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.
Hand–held tester
1 Perform active test by hand–held tester(operate ocv)
- Connect the hand–held tester to the dlc3.
- start the engine and warm it up.
- turn the ignition switch on and push the hand–held tester main switch on.
- select the item ”diagnosis / enhanced obd ii / active test / vvt ctrl b1”.
- check the engine speed when operating the oil control valve (ocv) by the hand–held tester.
Standard:
2 Inspect camshaft timing oil control valve assy(ocv)
3 Inspect ecm(ocv signal)
- Inspection using the oscilloscope.
- during idling, check the waveform between the terminals of the e3 ecm connector.
Standard:
4 Check harness and connector(camshaft timing oil control valve (ocv) – ecm)
- Disconnect the c2 camshaft timing oil control valve connector.
- disconnect the e3 ecm connector.
- check the resistance between the wire harness side connectors.
Standard (check for open):
Standard (check for short):
- Reconnect the camshaft timing oil control valve connector.
- reconnect the ecm connector.
Check for intermittent problems
Obdii scan tool (excluding hand–held tester):
1 Inspect camshaft timing oil control valve assy(operate ocv)
- Disconnect the c2 camshaft timing oil control valve connector.
- apply positive battery voltage between the terminals of the camshaft timing oil control valve.
- check the engine speed.
Standard
: engine speed is rough idle or engine is stalled.
- reconnect the camshaft timing oil control valve connector.
2 Inspect ecm(ocv signal)
- Inspection using the oscilloscope.
- during idling, check the waveform between the terminals of the e3 ecm connector.
Standard:
3 Check harness and connector(camshaft timing oil control valve (ocv) – ecm)
- Disconnect the c2 camshaft timing oil control valve connector.
- disconnect the e3 ecm connector.
- check the resistance between the wire harness side connectors.
Standard (check for open):
Standard (check for short):
- Reconnect the camshaft timing oil control valve connector.
- reconnect the ecm connector.
Check for intermittent problems
Circuit description
The variable valve timing (vvt) system includes the ecm, the oil control
valve (ocv) and the vvt controller.
The ecm sends a target ”duty–cycle” control signal to the ocv. This control
signal, ...
Camshaft position ”a” –timing over
Dtc p0011 camshaft position ”a” –timing over–
advanced or system performance
(bank 1)
Dtc p0012 camshaft position ”a” –timing over–
retarded (bank 1) ...
Other materials:
Replacement
Hint: components:
1. Remove floor shift shift lever knob sub–assy
2. Remove console panel upper
3. Remove parking brake hole cover sub–assy
4. Remove console box sub–assy rear
5. Separate floor shift cable transmission control shift
Separate the end of the shift cable from the shift ...
Calculation formula for your vehicle
1 Cargo capacity
2 Total load capacity (vehicle capacity weight)
When 2 people with the combined weight of A lb. (kg) are riding in your vehicle,
which has a total load capacity (vehicle capacity weight) of B lb. (kg), the available
amount of cargo and luggage load capacity will be C lb. (kg ...
Checking monitor status
Hint:
”monitor result” indicates normal or malfunction of each
component and system when judgment has done.
1. How to read data
Connect the hand–held tester to the dlc 3.
enter ”monitor result” from ”diagnosis / enhanced
obd ii / monitor info / monitor result”
on the hand–held ...