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.
Repair completion verification
- Verify that the primary malfunction is resolved and there are no other malfunctions.

TROUBLESHOOTING DIAGNOSTIC PROCEDURE

Step	Inspection	Results	Action
1	PURPOSE: VERIFY IF HO2S IS INSTALLED CORRECTLY Verify the HO2S installation condition. (See HEATED OXYGEN SENSOR (HO2S) REMOVAL/INSTALLATION [(VIN M) (US)] .) (See HEATED OXYGEN SENSOR (HO2S) REMOVAL/INSTALLATION [(VIN 7 & VIN L) (US)] .) Is the installation condition normal?	Yes	Go to the next step.
1		No	Correctly install the HO2S and perform the repair completion verification. (See HEATED OXYGEN SENSOR (HO2S) REMOVAL/INSTALLATION [(VIN M) (US)] .) (See HEATED OXYGEN SENSOR (HO2S) REMOVAL/INSTALLATION [(VIN 7 & VIN L) (US)] .)
2	PURPOSE: VERIFY IF A/F SENSOR IS INSTALLED CORRECTLY Verify the A/F sensor installation condition. (See AIR FUEL RATIO (A/F) SENSOR REMOVAL/INSTALLATION [(VIN M) (US)] .) (See AIR FUEL RATIO (A/F) SENSOR REMOVAL/INSTALLATION [(VIN 7 & VIN L) (US)] .) Is the installation condition normal?	Yes	Replace the A/F sensor and/or HO2S and perform the repair completion verification. (See AIR FUEL RATIO (A/F) SENSOR REMOVAL/INSTALLATION [(VIN M) (US)] .) (See AIR FUEL RATIO (A/F) SENSOR REMOVAL/INSTALLATION [(VIN 7 & VIN L) (US)] .) (See HEATED OXYGEN SENSOR (HO2S) REMOVAL/INSTALLATION [(VIN M) (US)] .) (See HEATED OXYGEN SENSOR (HO2S) REMOVAL/INSTALLATION [(VIN 7 & VIN L) (US)] .)
2		No	Correctly install the A/F sensor and perform the repair completion verification. (See AIR FUEL RATIO (A/F) SENSOR REMOVAL/INSTALLATION [(VIN M) (US)] .) (See AIR FUEL RATIO (A/F) SENSOR REMOVAL/INSTALLATION [(VIN 7 & VIN L) (US)] .)
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 FUEL INJECTOR INSPECTION [(VIN M) (US)] .) (See FUEL INJECTOR INSPECTION [(VIN 7 & VIN L) (US)] .) Is there any malfunction?	Yes	Repair or replace the malfunctioning location and perform the repair completion verification. (See FUEL INJECTOR REMOVAL/INSTALLATION [(VIN M) (US)] .) (See FUEL INJECTOR REMOVAL/INSTALLATION [(VIN 7 & VIN L) (US)] .)
3		No	Go to the next step.
4	PURPOSE: INSPECT PURGE SOLENOID VALVE FOR MALFUNCTION Inspect the applicable part. (See PURGE SOLENOID VALVE INSPECTION [(VIN M) (US)] .) (See PURGE SOLENOID VALVE INSPECTION [(VIN 7 & VIN L) (US)] .) Is the part normal?	Yes	Go to the next step.
4		No	Repair or replace the malfunctioning location and perform the repair completion verification. (See PURGE SOLENOID VALVE REMOVAL/INSTALLATION [(VIN M) (US)] .) (See PURGE SOLENOID VALVE REMOVAL/INSTALLATION [(VIN 7 & VIN L) (US)] .)
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 location and perform the repair completion verification.
5		No	Go to the next step.
6	PURPOSE: INSPECT FUEL LINE (LOWSIDE) Inspect for leakage or restriction in the fuel line (low-side). Is there any malfunction?	Yes	Repair or replace the malfunctioning location and perform the repair completion verification.
6		No	Go to the next step.
7	PURPOSE: VERIFY IF HO2S IS INSTALLED CORRECTLY Verify the HO2S installation condition. (See HEATED OXYGEN SENSOR (HO2S) REMOVAL/INSTALLATION [(VIN M) (US)] .) (See HEATED OXYGEN SENSOR (HO2S) REMOVAL/INSTALLATION [(VIN 7 & VIN L) (US)] .) Is the installation condition normal?	Yes	Go to the next step.
7		No	Correctly install the HO2S and perform the repair completion verification. (See HEATED OXYGEN SENSOR (HO2S) REMOVAL/INSTALLATION [(VIN M) (US)] .) (See HEATED OXYGEN SENSOR (HO2S) REMOVAL/INSTALLATION [(VIN 7 & VIN L) (US)] .)
8	PURPOSE: VERIFY IF A/F SENSOR IS INSTALLED CORRECTLY Verify the A/F sensor installation condition. (See AIR FUEL RATIO (A/F) SENSOR REMOVAL/INSTALLATION [(VIN M) (US)] .) (See AIR FUEL RATIO (A/F) SENSOR REMOVAL/INSTALLATION [(VIN 7 & VIN L) (US)] .) Is the installation condition normal?	Yes	Go to the next step.
8		No	Correctly install the A/F sensor and perform the repair completion verification. (See AIR FUEL RATIO (A/F) SENSOR REMOVAL/INSTALLATION [(VIN M) (US)] .) (See AIR FUEL RATIO (A/F) SENSOR REMOVAL/INSTALLATION [(VIN 7 & VIN L) (US)] .)
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 location and perform the repair completion verification.
9		No	Go to the next step.
10	PURPOSE: INSPECT MAP SENSOR FOR MALFUNCTION Inspect the applicable part. (See MANIFOLD ABSOLUTE PRESSURE (MAP) SENSOR INSPECTION [(VIN M) (US)] .) (See MANIFOLD ABSOLUTE PRESSURE (MAP) SENSOR INSPECTION [(VIN 7 & VIN L) (US)] .) Is the part normal?	Yes	Go to the next step.
10		No	Repair or replace the malfunctioning location and perform the repair completion verification. (See MANIFOLD ABSOLUTE PRESSURE (MAP) SENSOR/INTAKE AIR TEMPERATURE (IAT) SENSOR NO. 2 REMOVAL/INSTALLATION [(VIN M) (US)] .) (See MANIFOLD ABSOLUTE PRESSURE (MAP) SENSOR/INTAKE AIR TEMPERATURE (IAT) SENSOR NO. 2 REMOVAL/INSTALLATION [(VIN 7 & VIN L) (US)] .)
11	PURPOSE: INSPECT MAF SENSOR FOR MALFUNCTION Inspect the applicable part. (See MASS AIR FLOW (MAF) SENSOR INSPECTION [(VIN M) (US)] .) (See MASS AIR FLOW (MAF) SENSOR INSPECTION [(VIN 7 & VIN L) (US)] .) Is the part normal?	Yes	Go to the next step.
11		No	Repair or replace the malfunctioning location and perform the repair completion verification. (See MASS AIR FLOW (MAF) SENSOR/INTAKE AIR TEMPERATURE (IAT) SENSOR NO. 1 REMOVAL/INSTALLATION [(VIN M) (US)] .) (See MASS AIR FLOW (MAF) SENSOR/INTAKE AIR TEMPERATURE (IAT) SENSOR NO. 1 REMOVAL/INSTALLATION [(VIN 7 & VIN L) (US)] .)
12	PURPOSE: INSPECT AIR CLEANER ELEMENT FOR MALFUNCTION Remove the air cleaner element with the engine is running. (See AIR CLEANER ELEMENT REMOVAL/INSTALLATION [(VIN M) (US)] .) (See AIR CLEANER ELEMENT REMOVAL/INSTALLATION [(VIN 7 & VIN L) (US)] .) Does the engine speed increase?	Yes	Inspect the air cleaner element. (See AIR CLEANER ELEMENT INSPECTION [(VIN M) (US)] .) (See AIR CLEANER ELEMENT INSPECTION [(VIN 7 & VIN L) (US)] .) If there is any malfunction: Clean or replace the air cleaner element and perform the repair completion verification. (See AIR CLEANER ELEMENT REMOVAL/INSTALLATION [(VIN M) (US)] .) (See AIR CLEANER ELEMENT REMOVAL/INSTALLATION [(VIN 7 & VIN L) (US)] .) If there is no malfunction: Go to repair completion verification.
12		No	Go to the next step.
Repair completion verification 1	PURPOSE: VERIFY THAT VEHICLE IS REPAIRED Install/connect the part removed/disconnected during the troubleshooting procedure. Clear the DTC recorded in the memory. (See CLEARING DTC .) Replicate the vehicle conditions at the time the DTC was detected using the following procedure. Implement the repeatability verification procedure. (See REPEATABILITY VERIFICATION PROCEDURE .) Perform the DTC inspection for the PCM. (See DTC INSPECTION .) Is the same Pending DTC present?	Yes	Refer to the controller area network (CAN) malfunction diagnosis flow to inspect for a CAN communication error. (See CONTROLLER AREA NETWORK (CAN) MALFUNCTION DIAGNOSIS FLOW (US) .) If the CAN communication is normal, perform the diagnosis from Step 1. If the malfunction recurs, replace the PCM, then go to the next step. (See PCM REMOVAL/INSTALLATION [(VIN M) (US)] .) (See PCM REMOVAL/INSTALLATION [(VIN 7 & VIN L) (US)] .)
Repair completion verification 1		No	Go to the next step.
Repair completion verification 2	PURPOSE: VERIFY IF OTHER DTCs DISPLAYED Perform the DTC inspection. (See DTC INSPECTION .) Are any other DTCs displayed?	Yes	Repair the malfunctioning location according to the applicable DTC troubleshooting.
Repair completion verification 2		No	DTC troubleshooting completed.