Toyota Corolla (E120) 2002–2008 Repair Manual / Ignition / On–vehicle inspection
Toyota Corolla (E120): On–vehicle inspection
Notice
: ”cold” and ”hot” in these sentences express the temperature of the coils themselves. ”Cold” is from –10 c (14 f) to 50 c (122 f) and ”hot” is from 50 c (122 f) to 100 c (212 f).
1. Inspect ignition coil (with igniter) and spark test
- confirm dtc.
Notice
: if dtc is indicated, carry out troubleshooting in accordance with the procedure on the following dtc.
- check that the spark occurs.
- Remove the ignition coils (with igniter).
- Using a 16 mm (0.63 In) plug wrench, remove the spark plugs.
- Install the spark plugs to each ignition coils (with igniter), and connect the ignition coil connectors.
- Disconnect the 4 injector connectors.
- Ground the spark plugs.
- Check if spark occurs while engine is being cranked.
Notice
:
- be sure to ground the spark plug, when checking.
- Replace the ignition coil when it is given an impact.
- Do not crank the engine for more than 2 seconds.
Hint
: if the spark does not occur, do the test as follow.
- using a 16 mm (0.63 In.) Plug wrench, install the spark plugs.
Torque: 25 nvm (255 Kgf·cm, 18 ft·lbf)
- install the ignition coil with igniter.
Torque: 9.0 Nvm (92 Kgf·cm, 80 in.Vlbf)
Other materials:
Inspection procedure
Hint:
hand–held tester only:
narrowing down the trouble area is possible by performing ”a/f control” active
test (heated oxygen
sensor or other trouble areas can be distinguished).
perform active test using hand–held tester (a/f control).
Hint:
”a/f control” is the act ...
Circuit description
Refer to dtc p0120
Dtc no.
Dtc detection condition
Trouble area
P0121
The following condition is met 4 times. After the vehicle speed
has exceeded 19 mph (30 km/h) once, the throttle position
sensor output value is out of normal range when the throttle
...
Communication system
Horn system
Location
Problem symptoms table
Inspection
1. Inspect low pitched horn assy
Connect the positive (+) lead from the battery to the terminal
and the negative (–) lead to the horn body, and check
that the horn blows.
If the result is not as specified, replace the ...


