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Check reference values between ECM terminals and ground under the following conditions: ECM TERMINAL NO. ITEM CONDITION DATA (AVERAGE DC VOLTAGE 6 Injector 2 • Engine is running • Warm-up condition • Idle • Accelerate suddenly Voltage: 11 - 14 V 7 Injector 3 27 Injector 1 47 Injector 4 On Board Diagnostic Logic DTC NO. DTC DEFINITION DTC DETECTION CONDITION POSSIBLE CAUSE P0261 Cylinder 1 - Injector Circuit Low Engine is running • Injector • Harness or connectors • ECM P0264 Cylinder 2 - Injector Circuit Low P0267 Cylinder 3 - Injector Circuit Low P0270 Cylinder 4 - Injector Circuit Low DTC Confirmation Procedure: Before performing the following procedure, confirm that battery voltage is more than 12 V. • Turn ignition switch off. • Connect the X-431 scan tool to the Data Link Connector (DLC) - use the most current software available. • Turn ignition switch on. • With the scan tool, record and erase stored DTCs in the ECM. • Start engine and warm it to normal operating temperature then select view DTC. • If DTC is detected, go to Diagnostic Procedure - Step 1. • If the DTC is not detected, the DTC condition is intermittent (See Diagnosis & Testing Diagnostic Help in Sec- tion 03 Electronic Engine Controls). NOTE : Diagnostic Procedure 1. CHECK GROUND CONNECTIONS • Turn ignition switch off. • Loosen and retighten ground screws on the body (See Ground Inspection in Section 03 Electronic Engine Con- trols). • Inspect ground connections E-207 and E-208 mounting position (See Vehicle Wiring Harness Layout - Engine Room Harness (With 2.0L Engine) in Section 16 Wiring). Are the ground connections OK? Yes >> Go to the next step. No >> Repair or replace ground harness or connections. DIAGNOSIS & TESTING 03
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