Toyota RAV4 (XA40) 2013-2018 Service Manual: Crankshaft position sensor "A"
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:
- The correct waveform is as shown.
- G2+ stands for the camshaft position (cmp) sensor signal, and ne+ stands
for the ckp sensor signal.
- Grounding failure of the shielded wire may cause noise in waveforms.
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:
- If no problem is found through this diagnostic troubleshoot procedure,
troubleshoot the engine
mechanical systems.
- Check the engine speed. The engine speed can be checked by using the
intelligent tester. To check,
follow the operation below:
- Connect the intelligent tester to the dlc3.
- Start the engine.
- Turn the tester on
- Select the following menu items: diagnosis / enhanced obd ii / data list
/ primary /
engine spd.
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.
- Read freeze frame data using the intelligent tester. Freeze frame data
records the engine condition
when malfunctions are detected. When troubleshooting, freeze frame data can
help determine if the
vehicle was moving or stationary, if the engine was warmed up or not, if the
air-fuel ratio was lean or
rich, and other data from the time the malfunction occurred.
- Read value using intelligent tester (engine spd)
- Connect the intelligent tester to the dlc3.
- Turn the ignition switch on.
- Turn the tester on.
- Select the following menu items: diagnosis /
enhanced obd ii / data list / primary / engine
spd.
- Start the engine.
- Read the values displayed on the tester while the engine
is running.
Standard:
correct values are displayed.
Hint:
- To check the engine speed change, display the graph
on the tester.
- If the engine does not start, check the engine speed
while cranking.
- If the engine speed indicated on the tester remains
zero (0), there may be an open or short in the
crankshaft position (ckp) sensor circuit.
- Inspect crankshaft position sensor (resistance)
- Disconnect the b22 ckp sensor connector.
- Measure the resistance between terminals 1 and 2.
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).
- Reconnect the ckp sensor connector.
- Check harness and connector (crankshaft position sensor - ecm)
- Disconnect the b22 ckp sensor connector.
- Disconnect the b30 ecm connector.
- Measure the resistance.
Standard resistance (check for open)
Standard resistance (check for short)
- Reconnect the ecm connector.
- Reconnect the ckp sensor connector.
- Check sensor installation (crankshaft position sensor)
- Check the ckp sensor installation.
Ok:
sensor is installed correctly.
- Check crankshaft position sensor plate (teeth of sensor plate)
- Check the teeth of the sensor plate.
Ok:
sensor plate does not have any cracks or
deformation.
- Replace crankshaft position sensor
- Check whether dtc output recurs
- Connect the intelligent tester to the dlc3.
- Turn the ignition switch on.
- Turn the tester on.
- Clear dtcs (see page es-35).
- Start the engine.
- Select the following menu items: diagnosis /
enhanced obd ii / dtc info / current codes.
- Read dtcs.
Hint:
If the engine does not start, replace the ecm.
Description
Flat type knock sensors (non-resonant type) have structures that can detect
vibrations over a wide band
of frequencies: between approximately 6 khz and 15 khz.
A knock sensor is ...
Description
The camshaft position (cmp) sensor consists of a magnet and an iron core
which is wrapped with copper
wire, and is installed onto the cylinder head. When the camshaft rotates, each ...
Other materials:
Removal
Disconnect cable from negative battery
terminal
Caution:
Wait at least 90 seconds after disconnecting the
cable from the negative (-) battery terminal to
prevent airbag and seat belt pretensioner activation.
Remove accelerator pedal rod
Disconnect the accelerator pedal position ...
Reassembly (2006/01- )
Install drive shaft bearing case subassembly
(for rh)
Install the bearing snap ring.
Using sst and a press, press in the drive shaft
bearing case to the inboard joint rh.
Sst 09527-10011, 09710-04081
Notice:
The bearing should be installed completely.
Using a snap rin ...
SRS airbags
The SRS airbags inflate when the vehicle is subjected to certain
types of severe impacts that may cause significant injury
to the occupants. They work together with the seat belts to
help reduce the risk of death or serious injury.
SRS airbag system
â– Location of the SRS airbags
SRS front airbags ...