Question about 1993 Saturn SL
While driving, i turned on the cruise control set at 65 mph. tried to turn it off by putting on break and did not shut off. tried using cruise control off button and still would not stop. the rpm were between 2 and 3000.
shut car off for two minutes, turn back on and still rpm the same. had to drive with break on most of the way. parked, disconnected battery. after couple hours, reconnected battery, turn car on..seem to reset rpm, however, now i have no cruise control ability. after two days, rpm stall at 1000.
no hissing sound from any hose or otherwise.
has this happened to you?
thank you in advance
The trans pan is on top and when it is removed for leak repairs or valvebody service,there is a 10 way electrical connector that has to be removed held in place by a 7mm screw.If care wasn't taken when it was re-installed you very well could have those problems.Also they may have pinched a wire under the valve body cover(pan).Or they may have knocked the ground wire off your trans range switch.Most likey related to the pan repair.hope this helps
Posted on May 22, 2009
No....the rpms differ from engine to engine and from manufacturer to manufacturer. RPM's are always higher at higher speeds.
Posted on Aug 25, 2009
Testimonial: "thank you very much"
SOURCE: I have an 03 saturn
sounds like a throttle sensor fault do to the fact that the saturn vue doesnt idle at 500 normally its uaually between 600-800. i suggest getting it hooked to a diagnostic machine to find wat the codes are cause im sure it will be several.
Posted on Nov 15, 2009
Testimonial: "not too sure, since the idle speed is always constant, it may in fact be 750, anyway the shutdown occurrs at random times without relation to the idle"
Sounds like a faulty throttle position sensor TPS. This is located on the outside of throttle body on the end of the throttle shaft. If there is no proper feedback of throttle position the ECu is unable to maintain a stable throttle and this in turn makes the gear change very erratic. It has three electrical connections. The device internally consists, most usually, of a curved carbon track with an electrical connection at both ends and a rotary contact slider that moves to a point on the curved carbon track determined by the amount that the throttle is open. The curved carbon track has a resistance associated with it so the voltage that is returned by the throttle contact tells the ECU the throttle position. When the throttle is closed the voltage is low (0 to 0.49 volts) and when fully open it is high (5 volts) The three electrical connections consist of the contact points at each end of the track and the middle connection is the sliding throttle contact. OK check that the wires are all where they should be. Put a volt meter on the connections and record the voltages. When the voltmeter is on the middle pin the voltage should vary evenly as the throttle is opened and closed: use the accelerator lever cam or, if you have remove the air filter piping, you can use your fingers on the throttle flap. If the voltages are uneven replace the TPS
Posted on May 10, 2010
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Dec 03, 2015 | Cars & Trucks
The On/Off switch
The Resume/Accel switch
The Set/Coast switch
The TCC brake switch
The stop lamp switch
The throttle actuator control (TAC) motor
The vehicle speed sensor
Cruise Control Engaged
The cruise control system will engage and adjust the vehicle speed based on the activation of the following cruise control switches:
The cruise control switches are located on the multifunction/turn signal lever.
The powertrain control module (PCM) monitors the signal circuits of the cruise control switches in order to determine when to capture and maintain the selected vehicle speed. The PCM uses the throttle actuator control (TAC) module motor in order to control the vehicle speed. For further information on the TAC System, refer to Throttle Actuator Control (TAC) System Description in Engine Controls - 4.2 L.
Ignition positive voltage is supplied from the 10 ampere HVAC 1 fuse to the cruise control switch via the ignition 3 voltage circuit. When the normally open cruise control On/Off switch is turned On, the switch closes and the PCM detects a high signal voltage on the cruise control on switch signal circuit. When the normally open Set/Coast switch is pressed, the switch closes and the PCM detects a high signal voltage on the cruise control set/coast switch signal circuit. To engage the cruise control system, turn the On/Off switch On and momentarily press the Set/Coast switch. The PCM will confirm that the cruise control enable criteria has been achieved. The PCM will engage the cruise control system and record the selected vehicle speed. The PCM sends a class 2 message to the instrument panel cluster in order to illuminate the cruise control indicator. Pressing the accelerator pedal, while the cruise control system is engaged, will allow the driver to override the cruise control system in order to accelerate the vehicle beyond the current set vehicle speed. When the accelerator pedal is released, the vehicle will decelerate and resume the current set vehicle speed. The driver can also override the current set vehicle speed via the Set/Coast switch and the Resume/Accel switch. When the cruise control system is engaged, pressing and holding the Set/Coast switch will allow the vehicle to decelerate from the current set vehicle speed without deactivating the cruise control system. When the Set/Coast switch is released, the PCM will record the vehicle speed and maintain the vehicle speed as the new set vehicle speed. When the cruise control system is engaged, momentarily pressing the Set/Coast switch will allow the vehicle to decelerate at 1.6 km/h (1 mph) increments for each time that the Set/Coast is momentarily pressed, with a minimum vehicle speed of 37 km/h (23 mph). When the normally open Resume/Accel switch is activated, the switch closes and the PCM detects a high signal voltage on the cruise control resume/accel switch signal circuit. Activating and holding the Resume/Accel switch, when the cruise control system is engaged, will allow the vehicle to accelerate to a greater vehicle speed than the current set vehicle speed. When the Resume/Accel switch is released, the PCM will record the vehicle speed and maintain the vehicle speed as the new set vehicle speed. When the cruise control system is engaged, momentarily activating the Resume/Accel switch will allow the vehicle to accelerate at 1.6 km/h (1 mph) increments for each time that the Resume/Accel switch is momentarily activated, with the maximum acceleration total of 16 km/h (10 mph) over the current set vehicle speed . Momentarily activating the Resume/Accel switch, after the cruise control system has been disengaged by pressing the brake pedal, will recall the previous set vehicle speed that is recorded in the PCM.
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