CIRCUIT OPERATION
- When the throttle valve shaft rotates from the idle position to the fully opened position, the resistance between the TP sensor output terminal (terminal 1) and ground terminal (terminal 2) increases according to the degree of rotation.
- With the ignition switch in the "ON" position, voltage at pin 78 increases from approximately 0.7 volt at closed throttle, to approximately 5 volts at wide open throttle.
Refer to DTC 11: TP Sensor System (Short Circuit) .
Refer to DTC 11: TP Sensor System (Short Circuit) .
- The PCM (terminal 124) applies 5 volts to the A/T fluid temperature sensor output terminal (terminal 1).
- The A/T fluid temperature sensor circuit is grounded to the PCM (terminal 57).
- When the A/T fluid temperature is cold, the A/T fluid temperature sensor resistance is high. When the A/T fluid temperature is hot, the A/T fluid temperature sensor resistance is low.
Refer to DTC 15 .
The crankshaft position sensor power is supplied from the MFI relay (terminal 4) to the crankshaft position sensor (terminal 3). The crankshaft position sensor (terminal 1) is grounded by the PCM (terminal 16). The PCM (terminal 45) supplies 5 volts to the crankshaft position sensor output (terminal 2). The crankshaft position sensor detects the crank angle (position) of each cylinder, an d converts that data to pulse signals that are sent to the PCM.
- The input shaft speed sensor generates 0 <=> 5 volts pulse signal when the input shaft rotates. The pulse signal frequency increases with a rise in input shaft speed.
- The input shaft speed sensor is connected to the PCM (terminals 16 and 103) via the input shaft speed sensor connector (terminals 1 and 2).
- The PCM detects the input shaft speed by the signal input to terminal 103.
- The input shaft speed sensor generates the pulse signal as the teeth of the underdrive clutch retainer pass the magnetic tip of the sensor.
- The output shaft speed sensor generates a 0 <=> 5 volt pulse signal when the output shaft rotates. The pulse signal frequency increases with a rise output shaft speed.
- The output shaft speed sensor is connected to the PCM (terminals 16 and 104) via the output shaft speed sensor connector (terminals 1 and 2).
- The PCM detects the output shaft speed by the signal input to terminal 104.
- The output shaft speed sensor generates the pulse signal as the teeth of the transfer drive gear pass the magnetic tip of the sensor.
- Battery positive voltage is supplied to the stoplight switch (terminal 2).
- When the brake pedal is depressed, battery positive voltage is applied to the PCM (terminal 123).
- Battery positive voltage is applied to the Park/Neutral position switch (terminal 8) when the ignition switch is turned "ON."
- Battery positive voltage is applied to the PCM (terminal 101) when the selector lever is in the "P" range. The PCM judges that the selector lever is in the "P" range when the battery positive voltage is applied.
- Battery positive voltage is applied to the PCM terminal 108 (121, 102, 109, 122 or 110) when the selector lever is in the "R" range ("N," "D," "3," "2" or "L" range). The PCM judges that the selector lever is in the "R" range ("N," "D." "3," "2" or "L" range) when the battery positive voltage is applied.
Refer to DTC 27: Park/Neutral Position Switch System (Open Circuit) .
- The A/T control relay supplies battery positive voltage to the solenoid valve assembly (terminals 9 and 10).
- The solenoid valve closes when energized (on), and opens when not energized (off). The PCM energizes the solenoid valve based on input data from sensors such as the Throttle Position Sensor, Park/Neutral Position Switch, Stoplight Switch, Input Shaft Speed Sensor, Output Shaft Speed Sensor, and A/T Fluid Temperature Sensor.
- The PCM provides the ground to energize the solenoid. The amount of time that the circuit is grounded is displayed on scan tool MB991502 in percent.
- When the solenoid is energized or de-energized, fluid passes through the valve body and transaxle passages to apply and release components.
Refer to DTC 31: Low-Reverse Solenoid Valve System .
Refer to DTC 31: Low-Reverse Solenoid Valve System .
Refer to DTC 31: Low-Reverse Solenoid Valve System .
Refer to DTC 31: Low-Reverse Solenoid Valve System .
- The input shaft speed sensor generates a pulsed signal of 0 +/- 5 volts. The pulsed signal frequency increases with an increase in the input shaft speed.
- The PCM (terminal 103) continuously monitors the input shaft speed signal.
- The output shaft speed sensor generates a pulsed signal of 0 +/- 5 volts. The pulsed signal frequency increases with an increase in the output shaft speed.
- The PCM (terminal 104) continuously monitors the output shaft speed signal.
- A/T control relay (terminal 4) receives the battery positive voltage through a dedicated 20 amp fuse.
- When the ignition switch is turned to the "ON" position, the PCM (terminal 50) receives battery voltage from the ignition switch. The PCM (terminal 50) applies voltage to energize the A/T control relay (terminal 3). With the A/T control relay energized, system voltage is applied to the PCM (terminals 77 and 89).