Back-up power source circuit
PrecautionCatalyst system efficiency below threshold (bank 1)
Monitor description
The ecm uses sensors mounted in front of and behind the three-way catalytic
converter (twc) to
monitor its efficiency.
The first sensor, the air-fuel ratio (a/f) sensor, sends pre-catalyst
information to the ecm. The second
sensor, the heated oxygen (ho2) sensor, se ...
No signal from transmitter id
Description
The tire pressure warning valve and transmitter constantly sends radio waves
to the tire pressure warning
ecu.
Under the following conditions, the tire pressure warning antenna and receiver
is unable to receive the
signals from the tire pressure warning valve and transmitte ...
Cold start
Description
The electronic throttle control system (etcs) controls the engine idling
speed. The etcs operates the
throttle actuator to open and close the throttle valve, and adjusts the intake
air amount to achieve the
target idling speed.
In addition, the ecm retards the ignition timi ...