Toyota RAV4 (XA40) 2013-2018 Service Manual: Mil circuit
Description
The mil (malfunction indicator lamp) is used to indicate vehicle malfunction detections by the ecm.
When the ignition switch is turned on, power is supplied to the mil circuit, and the ecm provides the circuit ground which illuminates the mil.
The mil operation can be checked visually: when the ignition switch is first turned on, the mil should be illuminated and should then turn off. If the mil remains illuminated or is not illuminated, conduct the following troubleshooting procedure using the intelligent tester.
Wiring diagram
Inspection procedure
- Check that mil is illuminated
- Perform troubleshooting in accordance with the table below.
- Check whether mil turns off
- Connect the intelligent tester to the dlc3.
- Turn the ignition switch on and turn the tester on.
- Select the following menu items: diagnosis / enhanced obd ii / dtc info / current codes.
- Check if any dtcs have been stored. Note down any dtcs.
- Clear dtcs (see page es-35).
- Check if the mil goes off.
Standard: mil should go off.
- Check harness and connector (check for short in wire harness)
- Disconnect the a9 ecm connector.
- Turn the ignition switch on.
- Check that the mil is not illuminated.
Ok: mil is not illuminated.
- Reconnect the ecm connector.
- Check harness and connector (combination meter - ecm)
- Disconnect the a9 ecm connector.
- Disconnect the e19 combination meter connector.
- Measure the resistance.
Standard resistance (check for short)
- Reconnect the ecm connector.
- Reconnect the combination meter connector.
- Check that mil is illuminated
- Check if the mil is illuminated when the ignition switch is turned on.
Ok: mil should be illuminated.
- Check that engine starts
- Turn the ignition switch on.
- Start the engine.
Hint:
*: The intelligent tester cannot communicate with the ecm.
- Inspect combination meter assembly (mil circuit)
- Check the mil circuit (see page me-15).
Fuel pump control circuit
Description
When the engine is cranked, the starter relay drive signal output from the
star terminal of the ecm is
input into the sta terminal of the ecm, and ne signal generated by the
cranksha ...
Mass air flow meter
Components
...
Other materials:
Fog light switch
The fog lights offer
improved visibility in difficult
driving conditions,
such as in rain and fog.
Operating procedure
*1 or
*2 Turns the
fog lights off
Turns the fog lights on
*1:For the U.S.A.
*2:For Canada
â– Fog lights can be used when
The headlights are on in low beam. ...
General maintenance (2006/01- )
Inspect steering linkage and gear housing
Check the steering wheel free play.
Check the steering linkage for looseness or
damage.
Check that the tie rod ends do not have
excessive play.
Check that the dust seals and boots are not
damaged.
Check that the boot clamps are not ...
Can bus line
Description
When any dtc for the can communication system is output, first measure the
resistance between the
terminals of the dlc3 to specify the trouble area, and check that there is not a
short in the can main wire,
between the main wire, to +b, or to gnd.
Wiring diagram
Inspecti ...
