Troubleshooting Diagnostic Procedure

Intention of troubleshooting procedure

Step 1-2
- Perform inspection of HO2S and A/F sensor signal related parts.
Step 3
- Perform a fuel injector control system inspection.
Step 4
- Perform a purge control system inspection.
Step 5-6
- Perform inspection of fuel line.
Step 7-12
- Perform inspection of each separate part.
Step 13-14
- Verify that the primary malfunction is resolved and there are no other malfunctions.

STEP	INSPECTION	RESULTS	ACTION
1	PURPOSE: INSPECT INSTALLATION OF HO2S Inspect installation of HO2S. Is the HO2S installed securely?	Yes	Go to the next step.
1		No	Retighten the HO2S, then go to Step 13. (See HEATED OXYGEN SENSOR (HO2S) REMOVAL/INSTALLATION [SKYACTIV-G 2.0, SKYACTIV-G 2.5] .)
2	PURPOSE: INSPECT INSTALLATION OF A/F SENSOR Inspect installation of A/F sensor. Is the A/F sensor installed securely?	Yes	Replace the A/F sensor and/or HO2S, then go to Step 13. (See AIR FUEL RATIO (A/F) SENSOR REMOVAL/INSTALLATION [SKYACTIV-G 2.0, SKYACTIV-G 2.5] .) (See HEATED OXYGEN SENSOR (HO2S) REMOVAL/INSTALLATION [SKYACTIV-G 2.0, SKYACTIV-G 2.5] .)
2		No	Retighten the A/F sensor, then go to Step 13. (See AIR FUEL RATIO (A/F) SENSOR REMOVAL/INSTALLATION [SKYACTIV-G 2.0, SKYACTIV-G 2.5] .)
3	PURPOSE: INSPECT FUEL INJECTOR OPERATION In Step 10 of the function inspection using the M-MDS, perform a fail-safe injector operation inspection on the cylinders in which engine speed fluctuation could not be verified. (See ENGINE CONTROL SYSTEM OPERATION INSPECTION [SKYACTIV-G 2.0, SKYACTIV-G 2.5] .) Is there any malfunction?	Yes	Repair or replace the malfunctioning part according to the inspection results, then go to Step 13. (See FUEL INJECTOR REMOVAL/INSTALLATION [SKYACTIV-G 2.0, SKYACTIV-G 2.5] .)
3		No	Go to the next step.
4	PURPOSE: DETERMINE INTEGRITY OF PURGE SOLENOID VALVE Inspect the purge solenoid valve. (See PURGE SOLENOID VALVE INSPECTION [SKYACTIV-G 2.0, SKYACTIV-G 2.5] .) Is there any malfunction?	Yes	Replace the purge solenoid valve, then go to Step 13. (See PURGE SOLENOID VALVE REMOVAL/INSTALLATION [SKYACTIV-G 2.0, SKYACTIV-G 2.5] .)
4		No	Go to the next step.
5	PURPOSE: VERIFY IF MALFUNCTION RELATED TO FUEL LEAK FROM FUEL SYSTEM AFFECTS DIAGNOSTIC RESULTS Visually inspect for leakage from fuel line between fuel distributor and fuel pump. Is there any leakage?	Yes	Repair or replace the malfunctioning part according to the inspection results, then go to Step 13.
5		No	Go to the next step.
6	PURPOSE: INSPECT FUEL LINE (LOW-SIDE) Inspect for leakage or restriction in the fuel line (low-side). Is there any malfunction?	Yes	Repair or replace the malfunctioning part according to the inspection results, then go to Step 13.
6		No	Go to the next step.
7	PURPOSE: INSPECT INSTALLATION OF HO2S Inspect installation of HO2S. Is the HO2S installed securely?	Yes	Go to the next step.
7		No	Retighten the HO2S, then go to Step 13. (See HEATED OXYGEN SENSOR (HO2S) REMOVAL/INSTALLATION [SKYACTIV-G 2.0, SKYACTIV-G 2.5] .)
8	PURPOSE: INSPECT INSTALLATION OF A/F SENSOR Inspect installation of A/F sensor. Is the A/F sensor installed securely?	Yes	Go to the next step.
8		No	Retighten the A/F sensor, then go to Step 13. (See AIR FUEL RATIO (A/F) SENSOR REMOVAL/INSTALLATION [SKYACTIV-G 2.0, SKYACTIV-G 2.5] .)
9	PURPOSE: INSPECT EXHAUST SYSTEM FOR LEAKAGE Verify the exhaust gas leakage from the exhaust system. (between A/F sensor and HO2S) Is there any malfunction?	Yes	Repair or replace the malfunctioning part according to the inspection results, then go to Step 13.
9		No	Go to the next step.
10	PURPOSE: DETERMINE INTEGRITY OF MAP SENSOR Reconnect all disconnected connectors. Inspect the MAP sensor. (See MANIFOLD ABSOLUTE PRESSURE (MAP) SENSOR INSPECTION [SKYACTIV-G 2.0, SKYACTIV-G 2.5] .) Is there any malfunction?	Yes	Replace the MAP sensor/IAT sensor No. 2, then go to Step 13. (See MANIFOLD ABSOLUTE PRESSURE (MAP) SENSOR/INTAKE AIR TEMPERATURE (IAT) SENSOR NO. 2 REMOVAL/INSTALLATION [SKYACTIV-G 2.0, SKYACTIV-G 2.5] .)
10		No	Go to the next step.
11	PURPOSE: DETERMINE INTEGRITY OF MAF SENSOR Inspect the MAF sensor. (See MASS AIR FLOW (MAF) SENSOR INSPECTION [SKYACTIV-G 2.0, SKYACTIV-G 2.5] .) Is there any malfunction?	Yes	Replace the MAF sensor/IAT sensor No. 1, then go to Step 13. (See MASS AIR FLOW (MAF) SENSOR/INTAKE AIR TEMPERATURE (IAT) SENSOR NO. 1 REMOVAL/INSTALLATION [SKYACTIV-G 2.0, SKYACTIV-G 2.5] .)
11		No	Go to the next step.
12	PURPOSE: AIR CLEANER ELEMENT Remove the air cleaner element with the engine is running. (See AIR CLEANER ELEMENT REMOVAL/INSTALLATION [SKYACTIV-G 2.0, SKYACTIV-G 2.5] .) Does the engine speed increase?	Yes	Inspect the air cleaner element. (See AIR CLEANER ELEMENT INSPECTION [SKYACTIV-G 2.0, SKYACTIV-G 2.5] .) If there is any malfunction: Clean or replace the air cleaner element, then go to Step 13. (See AIR CLEANER ELEMENT REMOVAL/INSTALLATION [SKYACTIV-G 2.0, SKYACTIV-G 2.5] .) If there is no malfunction: Go to the next step.
12		No	Go to the next step.
13	PURPOSE: VERIFICATION OF VEHICLE REPAIR COMPLETION Always reconnect all disconnected connectors. Clear the DTC from the PCM memory using the M-MDS. (See CLEARING DTC [SKYACTIV-G 2.0, SKYACTIV-G 2.5] .) Implement the repeatability verification procedure. (See REPEATABILITY VERIFICATION PROCEDURE .) Perform the Pending Trouble Code Access Procedure. (See ON-BOARD DIAGNOSTIC TEST [SKYACTIV-G 2.0, SKYACTIV-G 2.5] .) Is the PENDING CODE/DTC P2096:00 or P2097:00 also present?	Yes	Repeat the inspection from Step 1. If the malfunction recurs, replace the PCM. (See PCM REMOVAL/INSTALLATION [SKYACTIV-G 2.0, SKYACTIV-G 2.5] .) Go to the next step.
13		No	Go to the next step.
14	PURPOSE: VERIFY IF THERE IS ANY OTHER MALFUNCTION Is any other DTC or pending code stored?	Yes	Go to the applicable DTC inspection. (See DTC TABLE [SKYACTIV-G 2.0, SKYACTIV-G 2.5] .)
14		No	DTC troubleshooting completed.