DTC 1305

Fuel Pump Control Module (FPCM) (DTC: 1305)







SYSTEM DESCRIPTION
This system controls the fuel pump operation. The amount of fuel flow delivered from the fuel pump is altered between two flow rates (Non-turbocharger models) or three flow rates (Turbocharger models) by the FPCM operation. The FPCM determines the voltage applied to the fuel pump (and therefore fuel flow) according to the following conditions.




COMPONENT DESCRIPTION
The FPCM adjusts the voltage supplied to the fuel pump to control the amount of fuel flow. When the FPCM increases the voltage supplied to the fuel pump, the fuel flow is raised. When the FPCM decreases the voltage, the fuel flow is lowered.




DIAGNOSTIC TROUBLE CODE CONFIRMATION PROCEDURE

With Consult
1) Start engine and warm it up sufficiently.
2) Turn ignition switch "OFF" and wait at least 5 seconds.
3) Turn ignition switch "ON" and select "DATA MONITOR" mode with CONSULT.
4) Start engine and run it for at least 60 seconds at idle speed.

OR

With GST
1) Start engine and warm it up sufficiently.
2) Turn ignition switch "OFF" and wait at least 5 seconds.
3) Start engine and run it for at least 60 seconds at idle speed.
4) Select MODE 3 with GST.

OR

Without Scan Tools
1) Start engine and warm it up sufficiently.
2) Turn ignition switch "OFF" and wait at least 5 seconds.
3) Start engine and run it for at least 60 seconds at idle speed.
4) Turn ignition switch "OFF", wait at least 5 seconds and then turn "ON".
5) Perform "Diagnostic Test Mode II (Self-diagnostic results)" with ECM.




WIRING DIAGRAM







DIAGNOSTIC PROCEDURE

COMPONENT INSPECTION
FPCM

With Consult
1. Start engine and let it idle.










2. Perform "FPCM" in "ACTIVE TEST" mode with CONSULT.




3. Make sure of the following.
4. If NG, replace FPCM.

OR

Without Scan Tools
1. Start engine and warm it up sufficiently
2. Turn ignition switch "OFF" and wait for at least 5 seconds.
3. Start engine and let it idle.







4. Check voltage between terminals (1) and (2). The voltage should be within each of the following ranges at least one time within 60 seconds of starting engine.
5. If NG, replace FPCM.

CAUTION: Connect a suitable wire between the FPCM body and ground during inspection because the FPCM is body grounded type.