Service Points

OUTLINE

Transmission Range (TR) Sensor

- It a malfunction occurs in the wiring of the TR or TR sensor, the powertrain control module (PCME) cannot determine the range position, and shifting may be abnormal in D, S, and L ranges. There may not be a shift to fourth gear, and all shifts will be firm.

Transaxle Fluid Temperature (TFT) Sensor

- If a malfunction occurs in the TFT sensor, the problem will be the torque converter clutch operation and EPC pressure control.

Stoplight Switch

- If the stoplight switch is always ON, the torque converter clutch will not engage at less the 1/3 throttle.

- If the stoplight switch is always OFF, the torque converter clutch will not disengage when brake is applied.

Turbine Shaft Speed Sensor (TSS)

- If a malfunction occurs in the TSS, the torque converter clutch will not engage, and shifting may be harsh. There may not be a shift to fourth gear and engine braking operate in 2nd and third gear.

Vehicle Speedometer Sensor (VSS)

- If a malfunction occurs in the VSS, shifting may be abnormal, the torque converter will not engage. There may not be all shift to fourth gear.

Electronic Pressure Control (EPC) Solenoid

- If the EPC is always ON, the line pressure will be high but not maximum.

- If the EPC is always OFF, the line pressure will be maximum and harsh engagements or harsh shift.

Shift Solenoid No.1 and No.2 (SS1, SS2)

- If a malfunction occurs in the SS1 or SS2, shifting may be abnormal.

3-2 Timing/Coasting Clutch Solenoid (3-2T/CCS)

- If the 3-2T/CCS is always ON, the engine braking will not operate (except in fourth gear) and will delay 3-2, 4-2 downshifts.

- If the 3-2T/CCS is always OFF, the engine braking will operate in 2nd/third gear (D range) and firm or flair 3-2 downshifts.


Torque Converter Clutch (TCC) Solenoid

- If the TCC is always ON, the torque converter clutch will not disengage.

- If the TCC is always OFF, the torque converter clutch will not engage.

Engine Coolant Temperature (ECT) Sensor

- If a malfunction occurs in the ECT, the TCC will always be OFF.

Distributor Ignition (DI) System

- If a malfunction occurs in the EI, the torque converter clutch will not engage, and shifting may be abnormal.

Magnetic Clutch

- If the magnetic clutch is always ON, line pressure slightly low with A/C OFF.

- If the magnetic clutch is always OFF, line pressure slightly high with A/C ON.

Mass Air Flow Sensor (MAF)

- If a malfunction occurs in the MAF, shifting and torque converter clutch operation will be abnormal.

Throttle Position Sensor (TP)

- If a malfunction occurs in the TP, shifting and torque converter clutch operation will be abnormal.