Test Requirements
- the fuses OK.
- Battery voltage at least 12.5 volts.
- All electrical consumers such as, lights and rear window defroster, switched off.
- On vehicles with automatic transmission, selector lever in position "P" or "N".
- A/C switched off.
- Ground connections between engine/transmission/chassis OK.
- Ignition switched off.
Start diagnosis
-- Remove the engine cover with air filter. Refer to the Repair Information.
Checking internal resistance
-- Disconnect the Wastegate Bypass Regulator Valve -N75- electrical harness connector.
-- Using a multimeter, Check the Wastegate Bypass Regulator Valve -N75- terminals 1 to 2 for resistance.
Specified value: 12 to 18 Ω (at approx. 20°C)
If the specified value was Not obtained:
-- Replace the Wastegate Bypass Regulator Valve -N75- Refer to the Repair Information.
If the specified value was obtained:
Checking Voltage supply
-- Switch the Ignition On.
-- Using a multimeter, Check the Wastegate Bypass Regulator Valve -N75- electrical harness connector terminal 1 to engine ground.
| Wastegate Bypass Regulator Valve -N75- electrical harness connector terminal | Measure to |
|---|---|
| 1 | Ground |
Specified value: Battery voltage.
-- Switch the ignition off.
If the specified value was Not obtained:
-- Check the wiring for a short circuit to ground, high resistance or an open circuit.
-- Check the electrical harness connector for damage, corrosion, loose or broken terminals.
-- If necessary, repair the wiring or connections and replace any open fuses.
If the specified value was obtained:
-- Remove the Engine Control Module (ECM) -J623-.
-- Using a multimeter, Check the Wastegate Bypass Regulator Valve -N75- electrical harness connector terminal to the Engine Control Module (ECM) -J623- electrical harness connector T60 terminal for an open circuit.
| Wastegate Bypass Regulator Valve -N75- electrical harness connector terminal | Engine Control Module (ECM) -J623- electrical connector T60 terminal |
|---|---|
| 2 | 20 |
Specified value: 1.5 Ω max.
If the specified value was Not obtained:
-- Check the wiring for an open or high resistance.
-- Check the electrical harness connector for damage, corrosion, loose or broken terminals.
-- If necessary, repair the faulty wiring connection.
If no malfunction is detected in the wiring and if the voltage supply was OK:
-- Replace the Engine Control Module (ECM) -J623-. Refer to the Repair Information.
-- Install the engine cover with air filter. Refer to the Repair Information.