P1220

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 by the FPCM operation. The FPCM determines the voltage supplied 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 increased. When the FPCM decreases the voltage, the fuel flow is decreased.

Consult-II Reference Value In Data Monitor Mode:

ECM Terminals And Reference Value:

On Board Diagnosis Logic:

DIAGNOSTIC TROUBLE CODE CONFIRMATION PROCEDURE

CAUTION: Always drive at a safe speed.

NOTE: If "DIAGNOSTIC TROUBLE CODE CONFIRMATION PROCEDURE" has been previously conducted, always turn ignition switch "OFF" and wait at least 5 seconds before conducting the next test.

With Consult
1. Lift up vehicle.
2. Turn ignition switch "ON" and select "DATA MONITOR" mode with CONSULT-II.
3. Start engine (TCS switch "OFF").
4. Shift A/T selector lever to "D" position.
5. Hold vehicle speed at 70 to 100 km/h (43 to 62 MPH) for 12 seconds.
6. If 1st trip DTC is detected, go to "DIAGNOSTIC PROCEDURE".

OR

With Generic Scan Tool
Follow the procedure "With CONSULT-II" above.

EC-FPCM-01:

EC-FPCM-01 Connector View:

WIRING DIAGRAM

Super Multiple Junction (SMJ) Terminal Arrangement (B3, D1, D21, E66, M4, M6, M11, M12, M45, N1):

Super Multiple Junction (SMJ) Terminal Arrangement (B4, B101, E70, E81, F63, M3, M49, M50):

Fuse Block - Junction Block (J/B) Terminal Arrangement (B1, B2, E61, E62, E63, E64, M1):

Part 1:

Part 2:

DIAGNOSTIC PROCEDURE

COMPONENT INSPECTION

FPCM




With Consult
1. Start engine and let it idle.
2. Perform "FPCM" in "ACTIVE TEST" mode with CONSULT-II.
3. Check the following.
- When selecting "HI", "FPCM DR VOLT" indicates approximately 0 V.
- When selecting "LOW", "FPCM DR VOLT" indicates approximately 4.4 V

4. If NG, replace FPCM.

OR







Without Consult
1. Start engine and warm it up to normal operating temperature.
2. Turn ignition switch "OFF" and wait at least 5 seconds.
3. Start engine and let it idle.
4. Check voltage between terminals (1) and (2).

Within 30 seconds of starting engine:
Approximately 0 V
More than 30 seconds after starting engine:
Approximately 4.4 V

5. If NG, replace FPCM.




Dropping resistor
Check resistance between terminals (1) and (2)
Resistance: Approximately 0.8 ohm at 25 °C (77 °F)