Acura CSX. Instruction — page 121

02

03

04

YES

NO

YES

NO

YES

NO

11-158

PGM-FI System

ECM/PCM CONNECTOR C (44P)

AFS

(RED/YEL)

AFS

(RED)

A/F SENSOR (SENSOR 1) 4P CONNECTOR

AFS

(RED)

JUMPER WIRE

ECM/PCM CONNECTOR C (44P)

AFS

(RED)

10. Check for continuity between ECM/PCM connector

terminals C29 and C30.

Go to step 14.

Go to step 11.

11. Remove the jumper wire from the A/F sensor

(Sensor 1) 4P connector.

12. Connect A/F sensor (Sensor 1) 4P connector

terminal No. 2 to body ground with a jumper wire.

13. Check for continuity between ECM/PCM connector

terminal C29 and body ground.

Repair open in the wire between the ECM/

PCM (C30) and the A/F sensor (Sensor 1), then go to
step 15.

Repair open in the wire between the ECM/

PCM (C29) and the A/F sensor (Sensor 1), then go to
step 15.

14. Replace the A/F sensor (Sensor 1) (see page

11-221).

15. Reconnect all connectors.

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

17. Reset the ECM/PCM with the HDS.

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

11-310).

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

Check for poor connections or loose

terminals at the A/F sensor (Sensor 1) and the ECM/
PCM, then go to step 1. If the connections and the
terminal fits are OK, go to step 21.

Go to step 20.

Terminal side of female terminals

Terminal side of male terminals

Terminal side of female terminals

Is ther e continuity?

Is ther e continuity?

Is DT C P1157 indicated?

08/08/21 14:20:23 61SNR030_110_0158

SNR9AA7K72100091172FAAT02

YES

NO

YES

NO

YES

NO

YES

NO

DTC P1172:

11-159

11-159

20. Monitor the OBD STATUS for DTC P1157 in the

DTCs MENU with the HDS.

Troubleshooting is complete. If any other

Temporary DTCs or DTCs were indicated in step 19,
go to the indicated DTC’s troubleshooting.

If the screen indicates FAILED, check for poor

connections or loose terminals at the A/F sensor
(Sensor 1) and the ECM/PCM, then go to step 1. If
the screen indicates NOT COMPLETED, keep idling
until a result comes on.

21. 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).

22. Start the engine, and let it idle.

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

If the ECM/PCM was updated, substitute a

known-good ECM/PCM (see page 11-7), then go to
step 22. If the ECM/PCM was substituted, go to step
1.

Go to step 24.

24. Monitor the OBD STATUS for DTC P1157 in the

DTCs MENU with the HDS.

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 were indicated in step 23, go to the indicated
DTC’s troubleshooting.

If the screen indicates FAILED, go to step 1. If

the ECM/PCM was updated, substitute a known-
good ECM/PCM (see page 11-7), then go to step 22.
If the ECM/PCM was substituted, go to step 1. If the
screen indicates NOT COMPLETED, keep idling
until a result comes on.

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. 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.

4. Monitor the OBD STATUS for DTC P1172 in the

DTCs MENU with the HDS.

Go to step 5.

If the screen indicates PASSED, intermittent

failure, the system is OK at this time. Check for
poor connections or loose terminals at the A/F
sensor (Sensor 1) 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 3 and recheck.

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

6. Replace the A/F sensor (Sensor 1) (see page

11-221).

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

8. Reset the ECM/PCM with the HDS.

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

11-310).

10. 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.

A/F Sensor (Sensor 1) Circuit Out

of Range High

Does the scr een indicate PASSED?

Is DT C P1157 indicated?

Does the scr een indicate PASSED?

Does the scr een indicate F AILED?

08/08/21 14:20:23 61SNR030_110_0159

SNR9AA7K72100091297FAAT00

YES

NO

YES

NO

YES

NO

YES

NO

DTC P1297:

11-160

11-160

PGM-FI System

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

Check for poor connections or loose

terminals at the A/F sensor (Sensor 1) and the ECM/
PCM, then go to step 1.

Go to step 12.

12. Monitor the OBD STATUS for DTC P1172 in the

DTCs MENU with the HDS.

Troubleshooting is complete. If any other

Temporary DTCs or DTCs were indicated in step 11,
go to the indicated DTC’s troubleshooting.

If the screen indicates FAILED, check for poor

connections or loose terminals at the A/F sensor
(Sensor 1) 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 10.

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 the ELD 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 the ELD and the ECM/PCM.

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

4. Disconnect the ELD 3P connector.

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

6. Check the ELD 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).

ELD Circuit Low Voltage

Is DT C P117 2 indicated?

Does the scr een indicate PASSED?

Is 7 2 A or mor e indicated?

Is 7 2 A or mor e indicated?

08/08/21 14:20:23 61SNR030_110_0160

01

YES

NO

YES

NO

YES

NO

11-161

ECM/PCM CONNECTOR A (44P)

ELD (ORN)

10. Check for continuity between ECM/PCM connector

terminal A23 and body ground.

Repair short in the wire between the ECM/

PCM (A23) and the ELD, then go to step 13.

Go to step 20.

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

12. Replace the ELD (see page 11-226).

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. Start the engine.

18. Turn on the headlights.

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

Check for poor connections or loose

terminals at the ELD 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.

20. Reconnect all connectors.

21. 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).

22. Start the engine.

23. Turn on the headlights.

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

Check for poor connections or loose

terminals at the ELD and the ECM/PCM. If the ECM/
PCM was updated, substitute a known-good ECM/
PCM (see page 11-7), then go to step 22. 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 P1297 indicated?

Is DT C P1297 indicated?

08/08/21 14:20:24 61SNR030_110_0161

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