DTC P0203 [MZI-3.7]

id0102d2805800

DTC P0203

Injector circuit/open—cylinder No.3

DETECTION CONDITION

•  The CCM monitors the operation of the fuel injector drivers in the PCM. The test fails if the fuel injector circuitry is inoperative.

POSSIBLE CAUSE

•  Fuel injector No.3 connector or terminal malfunction

•  PCM connector or terminal malfunction

•  Open circuit between fuel pump relay and fuel injector No.3 terminal B

•  Open circuit between fuel injector No.3 terminal A and PCM terminal 2BF

•  Fuel injector No.3 malfunction

•  PCM malfunction

DTC P0203	Injector circuit/open—cylinder No.3
DETECTION CONDITION	• The CCM monitors the operation of the fuel injector drivers in the PCM. The test fails if the fuel injector circuitry is inoperative.
POSSIBLE CAUSE	• Fuel injector No.3 connector or terminal malfunction • PCM connector or terminal malfunction • Open circuit between fuel pump relay and fuel injector No.3 terminal B • Open circuit between fuel injector No.3 terminal A and PCM terminal 2BF • Fuel injector No.3 malfunction • PCM malfunction

Diagnostic procedure

STEP	INSPECTION		ACTION
1	VERIFY FREEZE FRAME DATA HAS BEEN RECORDED • Has FREEZE FRAME DATA been recorded?	Yes	Go to the next step.
1		No	Record FREEZE FRAME DATA on the repair order, then go to the next step.
2	VERIFY RELATED SERVICE INFORMATION AVAILABILITY • Verify related Service Information availability. • Is any related Service Information available?	Yes	Perform repair or diagnosis according to the available Service Information. • If the vehicle is not repaired, go to the next step.
2		No	Go to the next step.
3	INSPECT FUEL INJECTOR NO.3 CONNECTOR FOR POOR CONNECTION • Turn the ignition switch off. • Disconnect the fuel injector No.3 connector. • Inspect for poor connection (such as damaged/pulled-out pins, corrosion). • Are there malfunction?	Yes	Repair or replace suspected part, then go to Step 8.
3		No	Go to the next step.
4	INSPECT PCM CONNECTOR FOR POOR CONNECTION • Turn the ignition switch off. • Disconnect the PCM connector. • Inspect for poor connection (such as damaged/pulled-out pins, corrosion). • Is there malfunction?	Yes	Repair or replace suspected part, then go to Step 8.
4		No	Go to the next step.
5	INSPECT FUEL INJECTOR NO.3 POWER SUPPLY CIRCUIT FOR OPEN CIRCUIT • Turn the ignition switch to the ON position (Engine off). • Measure the voltage between fuel injector No.3 connector terminal B and body ground. • Is the voltage B+?	Yes	Go to the next step.
5		No	Repair or replace suspected part, then go to Step 8.
6	INSPECT FUEL INJECTOR NO.3 SIGNAL CIRCUIT FOR OPEN CIRCUIT • Inspect continuity between fuel injector No.3 terminal A (wiring harness-side) and PCM terminal 2BF (wiring harness-side). • Is there continuity?	Yes	Go to the next step.
6		No	Repair or replace suspected part, then go to Step 8.
7	INSPECT FUEL INJECTOR NO.3 • Inspect the fuel injector No.3. (See FUEL INJECTOR INSPECTION [MZI-3.7].) • Is there any malfunction?	Yes	Replace the fuel injector No.3, then go to the next step.
7		No	Go to the next step.
8	VERIFY TROUBLESHOOTING OF DTC P0203 HAS BEEN COMPLETED • Verify that all disconnected connectors reconnected. • Clear DTC from memory using the M-MDS. • Start the engine. • Perform the “KOEO/KOER self-test” (See KOEO/KOER SELF TEST [MZI-3.7].) • Is same DTC present?	Yes	Replace the PCM, then go to the next step.
8		No	Go to the next step.
9	VERIFY AFTER REPAIR PROCEDURE • Perform the “AFTER REPAIR PROCEDURE”. (See AFTER REPAIR PROCEDURE [MZI-3.7].) • Are any DTCs present?	Yes	Go to the applicable DTC inspection. (See DTC TABLE [MZI-3.7].)
9		No	Troubleshooting completed.