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DTC P2237:00 [PCM (SKYACTIV-G (E))]

id0102t48512u1

Note

• To determine the malfunctioning part, proceed with the diagnostics from "Function Inspection Using M-MDS".

Details On DTCs

Description

Open circuit between A/F sensor terminal B and PCM terminal 1M

Detection condition

Determination conditions

•  After A/F sensor activation, a condition in which PCM terminal 1S voltage is within the specified range continues for 5 s or more.

Preconditions

•  Battery voltage: 11—18 V^*1

•  The following DTC is not detected:

―  Internal PCM malfunction: P064D:00

^*1: Standard can be verified by displaying PIDs using M-MDS

Drive cycle

•  2

Self test type

•  CMDTC self test, KOER self test

Sensor used

•  A/F sensor

Fail-safe function

•  Fixes duty value of A/F sensor heater

•  Stops fuel feedback control of A/F sensor

Vehicle status when DTCs are output

•  Not applicable

Possible cause

•  A/F sensor connector or terminals malfunction

•  PCM connector or terminals malfunction

•  Open circuit in A/F sensor control circuit

•  A/F sensor malfunction

•  PCM malfunction

Description	Open circuit between A/F sensor terminal B and PCM terminal 1M
Detection condition	Determination conditions	• After A/F sensor activation, a condition in which PCM terminal 1S voltage is within the specified range continues for 5 s or more.
Preconditions	• Battery voltage: 11—18 V^1 • The following DTC is not detected: ― Internal PCM malfunction: P064D:00 ^1: Standard can be verified by displaying PIDs using M-MDS
Drive cycle	• 2
Self test type	• CMDTC self test, KOER self test
Sensor used	• A/F sensor
Fail-safe function	• Fixes duty value of A/F sensor heater • Stops fuel feedback control of A/F sensor
Vehicle status when DTCs are output	• Not applicable
Possible cause	• A/F sensor connector or terminals malfunction • PCM connector or terminals malfunction • Open circuit in A/F sensor control circuit • A/F sensor malfunction • PCM malfunction

Function Explanation (DTC Detection Outline)

• If a condition in which terminal 1S remains within the specified range for 5 s or more, the PCM determines an open circuit between A/F sensor terminal B and PCM terminal 1M and stores a DTC.

Repeatability Verification Procedure

1. Warm up the engine to allow the engine coolant temperature to reach 80 °C {176 °F} or more.

2. Start the engine and leave it idling for 1 min.

3. Shift to 2nd gear and drive the vehicle for 1 min at a speed of 50 km/h {31 mph} or more.

Note

• Match the engine coolant temperature in the recorded freeze frame data/snapshot data, the vehicle speed, and engine speed values to the best extent possible while driving the vehicle.

4. Try to reproduce the malfunction by driving the vehicle for 5 min based on the values in the freeze frame data/snapshot data.

PID Item/Simulation Item Used In Diagnosis

PID/DATA monitor item table

PIDs	Reference
A/F_SEN_CUR	(See PID/DATA MONITOR TABLE [PCM (SKYACTIV-G (E))].)

Function Inspection Using M-MDS

Step

Inspection

Results

Action

1

PURPOSE: VERIFY RELATED REPAIR INFORMATION OR SERVICE INFORMATION AVAILABILITY

•  Verify related Service Bulletins, on-line repair information, or Service Information availability.

•  Is any related Information available?

Yes

Perform repair or diagnosis according to the available information.

•  If the vehicle is not repaired, go to the next step.

No

Go to the next step.

2

PURPOSE: RECORD VEHICLE STATUS WHEN DTC WAS DETECTED TO UTILIZE WITH REPEATABILITY VERIFICATION

•  Record the freeze frame data/snapshot data.

Note

•  Recording can be facilitated using the screen capture function of the PC.

—

Go to Troubleshooting Diagnostic Procedure to perform the procedure from Step 1.

Step	Inspection	Results	Action
1	PURPOSE: VERIFY RELATED REPAIR INFORMATION OR SERVICE INFORMATION AVAILABILITY • Verify related Service Bulletins, on-line repair information, or Service Information availability. • Is any related Information available?	Yes	Perform repair or diagnosis according to the available information. • If the vehicle is not repaired, go to the next step.
No	Go to the next step.
2	PURPOSE: RECORD VEHICLE STATUS WHEN DTC WAS DETECTED TO UTILIZE WITH REPEATABILITY VERIFICATION • Record the freeze frame data/snapshot data. Note • Recording can be facilitated using the screen capture function of the PC.	—	Go to Troubleshooting Diagnostic Procedure to perform the procedure from Step 1.

Troubleshooting Diagnostic Procedure

Intention of troubleshooting procedure

• Step 1—3

― Perform an inspection of the A/F sensor and PCM-related connectors and wiring harnesses.

• Step 4

― 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.

Step

Inspection

Results

Action

1

PURPOSE: INSPECT A/F SENSOR CONNECTOR FOR MALFUNCTION

•  Inspect the applicable connector and terminal.
(See CONNECTOR INSPECTION.)

•  Are the connector and terminal normal?

Yes

Go to the next step.

No

Repair or replace the malfunctioning location and perform the repair completion verification.

2

PURPOSE: INSPECT PCM CONNECTOR FOR MALFUNCTION

•  Inspect the applicable connector and terminal.
(See CONNECTOR INSPECTION.)

•  Are the connector and terminal normal?

Yes

Go to the next step.

No

Repair or replace the malfunctioning location and perform the repair completion verification.

3

PURPOSE: INSPECT A/F SENSOR CONTROL CIRCUIT FOR OPEN CIRCUIT

•  Inspect the applicable circuit for open circuit.
(See CIRCUIT INSPECTION.)

•  Is the circuit normal?

Yes

Go to the next step.

No

Repair or replace the malfunctioning location and perform the repair completion verification.

4

PURPOSE: DETERMINE INTEGRITY OF A/F SENSOR

•  Start the engine and warm it up completely.

•  Access the A/F_SEN_CUR PID using the M-MDS.
(See PID/DATA MONITOR INSPECTION.)

•  Drive the vehicle under the following conditions.

Warning

•  When the M-MDS is used to observe monitor system status while driving, be sure to have another technician with you, or record the data in the M-MDS using the PID/DATA MONITOR AND RECORD capturing function and inspect later.

•  While performing this step, always operate the vehicle in a safe and lawful manner.

―  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.

No

Replace the A/F sensor and perform the repair completion verification.

(See AIR FUEL RATIO (A/F) SENSOR REMOVAL/INSTALLATION [SKYACTIV-G (WITH CYLINDER DEACTIVATION (E))].)

(See AIR FUEL RATIO (A/F) SENSOR REMOVAL/INSTALLATION [SKYACTIV-G (WITHOUT CYLINDER DEACTIVATION (E))].)

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.

―  Perform the KOER self test.
(See DTC INSPECTION.)

•  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 [(E)].)

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 [SKYACTIV-G (WITH CYLINDER DEACTIVATION (E))].)

(See PCM REMOVAL/INSTALLATION [SKYACTIV-G (WITHOUT CYLINDER DEACTIVATION (E))].)

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.

No

DTC troubleshooting completed.

Step	Inspection	Results	Action
1	PURPOSE: INSPECT A/F SENSOR CONNECTOR FOR MALFUNCTION • Inspect the applicable connector and terminal. (See CONNECTOR INSPECTION.) • Are the connector and terminal normal?	Yes	Go to the next step.
1		No	Repair or replace the malfunctioning location and perform the repair completion verification.
2	PURPOSE: INSPECT PCM CONNECTOR FOR MALFUNCTION • Inspect the applicable connector and terminal. (See CONNECTOR INSPECTION.) • Are the connector and terminal normal?	Yes	Go to the next step.
2		No	Repair or replace the malfunctioning location and perform the repair completion verification.
3	PURPOSE: INSPECT A/F SENSOR CONTROL CIRCUIT FOR OPEN CIRCUIT • Inspect the applicable circuit for open circuit. (See CIRCUIT INSPECTION.) • Is the circuit normal?	Yes	Go to the next step.
3		No	Repair or replace the malfunctioning location and perform the repair completion verification.
4	PURPOSE: DETERMINE INTEGRITY OF A/F SENSOR • Start the engine and warm it up completely. • Access the A/F_SEN_CUR PID using the M-MDS. (See PID/DATA MONITOR INSPECTION.) • Drive the vehicle under the following conditions. Warning • When the M-MDS is used to observe monitor system status while driving, be sure to have another technician with you, or record the data in the M-MDS using the PID/DATA MONITOR AND RECORD capturing function and inspect later. • While performing this step, always operate the vehicle in a safe and lawful manner. ― 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.
4		No	Replace the A/F sensor and perform the repair completion verification. (See AIR FUEL RATIO (A/F) SENSOR REMOVAL/INSTALLATION [SKYACTIV-G (WITH CYLINDER DEACTIVATION (E))].) (See AIR FUEL RATIO (A/F) SENSOR REMOVAL/INSTALLATION [SKYACTIV-G (WITHOUT CYLINDER DEACTIVATION (E))].)
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. ― Perform the KOER self test. (See DTC INSPECTION.) • 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 [(E)].) 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 [SKYACTIV-G (WITH CYLINDER DEACTIVATION (E))].) (See PCM REMOVAL/INSTALLATION [SKYACTIV-G (WITHOUT CYLINDER DEACTIVATION (E))].)
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.