DTC P0098:00 [PCM (SKYACTIV-G 2.5T)]

id0102s8146500

DTC P0098:00	IAT sensor No.2 circuit high input
DETECTION CONDITION	• If the PCM detects that the IAT sensor No.2 voltage at the PCM terminal 1BN is 4.96 V or more for 5 s, the PCM determines that the IAT sensor No.2 circuit voltage is high. Diagnostic support note • This is a continuous monitor (CCM). • The check engine light illuminates if the PCM detects the above malfunction condition during the first drive cycle. • FREEZE FRAME DATA/Snapshot data is available. • DTC is stored in the PCM memory.
FAIL-SAFE FUNCTION	Not applicable
POSSIBLE CAUSE	• MAP sensor/IAT sensor No.2 connector or terminals malfunction • PCM connector or terminals malfunction • IAT sensor No.2 malfunction • Short to power supply in wiring harness between MAP sensor/IAT sensor No.2 terminal B and PCM terminal 1BN • Open circuit in wiring harness between the following terminals: ? MAP sensor/IAT sensor No.2 terminal B—PCM terminal 1BN ? MAP sensor/IAT sensor No.2 terminal A—PCM terminal 1CJ • PCM malfunction

Diagnostic Procedure

STEP	INSPECTION		ACTION
1	RECORD VEHICLE STATUS AT TIME OF DTC DETECTION TO UTILIZE WITH REPEATABILITY VERIFICATION Note • Recording can be facilitated using the screen capture function of the PC. • Record the FREEZE FRAME DATA/snapshot data on the repair order.	—	Go to the next step.
2	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.
2		No	Go to the next step.
3	INSPECT MAP SENSOR/IAT SENSOR No.2 CONNECTOR CONDITION • Switch the ignition off. • Disconnect the MAP sensor/IAT 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 8.
3		No	Go to the next step.
4	DETERMINE IF MAP SENSOR/IAT SENSOR No.2 OR WIRING HARNESS MALFUNCTION • Verify that the MAP sensor/IAT sensor No.2 connector is disconnected. • Access the IAT2 PID using the M-MDS. (See ON-BOARD DIAGNOSTIC TEST [PCM (SKYACTIV-G 2.5T)].) • Connect a jumper wire between MAP SENSOR/IAT sensor No. 2 terminals A and B (wiring harness-side). • Verify the IAT2 PID value. • Is the voltage 0 V?	Yes	Replace the MAP sensor/IAT sensor No.2, then go to Step 8. (See MANIFOLD ABSOLUTE PRESSURE (MAP) SENSOR/INTAKE AIR TEMPERATURE (IAT) SENSOR NO.2 REMOVAL/INSTALLATION [SKYACTIV-G 2.5T].)
4		No	Go to the next step.
5	INSPECT PCM CONNECTOR CONDITION • Switch the ignition off. • 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 8.
5		No	Go to the next step.
6	INSPECT IAT SENSOR No.2 SIGNAL CIRCUIT FOR SHORT TO POWER SUPPLY • Verify that the MAP sensor/IAT 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 MAP SENSOR/IAT sensor No.2 terminal B (wiring harness-side). • Is the voltage 0 V?	Yes	Go to the next step.
6		No	Refer to the wiring diagram and verify whether or not there is a common connector between MAP sensor/IAT sensor No.2 terminal B and PCM terminal 1BN. 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 8.
7	INSPECT IAT SENSOR No.2 SIGNAL CIRCUIT FOR OPEN CIRCUIT • Verify that the MAP sensor/IAT sensor No.2 and PCM connectors are disconnected. • Switch the ignition off. • Inspect for continuity between the following terminals (wiring harness-side): ? MAP sensor/IAT sensor No.2 terminal A and PCM terminal 1CJ ? MAP sensor/IAT sensor No.2 terminal B and PCM terminal 1BN • Is there continuity?	Yes	Go to the next step.
7		No	Refer to the wiring diagram and verify whether or not there is a common connector between the following terminals: • MAP sensor/IAT sensor No.2 terminal A?PCM terminal 1CJ • MAP sensor/IAT sensor No.2 terminal B?PCM terminal 1BN 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 the next step.
8	VERIFY DTC TROUBLESHOOTING COMPLETED • Always reconnect all disconnected connectors. • Clear the DTC from the PCM memory using the M-MDS. (See CLEARING DTC [PCM (SKYACTIV-G 2.5T)].) • Perform the KOEO or KOER self test. (See KOEO/KOER SELF TEST [PCM (SKYACTIV-G 2.5T)].) • 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 2.5T].) Go to the next step.
8		No	Go to the next step.
9	VERIFY AFTER REPAIR PROCEDURE • Perform the “AFTER REPAIR PROCEDURE”. (See AFTER REPAIR PROCEDURE [PCM (SKYACTIV-G 2.5T)].) • Are any DTCs present?	Yes	Go to the applicable DTC inspection. (See DTC TABLE [PCM (SKYACTIV-G 2.5T)].)
9		No	DTC troubleshooting completed.