ACURA CSX 2006 Service Repair Manual

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11-198PGM-FI System
F-CAN Circuit Troubleshooting (cont’d)
ECM/PCM CONNECTOR A (44P)
CANL (RED)
CANH (WHT) ECM/PCM CONNECTOR A (44P)
CANL (RED)
CANH (WHT)
34. Measure the resistance between ECM/PCM
connector terminals A36 and A37.
Go to step 35.
Substitute a known-good SRS unit (see page
24-203). If the HDS identifies the vehicle, replace
the original SRS unit (see page 24-203).
35. Disconnect SRS unit connector A (28P).
36. Reconnect EPS control unit connector D (28P). 37. Measure the resistance between ECM/PCM
connector terminals A36 and A37.
 With TPMS: Go to step 38.
 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).
Substitute a known-good EPS control unit
(see page 17-84). If the HDS identifies the vehicle,
replace the original EPS control unit (see page
17-84).
Terminal side of female terminals Terminal side of female terminals
Is t her e about 2.34 2.86 k ?Is t her e about 2.34 2.86 k ?
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11-199
ECM/PCM CONNECTOR A (44P)
CANL (RED)
CANH (WHT)
38. Disconnect EPS control unit connector D (28P).
39. Reconnect the TPMS control unit 20P connector.
40. Measure the resistance between ECM/PCM
connector terminals A36 and A37.
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).
Substitute a known-good TPMS control unit
(see page 18-75). If the HDS identifies the vehicle,
replace the original TPMS control unit (see page
18-75). 41. Disconnect the gauge control module (tach) 36P
connector (see page 22- 277).
42. Disconnect the ABS modulator-control unit 25P connector (see page 19-90) (or the VSA modulator-
control unit 37P connector (see page 19-171) and
the yaw rate-lateral acceleration sensor 5P
connector (see page 19-169)).
43. Disconnect SRS unit connector A (28P) (see page 24-203).
44. Disconnect EPS control unit connector D (28P) (see page 17-84).
45. With TPMS: Disconnect the TPMS control unit 20P connector (see page 18-75).
(cont’d)
Terminal side of female terminals
Is t her e about 2.34 2.86 k ?
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11-200PGM-FI System
F-CAN Circuit Troubleshooting (cont’d)
ECM/PCM CONNECTOR A (44P)
CANH (WHT) ECM/PCM CONNECTOR A (44P)
CANL (RED)
46. Check for continuity between ECM/PCM connectorterminal A36 and body ground.
Repair short in the wire between the ECM/
PCM connector terminal A36 and the gauge control
module (tach), the ABS modulator-control unit, the
VSA modulator-control unit, the yaw rate-lateral
acceleration sensor, the SRS unit, the EPS control
unit, the TPMS control unit (with TPMS), or the
DLC.
Go to step 47. 47. Check for continuity between ECM/PCM connector
terminal A37 and body ground.
Repair short in the wire between ECM/PCM
connector terminal A37 and the gauge control
module (tach), the ABS modulator-control unit, the
VSA modulator-control unit, the yaw rate-lateral
acceleration sensor, the SRS unit, the EPS control
unit, the TPMS control unit (with TPMS), or the
DLC.
Go to step 48.
Terminal side of female terminals Terminal side of female terminals
I s t her e cont i nui t y ?I s t her e cont i nui t y ?
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11-201
48. Reconnect all connectors.
49. Connect the HDS to the DLC (see page 11-3).
50. Disconnect the gauge control module (tach) 36P
connector.
51. Turn the ignition switch to ON (II), and read the HDS.
Replace the gauge control module (tach)
(see page 22-277).
 With ABS: Go to step 52.
 WithVSAsystem:Gotostep56.
52. Turn the ignition switch to LOCK (0).
53. Reconnect the gauge control module (tach) 36P connector.
54. Disconnect the ABS modulator-control unit 25P connector.
55. Turn the ignition switch to ON (II), and read the HDS.
Replace the ABS modulator-control unit
(see page 19-90).
Go to step 64. 56. Turn the ignition switch to LOCK (0).
57. Reconnect the gauge control module (tach) 36P
connector.
58. Disconnect the VSA modulator-control unit 37P connector.
59. Turn the ignition switch to ON (II), and read the HDS.
Replace the VSA modulator-control unit
(see page 19-171).
Go to step 60.
60. Turn the ignition switch to LOCK (0).
61. Reconnect the VSA modulator-control unit 37P connector.
62. Disconnect the yaw rate-lateral acceleration sensor 5P connector.
63. Turn the ignition switch to ON (II), and read the HDS.
Replace the yaw rate-lateral acceleration
sensor (see page 19-169).
Go to step 64.
(cont’d)
Does the HDS identif y the vehicle?Does the HDS identif y the vehicle? Does the HDS identif y the vehicle?
Does the HDS identif y the vehicle?
08/08/21 14:21:53 61SNR030_110_0201
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11-202PGM-FI System
F-CAN Circuit Troubleshooting (cont’d)
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?
08/08/21 14:21:54 61SNR030_110_0202
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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 page22-241).
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?
I s a shor t i nd i cat ed ? Is there continuity?
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11-204PGM-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.
 WithVSAsystem:Gotostep9. 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 i nd i cat ed ?
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?
08/08/21 14:21:54 61SNR030_110_0204
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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 theimmobilizer 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 c onnector
 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.
(cont’d)
Terminal side of female terminals
Does the immobilizer indicator stay on or f lash?
Does t he T PM S i nd i cat or st ay on?Ar e any B-CAN DT Cs i nd i cat ed ? Is there continuity?
Does cont i nui t y go aw ay w hen one of t he abov econnect or s i s d i sconnect ed ?
08/08/21 14:21:54 61SNR030_110_0205
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11-206
PGM-FI System
DLC Circuit Troubleshooting (cont’d)
DATA LINK CONNECTOR (DLC)
K-LINE (LT BLU)
JUMPER WIRE
DATA LINK CONNECTOR (DLC)B(WHT)
23. Connect DLC terminal No. 7 to body ground with ajumper wire.
24. Check for continuity between body ground and these connector terminals:
SRS unit A (28P) No. 24 (LT BLU)
ABS modulator-control unit
25P (with ABS) No. 10
(LT BLU)
VSA modulator-control unit
37P (with VSA system) No. 26
(LTBLU)
EPS control unit D (28P) No. 17 (LT BLU)
Immobilizer-keyless control
unit 7P No. 5 (LT BLU)
TPMS control unit 20P No. 7 (LT BLU)
Audio unit 17P No. 6 (LT BLU)
Under-dash fuse/relay box Q
(16P) No. 8 (LT BLU)
Replace the part which cannot communicate
with the HDS.
Repair open in the wire between the DLC (K-
line) and the appropriate connector. 25. Do the gauge self-diagnostic function (see page
22-241).
26. Check for B-CAN system DTCs without the HDS (see page 22-74).
Go to step 39.
Go to step 27.
27. Turn the ignition switch to LOCK (0).
28. Disconnect the HDS from the DLC.
29. Measure the voltage between DLC terminal No. 16 and body ground.
Go to step 30.
Repair open in the wire between DLC terminal
No.16andtheNo.23BACKUP(10A)fuseinthe
under-hood fuse/relay box.
Terminal side of female terminals
Terminal side of female terminals
Is t her e cont i nui t y bet w een t he bod y gr ound andeach of t he t er mi nal s i n t he char t ? I s DT C B1168, B1169, and / or B117 8 i nd i cat ed ?
Is there battery voltage?
08/08/21 14:21:55 61SNR030_110_0206
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11-207
DATA LINK CONNECTOR (DLC)
B(WHT)
GND (BLK)
DATA LINK CONNECTOR (DLC) JUMPER WIRE
CANH (WHT) ECM/PCM CONNECTOR A (44P)
CANH (WHT)
DATA LINK CONNECTOR (DLC) CANL (RED)
JUMPER WIRE
30. Measure the voltage between DLC terminals No. 4 and No. 16.
Go to step 31.
Repair open in the wire between DLC terminal
No. 4 and body ground (G 502) (see page 22-32).
31. Connect the HDS to the DLC (see page 11-3).
32. Jump the SCS line with the HDS.
33. Disconnect ECM/PCM connector A (44P).
34. Disconnect the HDS from the DLC.
35. Connect DLC terminal No. 6 to body ground with a jumper wire. 36. Check for continuity between ECM/PCM connector
terminal A36 and body ground.
Go to step 37.
Repair open in the wire between the ECM/
PCM (A36) and DLC terminal No. 6.
37. Connect DLC terminal No. 14 to body ground with a jumper wire.
(cont’d)
Terminal side of female terminals
Terminal side of female terminals Terminal side of female terminals
Terminal side of female terminals
Is there battery voltage? Is there continuity?
08/08/21 14:21:56 61SNR030_110_0207
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