1992 Cadillac Eldorado A/C & Heater Service (ONLINE REPAIR MANUALS)

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A/C & HEATER SERVICE PROCEDURES FOR 1992 Cadillac Eldorado AUTOMOBILES

Air Conditioner and Heater Service Includes module configuration procedures, general service, maintenance, automatic temperature control, compressor services, electric cooling fans, vacuum diagrams, specifications, and manual air conditioning and heater diagnostics and replacement procedures for domestic and imported 1992 Cadillac Eldorado cars and light trucks from 1990+

Component Replacement & Adjustment -> Eldorado, Riviera, Seville, Toronado & Trofeo -> COOLING SYSTEM BLEED
Vehicle: 1992 Cadillac Eldorado 4.9 V8 GAS

To be performed after cooling system has been drained, flushed and is ready to be refilled.

  • Fill cooling system with a 50/50 mixture of antifreeze and water, to just below filler neck.
  • Fill coolant recovery reservoir to specified fill mark on the outside of reservoir.
  • Run engine with the radiator cap removed, until norm...

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A/C & HEATER SERVICE PROCEDURES FOR 1992 Cadillac Eldorado AUTOMOBILES

Air Conditioner and Heater Service Includes module configuration procedures, general service, maintenance, automatic temperature control, compressor services, electric cooling fans, vacuum diagrams, specifications, and manual air conditioning and heater diagnostics and replacement procedures for domestic and imported 1992 Cadillac Eldorado cars and light trucks from 1990+

Cooling Fans -> Passenger Cars Except Saturn -> CENTURY -> 2.5L (VIN R) Engine -> 3.3L Engine -> COOLANT FAN DOES NOT TURN OFF WITH ENGINE COOLANT COOL, A/C OFF & IGNITION SWITCH IN RUN -> COOLANT FAN DOES NOT TURN ON -> COOLANT FAN DOES NOT TURN ON WITH A/C ON -> COOLANT FAN DOES NOT TURN ON WITH A/C ON & A/C HEAD PRESSURE ABOVE 200 PSI -> DESCRIPTION -> Less Heavy Duty Cooling -> SYSTEM CHECK -> SYSTEM DIAGNOSIS -> SYSTEM DIAGNOSIS & TESTING -> TROUBLESHOOTING -> With Heavy Duty Cooling
Vehicle: 1992 Cadillac Eldorado 4.9 V8 GAS

DESCRIPTION

2.5L (VIN R) Engine

The coolant fan is turned on and off by the ECM, based on inputs from the coolant temperature sensor, vehicle speed sensor and the A/C system. Battery voltage is applied at all times to terminal A of the coolant fan relay and when the ignition switch is turned to the RUN position, voltage is applied to terminal D of the relay. The ECM energizes the coolant fan relay by grounding the dark green/yellow wire circuit (335). The relay energizes and battery voltage is applied to the coolant fan. The ECM opens circuit 335 to de-energize the rela...

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A/C & HEATER SERVICE PROCEDURES FOR 1992 Cadillac Eldorado AUTOMOBILES

Air Conditioner and Heater Service Includes module configuration procedures, general service, maintenance, automatic temperature control, compressor services, electric cooling fans, vacuum diagrams, specifications, and manual air conditioning and heater diagnostics and replacement procedures for domestic and imported 1992 Cadillac Eldorado cars and light trucks from 1990+

Manual Air Conditioning & Heater System Diagnosis & Testing -> Passenger Cars -> A/C COMPONENT DIAGNOSIS & TESTING -> 1992 CAMARO & FIREBIRD -> 1992 CAPRICE, CUSTOM CRUISER & ROADMASTER -> 1992 METRO -> 1992 PRIZM -> 1993 CAMARO & FIREBIRD -> 1993 CAPRICE & ROADMASTER -> 1993 METRO -> ACHIEVA, GRAND AM & SKYLARK -> BERETTA & CORSICA -> BLOWER MOTOR -> Blower Motor Test -> Blower Resistor Assembly Test -> Blower Switch Test -> BONNEVILLE, 88 & 98 -> CAPRICE, CUSTOM CRUISER & ROADMASTER -> CAVALIER & SUNBIRD -> CENTURY & CUTLASS CIERA -> COMPRESSOR -> CORVETTE -> CUTLASS SUPREME, GRAND PRIX & LUMINA -> High Blower Relay Test -> Isolation Tests -> LEMANS -> Mode Selector Test (Cavalier) -> Mode Selector Test (Sunbird) -> STORM -> Symptom Table -> Test A: Blower Motor -> Test A: ECM Compressor Control -> Test B: A/C Compressor Clutch Test -> Test B: Blower High Speed Relay -> Test B: Blower Motor Relay -> Test C: A/C Compressor Function Control Test -> Test C: Blower Resistors -> Test D: A/C Control Relay -> Test D: Blower Switch Test -> Test E: A/C Mode Selector -> Test E: Control Relay Jumper
Vehicle: 1992 Cadillac Eldorado 4.9 V8 GAS

COMPRESSOR

1992 CAMARO & FIREBIRD
Isolation Tests

Refer to Figs. and , for A/C compressor isolation tests.

Test A: ECM Compressor Control

Refer to Figs. through , for ECM compressor control tests.

Test B: A/C Compressor Clutch Test

Refer to Fig. , for A/C compressor clutch test.

Test C: A/C Compressor Function Control Test

Perform the following test with the ignition switch in the RUN position (engine not running), A/C mode selector at NORM, and outside temperature above 60°F:

    ...

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A/C & HEATER SERVICE PROCEDURES FOR 1992 Cadillac Eldorado AUTOMOBILES

Air Conditioner and Heater Service Includes module configuration procedures, general service, maintenance, automatic temperature control, compressor services, electric cooling fans, vacuum diagrams, specifications, and manual air conditioning and heater diagnostics and replacement procedures for domestic and imported 1992 Cadillac Eldorado cars and light trucks from 1990+

Cooling Fans -> Passenger Cars Except Saturn -> RIVIERA, TORONADO & TROFEO -> COMPONENT REPLACEMENT -> Coolant Fan, Replace -> DESCRIPTION -> SYSTEM DIAGNOSIS & TESTING
Vehicle: 1992 Cadillac Eldorado 4.9 V8 GAS

DESCRIPTION

The coolant fans on these models consists of a fan located behind the radiator, and a fan mounted in front of the radiator.

The rear fan operates on two speeds, while the front fan operates only on high speed. Both fans are activated any time the coolant fans are in the high speed mode.

The fans will be activated by the ECM, when the engine cool...

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A/C & HEATER SERVICE PROCEDURES FOR 1992 Cadillac Eldorado AUTOMOBILES

Air Conditioner and Heater Service Includes module configuration procedures, general service, maintenance, automatic temperature control, compressor services, electric cooling fans, vacuum diagrams, specifications, and manual air conditioning and heater diagnostics and replacement procedures for domestic and imported 1992 Cadillac Eldorado cars and light trucks from 1990+

General Service Domestic Vehicles -> 1992-93 -> Oil Level Check -> Cherokee, Comanche, Monaco, Premier & Wrangler -> Chrysler Corp. -> Ford Motor Co. -> General Motors -> Saturn
Vehicle: 1992 Cadillac Eldorado 4.9 V8 GAS

Chrysler Corp.

Cherokee, Comanche, Monaco, Premier & Wrangler

Compressor oil level should be checked whenever system is discharged for service part replacement or after rapid loss of refrigerant.

This compressor is a high speed unit. Proper operation requires sufficient lubrication, but excess oil will reduce cooling efficiency.

  • Determine the mounting angle of the compressor, then compare angle to Figs. and , for acceptable oil level.
  • Remove oil filler plug and, looking through plug hole, turn front clutch plate to position piston connect...

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A/C & HEATER SERVICE PROCEDURES FOR 1992 Cadillac Eldorado AUTOMOBILES

Air Conditioner and Heater Service Includes module configuration procedures, general service, maintenance, automatic temperature control, compressor services, electric cooling fans, vacuum diagrams, specifications, and manual air conditioning and heater diagnostics and replacement procedures for domestic and imported 1992 Cadillac Eldorado cars and light trucks from 1990+

General Service Domestic Vehicles -> 1992-93 -> System Inspection -> COMPRESSOR -> CONDENSER -> EVAPORATOR -> RECEIVER-DRIER -> REFRIGERANT LINE RESTRICTIONS -> THERMOSTATIC EXPANSION VALVE
Vehicle: 1992 Cadillac Eldorado 4.9 V8 GAS

While a detailed diagnostic procedure for all air conditioning systems would be impractical due to the many variations in construction and operation, there are three fundamental components of a total diagnosis:

  • Refrigerant systems must have an adequate, but not excessive charge.
  • Determination must be made whether the refrigerant system is governed by a cycling clutch compressor or by valves which control evaporator pressure.
  • The air distribution system (blower motor, switches, vacuum lines and air ducts) must be operational before checking the refrigera...

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Click here to view more details1988 Cadillac Eldorado Relay, Rear, For A/C control, blower motor, radiator fan, and compressor; A high quality, direct fit OE replacement relay..

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