DTC Troubleshooting: P2175 (L15B7/L15BA/L15BY)

1.

PGM-FI system check:

PGM-FI system check

?1.	Turn the vehicle to the ON mode.

?2.

Check for Pending or Confirmed DTCs with the HDS.

DTC Description	Confirmed DTC	Pending DTC

Are any Pending or Confirmed DTCs other than P2175 indicated?


	YES

Go to the indicated DTC's troubleshooting.?


	NO

Go to step 2.

2.

Intake air duct visual check:

Intake air duct visual check

?1.	Turn the vehicle to the OFF (LOCK) mode.

?2.	Check for poor connection or blockage at the intake air duct.

Is it OK?


	YES

Go to step 3.


	NO

Reconnect or repair the intake air duct, or replace it if needed.?

3.

Air cleaner housing visual check:

Air cleaner housing visual check

?1.	Check for poor connection or blockage at the air cleaner housing.

Is it OK?


	YES

Go to step 4.


	NO

Replace the air cleaner housing.?

4.

Air cleaner element visual check:

Air cleaner element visual check

?1.	Check for dirt or debris on the air cleaner element.

Is it dirty?


	YES

Replace the air cleaner element.?


	NO

Go to step 5.

5.

Problem verification:

Problem verification

?1.	Turn the vehicle to the ON mode.

?2.

Let the engine cool until the value of ECT SENSOR 1 is 122 °F (50 °C) or less.

Signal	Current conditions
Signal	Values	Unit
ECT SENSOR 1

?3.	Clear the DTC with the HDS.

?4.	Start the engine, and let it idle for 10 seconds or more.

?5.

Monitor the OBD STATUS for DTC P2175 in the DTCs MENU with the HDS.

DTC Description	OBD STATUS
P2175 Throttle Actuator Control System Low Air Flow Detected

Does the HDS indicate FAILED?


	YES

The failure is duplicated. Go to step 6.


	NO

If the HDS indicates PASSED, intermittent failure, the system is OK at this time. Check for poor connections or loose terminals at the throttle body, the MAF sensor/IAT sensor 1, and the PCM. If the on-board snapshot of this DTC is recorded, try to reproduce the failure under the same conditions with the on-board snapshot. If the HDS indicates EXECUTING, keep idling until a result comes on. If the HDS indicates OUT OF CONDITION, go to step 5-2 and recheck.?

6.

Throttle body test:

Throttle body test

?1.	Select the ETCS(TAC) TEST in the INSPECTION MENU with the HDS.

Is the THROTTLE ACTUATOR CONTROL VALVE normal?


	YES

Go to step 7.


	NO

Replace the throttle body.?

7.

Throttle body visual check:

Throttle body visual check

?1.	Turn the vehicle to the OFF (LOCK) mode.

?2.	Disconnect intake air duct F from the throttle body.

?3.	Check for dirt, carbon, or damage in the throttle bore.

Is there dirt, carbon, or damage in the throttle bore?


	YES

If there is dirt or carbon, clean the throttle body. If there is damage in the throttle bore, replace the throttle body.?


	NO

The throttle body is OK. Go to step 8.

8.

MAP sensor performance check 1:

MAP sensor performance check 1

?1.	Turn the vehicle to the ON mode.

?2.

Compare the value of the parameter(s) below with the HDS.

Signal	Current conditions
Signal	Values	Unit
MAP Sensor (Hi Res)
TC Boost Pressure

Is the difference in value between the sensors 26.7 kPa (7.9 inHg, 200 mmHg) or more?


	YES

Replace the MAP sensor.?


	NO

Go to step 9.

9.

MAP sensor performance check 2:

MAP sensor performance check 2

?1.

Note the value of MAP Sensor (Hi Res) in the DATA LIST with the HDS.

Signal	Current conditions
Signal	Values	Unit
MAP Sensor (Hi Res)

?2.	Start the engine, and let it idle.

?3.

Check the MAP Sensor (Hi Res) in the DATA LIST with the HDS.

Signal	Current conditions
Signal	Values	Unit
MAP Sensor (Hi Res)

Does the MAP Sensor (Hi Res) change 0.67 kPa (0.2 inHg, 5 mmHg) or more?


	YES

Go to step 10.


	NO

Replace the MAP sensor.

10.

Turbocharger boost sensor performance check 1:

Turbocharger boost sensor performance check 1

?1.	Turn the vehicle to the OFF (LOCK) mode.

?2.	Turn the vehicle to the ON mode.

?3.

Compare the value of the parameter(s) below with the HDS.

Signal	Current conditions
Signal	Values	Unit
TC BOOST PRESSURE
BARO SENSOR

Is the difference in value between the sensors 26.7 kPa (7.9 inHg, 200 mmHg) or more?


	YES

Replace the turbocharger boost sensor.?


	NO

Go to step 11.

11.

Turbocharger boost sensor performance check 2:

Turbocharger boost sensor performance check 2

?1.

Note the value of TC BOOST PRESSURE in the DATA LIST with the HDS.

Signal	Current conditions
Signal	Values	Unit
TC BOOST PRESSURE

?2.	Start the engine.

?3.	Hold the engine speed at 3,000 rpm without load (CVT in P or N, M/T in neutral) until the radiator fan comes on, then let it idle.

?4.	Hold the engine speed at 4,500 rpm without load.

?5.

Check the parameter below with the HDS.

Signal	Current conditions
Signal	Values	Unit
TC BOOST PRESSURE

Does the value change 0.67 kPa (0.2 inHg, 5 mmHg) or more?


	YES

Go to step 12.


	NO

Replace the turbocharger boost sensor.?

12.

MAF sensor performance check:

MAF sensor performance check

?1.	Hold the engine speed at 3,000 rpm without load (CVT in P or N, M/T in neutral) until the radiator fan comes on, then let it idle.

?2.

While holding the engine speed at 2,500 rpm for 30 seconds, check the parameter(s) below with the HDS.

Signal	Threshold		Current conditions
Signal	Values	Unit	Values	Unit
MAF SENSOR	4.1?5.7	g/s

Do the current condition(s) match the threshold?


	YES

The MAF sensor is OK. Go to step 13.


	NO

Replace MAF sensor/IAT sensor 1.?

13.

IAT sensor 1 performance check:

IAT sensor 1 performance check

?1.	Turn the vehicle to the OFF (LOCK) mode.

?2.	Allow the engine to cool to ambient temperature.

?3.	Note the ambient temperature.

?4.	Turn the vehicle to the ON mode.

?5.

Quickly note the value of the IAT SENSOR (1) in the DATA LIST with the HDS.

Signal	Current conditions
Signal	Values	Unit
IAT SENSOR (1)

?6.	Compare the value of the IAT SENSOR (1) with the ambient temperature.

Does the value of the IAT SENSOR (1) differ 5.4 °F (3 °C) or more from the ambient temperature?


	YES

Replace MAF sensor/IAT sensor 1.?


	NO

IAT sensor 1 is OK. Check for dirt, carbon, or damage in the throttle bore. If there is dirt or carbon, clean the throttle body. If there is damage in the throttle bore, replace the throttle body.?