Fuel Pressure Sensor, Checking
Special tools and workshop equipment required
- Multimeter.
- Wiring diagram.
Test requirements
- The Fuel Pump (FP) Control Module -J538- OK.
- The Engine Control Module (ECM) - J623- fuses OK.
- The fuel filter OK.
- The battery voltage at least 12.5 V.
- All electrical consumers switched off (radiator fan must NOT run during test).
- A/C switched off.
- The fuel tank at least 1 /4 filled.
- The ignition switched OFF.
Test procedure
-- Perform a preliminary check to verify the customers complaint. Refer to PRELIMINARY CHECK
Start diagnosis
-- Remove the engine cover. Refer to the Repair information.
Checking voltage
-- Disconnect the Fuel Pressure Sensor -G247- electrical harness connector.
-- Switch the ignition ON.
-- Using a multimeter, check the Fuel Pressure Sensor -G247- view -1- electrical harness connector terminals for voltage.
| Fuel Pressure Sensor -G247- electrical harness connector terminals | Specified value |
|---|---|
| 1 to Battery Positive (B+) | Battery Voltage |
| 2 to Ground | 4.8 - 5 Volts |
| 3 to Ground | 5 Volts |
-- Switch the ignition OFF.
If the specified value was obtained:
-- Replace the Fuel Pressure Sensor -G247- : Refer to the Repair information.
If the specified value was Not obtained:
Checking wiring connections
-- Remove the Engine Control Module (ECM) -J623-. Refer to the Repair information.
-- Using a multimeter, check the Fuel Pressure Sensor -G247- electrical harness connector terminals to the Engine Control Module (ECM) -J623- electrical harness connector T60 terminals for an open circuit according to the wiring diagram.
| Fuel Pressure Sensor -G247- electrical harness connector terminals: | Engine Control Module (ECM) -J623- electrical connector T60 terminals: |
|---|---|
| 1 | 13 |
| 2 | 40 |
| 3 | 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.
-- Check the electrical harness connector for damage, corrosion, loose or broken terminals.
-- If necessary, repair the faulty wiring connection.
If the specified value was obtained:
-- Replace the Engine Control Module (ECM) -J623-. Refer to the Repair information.
-- Install the engine cover. Refer to the Repair information.
Final procedures
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 .