Acura CSX. Instruction — page 144

01

SNR9AA7K72100092101FAAT30

YES

NO

YES

NO

YES

NO

YES

NO

DTC P2101:

11-249

11-249

9. Push the throttle valve open as shown.

10. Release the throttle valve.

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

then go to step 12 and recheck. If DTC P1684 is
indicated, go to step 11.

Go to step 11.

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

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

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

13. Reset the ECM/PCM with the HDS.

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

11-310).

15. Turn the ignition switch to LOCK (0), and wait

10 seconds.

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

17. 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 go to step 1.

Troubleshooting is complete. If any other

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

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).

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

2. Clear the DTC with the HDS.

3. Do the ETCS TEST in the INSPECTION MENU with

the HDS.

4. Check for Temporary DTCs or DTCs 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
• APP SENSOR

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

Go to step 7.

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).

ETCS Malfunction

Does the thr ottle valve r etur n?

Is DT C P1684 indicated?

Is DT C P2101 indicated?

Is DT C P2101 indicated?

08/08/21 14:26:43 61SNR030_110_0249

01

02

YES

NO

YES

NO

11-250

Electronic Throttle Control System

THROTTLE BODY 6P CONNECTOR

ETCSM
(GRN/YEL)

ETCSM
(BLU/RED)

JUMPER WIRE

ECM/PCM CONNECTOR C (44P)

ETCSM

(BLU/RED)

ETCSM

(GRN/YEL)

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

8. Disconnect the intake air duct from the throttle

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

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

10. Clear the DTC with the HDS.

11. Do the ETCS TEST in the INSPECTION MENU with

the HDS.

12. Visually check the throttle valve operation.

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

then go to step 22 and recheck. If DTC P2101 is
indicated, go to step 19.

Go to step 13.

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

14. Disconnect the throttle body 6P connector.

15. Jump the SCS line with the HDS.

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

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

and No. 6 with a jumper wire.

18. 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 21.

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

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

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

21. Reconnect all connectors.

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

23. Reset the ECM/PCM with the HDS.

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

11-310).

Wire side of female terminals

Terminal side of female terminals

Does the thr ottle valve oper ate smoothly?

Is ther e continuity?

08/08/21 14:26:44 61SNR030_110_0250

01

SNR9AA7K72100092118FAAT30

YES

NO

YES

NO

YES

NO

DTC P2118:

11-251

11-251

ECM/PCM CONNECTOR C (44P)

ETCSM

(BLU/RED)

ETCSM

(GRN/YEL)

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

range of these recorded freeze data parameters:

• ENGINE SPEED
• VSS
• APP SENSOR

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. Test-drive the vehicle for several minutes in the

range of these recorded freeze data parameters:

• ENGINE SPEED
• VSS
• APP SENSOR

30. 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.

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

1. Jump the SCS line with the HDS.

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

3. Measure the resistance between ECM/PCM

connector terminals C3 and C4.

Go to step 4.

Go to step 15.

Throttle Actuator Current Range/

Performance Problem

Terminal side of female terminals

Is DT C P2101 indicated?

Is DT C P2101 indicated?

Is ther e about 1.0

or less?

08/08/21 14:26:44 61SNR030_110_0251

02

YES

NO

YES

NO

YES

NO

11-252

Electronic Throttle Control System

THROTTLE BODY 6P CONNECTOR

ETCSM

ETCSM

4. Disconnect the throttle body 6P connector.

5. At the throttle body side, measure the resistance

between throttle body 6P connector terminals No. 5
and No. 6 with the throttle fully closed.

Go to step 6.

Repair short in the wires between the ECM/

PCM C3 (ETCSM

line) and C4 (ETCSM

line),

then go to step 7.

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

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

7. Reconnect all connectors.

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

9. Reset the ECM/PCM with the HDS.

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

11-310).

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

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

13. Slowly press the accelerator pedal to the floor.

14. 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 go to step 1.

Troubleshooting is complete. If any other

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

15. Reconnect all connectors.

16. 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).

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

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

19. Slowly press the accelerator pedal to the floor.

20. 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 17.
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 male terminals

Is ther e about 1.0

or less?

Is DT C P2118 indicated?

Is DT C P2118 indicated?

08/08/21 14:26:44 61SNR030_110_0252

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