P1236

2UR-GSE ENGINE CONTROL: SFI SYSTEM: P1235: High Pressure Fuel Pump Circuit

DTC P1235 - High Pressure Fuel Pump Circuit

DTC P1236 - High Pressure Fuel Pump No. 2 Circuit

DESCRIPTION

The fuel pump for high pressure 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 intake side camshaft (bank 1 and bank 2).
The fuel pump for high pressure 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.

PROCEDURE

1. CHECK DTC





(a) Interchange the injector driver No. 1 and No. 2 Removal.
(b) Connect the Techstream to the DLC3.
(c) Turn the engine switch on (IG) and turn the Techstream ON.
(d) Clear DTCs DTC Check / Clear.
NOTICE: Before clearing the DTCs, write them down.
(e) Start the engine.
(f) Enter the following menus: Powertrain / Engine / Trouble Codes.
(g) Read the DTCs.
Result:






B -- REPLACE INJECTOR DRIVER
A -- Continue to next step.
2. INSPECT SPILL CONTROL VALVE





(a) Disconnect the spill control valve connector.
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:





(c) Reconnect the spill control valve connector.
NG -- REPLACE FUEL PUMP FOR HIGH PRESSURE
OK -- Continue to next step.
3. CHECK HARNESS AND CONNECTOR (INJECTOR DRIVER - SPILL CONTROL VALVE)





(a) Disconnect the injector driver connector.
(b) Disconnect the spill control valve connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance (Check for Open):

Injector Driver (No. 1)





Injector Driver (No. 2)





Standard Resistance (Check for Short):

Injector Driver (No. 1)





Injector Driver (No. 2)





(d) Reconnect the injector driver connector and spill control valve connector.
NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR (INJECTOR DRIVER - SPILL CONTROL VALVE)
OK -- Continue to next step.
4. CHECK HARNESS AND CONNECTOR (INJECTOR DRIVER - ECM)





(a) Disconnect the injector driver (No. 1) connector.
(b) Disconnect the injector driver (No. 2) connector.
(c) Disconnect the ECM connector.
(d) Measure the resistance according to the value(s) in the table below.
Standard Resistance (Check for Open):






Standard Resistance (Check for Short):





(e) Reconnect the injector driver connectors and ECM connector.
NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR (INJECTOR DRIVER - ECM)
OK -- REPLACE ECM