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:
For your information
Main Owner’s Manual
Please note that this manual applies to all models and explains all equipment,
including options. Therefore, you may find some explanations for equipment not installed
on your vehicle.
All specifications provided in this manual are current at the time of printing.
However, ...
No sound is heard from speaker in all modes
Wiring diagram
Inspection procedure
1 Check lcd (liquid crystal display) for lighting
Lcd illumination check
turn the ignition switch acc.
Turn the radio receiver assembly on.
Standard: lcd illumination of the radio receiver assembly light.
2 Control fader and ...
Ecu power source circuit
Circuit description
This circuit provides power to operate the tvip ecu.
Wiring diagram
Inspection procedure
1 Check fuse (ecu–b)
Remove the fuse from the instrument panel j/b.
check the continuity of the fuse.
Standard: continuity
2 Check tvip ecu
Disconnect th ...