Fuel Pressure Regulator Valve -N276-, CHECKING
Observe all safety precautions: SAFETY PRECAUTIONS
View clean working conditions: CLEAN WORKING CONDITIONS
Use only gold-plated terminals when servicing any component with gold-plated electrical harness connector terminals.
For wiring diagrams, component locations, and connector views, Refer to the applicable wiring diagram.
Special tools and workshop equipment required
- Multimeter
- Wiring diagram
Test requirements
- The Engine Speed (RPM) Sensor -G28- OK.
- Battery voltage at least 12.5 volts.
- All electrical consumers such as, lights and rear window defroster, switched off.
- Vehicles with automatic transmission, shift selector lever into position "P" or "N".
- A/C switched off.
- Ground connections between engine/transmission/chassis OK.
- Ignition switched off.
Test procedure
-- Perform a preliminary check to verify the customers complaint. Refer to PRELIMINARY CHECK .
Start diagnosis
-- Remove the engine covers. Refer to the appropriate service information.
-- Disconnect the Fuel Pressure Regulator Valve -N276- electrical harness connector.
Checking internal resistance
-- Using a multimeter, check the Fuel Pressure Regulator Valve -N276- terminals 1 to 2 for resistance.
Specified value: Near 4.1 Ω (at approx. 20° C)
If the specified value was Not obtained:
-- Replace the Fuel Pressure Regulator Valve -N276-. Refer to the appropriate service information
-- Go to Final procedures
If the specified value was obtained:
Checking voltage
-- Switch the ignition ON.
-- Using a Multimeter, check the Fuel Pressure Regulator Valve -N276- electrical harness connector terminal 2 to Ground (GND) for voltage.
Specified value: Battery voltage.
-- Switch the ignition ON.
If the specified value was Not obtained:
-- Check for an open circuit or a short circuit to Ground (GND) in the wiring from the Fuel Pressure Regulator Valve -N276- electrical harness connector terminal 2 to the Fuse. Refer to applicable wiring diagram for fuse positions.
-- Check the electrical harness connector for damage, corrosion, loose or broken terminals.
-- If necessary, repair the faulty wiring connection.
-- Repair the circuit and replace any open fuses.
-- Go to Final procedures
If the specified value was obtained:
Checking wiring connections
-- Remove the Engine Control Module (ECM) - J623 -. Refer to appropriate service information.
-- Using a multimeter, check the Fuel Metering Valve -N290- electrical harness connector terminal to the Engine Control Module (ECM) -J623- electrical harness connector T60 terminal for resistance.
| Fuel Pressure Regulator Valve -N276- electrical harness connector terminal | Engine Control Module (ECM) -J623- electrical connector T60 terminal |
|---|---|
| 1 | 45 |
Specified value: 1.5 Ω Max.
If the specified value was Not obtained:
-- Check the wiring for an open circuit, a short circuit to each other, Battery voltage or Ground (GND).
-- If necessary, repair the faulty wiring connection.
If the specified value was obtained:
-- Erase the DTC memory. Refer to DIAGNOSTIC MODE 04 - ERASE DTC MEMORY .
-- Perform a road test to verify repair.
If the DTC does not return:
Repair complete, Generate readiness code. Refer to READINESS CODE .
-- End diagnosis.
If the DTC returns and no malfunction is found in the wiring and voltage supply was OK:
-- Remove the Engine Control Module (ECM) - J623 -. Refer to appropriate service information.
Assembly is performed in the reverse order of the removal, note the following:
Final procedures
-- Reinstall the engine cover with air filter, if necessary. Refer to the appropriate service information.
-- After the repair work, the following work steps must be performed in the following sequence:
- Check the DTC memory. Refer to DIAGNOSTIC MODE 03 - READ DTC MEMORY .
- If necessary, erase the DTC memory. Refer to DIAGNOSTIC MODE 04 - ERASE DTC MEMORY .
- If the DTC memory was erased, generate readiness code. Refer to READINESS CODE .