DTC P2305:00 [SKYACTIV-G 1.5, SKYACTIV-G 2.0, SKYACTIV-G 2.5]

id0102h9743100

DTC P2305:00

Ion sensor No.2 circuit problem

DETECTION CONDITION

•  After the engine is started, when the engine speed is 2,000 rpm or less, the signal input to the PCM from ion sensor No.2 is in error.

Diagnostic support note

•  This is a continuous monitor (other).

•  The check engine light does not illuminate.

•  FREEZE FRAME DATA (Mode 2) is not available.

•  Snapshot data is available.

•  DTC is stored in the PCM memory.

FAIL-SAFE FUNCTION

Not applicable

POSSIBLE CAUSE

•  Cylinder No.2 misfire

•  Ignition coil/ion sensor No.2 connector or terminals malfunction

•  Short to ground or open circuit in ion sensor No.2 power supply circuit

―  Short to ground in wiring harness between ENGINE2 15 A fuse and ignition coil/ion sensor No.2 terminal A

―  ENGINE2 15 A fuse malfunction

―  Open circuit in wiring harness between main relay terminal D and ignition coil/ion sensor No.2 terminal A

•  Open circuit in wiring harness between ignition coil/ion sensor No.2 terminal D and body ground

•  Short to ground in wiring harness between ignition coil/ion sensor No.2 terminal C and PCM terminal 1BF

•  PCM connector or terminals malfunction

•  Short to power supply in wiring harness between ignition coil/ion sensor No.2 terminal C and PCM terminal 1BF

•  Open circuit in wiring harness between ignition coil/ion sensor No.2 terminal C and PCM terminal 1BF

•  Ion sensor No.2 malfunction

•  PCM malfunction

DTC P2305:00	Ion sensor No.2 circuit problem
DETECTION CONDITION	• After the engine is started, when the engine speed is 2,000 rpm or less, the signal input to the PCM from ion sensor No.2 is in error. Diagnostic support note • This is a continuous monitor (other). • The check engine light does not illuminate. • FREEZE FRAME DATA (Mode 2) is not available. • Snapshot data is available. • DTC is stored in the PCM memory.
FAIL-SAFE FUNCTION	Not applicable
POSSIBLE CAUSE	• Cylinder No.2 misfire • Ignition coil/ion sensor No.2 connector or terminals malfunction • Short to ground or open circuit in ion sensor No.2 power supply circuit ― Short to ground in wiring harness between ENGINE2 15 A fuse and ignition coil/ion sensor No.2 terminal A ― ENGINE2 15 A fuse malfunction ― Open circuit in wiring harness between main relay terminal D and ignition coil/ion sensor No.2 terminal A • Open circuit in wiring harness between ignition coil/ion sensor No.2 terminal D and body ground • Short to ground in wiring harness between ignition coil/ion sensor No.2 terminal C and PCM terminal 1BF • PCM connector or terminals malfunction • Short to power supply in wiring harness between ignition coil/ion sensor No.2 terminal C and PCM terminal 1BF • Open circuit in wiring harness between ignition coil/ion sensor No.2 terminal C and PCM terminal 1BF • Ion sensor No.2 malfunction • PCM malfunction

Diagnostic Procedure

STEP	INSPECTION		ACTION
1	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.
1		No	Go to the next step.
2	VERIFY RELATED PENDING CODE AND/OR DTC • Switch the ignition off, then ON (engine off). • Perform the Pending Trouble Code Access Procedure and DTC Reading Procedure. (See ON-BOARD DIAGNOSTIC TEST [SKYACTIV-G 1.5, SKYACTIV-G 2.0, SKYACTIV-G 2.5].) • Is the PENDING CODE/DTC P0302:00 also present?	Yes	Go to the applicable PENDING CODE or DTC inspection. (See DTC P0301:00, P0302:00, P0303:00, P0304:00 [SKYACTIV-G 1.5, SKYACTIV-G 2.0, SKYACTIV-G 2.5].)
2		No	Go to the next step.
3	INSPECT IGNITION COIL/ION SENSOR NO.2 CONNECTOR CONDITION • Switch the ignition off. • Disconnect the ignition coil/ion sensor No.2 connector. • Inspect for poor connection (such as damaged/pulled-out pins, corrosion). • Is there any malfunction?	Yes	Repair or replace the connector and/or terminals, then go to Step 11.
3		No	Go to the next step.
4	INSPECT ION SENSOR NO.2 POWER SUPPLY CIRCUIT FOR SHORT TO GROUND OR OPEN CIRCUIT • Verify that the ignition coil/ion sensor No.2 connector is disconnected. • Switch the ignition ON (engine off). Note • Another DTC may be stored by the PCM detecting an open circuit. • Measure the voltage at the ignition coil/ion sensor No.2 terminal A (wiring harness-side). • Is the voltage B+?	Yes	Go to the next step.
4		No	Inspect the ENGINE2 15 A fuse. • If the fuse is blown: ― Refer to the wiring diagram and verify whether or not there is a common connector between ENGINE2 15 A fuse and ignition coil/ion sensor No.2 terminal A. 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 a short to ground. • Repair or replace the malfunctioning part. If there is no common connector: • Repair or replace the wiring harness which has a short to ground. • Replace the fuse. • If the fuse is damaged: ― Replace the fuse. • If the fuse is normal: ― Refer to the wiring diagram and verify whether or not there is a common connector between main relay terminal D and ignition coil/ion sensor No.2 terminal A. 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 11.
5	INSPECT ION SENSOR NO.2 GROUND CIRCUIT FOR OPEN CIRCUIT • Verify that the ignition coil/ion sensor No.2 connector is disconnected. • Switch the ignition off. • Inspect for continuity between ignition coil/ion sensor No.2 terminal D (wiring harness-side) and body ground. • Is there continuity?	Yes	Go to the next step.
5		No	Refer to the wiring diagram and verify whether or not there is a common connector between ignition coil/ion sensor No.2 terminal D and body ground. 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: • Inspect for the following: ― Open circuit between ignition coil/ion sensor No.2 and body ground ― Loose or lifting ground point • Repair or replace the malfunctioning part. Go to Step 11.
6	INSPECT ION SENSOR NO.2 SIGNAL CIRCUIT FOR SHORT TO GROUND • Verify that the ignition coil/ion sensor No.2 connector is disconnected. • Inspect for continuity between ignition coil/ion sensor No.2 terminal C (wiring harness-side) and body ground. • Is there continuity?	Yes	If the short to ground circuit could be detected in the wiring harness: • Refer to the wiring diagram and verify whether or not there is a common connector between ignition coil/ion sensor No.2 terminal C and PCM terminal 1BF. 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 a short to ground. ― Repair or replace the malfunctioning part. If there is no common connector: ― Repair or replace the wiring harness which has a short to ground. If the short to ground circuit could not be detected in the wiring harness: • Replace the PCM (short to ground in the PCM internal circuit). (See PCM REMOVAL/INSTALLATION [SKYACTIV-G 1.5, SKYACTIV-G 2.0, SKYACTIV-G 2.5].) Go to Step 11.
6		No	Go to the next step.
7	INSPECT PCM CONNECTOR CONDITION • Disconnect the PCM connector. • Inspect for poor connection (such as damaged/pulled-out pins, corrosion). • Is there any malfunction?	Yes	Repair or replace the connector and/or terminals, then go to Step 11.
7		No	Go to the next step.
8	INSPECT ION SENSOR NO.2 SIGNAL CIRCUIT FOR SHORT TO POWER SUPPLY • Verify that the ignition coil/ion sensor No.2 and PCM connectors are disconnected. • Switch the ignition ON (engine off). Note • Another DTC may be stored by the PCM detecting an open circuit. • Measure the voltage at the ignition coil/ion sensor No.2 terminal C (wiring harness-side). • Is the voltage 0 V?	Yes	Go to the next step.
8		No	Refer to the wiring diagram and verify whether or not there is a common connector between ignition coil/ion sensor No.2 terminal C and PCM terminal 1BF. 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 a short to power supply. • Repair or replace the malfunctioning part. If there is no common connector: • Repair or replace the wiring harness which has a short to power supply. Go to Step 11.
9	INSPECT ION SENSOR NO.2 SIGNAL CIRCUIT FOR OPEN CIRCUIT • Verify that the ignition coil/ion sensor No.2 and PCM connectors are disconnected. • Switch the ignition off. • Inspect for continuity between ignition coil/ion sensor No.2 terminal C (wiring harness-side) and PCM terminal 1BF (wiring harness-side). • Is there continuity?	Yes	Go to the next step.
9		No	Refer to the wiring diagram and verify whether or not there is a common connector between ignition coil/ion sensor No.2 terminal C and PCM terminal 1BF. 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 11.
10	INSPECT ION SENSOR NO.2 • Inspect the ion sensor No.2. (See ION SENSOR INSPECTION [SKYACTIV-G 1.5, SKYACTIV-G 2.0, SKYACTIV-G 2.5].) • Is there any malfunction?	Yes	Replace the ignition coil/ion sensor No.2, then go to the next step. (See IGNITION COIL/ION SENSOR REMOVAL/INSTALLATION [SKYACTIV-G 1.5, SKYACTIV-G 2.0, SKYACTIV-G 2.5].)
10		No	Go to the next step.
11	VERIFY DTC TROUBLESHOOTING COMPLETED • Always reconnect all disconnected connectors. • Clear the DTC from the PCM memory using the M-MDS. (See AFTER REPAIR PROCEDURE [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 same 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.
11		No	Go to the next step.
12	VERIFY AFTER REPAIR PROCEDURE • Perform the “AFTER REPAIR PROCEDURE”. (See AFTER REPAIR PROCEDURE [SKYACTIV-G 1.5, SKYACTIV-G 2.0, SKYACTIV-G 2.5].) • Are any DTCs present?	Yes	Go to the applicable DTC inspection. (See DTC TABLE [SKYACTIV-G 1.5, SKYACTIV-G 2.0, SKYACTIV-G 2.5].)
12		No	DTC troubleshooting completed.