Acura CSX. Instruction — page 124

SNR9AA7K72100092184FAAT00

YES

NO

YES

NO

YES

NO

DTC P2184:

11-170

11-170

PGM-FI System

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

28. Reset the ECM/PCM with the HDS.

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

11-310).

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

Check for poor connections or loose

terminals at ECT sensor 1, ECT sensor 2, 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 ECT SENSOR 2 in the DATA LIST with the

HDS.

Go to step 3.

Intermittent failure, the system is OK at this

time. Check for poor connections or loose terminals
at ECT sensor 2 and the ECM/PCM.

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

4. Disconnect the ECT sensor 2 2P connector.

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

6. Check ECT SENSOR 2 in the DATA LIST with the

HDS.

Go to step 7.

Go to step 11.

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

8. Jump the SCS line with the HDS.

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

ECT Sensor 2 Circuit Low Voltage

Is DT C P2183 indicated?

Is about 180 °C ( 356 °F ) or mor e, or 0.08 V or less
indicated?

Is about 180 °C ( 356 °F ) or mor e, or 0.08 V or less
indicated?

08/08/21 14:20:26 61SNR030_110_0170

01

YES

NO

YES

NO

YES

NO

11-171

ECT2
(GRN)

ECT SENSOR 2 2P CONNECTOR

10. Check for continuity between ECT sensor 2 2P

connector terminal No. 1 and body ground.

Repair short in the wire between ECT sensor

2 and the ECM/PCM (A33), then go to step 13.

Go to step 18.

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

12. Replace ECT sensor 2 (see page 11-225).

13. Reconnect all connectors.

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

15. Reset the ECM/PCM with the HDS.

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

11-310).

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

Check for poor connections or loose

terminals at ECT sensor 2 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.

18. Reconnect all connectors.

19. 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).

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

Check for poor connections or loose

terminals at ECT sensor 2 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

Is ther e continuity?

Is DT C P2184 indicated?

Is DT C P2184 indicated?

08/08/21 14:20:26 61SNR030_110_0171

01

02

SNR9AA7K72100092185FAAT00

DTC P2185:

YES

NO

YES

NO

YES

NO

11-172

PGM-FI System

JUMPER WIRE

ECT SENSOR 2 2P CONNECTOR

SG6 (BLK)

ECT2 (GRN)

ECT SENSOR 2 2P CONNECTOR

ECT2
(GRN)

ECT Sensor 2 Circuit High

Voltage

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 ECT SENSOR 2 in the DATA LIST with the

HDS.

Go to step 3.

Intermittent failure, the system is OK at this

time. Check for poor connections or loose terminals
at ECT sensor 2 and the ECM/PCM.

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

4. Disconnect the ECT sensor 2 2P connector.

5. Connect ECT sensor 2 2P connector terminals No. 1

and No. 2 with a jumper wire.

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

7. Check ECT SENSOR 2 in the DATA LIST with the

HDS.

Go to step 8.

Go to step 20.

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

9. Remove the jumper wire from ECT sensor 2 2P

connector.

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

11. Measure the voltage between ECT sensor 2 2P

connector terminal No. 1 and body ground.

Go to step 12.

Go to step 16.

Wire side of female terminals

Wire side of female terminals

Is about

40 °C (

40 °F ) or less, or 4.92 V or

mor e indicated?

Is about

40 °C (

40 °F ) or less, or 4.92 V or

mor e indicated?

Is ther e about 5 V ?

08/08/21 14:20:27 61SNR030_110_0172

03

04

YES

NO

YES

NO

11-173

ECT SENSOR 2 2P CONNECTOR

ECM/PCM CONNECTOR A (44P)

SG6 (BLK)

SG6 (BLK)

ECT SENSOR 2 2P CONNECTOR

ECM/PCM CONNECTOR A (44P)

ECT2 (GRN)

ECT2 (GRN)

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

13. Jump the SCS line with the HDS.

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

15. Check for continuity between ECT sensor 2 2P

connector terminal No. 2 and ECM/PCM connector
terminal A9.

Go to step 27.

Repair open in the wire between the ECM/

PCM (A9) and ECT sensor 2, then go to step 22.

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

17. Jump the SCS line with the HDS.

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

19. Check for continuity between ECT sensor 2 2P

connector terminal No. 1 and ECM/PCM connector
terminal A33.

Go to step 27.

Repair open in the wire between the ECM/

PCM (A33) and ECT sensor 2, then go to step 22.

Wire side of female terminals

Terminal side of female terminals

Wire side of female terminals

Terminal side of female terminals

Is ther e continuity?

Is ther e continuity?

08/08/21 14:20:27 61SNR030_110_0173

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