Throttle Angle/Engine Coolant Temperature

Throttle Angle/Engine Coolant Temperature Description

The Throttle Angle/Engine Coolant Temperature Signal is used under normal running conditions to transmit the throttle angle to the Automatic Transmission Control Module.
While the vehicle is cranking, the line transmits the engine coolant temperature.

There are two diagnostic checks of the throttle angle signal.
A fault is detected if:
1. Frequency - The engine speed is greater than or equal to 580 RPM,
the throttle angle signal frequency is: not 91± 1 Hz
and
the pulse width modulation (PWM) duty cycle is less than 5% or greater than 94%.
2. Pulse check - The engine speed is greater than or equal to 580 RPM and the throttle angle signal has no presence of raising or falling edges.

For the diagnostic table, please refer to the individual codes (i.e. P1120 or P1121). P1120

If the above table does not include details of the following enabling conditions: - AT, ECT, vehicle speed range, and time after engine start-up then the state of these parameters has no influence upon the execution of the monitor.