Intention of troubleshooting procedure

Step 1
- Perform an inspection of the connectors and wiring harnesses between the A/F sensor and PCM.
Step 2
- Perform a unit inspection of the A/F sensor.
Repair completion verification
- Verify that the primary malfunction is resolved and there are no other malfunctions.

P2237-00: (PCM - SKYACTIV-G) TROUBLESHOOTING DIAGNOSTIC PROCEDURE

Step	Inspection	Results	Action
1	PURPOSE: INSPECT WIRING HARNESS (INCLUDING CONNECTOR/TERMINAL) BETWEEN A/F SENSOR AND PCM FOR MALFUNCTION Inspect the applicable circuit. (See CIRCUIT INSPECTION .) (See CONNECTOR INSPECTION .) Is the circuit normal?	Yes	Go to the next step.
1		No	Repair or replace the malfunctioning location and perform repair completion verification 1.
2	PURPOSE: DETERMINE INTEGRITY OF A/F SENSOR Start the engine and warm it up. Using the M-MDS, display the PCM PID [A/F_SEN_CUR]. (See PID/DATA MONITOR INSPECTION .) Drive the vehicle under the following conditions. WARNING: To prevent an accident, work with another person when the vehicle is being driven (one person drives vehicle, other person operates M-MDS) . Observe legal speed limits when driving the vehicle and perform the procedure in a location where safety can be ensured. After increasing the engine speed to 3, 000 rpm, decelerate using engine braking. Is the displayed PID value as follows? A/F_SEN_CUR: 0.25 mA or more	Yes	Go to the next step.
2		No	Replace the A/F sensor and perform repair completion verification 1. (Refer to AIR FUEL RATIO (A/F) SENSOR REMOVAL/INSTALLATION [SKYACTIV-G (WITH CYLINDER DEACTIVATION)] in service information.)
Repair completion verification 1	PURPOSE: VERIFY IF 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 DTC displayed?	Yes	Refer to the CAN (controller area network) malfunction diagnosis flow to inspect for a CAN communication error. (See MALFUNCTION DIAGNOSIS FLOW [CONTROLLER AREA NETWORK (CAN)] .) If the CAN communication is normal, perform the diagnosis from Step 1 again. If the malfunction is not resolved, replace the PCM, then go to the next step. (Refer to PCM REMOVAL/INSTALLATION [SKYACTIV-G (WITH CYLINDER DEACTIVATION)] in service information.)
Repair completion verification 1		No	Go to the next step.
Repair completion verification 2	PURPOSE: VERIFY IF OTHER DTCs OCCURRED SIMULTANOUSLY Perform the DTC inspection. (See DTC INSPECTION .) Are other DTCs displayed?	Yes	Go to the applicable DTC inspection.
Repair completion verification 2		No	DTC troubleshooting completed.