Toyota Corolla Repair Manual: Inspection procedure
Hint
:
- if different dtcs related to different systems that have terminal e2 as the ground terminal are output simultaneously, terminal e2 may be open.
- If dtc p0441 (purge flow), p0446 (vsv for ccv), p0451, p0452 or p0453 (evaporative pressure sensor) is output with dtc p0442 or p0456, troubleshoot dtc p0441, p0446, p0451, p0452 or p0453 first. If no malfunction is detected, troubleshoot dtc p0442 or p0456 next.
- 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.
- If the engine run time in the freeze frame data is less than 200 seconds, carefully check the vapor pressure sensor.
1 Inspect ecm(vc voltage)
- Turn the ignition switch on.
- measure the voltage between the terminals of the e3 ecm connector.
Standard:
2 Inspect ecm(ptnk voltage)
- Turn the ignition switch on.
- measure the voltage between the terminals of the e3 and e6 ecm connectors.
- Disconnect the vacuum hose from the vapor pressure sensor.
Standard (1):
- Using the mityvac (hand–held vacuum pump), apply a vacuum of 4.0 Kpa (30 mmhg, 1.18 In.Hg) to the vapor pressure sensor.
Notice
: the vacuum applied to the vapor pressure sensor must be less than 66.7 Kpa (500 mmhg, 19.7 In.Hg).
Standard (2):
- Reconnect the vacuum hose.
3 Check harness and connector(vapor pressure sensor – ecm)
- Disconnect the v4 vapor pressure sensor connector.
- disconnect the e3 and e6 ecm connectors.
- check the resistance between the wire harness side connectors.
Standard (check for open):
Standard (check for short):
- Reconnect the ecm connectors.
- reconnect the vapor pressure sensor connector.
Replace vapor pressure sensor assy
Monitor description
Dtc p0451, p0452 or p0453 is recorded by the ecm when the vapor pressure
sensor malfunctions.
P0451
The ecm senses pressure in the fuel tank using the vapor pressure sensor. The
ecm supplies t ...
Vehicle speed sensor ”a”
Dtc p0500 vehicle speed sensor ”a” ...
Other materials:
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 ...
Overhaul
1. Remove control shift lever bush
Remove the control shift lever bush from the selecting
bellcrank assy.
2. Remove selecting bellcrank dust cover no.1
Remove the selecting bellcrank dust cover no.1 From the
selecting bellcrank assy.
3. Remove selecting bell crank no.2
...
On–vehicle inspection
1. Inspection throttle body idle speed control valve assy
Notice:
it is impossible to check the resister value and the operation
of isc valve by itself, because the isc valve
has an ic circuit inside it, which transforms the duty
signal from the ecm to the derive signal.
After check ...