Ford Mustang Service Manual: Heated Oxygen Sensor (HO2S)
Electronic Engine Controls (Description and Operation)
The electronic engine controls consist of the following:
- powertrain control module (PCM)
- throttle position (TP) sensor
- idle air control (IAC) valve
- engine coolant temperature (ECT) sensor
- cylinder head temperature sensor
- camshaft position (CMP) sensor
- crankshaft position (CKP) sensor
- mass air flow (MAF) sensor
- intake air temperature (IAT) sensor
- heated oxygen sensor (HO2S) - front
- catalyst monitor sensor - rear
- wheel speed sensor
The powertrain control module needs the following inputs to calibrate the engine correctly:
- crankshaft position
- engine rpm
- engine load (manifold pressure)
- atmospheric (barometric) pressure
- engine coolant temperature
The throttle position sensor:
- sends the powertrain control module a signal indicating the throttle plate angle.
- is the main input to the powertrain control module from the driver.
The idle air control valve:
- controls bypass air around the throttle plate at low speeds.
- is controlled by the powertrain control module.
The cylinder head temperature sensor:
- provides a gauge signal for coolant temperature.
- is mounted on rear of LH cylinder head.
- sends the powertrain control module a signal indicating engine temperature.
- resistance decreases as coolant temperature increases.
The camshaft position sensor:
- sends the powertrain control module a signal indicating camshaft position, used for fuel synchronization.
The crankshaft position sensor:
- sends the powertrain control module a signal indicating crankshaft position.
- is essential for calculating spark timing.
The mass air flow sensor:
- sends the powertrain control module a signal indicating mass air flow rate of air entering the engine.
The intake air temperature sensor:
- sends the powertrain control module a signal indicating the temperature of the air entering the engine.
The heated oxygen sensor:
- has the ability to create a voltage signal depending on exhaust oxygen content.
- provides feedback information to the powertrain control module used to calculate fuel delivery.
The rear catalyst monitor sensor:
- monitors oxygen content after the oxygen flows through the catalytic converter.
- provides a voltage to the powertrain control module used to calculate catalytic converter integrity.
The wheel speed sensor:
- sends a signal to the powertrain control module indicating wheel speed.
Mass Air Flow (MAF) Sensor - Mach I
Electronic Engine Controls (Description and Operation)
The electronic engine controls consist of the following:
powertrain control module (PCM)
throttle position (TP) sensor
idle air contr ...
Catalyst Monitor Sensor
Electronic Engine Controls (Description and Operation)
The electronic engine controls consist of the following:
powertrain control module (PCM)
throttle position (TP) sensor
idle air contr ...
Other materials:
USB port
WARNING: Driving while distracted can result in loss of vehicle control,
crash and injury. We strongly recommend that you use extreme caution when using
any device that may take your focus off the road. Your primary responsibility is
the safe operation o ...
Symptom Chart
Inspection and Verification
WARNING: Use of any other than the approved DOT 3 brake fluid will
cause permanent
damage to brake components and will render the brakes inoperative.
WARNING: Brake fluid contains polyglycol ethers and polyglycols. Avoid contact
...
Installation
Removal
Both mounts
1. Disconnect the battery ground cable. For additional information, refer to
Section.
2. Remove the coolant bypass tube. For additional information, refer to Section.
3. Rotate the drive belt tensioner clockwise and detach the drive belt ...