Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
2003 Isuzu Rodeo 2WD L4-2.2LFACTORY OEM SERVICE PROCEDURE
System Specifications
General Specifications
Heater Unit
Temperature control Reheat air mix system
Capacity 4.3 kw (3700 Kcal./hr.)
Airflow 280 cu.m/h
HEATER CORE
Type Fin and tube type
Element dimension 167 mm (6.6 in.) X 151 mm (5.9 in.) X 35 mm (1.4 in.)
Radiating area Approx. 2.4 sq.m
EVAPORATOR ASSEMBLY
Capacity 4.8 kw (4100 Kcal./hr.)
Airflow 430 cu.m/hr
EVAPORATOR CORE
Type AI-laminate louver fin type
Element dimension 235 mm (9.3 in.) X 224 mm (8.8 in.) X 60 mm (2.4 in.)
EXPANSION VALVE
Type External pressure equalizer type
THERMOSTAT SWITCH
Type Electronic thermostat
OFF: Below 1.0 ± 0.5 °C (33.8 ± 0.9 °F)
ON: Above 2.0 ± 0.3 °C (3.6 ± 0.5 °F)
CONDENSER
Type Parallel flow type
Radiation performance 112.9kw (11,100 Kcal./hr.)
RECEIVER/DRIER
Type Assembly includes sight glass with dual (triple) pressure switch (V6) or pressure sensor (L4)
Internal volume 300 cc (10 fl.oz.)
PRESSURE SWITCH
Dual pressure switch-
Low pressure control
ON: 205.9 ± 29.4 kPa (29.9 ± 4.3 psi)
OFF: 176.5 ± 24.5 kPa (25.6 ± 3.6 psi)
High pressure control
ON: 2353.6 ± 196.1 kPa (341.3 ± 28.4 psi)
OFF: 2942.0 ± 196.1 kPa (426.6 ± 28.4 psi)
Triple pressure switch (V6, A/T)
Low pressure control
ON: 196.3 ± 29.4 kPa (27.0 ± 4.3 psi)
OFF: 176.5 ± 19.6 kPa (25.6 ± 2.8 psi)
Medium pressure control
ON: 1471.0 ± 98.1 kPa (213.3 ± 14.2 psi)
OFF: 1078.7 ± 117.7 kPa (156.4 ± 17.7 psi)
High pressure control
ON: 2353.6 ± 196.1 kPa (341.3 ± 28.4 psi)
OFF: 2942.0 ± 196.1 kPa (426.6 ± 28.4 psi)
REFRIGERANT
Type HFC-134a
Specified amount 700 g (1.54 lbs.)
Heater Unit
Temperature control Reheat air mix system
Capacity 4.3 kw (3700 Kcal./hr.)
Airflow 280 cu.m/h
HEATER CORE
Type Fin and tube type
Element dimension 167 mm (6.6 in.) X 151 mm (5.9 in.) X 35 mm (1.4 in.)
Radiating area Approx. 2.4 sq.m
EVAPORATOR ASSEMBLY
Capacity 4.8 kw (4100 Kcal./hr.)
Airflow 430 cu.m/hr
EVAPORATOR CORE
Type AI-laminate louver fin type
Element dimension 235 mm (9.3 in.) X 224 mm (8.8 in.) X 60 mm (2.4 in.)
EXPANSION VALVE
Type External pressure equalizer type
THERMOSTAT SWITCH
Type Electronic thermostat
OFF: Below 1.0 ± 0.5 °C (33.8 ± 0.9 °F)
ON: Above 2.0 ± 0.3 °C (3.6 ± 0.5 °F)
CONDENSER
Type Parallel flow type
Radiation performance 112.9kw (11,100 Kcal./hr.)
RECEIVER/DRIER
Type Assembly includes sight glass with dual (triple) pressure switch (V6) or pressure sensor (L4)
Internal volume 300 cc (10 fl.oz.)
PRESSURE SWITCH
Dual pressure switch-
Low pressure control
ON: 205.9 ± 29.4 kPa (29.9 ± 4.3 psi)
OFF: 176.5 ± 24.5 kPa (25.6 ± 3.6 psi)
High pressure control
ON: 2353.6 ± 196.1 kPa (341.3 ± 28.4 psi)
OFF: 2942.0 ± 196.1 kPa (426.6 ± 28.4 psi)
Triple pressure switch (V6, A/T)
Low pressure control
ON: 196.3 ± 29.4 kPa (27.0 ± 4.3 psi)
OFF: 176.5 ± 19.6 kPa (25.6 ± 2.8 psi)
Medium pressure control
ON: 1471.0 ± 98.1 kPa (213.3 ± 14.2 psi)
OFF: 1078.7 ± 117.7 kPa (156.4 ± 17.7 psi)
High pressure control
ON: 2353.6 ± 196.1 kPa (341.3 ± 28.4 psi)
OFF: 2942.0 ± 196.1 kPa (426.6 ± 28.4 psi)
REFRIGERANT
Type HFC-134a
Specified amount 700 g (1.54 lbs.)
Factory Service Tools
Use the Manual With the Right Hardware
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.
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