Toyota Corolla (E120): Ecm power source circuit
Other materials:
On–vehicle inspection
1. Inspect speedometer
check the operation.
Using a speedometer tester, inspect the speedometer fro allowable
indication error and check
the operation of the odometer.
Reference:
Notice:
tire wear and tire over or under inflation will increase the indication error.
...
Inspection procedure
1 Check side squib(rh) circuit(airbag sensor assy center – front
seat airbag assy rh)
Disconnect the negative (–) terminal cable from the battery,
and wait at least for 90 seconds.
disconnect the connectors between the front seat airbag
assy (rh) and the airbag sensor assy center. ...
Malfunction in tachometer
Wiring diagram
Inspection procedure
Check output value of ecm.
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.
2 Inspect combinatio ...