Section 70 (Automatic Transmission Diagnosis - 4L80-E (Gasoline))
WARNING: This page does not describe the selected car, but rather 14 other vehicles, including the 1998 GMC Savana Special, 1998 GMC Savana Camper Special, 1998 GMC Savana, 1998 Chevrolet RV Cutaway, and 1998 Chevrolet Cutaway. However, it is still accessible from the selected car via links, so may be relevant.
- Description
- Operation
- Self-Diagnostic System
- Technical Service Bulletins
- Diagnostic Tests
- Notes
- INTRODUCTON
- Using Diagnostic Tests & Wiring Diagrams
- DTC P0218: Transmission Fluid OVERTEMPERATURE
- DTC P0502: Output Shaft Speed (OSS) Sensor Circuit Low Input
- DTC P0503: Output Shaft Speed (OSS) Sensor Circuit Intermittent
- DTC P0560: System Voltage Malfunction
- DTC P0711: Trans. Fluid Temperature (TFT) Sensor Circuit Range/Performance
- DTC P0712: Trans. Fluid Temperature (TFT) Sensor Circuit Low Input
- DTC P0713: Trans. Fluid Temperature (TFT) Sensor Circuit High Input
- DTC P0716: Input Speed Sensor Circuit Range/Performance
- DTC P0717: Input Speed Sensor Circuit No Signal
- DTC P0719: Brake Switch Circuit Low Input
- DTC P0724: Brake Switch Circuit High Input
- DTC P0730: Undefined Gear Ratio
- DTC P0741: Torque Converter Clutch (TCC) Circuit Inoperative (Stuck Off)
- DTC P0742: Torque Converter Clutch (TCC) Circuit Inoperative (Stuck On)
- DTC P0748: Pressure Control Solenoid (PCS) Electrical Malfunction
- DTC P0751: 1-2 Shift Solenoid ("A") Performance Malfunction
- DTC P0753: 1-2 Shift Solenoid ("A") Electrical Malfunction
- DTC P0756: 2-3 Shift Solenoid ("B") Performance Malfunction
- DTC P0758: 2-3 Shift Solenoid ("B") Electrical Malfunction
- DTC P1810: Transmission Fluid Pressure (TFP) Position Switch Malfunction
- DTC P1860: TCC Pulse Width Modulated (PWM) Solenoid Electrical Malfunction
- DTC P1870: Transmission Component Slipping
- DTC P1875: 4WD Low Circuit Malfunction
- Electronic Testing
- Connector Identification
- Wiring Diagrams