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

1. Check if the stop lights go on and off normally when the brake pedal is depressed and released.

2 Inspect stop light switch assy

1. Check the resistance between the terminals when the switch is turned on and off.

Standard:

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

1. Turn the ignition switch on.
2.  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)

1. Disconnect the s9 stop light switch connector.
2.  disconnect the e5 ecm connector.
3.  check the resistance between the wire harness side connectors.

Standard (check for open):

Standard (check for short):

4. Reconnect the ecm connector.
5. reconnect the stop light switch connector.

Replace ecm

Obd ii scan tool (excluding hand–held tester):

1 Check operation of stop light

1. Check if the stop lights go on and off normally when the brake pedal is depressed and released.

2 Inspect stop light switch assy

1. Check the resistance between terminals when the switch on and off.

Standard:

3 Inspect ecm(stp voltage)

1. Turn the ignition switch on.
2.  measure the voltage between the terminals of the e4 and e5 ecm connectors.

Standard:

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

1. Disconnect the s9 stop light switch connector.
2.  disconnect the e5 ecm connector.
3.  check the resistance between the wire harness side connectors.

Standard (check for open):

Standard (check for short):

1. Reconnect the ecm connector.
2.  reconnect the stop light switch connector.

Replace ecm