (KS) - 1
5 - Engine Block Heater
6 - Engine Coolant Temperature (ECT) Sensor
7 - Camshaft Position (CMP) Sensor
8 - Generator