Ignition "OFF".
Disconnect ESP switch connector.
Press the ESP switch.
Measure resistance between terminal "4" of the ESP switch component connector and terminal "5" of the ESP switch component connector.
Specification : Approx. below 1Ω - ESP switch is depressed.
Approx. ∞ Ω - ESP switch is not depressed.
Is the measured resistance within specifications?
YES
Fault is intermittent caused by poor connection in ESP switch line or was repaired and HECU memory was not cleared. Go to "Verification of Vehicle Repair" procedure.
NO
Substitute with a known-good ESP switch and check for proper operation. If problem is corrected, replace ESP switch and then go to "Verification of Vehicle Repair" procedure.