Toyota Corolla (E120) 2002–2008 Repair Manual / Diagnostics / Sfi system / Stop light switch circuit / Inspection procedure
Toyota Corolla (E120): Inspection procedure
Hand–held tester:
1 Check operation of stop light
- Check if the stop lights go on and off normally when the brake pedal is depressed and released.


2 Inspect stop light switch assy

- Check the resistance between the terminals when the switch is turned on and off.
Standard:



3 Read value of hand–held tester(stp signal)

- Turn the ignition switch on.
- select the item ”diagnosis / enhanced obd ii / data list / all / stop light sw” and read its value displayed on the hand–held tester.
Standard:



4 Check harness and connector(stop light switch – ecm)

- Disconnect the s9 stop light switch connector.
- disconnect the e5 ecm connector.
- check the resistance between the wire harness side connectors.
Standard (check for open):

Standard (check for short):


- Reconnect the ecm connector.
- reconnect the stop light switch connector.


Replace ecm
Obd ii scan tool (excluding hand–held tester):
1 Check operation of stop light
- Check if the stop lights go on and off normally when the brake pedal is depressed and released.


2 Inspect stop light switch assy

- Check the resistance between terminals when the switch on and off.
Standard:



3 Inspect ecm(stp voltage)

- Turn the ignition switch on.
- measure the voltage between the terminals of the e4 and e5 ecm connectors.
Standard:



4 Check harness and connector(stop light switch – ecm)

- Disconnect the s9 stop light switch connector.
- disconnect the e5 ecm connector.
- check the resistance between the wire harness side connectors.
Standard (check for open):

Standard (check for short):


- Reconnect the ecm connector.
- reconnect the stop light switch connector.


Replace ecm
Other materials:
Towing with a wheel-lift type truck
► From the front
Release the parking brake.
► From the rear
Use a towing dolly under the front wheels.
Vehicles without a smart key system: When not using a towing dolly, turn the
engine switch to the “ACC” position and shift the shift lever to N.
Vehicles with a smart key ...
Circuit description
When a misfire occurs in the engine, hydrocarbons (hc) enter the exhaust in
high concentrations. If this hc
concentration is high enough, there could be an increase in exhaust emissions
levels. High concentrations
of hc passing through the catalyst also cause to temperature of the catalyst to ...
Circuit description
Shifting from 1st to o/d is performed in combination with on and off of the
shift solenoid valve s1 and s2
controlled by ecm. If an open or short circuit occurs in either of the solenoid
valves, the ecm controls the
remaining normal solenoid valve to allow the vehicle to be operated smoothly
...


