Toyota Corolla (E120) 2002–2008 Repair Manual / Diagnostics / Combination meter / Malfunction in speedometer
Toyota Corolla (E120): Malfunction in speedometer
Wiring diagram
Inspection procedure
1 Check combination meter assy
- Remove the combination meter assy with connector still connected.
- check voltage.
- Jack up either of the front wheels.
- Shift the shift lever to neutral.
- Turn the ignition switch to on.
- Measure the voltage between terminals c9–9 of combination meter assy and body ground when front wheel is turning slowly.
Standard voltage: voltage is generated intermittently.
Result:
Check and replace combination meter assy
2 Check obd ii scan tool or hand–held tester
- Check output value of skid control ecu.
- Connect the hand–held tester to dlc3.
- Turn the ignition switch to on and push the hand–held tester main switch on.
- Select the data list mode on the hand–held tester.
- Check that there is no difference between the speed value output
from the speed sensor displayed
by the hand–held tester and the speed value displayed by the speedometer
when driving
the vehicle.
Ok: there is almost no difference from the displayed speed value.
Repair or replace harness or connector
3 Inspect speedometer sensor
- Check voltage.
- Shift the shift lever to neutral.
- Jack up either of the front wheel.
- Turn the ignition switch to on.
- Measure voltage between terminals 3 and 2 of speed sensor when the front wheel is turning slowly.
Standard voltage: voltage is generated intermittently.
Repair or replace harness or connector
Other materials:
Refueling
Opening the fuel tank cap
Perform the following steps
to open the fuel tank cap:
Before refueling the vehicle
Turn the engine switch off and
ensure that all the doors and
windows are closed.
Confirm the type of fuel.
■Fuel tank opening for unleaded
gasoline
To help prevent incorrect fueling, ...
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 ...
Circuit description
The purpose of this circuit is to prevent the engine from stalling while
driving in lock–up condition, when
brakes are suddenly applied.
When the brake pedal is depressed, this switch sends a signals to the ecm. Then
the ecm cancels the operation
of the lock–up clutch while braking is i ...