Dtc P0627: Fuel Pump "A" Control Circuit / Open - Suzuki GRAND VITARA 2005 Service Manual

1A-68 Engine General Information and Diagnosis:

DTC P0627: Fuel Pump "A" Control Circuit / Open

NOTE
• Conditions for applying fault finding procedures to stored faults:
The fault is declared present after the engine is started.
• Use service wire for all operations on the ECM connectors.
• This fuel pump is just for balancing the fuel level between the two chambers left side and right side
of the fuel tank.
Wiring Diagram
For wiring circuit and connector number, refer to "A-5 Engine and A/C Control System Circuit Diagram (DSL): in
Section 9A".
Detecting Condition
Displaying on SUZUKI scan tool
CO.0
COC.1
Troubleshooting for CO.0: Open circuit or short circuit to vehicle body ground
Check the condition of the fuel pump relay.
Check the ECM connections.
Repair if necessary.
Check the fuel pump relay mounting connections.
If these checks are correct,
Check the continuity and insulation from vehicle body ground of the following connections:
• Between "E28-4" wire of fuel pump relay mounting connector and "C85-21" terminal of ECM connector
• Between "E28-3" wire of fuel pump relay mounting connector and "E33-6" wire of main relay connector
Repair if necessary.
If the fault is still present, substitute a known-good ECM and recheck.
Troubleshooting for CC.1: Short circuit to +12 V
Check the condition of the fuel pump relay.
Check the ECM connections.
Repair if necessary.
Check the fuel pump relay mounting connections.
Check the continuity and insulation from +12 V of the following connection:
• Between "E28-4" wire of fuel pump relay mounting connector and "C85-21" terminal of ECM connector
Repair if necessary.
If the fault is still present, substitute a known-good ECM and recheck.
Detecting condition
Open circuit or short circuit to vehicle body ground
Short circuit to +12 V
S5JB0B1104148