Hint:
The standard normal voltage between each pair of ecm terminals is shown in the table below. The appropriate conditions for checking each pair of terminals are also indicated. The result of checks should be compared with the standard normal voltage for that pair of terminals, displayed in the specified condition column. The illustration above can be used as a reference to identify the ecm terminal locations.
Hint:
*: The ecm terminal voltage is constant regardless of the output voltage from the sensor.
Waveform 1
Camshaft
timing oil control valve (ocv)
Heated oxygen
sensor
Hint:
In data list, item o2s b1 s2 shows the ecm input values from the heated oxygen sensor.
Injector no.
1 (To no. 4) Injection signal
Hint:
The wavelength becomes shorter as the engine rpm increases.
Knock sensor
Hint:
Crankshaft
position sensor and camshaft position
sensor
Hint:
The wavelength becomes shorter as the engine rpm increases.
Igniter igt
signal (from ecm to igniter) and igniter
igf signal (from igniter to ecm)
Hint:
The wavelength becomes shorter as the engine rpm increases.
Purge vsv
Hint:
If the waveform is not similar to the illustration, check the waveform again after idling for 10 minutes or more.
Vehicle speed
signal
Hint:
The wavelength becomes shorter as the vehicle speed increases.
Throttle
actuator positive terminal
Hint:
The duty ratio varies depending on the throttle actuator operation.
Throttle
actuator negative terminal
Hint:
The duty ratio varies depending on the throttle actuator operation.
Engine speed
signal
Hint:
The wavelength becomes shorter as the engine rpm increases.
Can
communication signal
Hint:
The waveform varies depending on the can communication signal.
Can
communication signal
Hint:
The waveform varies depending on the can communication signal.
Generator
Hint:
A constant value is not output, as the duty ratio varies depending on the electrical load and battery condition.
Generator
Hint:
A constant value is not output, as the duty ratio varies depending on the electrical load and battery condition.
Generator
Hint:
A constant value is not output, as the duty ratio varies depending on the electrical load and battery condition.
Pressure control solenoid "d" electrical (shift solenoid valve slt)
Description
Refer to dtc p2714 (see page ax-91).
Monitor description
When an open or short in the shift solenoid valve slt circuit is detected,
the ecm interprets this as a fault.
The ecm will illuminate the mil and store the dtc.
Monitor strategy
Typical enabling conditions
...
On-vehicle inspection
Inspect refrigerant pressure with
manifold gauge set
This method uses a manifold gauge set to locate
problem areas. Read the manifold gauge pressure
when these conditions are established. Test
conditions:
Temperature at the air inlet is 30 to 35°c (86 to
95°f).
Engine is ...
Sleep operation failure of occupant classification ecu
Description
During sleep mode, the occupant classification ecu reads the condition of
each sensor while the ignition
switch is off.
In this mode, if the occupant classification ecu detects an internal
malfunction, dtc b1796 is output.
Inspection procedure
Check for dtc
T ...