Check for damaged harness and terminals including rubber seals :

-. contact resistance, oxidation, corrosion, bent or broken terminals

-. harness connector connection, loose wires etc.

Check for poor connection between ECM and component :

-. backed out terminal, improper mating, broken locks and poor terminal to wire connection

ARE THE WIRES O.K ? & ARE THE CONNECTIONS O.K ?

YES

NO

DTCs listed below are stored in the scan tool

P1190

Check items with the scan tool and the multimeter

① Wiring harness inspection

② Check the fuse

③ Check the relay resistance

④ Wavefoam from the throttle solenoid valve

Specification

Erase DTC P1190

Wait 3 seconds and check the DTC.

IS THERE DTC P1190 INDICATED ?

YES

NO

Turn the ignition switch ON and measure the voltage at the throttle sol. valve terminal 1 and the throttle sol. valve terminal 2 individually.

ARE THERE THE BATTERY VOLTAGE ?

YES

NO

Connect the CH A probe of scan tool to the ECM terminal 15/C230-1 after turning the ignition switch off and then start the engine

Check the throttle sol. valve signal waveform while idling.

IS THERE THROTTLE SOL.VALVE SIGNAL WAVEFORM PRORERLY DISPLAYED ?

YES

NO

a.

Recheck open or short in the wire between the throttle sol. valve terminal 1 and the ECM terminal 15/C230-1.

b.

Replace a known - good ECM and recheck. If the signal waveform is displayed properly, replace the ECM

WAVEFORM ANALYSIS

This test should be inspected after depressing the HOLD mode at the operating range of the throttle actuator. The time T becomes shroter when the throttle actuator is opened increasingly. If the rectangular waveform pattern is distorted and omitted, replace the throttle actuator.

YES