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 MANUALSCHEVROLET1994LUMINA BASEREPAIR AND DIAGNOSIS (SINGLE PAGE)TRANSMISSIONAUTOMATIC TRANSDIAGNOSIS - 4T60-E
1994 Chevrolet Lumina Base
Diagnosis - 4T60-E
1994 Chevrolet Lumina BaseSECTION Diagnosis - 4T60-E
- Application
- Description
- Operation
- Trouble Shooting
- Electronic Self-Diagnostics
- Diagnostic Charts
- Charts
- Code 14/P0118, Coolant Temp. Sensor Signal Voltage Low
- Code 15/P0117, Coolant Temp. Sensor Signal Voltage High
- Code 21/P0123, Throttle Position Sensor Signal Voltage High
- Code 22/P0122, Throttle Position Sensor Signal Voltage Low
- Code 24, Vehicle Speed Sensor 2.3L, 3.1L "L", "N" & "W" Bodies/3.4L & 3.8L "W" Bodies
- Code 27, Quad-Driver No. 1 Error 2.3L "N" Body
- Code 28, Gear Range Switch Circuit 3.1L "L" & "W"
- Code 28, Gear Range Switch Circuit 3.1L "N"
- Code 29, Quad-Driver No. 3 Error 2.3L "N" Body
- Code 38, Brake Switch Circuit
- Code 58, Trans. Temperature Sensor High Temperature 3.1L "L", "N" & "W" Bodies
- Code 59, Trans. Temperature Sensor Low Temperature 3.1L "L", "N" & "W" Bodies
- Code 72, Vehicle Speed Sensor Loss 3.1L "L" & "W" Bodies
- Code 79, Transaxle Fluid OVERTEMP 3.1L ""N" & "W" Bodies
- Code 80/90, Transaxle Component Slipping 3.1L "L", "N" & "W" Bodies
- Code 501/502, Vehicle Speed Sensor 3.1L "A" Body, 3.4L "W" Body, 3.8L "C", "H", "U" & "W" Bodies
- Code 705, Gear Range Switch Circuit
- Code 712, Transaxle Temperature Sensor Signal Voltage Low
- Code 713, Transaxle Temperature Sensor Signal Voltage High
- Code 740, TCC Circuit
- Code 755, Shift Solenoid "B" Problem
- Code 1640, Quad-Driver Error 3.1L "A" Body
- Code 1640, Quad-Driver Error 3.4L "W" Body
- Code 1640, Quad-Driver Error 3.8L "C", "H", "U" & "W" Bodies
- Code 1650, Quad-Driver Error 3.1L "A" Body
- Code 1650, Quad-Driver Error 3.4L "W" Body
- Code 1650, Quad-Driver Error 3.8L "C", "H", "U" & "W" Bodies
- Electronic Testing
- Testing Equipment & Procedures
- Component Tests (With Test Box)
- Component Tests (Without Test Box)
- Wiring Diagrams
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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.