Acura CSX. Instruction — page 132

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11-202

PGM-FI System

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

65. Reconnect the ABS modulator-control unit 25P

connector (or the yaw rate-lateral acceleration
sensor 4P connector).

66. Disconnect SRS unit connector A (28P).

67. Turn the ignition switch to ON (II), and read the

HDS.

Replace the SRS unit (see page 24-203).

Go to step 68.

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

69. Reconnect SRS unit connector A (28P).

70. Disconnect EPS control unit connector D (28P).

71. Turn the ignition switch to ON (II), and read the

HDS.

Replace the EPS control unit (see page 17-84).

• With TPMS: Go to step 72.
• Without TPMS: 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), then recheck. If the symptom/indication
goes away with a known-good ECM/PCM,
replace the original ECM/PCM (see page 11-228).

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

73. Reconnect EPS control unit connector D (28P).

74. Disconnect the TPMS control unit 20P connector.

75. Turn the ignition switch to ON (II), and read the

HDS.

Replace the TPMS control unit (see page

18-75).

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), then
recheck. If the symptom/indication goes away with
a known-good ECM/PCM, replace the original ECM/
PCM (see page 11-228).

Does the HDS identif y the vehicle?

Does the HDS identif y the vehicle?

Does the HDS identif y the vehicle?

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YES

NO

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11-203

MIL Circuit Troubleshooting

ECM/PCM CONNECTOR A (44P)

SCS (BRN)

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

2. Do the gauge self-diagnostic function (see page

22-241).

Go to step 3.

Substitute a known-good gauge control

module (tach), and recheck. If the MIL circuit is OK,
replace the original gauge control module (tach)
(see page 22-277).

3. Connect the HDS to the DLC (see page 11-3).

4. Check the SCS in the DATA LIST with the HDS.

Go to step 5.

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), then
recheck. If the symptom/indication goes away with
a known-good ECM/PCM, replace the original ECM/
PCM (see page 11-228).

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

6. Disconnect ECM/PCM connector A (44P), then

disconnect the HDS.

7. Check for continuity between ECM/PCM connector

terminal A31 and body ground.

Repair short in the wire between the ECM/

PCM (A31) and the SRS unit, the DLC.

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), then
recheck. If the symptom/indication goes away with
a known-good ECM/PCM, replace the original ECM/
PCM (see page 11-228).

Terminal side of female terminals

Does the MIL indicator f lash?

Is a shor t indicated?

Is ther e continuity?

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NO

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11-204

PGM-FI System

DLC Circuit Troubleshooting

NOTE: Make sure the HDS and the HDS DLC cable are
not detective.

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

2. Connect the HDS to the DLC (see page 11-3).

NOTE: Make sure the HDS is properly connected to
the DLC.

3. Turn the ignition switch to ON (II), and read the

HDS.

Go to step 4.

Go to step 25.

4. Check for Temporary DTCs or DTCs in the PGM-FI

system with the HDS.

Go to the indicated DTC’s troubleshooting.

Go to step 5.

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

6. Turn the ignition switch to ON (II), and watch the

SRS indicator.

Go to the SRS system’s general

troubleshooting information (see page 24-22).

• With ABS: Go to step 7.
• With VSA system: Go to step 9.

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

8. Turn the ignition switch to ON (II), and watch the

ABS indicator.

Go to the ABS’s general troubleshooting

information (see page 19-49).

Go to step 11.

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

10. Turn the ignition switch to ON (II), and watch the

VSA indicator.

Go to the VSA system’s general

troubleshooting information (see page 19-97).

Go to step 11.

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

12. Start the engine, and watch the EPS indicator.

Go to the EPS system’s general

troubleshooting information (see page 17-19).

Go to step 13.

Does the HDS identif y the vehicle?

Ar e any T empor ar y DT Cs or DT Cs indicated?

Does the SRS indicator stay on?

Does the ABS indicator stay on?

Does the V SA indicator stay on?

Does the EPS indicator stay on?

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YES

NO

YES

NO

YES

NO

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11-205

DATA LINK CONNECTOR (DLC)

K-LINE (LT BLU)

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

14. Turn the ignition switch to ON (II), and watch the

immobilizer indicator.

Go to the immobilizer system’s

troubleshooting (see page 22-315).

• With TPMS: Go to step 15.
• Without TPMS: Go to step 17.

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

16. Turn the ignition switch to ON (II), and watch the

TPMS indicator.

Go to the TPMS’s general troubleshooting

information (see page 18-49).

Go to step 17.

17. Do the gauge self-diagnostic function (see page

22-241).

18. Check for B-CAN system DTCs without the HDS

(see page 22-74).

Go to the indicated DTC’s troubleshooting.

Go to step 19.

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

20. Disconnect the HDS from the DLC.

21. Check for continuity between DLC terminal No. 7

and body ground.

Go to step 22.

Go to step 23.

22. Continue to check for continuity between DLC

terminal No. 7 and body ground, while
disconnecting these parts, one at a time:

• SRS unit connector A (28P)
• ABS modulator-control unit 25P connector (with

ABS)

• VSA modulator-control unit 37P connector (with

VSA system)

• EPS control unit connector D (28P)
• Immobilizer-keyless control unit 7P connector
• TPMS control unit 20P connector (with TPMS)
• Audio unit 17P connector
• Under-dash fuse/relay box Q (16P) connector

Replace the part that caused an open when it

was disconnected.

Repair short in the wire between the DLC (K-

line) and the ABS modulator-control unit (with
ABS), the VSA modulator-control unit (with VSA
system), the SRS unit, the EPS control unit, the
immobilizer-keyless control unit, the audio unit, the
TPMS control unit (with TPMS), or the under-dash
fuse/relay box.

Terminal side of female terminals

Does the immobilizer indicator stay on or f lash?

Does the T PMS indicator stay on?

Ar e any B-CAN DT Cs indicated?

Is ther e continuity?

Does continuity go away when one of the above
connector s is disconnected?

08/08/21 14:21:54 61SNR030_110_0205

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