Service Points

TRANSAXLE RANGE (TR) SWITCH
If a malfunction occurs in the wiring of the TR or TR switch, the powertrain control module (PCM) cannot determine the range position, and shifting may be abnormal in D, 2, and 1 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.

BRAKE SWITCH
If the brake switch is always ON, the torque converter clutch will not engage at less than 1/3 throttle.

If the brake switch is always OFF, the torque converter clutch will not disengage when the 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 way operate in second and third gear.

VEHICLE SPEEDOMETER SENSOR
If a malfunction occurs in the vehicle speedometer sensor, 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, at maximum current line pressure will be at minimum.

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

SHIFT SOLENOID NO.1 AND NO.2 (SST, 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 second/third gear (D range) and abnormal 3-2 downshifts and harsh 4-3 downshift.

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 SYSTEM
If a malfunction occurs in the Distributor ignition, the torque converter clutch will not engage, and shifting may be abnormal.

MAGNETIC CLUTCH
If the magnetic clutch is always ON, the line pressure will be slightly low with the A/C OFF.

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

MASS AIR FLOW SENSOR (MAP)
If a malfunction occurs in the MAP, shifting and torque converter clutch operation will be abnormal.

THROTTLE POSITION (TP) SENSOR
If a malfunction occurs in the TP, shifting and torque converter clutch operation will be abnormal.