Test Procedure
-- Perform a preliminary check to verify the customers complaint. Refer to PRELIMINARY CHECK
Start diagnosis
-- Connect the scan tool.
-- Switch ignition ON.
-- Using the scan tool, check the throttle valve position (absolute) at idle stop:
| Diagnostic text | Specified value | |||
|---|---|---|---|---|
| Throttle valve position (absolute) | - | |||
|
3.0 to 25.0% | |||
-- Slowly depress the accelerator pedal to Wide Open Throttle (WOT) stop while observing the percentage display. The percentage display must increase uniformly.
-- Using the scan tool, check the throttle valve position (absolute) at Wide Open Throttle (WOT) stop:
| Diagnostic text | Specified value | |||
|---|---|---|---|---|
| Throttle valve position (absolute) | - | |||
|
84.0 to 97.0% | |||
-- Switch ignition OFF.
If the specified values are not obtained:
-- Remove the Throttle Valve Control Module -J338 - far enough so that the electrical connector terminals are accessible.
-- Disconnect the Throttle Valve Control Module -J338- electrical harness connector.
Checking resistance
-- Using a multimeter, check the Throttle Drive for Electronic Power Control (EPC) -G186- at the Throttle Valve Control Module -J338- terminals 3 to 5 for resistance.
Specified value: 1.0 to 7.0 Ω (at 20° C)
If the specified value was Not obtained:
-- Replace the Throttle Valve Control Module - J338-. Refer to the Repair Information.
If the specified value was obtained:
-- Check the voltage supply of the Throttle Valve Control Module -J338- from the Engine Control Module (ECM) -J623- as instructed below.
Checking voltage supply and wiring
-- Switch the ignition ON.
-- Using a multimeter, check the Throttle Valve Control Module -J338- electrical harness connector, terminals 2 to 6 for voltage from the ECM.
Specified value: 4.5 to 5.2 V
-- Switch the ignition OFF.
-- Continue with the wiring check:
disconnect to T90 connector for the Engine Control Module -J623- and remove the T94 connector