Test procedure
Always set the parking brake first. This is done by turning the ignition on and lift the parking brake switch located on the center console. An amber light on the switch indicates the parking brake is activated. When instructed to "Turn the ignition On" during diagnostic testing, do not apply the brake pedal. Doing so will activate the Hybrid system. To keep the Hybrid system from arming, turn the ignition key to the right until it stops and release the key, keeping your foot OFF of the brake pedal. the ignition turns off in the same manner. Remove the key from the ignition switch after the ignition is turned off.
-- 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 value was 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 Valve Control Module -J338- terminals 3 to 5 for resistance.
Specified value: 1.8 to 4.8 Ω (at 20° C)
If the specified value was Not obtained:
-- Replace the Throttle Valve Control Module - J338-. Refer to the Service Information.
If the specified value was obtained:
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.
Specified value: 4.5 to 5.3 V
-- Switch the ignition OFF.
If the specified value was Not obtained:
Checking wiring
-- Remove the Engine Control Module (ECM) -J623-. Refer to the Service Information.
-- Using a multimeter, check the Throttle Valve Control Module -J338- electrical harness connector terminals to the Engine Control Module (ECM) -J623- electrical harness connector T60 terminals for an open circuit according to the chart below.
| Throttle Valve Control Module -J338- electrical harness connector terminals: | Engine Control Module (ECM) -J623- electrical connector T60 terminals: |
|---|---|
| 1 | 12 |
| 2 | 28 |
| 3 | 30 |
| 4 | 27 |
| 5 | 15 |
| 6 | 29 |
Specified value: 1.5 Ω max.
If the specified value was Not obtained:
-- Check the wiring for an open, high resistance or short to ground.
-- If necessary, repair the faulty wiring connection.
-- Check the electrical harness connector for damage, corrosion, loose or broken terminals.
If no malfunction is detected in the wiring and the voltage supply was Not OK:
-- Replace the Engine Control Module (ECM) -J623-. Refer to the Service Information.