Symptom Troubleshooting - Engine - (L3 with TC): Overview Mazda 3 BL

Scheme 24

Scheme 25

Scheme 26

1. When the customer reports a vehicle malfunction, check the malfunction indicator lamp (MIL) indication and diagnostic trouble code (DTC), then diagnose the malfunction according to the following flowchart: If a DTC exists, diagnose the applicable DTC inspection. (See «DTC TABLE [L3 WITH TC]»(/mazda/3/bl-2008-2011/remont/testing-diagnostics/#on-board-diagnostic-engine-controls-l3-with-tc).) If no DTC exists and the MIL does not illuminate or flash, diagnose the applicable symptom troubleshooting. (See «QUICK DIAGNOSTIC CHART [L3 WITH TC]» ).

Main Relay Operation Inspection

1. Verify that the main relay clicks when the ignition switch is turned to ON position and then off. If there is no operation sound, inspect the following: Main relay (See «RELAY INSPECTION».) Wiring harness and connector between ignition switch and main relay terminal A. Wiring harness and connector between PCM terminal 1 AT and main relay terminal B.

Variable Swirl System Operation Inspection

1. Connect the M-MDS to the DLC-2.
2. Access the ECT PID.
3. Verify that the ECT PID is below 60°C {140°F}.
4. Start the engine.
5. Inspect the rod operation under the following conditions

Rod operation

ROD OPERATION SPECIFICATIONS

If the rod operation is not specified, inspect as follows

1. Perform the KOER self-test using the M-MDS and verify that DTCs No. P2004, P2006, P2009 or P2010 are not displayed. If DTC No. P2004, P2006, P2009 or P2010 are displayed, perform DTC inspection. (See «DTC TABLE [L3 WITH TC]»(/mazda/3/bl-2008-2011/remont/testing-diagnostics/#on-board-diagnostic-engine-controls-l3-with-tc) .)

See also:
• DTC TABLE [L3 WITH TC]