Acura CSX. Instruction — page 147

02

03

YES

NO

YES

NO

YES

NO

11-261

APP SENSOR 6P CONNECTOR

SG5 (LT BLU)

JUMPER WIRE

ECM/PCM CONNECTOR A (44P)

SG5 (LT BLU)

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

8. Jump the SCS line with the HDS.

9. Disconnect ECM/PCM connector A (44P).

10. Connect APP sensor 6P connector terminal No. 5 to

body ground with a jumper wire.

11. Check for continuity between ECM/PCM connector

terminal A34 and body ground.

Go to step 19.

Repair open in the wire between the ECM/

PCM (A34) and the APP sensor, then go to step 14.

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. 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.

19. Reconnect all connectors.

20. 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).

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. 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.

Wire side of female terminals

Terminal side of female terminals

Is ther e continuity?

Is DT C P2128 indicated?

Is DT C P2128 indicated?

08/08/21 14:26:49 61SNR030_110_0261

01

SNR9AA7K72100092135FAAT30

DTC P2135:

YES

NO

YES

NO

YES

NO

11-262

Electronic Throttle Control System

ECM/PCM CONNECTOR C (44P)

TPSB (RED/BLU)

TPSA
(RED/BLK)

TP Sensor A/B Incorrect Voltage

Correlation

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 5.

Intermittent failure, the system is OK at this

time. Check for poor connections or loose terminals
at the throttle body and the ECM/PCM.

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

6. Disconnect the intake air duct from the throttle

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

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

8. Visually check the throttle valve operation while

you clear the DTC with the HDS.

Go to step 15.

Go to step 9.

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

10. Jump the SCS line with the HDS.

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

12. Check for continuity between ECM/PCM connector

terminals C20 and C21.

Go to step 13.

Go to step 22.

Terminal side of female terminals

Is DT C P2135 indicated?

Does the valve tempor ar ily move to its f ully
closed position?

Is ther e continuity?

08/08/21 14:26:49 61SNR030_110_0262

02

YES

NO

YES

NO

YES

NO

11-263

ECM/PCM CONNECTOR C (44P)

TPSB (RED/BLU)

TPSA
(RED/BLK)

13. Disconnect the throttle body 6P connector.

14. Check for continuity between ECM/PCM connector

terminals C20 and C21.

Repair short in the wires between ECM/PCM

connector terminals C20 (TPSA line) and C21 (TPSB
line), then go to step 17.

Go to step 15.

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

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

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

17. Reconnect all connectors.

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

19. Reset the ECM/PCM with the HDS.

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

11-310).

21. 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.

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. 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 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.

Terminal side of female terminals

Is ther e continuity?

Is DT C P2135 indicated?

Is DT C P2135 indicated?

08/08/21 14:26:49 61SNR030_110_0263

01

01

SNR9AA7K72100092138FAAT30

DTC P2138:

YES

NO

YES

NO

YES

NO

YES

NO

11-264

Electronic Throttle Control System

ECM/PCM CONNECTOR A (44P)

APSB (PUR)

APSA (YEL)

ECM/PCM CONNECTOR A (44P)

APSB (PUR)

APSA (YEL)

APP Sensor A/B (TP Sensor D/E)

Incorrect Voltage Correlation

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 HDS.

3. Press the accelerator pedal to the floor.

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

Go to step 5.

Intermittent failure, the system is OK at this

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

5. Check APP SENSOR A and APP SENSOR B in the

DATA LIST with the HDS.

Go to step 6.

Go to step 12.

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

7. Jump the SCS line with the HDS.

8. Disconnect ECM/PCM connector A (44P).

9. Check for continuity between ECM/PCM connector

terminals A17 and A18.

Go to step 10.

Go to step 22.

10. Disconnect the APP sensor 6P connector.

11. Check for continuity between ECM/PCM connector

terminals A17 and A18.

Repair short in the wires between the ECM/

PCM A17 (APSA line) and A18 (APSB line), then go
to step 14.

Go to step 13.

Terminal side of female terminals

Terminal side of female terminals

Is DT C P2138 indicated?

Ar e they the same voltage?

Is ther e continuity?

Is ther e continuity?

08/08/21 14:26:50 61SNR030_110_0264

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