DTC P2237:00 [SKYACTIV-G 1.5, SKYACTIV-G 2.0, SKYACTIV-G 2.5]

id0102h9851200

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 1AG

DETECTION CONDITION

Determination conditions

•  After A/F sensor activation, a condition in which PCM terminal 1AB 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: Value 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

•  Illuminates check engine light.

POSSIBLE CAUSE

•  A/F sensor connector or terminals malfunction

•  PCM connector or terminals malfunction

•  Open circuit in wiring harness between A/F sensor terminal B and PCM terminal 1AG

•  A/F sensor malfunction

•  PCM malfunction

DESCRIPTION	Open circuit between A/F sensor terminal B and PCM terminal 1AG
DETECTION CONDITION	Determination conditions	• After A/F sensor activation, a condition in which PCM terminal 1AB 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: Value 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	• Illuminates check engine light.
POSSIBLE CAUSE	• A/F sensor connector or terminals malfunction • PCM connector or terminals malfunction • Open circuit in wiring harness between A/F sensor terminal B and PCM terminal 1AG • A/F sensor malfunction • PCM malfunction

System Wiring Diagram

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Function Explanation (DTC Detection Outline)

• If a condition in which terminal 1AB 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 1AG 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 (Mode 2)/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 (Mode 2)/snapshot data.

PID Item/Simulation Item Used In Diagnosis

PID/DATA monitor item table

Item	Definition	Unit	Condition/Specification
O2S11	A/F sensor current	µA	• Idle (after warm up): Approx. -39 µA • Deceleration fuel cut (accelerator pedal released from engine speed of 4,000 rpm or more): Approx. 3.84 mA

Function Inspection Using M-MDS

STEP

INSPECTION

RESULTS

ACTION

1

PURPOSE: VERIFY RELATED SERVICE INFORMATION AVAILABILITY

•  Verify related Service Information availability.

•  Is any related Service Information available?

Yes

Perform repair or diagnosis according to the available Service Information.

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

No

Go to the next step.

2

PURPOSE: RECORD VEHICLE STATUS AT TIME OF DTC DETECTION TO UTILIZE WITH REPEATABILITY VERIFICATION

•  Has the FREEZE FRAME DATA (Mode 2)/snapshot data been recorded?

Yes

Go to the troubleshooting procedure to perform the procedure from step 1.

No

Record the FREEZE FRAME DATA (Mode 2)/snapshot data on the repair order.

Note

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

Go to the troubleshooting procedure to perform the procedure from step 1

STEP	INSPECTION	RESULTS	ACTION
1	PURPOSE: VERIFY RELATED SERVICE INFORMATION AVAILABILITY • Verify related Service Information availability. • Is any related Service Information available?	Yes	Perform repair or diagnosis according to the available Service Information. • If the vehicle is not repaired, go to the next step.
No	Go to the next step.
2	PURPOSE: RECORD VEHICLE STATUS AT TIME OF DTC DETECTION TO UTILIZE WITH REPEATABILITY VERIFICATION • Has the FREEZE FRAME DATA (Mode 2)/snapshot data been recorded?	Yes	Go to the troubleshooting procedure to perform the procedure from step 1.
No	Record the FREEZE FRAME DATA (Mode 2)/snapshot data on the repair order. Note • Recording can be facilitated using the screen capture function of the PC. Go to the troubleshooting 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.

• Step 5—6

― Verify that the primary malfunction is resolved and there are no other malfunctions.

STEP

INSPECTION

RESULTS

ACTION

1

PURPOSE: INSPECT A/F SENSOR CONNECTOR CONDITION

•  Switch the ignition off.

•  Disconnect the A/F sensor connector.

•  Inspect for poor connection (such as damaged/pulled-out pins, corrosion).

•  Is there any malfunction?

Yes

Replace the A/F sensor, then go to Step 5.

(See AIR FUEL RATIO (A/F) SENSOR REMOVAL/INSTALLATION [SKYACTIV-G 1.5, SKYACTIV-G 2.0, SKYACTIV-G 2.5].)

No

Go to the next step.

2

PURPOSE: INSPECT PCM CONNECTOR CONDITION

•  Disconnect the PCM connector.

•  Inspect for poor connection (such as damaged/pulled-out pins, corrosion).

•  Is there any malfunction?

Yes

Replace the PCM, then go to Step 5.

(See PCM REMOVAL/INSTALLATION [SKYACTIV-G 1.5, SKYACTIV-G 2.0, SKYACTIV-G 2.5].)

No

Go to the next step.

3

PURPOSE: INSPECT A/F SENSOR CIRCUIT FOR OPEN CIRCUIT

•  Verify that the A/F sensor and PCM connectors are disconnected.

•  Inspect for continuity between A/F sensor terminal B (wiring harness-side) and PCM terminal 1AG (wiring harness-side).

•  Is there continuity?

Yes

Go to the next step.

No

Refer to the wiring diagram and verify whether or not there is a common connector between A/F sensor terminal B and PCM terminal 1AG.

If there is a common connector:

•  Determine the malfunctioning part by inspecting the common connector and the terminal for corrosion, damage, or pin disconnection, and the common wiring harness for an open circuit.

•  Repair or replace the malfunctioning part.

If there is no common connector:

•  Repair or replace the wiring harness which has an open circuit.

Go to Step 5.

4

PURPOSE: DETERMINE INTEGRITY OF A/F SENSOR

•  Start the engine and warm it up completely.

•  Access the O2S11 PID using the M-MDS.
(See ON-BOARD DIAGNOSTIC TEST [SKYACTIV-G 1.5, SKYACTIV-G 2.0, SKYACTIV-G 2.5].)

•  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?

―  O2S11: 0.25 mA or more

Yes

Go to the next step.

No

Replace the A/F sensor, then go to the next step.

(See AIR FUEL RATIO (A/F) SENSOR REMOVAL/INSTALLATION [SKYACTIV-G 1.5, SKYACTIV-G 2.0, SKYACTIV-G 2.5].)

5

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 1.5, SKYACTIV-G 2.0, SKYACTIV-G 2.5].)

•  Perform the KOER self test.
(See KOEO/KOER SELF TEST [SKYACTIV-G 1.5, SKYACTIV-G 2.0, SKYACTIV-G 2.5].)

•  Is the PENDING CODE for this DTC present?

Yes

Repeat the inspection from Step 1.

•  If the malfunction recurs, replace the PCM.
(See PCM REMOVAL/INSTALLATION [SKYACTIV-G 1.5, SKYACTIV-G 2.0, SKYACTIV-G 2.5].)

Go to the next step.

No

Go to the next step.

6

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 1.5, SKYACTIV-G 2.0, SKYACTIV-G 2.5].)

No

DTC troubleshooting completed.

STEP	INSPECTION	RESULTS	ACTION
1	PURPOSE: INSPECT A/F SENSOR CONNECTOR CONDITION • Switch the ignition off. • Disconnect the A/F sensor connector. • Inspect for poor connection (such as damaged/pulled-out pins, corrosion). • Is there any malfunction?	Yes	Replace the A/F sensor, then go to Step 5. (See AIR FUEL RATIO (A/F) SENSOR REMOVAL/INSTALLATION [SKYACTIV-G 1.5, SKYACTIV-G 2.0, SKYACTIV-G 2.5].)
1		No	Go to the next step.
2	PURPOSE: INSPECT PCM CONNECTOR CONDITION • Disconnect the PCM connector. • Inspect for poor connection (such as damaged/pulled-out pins, corrosion). • Is there any malfunction?	Yes	Replace the PCM, then go to Step 5. (See PCM REMOVAL/INSTALLATION [SKYACTIV-G 1.5, SKYACTIV-G 2.0, SKYACTIV-G 2.5].)
2		No	Go to the next step.
3	PURPOSE: INSPECT A/F SENSOR CIRCUIT FOR OPEN CIRCUIT • Verify that the A/F sensor and PCM connectors are disconnected. • Inspect for continuity between A/F sensor terminal B (wiring harness-side) and PCM terminal 1AG (wiring harness-side). • Is there continuity?	Yes	Go to the next step.
3		No	Refer to the wiring diagram and verify whether or not there is a common connector between A/F sensor terminal B and PCM terminal 1AG. If there is a common connector: • Determine the malfunctioning part by inspecting the common connector and the terminal for corrosion, damage, or pin disconnection, and the common wiring harness for an open circuit. • Repair or replace the malfunctioning part. If there is no common connector: • Repair or replace the wiring harness which has an open circuit. Go to Step 5.
4	PURPOSE: DETERMINE INTEGRITY OF A/F SENSOR • Start the engine and warm it up completely. • Access the O2S11 PID using the M-MDS. (See ON-BOARD DIAGNOSTIC TEST [SKYACTIV-G 1.5, SKYACTIV-G 2.0, SKYACTIV-G 2.5].) • 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? ― O2S11: 0.25 mA or more	Yes	Go to the next step.
4		No	Replace the A/F sensor, then go to the next step. (See AIR FUEL RATIO (A/F) SENSOR REMOVAL/INSTALLATION [SKYACTIV-G 1.5, SKYACTIV-G 2.0, SKYACTIV-G 2.5].)
5	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 1.5, SKYACTIV-G 2.0, SKYACTIV-G 2.5].) • Perform the KOER self test. (See KOEO/KOER SELF TEST [SKYACTIV-G 1.5, SKYACTIV-G 2.0, SKYACTIV-G 2.5].) • Is the PENDING CODE for this DTC present?	Yes	Repeat the inspection from Step 1. • If the malfunction recurs, replace the PCM. (See PCM REMOVAL/INSTALLATION [SKYACTIV-G 1.5, SKYACTIV-G 2.0, SKYACTIV-G 2.5].) Go to the next step.
5		No	Go to the next step.
6	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 1.5, SKYACTIV-G 2.0, SKYACTIV-G 2.5].)
6		No	DTC troubleshooting completed.