For 1990-2009 cars

#### Electronic Component Malfunctions

Component/System | Can Effect
--- | ---
This table gives some general information about electronic component malfunctions. Use this information to become familiar with possible conditions caused by transmission/vehicle electrical components. Refer to the Diagnosis Tables for more specific information.
Throttle Position (TP) Sensor |

• | Shift Pattern (erratic)

• | Shift quality (firm or soft)

• | Engine (rough)

Automatic Transmission Output Shaft Speed (AT OSS) Sensor |

• | Shift Pattern (erratic)

• | TCC solenoid valve apply (at wrong time)

• | Shift quality (harsh or soft)

Transmission Fluid Pressure (TFP) Manual Valve Position Switch |

• | TCC solenoid valve apply (no apply if diagnostic code is set)

• | Shift pattern (no fourth gear in hot mode)

• | Shift quality (harsh)

• | Line pressure (high)

• | Manual downshift (erratic)

Automatic Transmission Fluid Temperature (TFT) Sensor |

• | TCC solenoid valve control (On or Off)

• | Shift quality (harsh or soft)

Engine Coolant Temperature (ECT) Sensor |

• | TCC solenoid valve control (no apply)

• | Shift quality (harsh)

Shift Solenoid valves | Gear application (wrong gear, only two gears, no shift)
Brake Switch |

• | TCC apply (no apply)

• | No 4th gear if in hot mode

System Voltage |

• | Line pressure (high)

• | Gear application (third gear only)

• | TCC control (no apply)

• | No 4th gear if in hot mode)

3-2 Control Shift Solenoid Valve Assembly |

• | Gear application (third gear only)

• | 3-2 Downshifts (flare or tie-up)

Pressure Control Solenoid |

• | Line pressure (high or low)

• | Shift quality (harsh or soft)

TCC Sol Valve |

• | TCC solenoid valve apply (no apply)

• | No 4th gear if in hot mode

Cruise Control | Delays 3-4 upshift and TCC apply during heavy throttle
Acceleration Slip Regulation (ASR) | Downshifts