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.
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HOMESERVICE MANUALSOLDSMOBILE1987CALAIS BASE, 2D COUPE, 2.5 U, AUTOMATICREPAIR AND DIAGNOSIS (SINGLE PAGE)ENGINE PERFORMANCETESTING & DIAGNOSIS2.3L VIN [D] CEC TESTS W/CODES
1987 Oldsmobile Calais Base, 2D Coupe, 2.5 U, Automatic
2.3L VIN [D] CEC Tests W/Codes
1987 Oldsmobile Calais Base, 2D Coupe, 2.5 U, AutomaticSECTION 2.3L VIN [D] CEC Tests W/Codes
- Diagnostic Circuit Check
- Symptom Flow Charts ("A" Charts)
- Chart A1 - No "Service Engine Soon" Light
- Chart A2 - No ALDL Data Or Won't Flash Code 12, "Service Engine Soon" ("SES") Light On Steady
- Chart A3 - Engine Cranks But Won't Run (1 Of 3)
- Chart A3 - Engine Cranks But Won't Run (2 Of 3)
- Chart A3 - Engine Cranks But Won't Run (3 Of 3)
- Chart A5 - Cranks But Won't Run (Fuel Pump CKT) (1 Of 2)
- Chart A5 - Cranks But Won't Run (Fuel Pump CKT) (2 Of 2)
- Chart A7 - Fuel System Diagnosis (1 Of 2)
- Fuel System Diagnosis (2 Of 2)
- Chart B1 - Restricted Exhaust System Check
- Diagnostic Code Flow Charts (Code Charts)
- Code 13 - Open Oxygen (O2) Sensor Circuit
- Code 14 - Coolant Sensor Circuit Shorted
- Code 15 - Coolant Sensor Circuit Open
- Code 21 - TPS Signal Voltage High
- Code 22 - TPS Signal Voltage Low
- Code 23 - Mat Sensor Signal Voltage High
- Code 24 - VSS Circuit
- Code 25 - Mat Sensor Signal Voltage Low
- Code 26 - Quad-Driver Error
- Code 33 - Map Sensor Voltage High
- Code 34 - Map Sensor Voltage Low
- Code 36 - Closed Throttle Airflow High
- Code 42 - Est Circuit Open Or Grounded
- Code 43 - Electronic Spark Control
- Code 44 - Lean Oxygen Sensor Value
- Code 45 - Rich Oxygen Sensor Value
- Code 51 - Faulty Mem-Cal
- Code 53 - Faulty Alternator, Voltage High
- Code 62 - Gear Switch Error
- Code 65 - Fuel Injector Current Low (1 Of 2)
- Code 65 - Fuel Injector Current Low (2 Of 2)
- Code 66 - A/C Pressure Sensor Voltage Out Of Spec
- Component Check Flow Charts (C Charts)
- Chart C1A - Park/Neutral Switch (Auto. Trans. Only)
- Chart C1D - Manifold Absolute Pressure (Map) Output Check
- Chart C1E - Power Steering Pressure Switch (PSPS)
- Chart C2A - Injector Balance Test
- Chart C2C - Idle Air Control (IAC) Valve Check
- Chart C3 - Canister Purge Valve Check
- Chart C4M - Integrated Direct Ignition (IDI) Misfire Diagnosis
- Chart C5 - Electronic Spark Control (ESC) System Check
- Chart C8A - Transmission Converter Clutch (TCC) Electrical Diagnosis
- Chart C8C - Manual Transmission Shift Light
- Chart C10 - A/C Clutch Control Circuit Diagnosis
- Chart C12 - Coolant Fan Functional Check
- Chart C12A - Coolant Fan Always On
- Chart C12B - No High Speed Fan Check
- Chart C12C - No Low Speed Fan Check
- Component Locations
- Terminal Identification
- Wiring Diagram
RENDER: 1.0x
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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.