Description
The crankshaft position (ckp) sensor system consists of a ckp sensor plate and a pickup coil.
The sensor plate has 34 teeth and is installed on the crankshaft. The pickup coil is made of wound copper wire, an iron core and magnet. The sensor plate rotates and, as each tooth passes through the pickup coil, a pulse signal is created. The pickup coil generates 34 signals per engine revolution. Based on these signals, the ecm calculates the crankshaft position and engine rpm. Using these calculations, the fuel injection time and ignition timing are controlled.
Reference: inspection using an oscilloscope.
Hint:
Monitor description
If there is no signal from the ckp sensor despite the engine revolving, the ecm interprets this as a malfunction of the sensor.
If the malfunction is not repaired successfully, a dtc is set 10 seconds after the engine is next started.
Monitor strategy
Typical enabling conditions
Typical malfunction thresholds
Component operating range
Wiring diagram
Inspection procedure
Hint:
The engine speed may be indicated as zero despite the engine revolving normally. This is caused by a lack of ne signals from the crankshaft position (ckp) sensor. Alternatively, the engine speed may be indicated as lower than the actual engine speed if the ckp sensor output voltage is insufficient.
Standard: correct values are displayed.
Hint:
Standard resistance
Hint:
Terms cold and hot refer to the temperature of the sensor. Cold means approximately -10 to 50°c (14 to 122°f). Hot means approximately 50 to 100°c (122 to 212°f).
Standard resistance (check for open)
Standard resistance (check for short)
Ok: sensor is installed correctly.
Ok: sensor plate does not have any cracks or deformation.
Hint:
If the engine does not start, replace the ecm.
Adjusting the position of and opening and closing the air outlets
Front center outlets
Direct air flow to the left or
right, up or down.
Turn the knobs to open or
close the vents.
Turn the knob to open or
close the vent for rear seat
occupants.
М
Direct air flow to the left or right,
up or down.
Open the vent.
Close the vent.
...
Transmission fluid temperature sensor "A" performance
Description
Refer to dtc p0710 (see page ax-46).
Monitor description
This dtc indicates that there is a problem with output from the atf
temperature sensor and that the
sensor itself is defective. The atf temperature sensor converts the atf
temperature to an electrical
resistance v ...
Downhill assist control operation switch (test mode dtc)
Description
The downhill assist control switch is connected to the skid control ecu in
the abs and traction
actuator.
Dtc c1379/74 can be detected when the downhill assist control switch sends the
downhill assist control
switch signal or test mode ends. Dtc c1379/74 is output only in t ...