Toyota Corolla Repair Manual: Inspection procedure
Hint
: read freeze frame data using the hand-held tester or the obd ii scan tool. Freeze frame data records the engine conditions when a malfunction is detected. When troubleshooting, it is useful for determining whether the vehicle was running or stopped, the engine was warmed up or not, the air–fuel ratio was lean or rich, etc. At the time of the malfunction.
1 Read output dtc
- Clear the dtc.
- warm up the engine.
- run the engine at 3,000 rpm for 10 seconds or more.
- connect the hand–held tester or the obd ii scan tool to the dlc3.
- turn the ignition switch on and push the hand–held tester or the obd ii scan tool main switch on.
- select the item ”diagnosis / enhanced obd ii / dtc info / current codes”.
- read the dtcs.
Result :
2 Inspect knock sensor
- Check the knock sensor installation.
Torque: 20 nvm (204 kgf·cm, 15 ftvlbf)
3 Check harness and connector(ecm – knock sensor)
- Disconnect the e4 ecm connector.
- measure the resistance between terminals of the e4 ecm connector.
Standard:
- Reconnect the ecm connector.
4 Inspect ecm(knk1 voltage)
- Disconnect the e4 ecm connector.
- turn the ignition switch on.
- measure the voltage between terminals of the e4 ecm terminals.
Standard:
- Reconnect the ecm connector.
Check for intermittent problems
Notice
: fault may be intermittent. Check harness and connectors carefully.
5 Inspect knock sensor
- Remove the k1 knock sensor.
- measure the resistance between the terminals.
Standard:
- Reinstall the knock sensor.
Repair or replace harness or connector
Circuit description
A flat type knock sensor (non–resonant type) has the structure that can
detect the vibration in a wider band
of frequency from about 6 khz to 15 khz and has the following features.
Knock sensors ...
Crankshaft position sensor ”a”
circuit
Dtc p0335 crankshaft position sensor ”a”
circuit
Dtc p0339 crankshaft position sensor ”a”
circuit intermittent ...
Other materials:
Inspection procedure
Hint:
start the inspection from step 1 in case of using the hand–held tester and start
from step 2 in case of not
using the hand–held tester.
1 Read value of hand–held tester(skid control sensor)
Check that there is no difference between the speed value output from
the speed sensor displ ...
If a warning message or indicator is displayed (vehicles with a multi-information
display)
If a warning is shown on the multi-information display, stay calm and perform
the following actions:
1 Master warning light
The master warning light also comes on or flashes in order to indicate that a message
is currently being displayed on the multiinformation display.
2 Multi-information d ...
Inspection procedure
1 Check p squib circuit(airbag sensor assy center – instrument
panel passenger airbag assy)
Disconnect the negative (–) terminal cable from the battery,
and wait at least for 90 seconds.
disconnect the connectors between the airbag sensor
assy center and the instrument panel pas ...