Dtc P0203: Fuel Injector Circuit / Open Malfunction-Cylinder 3 - Suzuki GRAND VITARA 2005 Service Manual

1A-40 Engine General Information and Diagnosis:
Troubleshooting
Check the connections on fuel injector No.2.
Check the ECM connections.
Repair if necessary.
Disconnect fuel injector No.2.
Measure the resistance of fuel injector No.2 between "C05-1" and "C05-2" terminals.
Replace the fuel injector if there is a short circuit (R = 0 Ω) or an open circuit (resistance = infinity).
Otherwise reconnect fuel injector No.2.
Check the following connections for continuity and make sure there is no interference resistance:
• Between "C05-2" wire of fuel injector No.2 connector and "C85-25" terminal of ECM connector
• Between "C05-1" wire of fuel injector No.2 connector and "C85-29" terminal of ECM connector
If the fault is still present: apply Test 8 of Fault Finding-Tests referring to "Test 8: Injector malfunction: ".
If the fault is still present, substitute a known-good ECM and recheck.

DTC P0203: Fuel Injector Circuit / Open Malfunction-Cylinder 3

CAUTION
!
• Cylinder number is counted from flywheel side.
• This fault can result in a rapid and significant fouling of the diesel particulate filter.
• This fault may appear if the wiring harness has been damaged.Follow the procedure described in
"Electrical Circuit Inspection Procedure: in Section 00 in related manual".
• This test enables the condition and the conformity of the engine wiring harness to be checked.
NOTE
• Conditions for applying fault finding procedures to stored faults:
The fault is declared present after the engine has been started.
• If CC.1, CC, or 1.DEF is present, the Red stop warning light (gravity 2 warning light) is lit.
• If CO is present the Injection warning light (gravity 1 warning light) is lit.
• If CO is still present, the Malfunction indicator light (MIL) will come on after three consecutive
driving cycles (starting +5 seconds + turn OFF ignition switch and wait 40 seconds.).
• If the fault is present, the injection on cylinder 3 is disabled.
• Use service wire for all operations on the ECM connectors.
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
CC.1
CO
CC
1.DEF
Detecting condition
Short circuit to +12 V
Open circuit
Short circuit
Fuel injector control
S5JB0B1104099