Acura CSX. Instruction — page 148

YES

NO

YES

NO

11-265

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

13. Replace the accelerator pedal module; K20Z2

engine (see page 11-269), K20Z3 engine (see page
11-270).

14. Reconnect all connectors.

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

16. Reset the ECM/PCM with the HDS.

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

11-310).

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

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

20. Press the accelerator pedal to the floor.

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

Check for poor connections or loose

terminals at the APP sensor 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.

22. Reconnect all connectors.

23. 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).

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

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

26. Press the accelerator pedal to the floor.

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

Check for poor connections or loose

terminals at the APP sensor and the ECM/PCM. If
the ECM/PCM was updated, substitute a known-
good ECM/PCM (see page 11-7), then go to step 23.
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.

Is DT C P2138 indicated?

Is DT C P2138 indicated?

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DTC P2176:

YES

NO

YES

NO

YES

NO

11-266

Electronic Throttle Control System

THROTTLE BODY 6P CONNECTOR

ETCSM
(GRN/YEL)

ETCSM
(BLU/RED)

JUMPER WIRE

Throttle Actuator Control System

Idle Position Not Learned

Do not insert your fingers into the installed throttle
body when you turn the ignition switch to ON (II) or
while the ignition switch is ON (II). If you do, you
will seriously injure your fingers if the throttle valve
is activated.

NOTE:

• Before you troubleshoot, record all freeze data and

any on-board snapshot, and review the general
troubleshooting information (see page 11-3).

• If DTC P2135 is stored at the same time as DTC P2176,

troubleshoot DTC P2135 first, then recheck for DTC
P2176.

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

2. Clear the DTC with the HDS.

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

4. Turn the ignition switch to ON (II), and wait

10 seconds.

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

Go to step 6.

Intermittent failure, the system is OK at this

time. Check for poor connections or loose terminals
at the throttle body and the ECM/PCM, then clean
the throttle body (see page 11-344).

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

7. Disconnect the intake air duct from the throttle

body; K20Z2 engine (see page 11-348), K20Z3
engine (see page 11-349).

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

9. Clear the DTC with the HDS.

10. Visually check the throttle valve operation while

doing the ETCS TEST in the INSPECTION MENU
with the HDS.

Go to step 11.

Go to step 12.

11. Check for sludge or carbon on the throttle valve.

Clean the throttle body (see page 11-344),

then go to step 21 and recheck.

Go to step 18.

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

13. Disconnect the throttle body 6P connector.

14. Jump the SCS line with the HDS.

15. Disconnect ECM/PCM connector C (44P).

16. Connect throttle body 6P connector terminals No. 5

and No. 6 with a jumper wire.

Wire side of female terminals

Is DT C P217 6 indicated?

Does the thr ottle valve move to its f ully closed
position?

Is ther e sludge or car bon on the thr ottle valve?

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02

YES

NO

YES

NO

YES

NO

11-267

ECM/PCM CONNECTOR C (44P)

ETCSM

(GRN/YEL)

ETCSM

(BLU/RED)

17. Check for continuity between ECM/PCM connector

terminals C3 and C4.

Go to step 27.

Repair open in the wires between the throttle

body and the ECM/PCM (C3, C4), then go to step 20.

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

19. Replace the throttle body; K20Z2 engine (see page

11-348), K20Z3 engine (see page 11-349).

20. Reconnect all connectors.

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

22. Reset the ECM/PCM with the HDS.

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

11-310).

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

25. Turn the ignition switch to ON (II), and wait

10 seconds.

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

Check for poor connections or loose

terminals at the throttle body and the ECM/PCM,
then clean the throttle body (see page 11-344), and
go to step 1.

Troubleshooting is complete. If any other

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

27. Reconnect all connectors.

28. 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).

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

30. Turn the ignition switch to ON (II), and wait

10 seconds.

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

Check for poor connections or loose

terminals at the throttle body and the ECM/PCM. If
the ECM/PCM was updated, substitute a known-
good ECM/PCM (see page 11-7), then go to step 29.
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.

Terminal side of female terminals

Is ther e continuity?

Is DT C P217 6 indicated?

Is DT C P217 6 indicated?

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01

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11-268

Electronic Throttle Control System

APP Sensor Signal Inspection

A

NOTE:

• This procedure checks the APP sensor in its fully

closed position. In any other position, the APP sensor
stores DTCs which are covered in other
troubleshooting procedure.

• Check for Temporary DTCs or DTCs with the HDS

before doing this procedure. If any DTCs are
indicated, troubleshoot them first, then do this
procedure.

• Press the accelerator pedal several times to check its

operation. If it does not operate smoothly, check the
pedal. If you find a problem, replace the accelerator
pedal module; K20Z2 engine (see page 11-269),
K20Z3 engine (see page 11-270).

1. Connect the HDS to the data link connector (DLC)

(A) located under the driver’s side of the dashboard.

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

3. Make sure the HDS communicates with the ECM/

PCM. If it doesn’t, go to the DLC circuit
troubleshooting (see page 11-204).

4. Make sure the accelerator pedal is not pressed,

then check the APP SENSOR in the DATA LIST with
the HDS.

• If it is 0 %, the APP sensor is OK.
• If it is not 0 %, update the ECM/PCM if it does not

have the latest software, or substitute a known-
good ECM/PCM (see page 11-7), then go to step
5.

5. With the accelerator pedal not pressed, then check

the APP SENSOR in the DATA LIST with the HDS.

• If it is 0 %, the APP sensor is OK.
• If it is not 0 %, replace the accelerator pedal

module; K20Z2 engine (see page 11-269), K20Z3
engine (see page 11-270), then go to step 1.

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