P1235

2GR-FSE ENGINE CONTROL SYSTEM: SFI SYSTEM: P1235: High Pressure Fuel Pump Circuit
P1235 - High Pressure Fuel Pump Circuit

DESCRIPTION

The high pressure side fuel pump is attached to the insulator, which is attached to the cylinder head cover. The pump activates according to the position of the cam on the exhaust side camshaft (right bank).

The high pressure side fuel pump increases the pressure of the fuel supplied from the fuel pump in the fuel tank to 4 to 13 MPa (40.8 to 132.6 kgf/cm2, 580 to 1885 psi) according to the operating condition, and it feeds the fuel to the fuel delivery pipe.





MONITOR STRATEGY





TYPICAL ENABLING CONDITIONS





TYPICAL MALFUNCTION THRESHOLDS





WIRING DIAGRAM





INSPECTION PROCEDURE

HINT
Read freeze frame data using the Techstream. The ECM records vehicle and driving condition information as freeze frame data the moment a DTC is stored. When troubleshooting, freeze frame data can be helpful in determining whether the vehicle was running or stopped, whether the engine was warmed up or not, whether the air-fuel ratio was lean or rich, as well as other data recorded at the time of a malfunction Freeze Frame Data.

PROCEDURE

1. INSPECT FUEL PUMP FOR HIGH PRESSURE

(a) Disconnect the E73 fuel pump for high pressure connector.





(b) Measure the resistance of the fuel pump for high pressure.

Standard resistance:





(c) Reconnect the fuel pump for high pressure connector.

NG -- REPLACE FUEL PUMP FOR HIGH PRESSURE
OK -- Continue to next step.

2. CHECK HARNESS AND CONNECTOR (INJECTOR DRIVER - FUEL PUMP FOR HIGH PRESSURE)

(a) Disconnect the E54 injector driver (EDU) connector.

(b) Disconnect the E73 fuel pump for high pressure connector.

(c) Measure the resistance.

Standard resistance (Check for open):





Standard resistance (Check for short):





(d) Reconnect the injector driver (EDU) connector.

(e) Reconnect the fuel pump for high pressure connector.

NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.

3. CHECK HARNESS AND CONNECTOR (INJECTOR DRIVER - ECM)

(a) Disconnect the E83 ECM connector.

(b) Disconnect the E53 injector driver (EDU) connector.

(c) Measure the resistance.

Standard resistance (Check for open):





Standard resistance (Check for short):





(d) Reconnect the ECM connector.

(e) Reconnect the injector driver (EDU) connector.

NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.

4. REPLACE INJECTOR DRIVER

NEXT -- Continue to next step.

5. CHECK DTC OUTPUT

(a) Clear DTCs DTC Check / Clear.

(b) Put the engine in inspection mode Inspection Mode Procedure.

(c) Connect the Techstream to the DLC3.

(d) Turn the Techstream on.

(e) Enter the following menus: Powertrain / Engine and ECT / Trouble Codes.

(f) Read the DTCs.

Result:





B -- REPLACE ECM Removal

A -- END