Acura CSX. Instruction — page 115

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DTC P0369:

11-134

11-134

PGM-FI System

16. Turn the ignition switch to LOCK (0).

17. Replace CMP sensor B (see page 11-222).

18. Reconnect all connectors.

19. Turn the ignition switch to ON (II).

20. Reset the ECM/PCM with the HDS.

21. Do the ECM/PCM idle learn procedure (see page

11-310).

22. Check for Temporary DTCs or DTCs with the HDS.

Check for poor connections or loose

terminals at CMP sensor B and the ECM/PCM, then
go to step 1.

Troubleshooting is complete. If any other

Temporary DTCs or DTCs are indicated, go to the
indicated DTC’s troubleshooting.

23. Reconnect all connectors.

24. Update the ECM/PCM if it does not have the latest

software (see page 11-227), or substitute a known-
good ECM/PCM (see page 11-7).

25. Check for Temporary DTCs or DTCs with the HDS.

Check for poor connections or loose

terminals at CMP sensor B and the ECM/PCM. If the
ECM/PCM was updated, substitute a known-good
ECM/PCM (see page 11-7), then recheck. If the
ECM/PCM was substituted, go to step 1.

If the ECM/PCM was updated, troubleshooting

is complete. If the ECM/PCM was substituted,
replace the original ECM/PCM (see page 11-228). If
any other Temporary DTCs or DTCs are indicated,
go to the indicated DTC’s troubleshooting.

NOTE: Before you troubleshoot, record all freeze data
and any on-board snapshot, and review the general
troubleshooting information (see page 11-3).

1. Turn the ignition switch to ON (II).

2. Clear the DTC with the HDS.

3. Start the engine, and let it idle for 10 seconds.

4. Check the CMP B NOISE in the DATA LIST with the

HDS.

Go to step 7.

Go to step 5.

5. Test-drive the vehicle for several minutes in the

range of these recorded freeze data parameters:

• ENGINE SPEED
• VSS

6. Check the CMP B NOISE in the DATA LIST with the

HDS.

Go to step 7.

Intermittent failure, the system is OK at this

time. Check for poor connections or loose terminals
at CMP sensor B and the ECM/PCM.

7. Check for poor connections or loose terminals at

these locations:

• CMP sensor B
• ECM/PCM
• Engine ground
• Body ground

Go to step 8.

Repair or replace the connections or the

terminals, then go to step 11.

CMP Sensor B Circuit Intermittent

Interruption

Is DT C P0365 indicated?

Is DT C P0365 indicated?

Ar e 0 counts indicated?

Ar e 0 counts indicated?

Ar e the connections and ter minals OK ?

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DTC P050A:

11-135

11-135

8. Check for damage on the CMP sensor B pulser

plate (see page 6-41).

Replace the CMP sensor B pulser plate

(see page 6-41), then go to step 11.

Go to step 9.

9. Turn the ignition switch to LOCK (0).

10. Replace CMP sensor B (see page 11-222).

11. Turn the ignition switch to ON (II).

12. Reset the ECM/PCM with the HDS.

13. Do the ECM/PCM idle learn procedure (see page

11-310).

14. Start the engine, and let it idle for 10 seconds.

15. Check for Temporary DTCs or DTCs with the HDS.

Check for poor connections or loose

terminals at CMP sensor B and the ECM/PCM, then
go to step 1.

Troubleshooting is complete. If any other

Temporary DTCs or DTCs are indicated, go to the
indicated DTC’s troubleshooting.

NOTE: Before you troubleshoot, record all freeze data
and any on-board snapshot, and review the general
troubleshooting information (see page 11-3).

1. Turn the ignition switch to ON (II).

2. Check for Temporary DTCs or DTCs with the HDS.

Go to the indicated DTC’s troubleshooting.

Go to step 3.

3. Check for poor connections or a blockage at the

intake air duct.

Go to step 4.

Reconnect or repair the intake air duct, then

go to step 20.

4. Check for damage to the air cleaner housing.

Go to step 5.

Replace the air cleaner housing (see page

11-345), then go to step 20.

5. Check for dirt or debris in the air cleaner element.

Replace the air cleaner element or remove

debris (see page 11-346), then go to step 20.

Go to step 6.

Cold Start Idle Air Control

System Performance Problem

Is the pulser plate damaged?

Is DT C P0369 indicated?

Ar e any T empor ar y DT Cs or DT Cs other than
P050A indicated?

Is it OK ?

Is it OK ?

Is it dir ty?

08/08/21 14:18:56 61SNR030_110_0135

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11-136

PGM-FI System

6. Let the engine cool until the value of ECT SENSOR

1 is 50 °C (122 °F) or less.

7. Clear the DTC with the HDS.

8. Start the engine, and let it idle for 10 seconds or

more.

9. Monitor the OBD STATUS for DTC P050A in the

DTCs MENU with the HDS.

Go to step 10.

If the screen 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, and the ECM/
PCM. If the screen indicates EXECUTING, keep
idling until a result comes on. If the screen
indicates OUT OF CONDITION, go to step 6.

10. Do the ETCS TEST in the INSPECTION MENU with

the HDS.

Go to step 11.

Replace the throttle body; K20Z2 engine

(see page 11-348), K20Z3 engine (see page 11-349),
then go to step 20.

11. Start the engine. Hold the engine speed at

3,000 rpm without load (A/T in P or N, M/T in
neutral) until the radiator fan comes on, then let it
idle.

12. Monitor the ENGINE SPEED in the DATA LIST with

the HDS, and hold the engine speed at 2,500 rpm
for at least 30 seconds.

13. While holding the engine speed at 2,500 rpm, check

the MAF SENSOR in the DATA LIST with the HDS.

Go to step 14.

Replace the MAF sensor/IAT sensor (see page

11-224), then go to step 20.

14. Turn the ignition switch to LOCK (0).

15. Allow the engine to cool to ambient temperature.

16. Note the ambient temperature.

17. Turn the ignition switch to ON (II).

18. Note the value of IAT SENSOR quickly in the DATA

LIST with the HDS.

19. Compare the value of the IAT SENSOR and the

ambient temperature.

Replace the MAF sensor/IAT sensor

(see page 11-224), then go to step 20.

Check for dirt, carbon, or damage in the

throttle bore. If there is dirt or carbon, clean the
throttle body (see page 11-344), then go to step 20.
If there is damage in the throttle bore, replace the
throttle body; K20Z2 engine (see page 11-348),
K20Z3 engine (see page 11-349), then go to step 20.

Does the scr een indicate F AILED?

Is the T HROT T LE ACT UAT OR CONT ROL
V ALV E nor mal?

Is ther e about 6.0

8.6 ( K 20Z 2 engine) or

5.7

8.3 ( K 20Z 3 engine) gm/ s?

Does the value of the IAT SENSOR dif f er 3 °C
( 5.4 °F ) or mor e f r om the ambient temper atur e?

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DTC P050B:

11-137

11-137

20. Turn the ignition switch to ON (II).

21. Reset the ECM/PCM with the HDS.

22. Do the ECM/PCM idle learn procedure (see page

11-310).

23. Let the engine cool until the value of ECT SENSOR

1 is 50 °C (122 °F) or less.

24. Start the engine, and let it idle for 10 seconds or

more.

25. Check for Temporary DTCs or DTCs with the HDS.

Check for poor connections or loose

terminals at the throttle body, the MAF sensor/IAT
sensor, and the ECM/PCM, then go to step 1.

Go to step 26.

26. Monitor the OBD STATUS for DTC P050A in the

DTCs MENU with the HDS.

Troubleshooting is complete. If any other

Temporary DTCs or DTCs were indicated in step 25,
go to the indicated DTC’s troubleshooting.

If the screen indicates FAILED, check for poor

connections or loose terminals at the throttle body,
the MAF sensor/IAT sensor, and the ECM/PCM,
then go to step 1. If the screen indicates
EXECUTING, keep idling until a result comes on. If
the screen indicates OUT OF CONDITION, go to
step 23.

NOTE: Before you troubleshoot, record all freeze data
and any on-board snapshot, and review the general
troubleshooting information (see page 11-3).

1. Turn the ignition switch to ON (II).

2. Check for Temporary DTCs or DTCs with the HDS.

Go to the indicated DTC’s troubleshooting.

Go to step 3.

3. Check for poor connections or a blockage at the

intake air duct.

Go to step 4.

Reconnect or repair the intake air duct, then

go to step 25.

4. Check for damage to the air cleaner housing.

Go to step 5.

Replace the air cleaner housing (see page

11-345), then go to step 25.

5. Check for dirt or debris in the air cleaner element.

Replace the air cleaner element or remove

debris (see page 11-346), then go to step 25.

Go to step 6.

Cold Start Ignition Timing

Control System Performance Problem

Is DT C P050A indicated?

Does the scr een indicate PASSED?

Ar e any T empor ar y DT Cs or DT Cs other than
P050B indicated?

Is it OK ?

Is it OK ?

Is it dir ty?

08/08/21 14:18:56 61SNR030_110_0137

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