ignition ACURA CSX 2006 Service Repair Manual

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DTC U0300:
YES
NO
11-190 PGM-FI System
DTC Troubleshooting (cont’d)
PGM-FI System and A/T System
Program Version Mismatch
NOTE:
 Before you troubleshoot, record all freeze data and any on-board snapshot, and review the general
troubleshooting information (see page 11-3).
 Do not turn the ignition switch to LOCK (0) while updating the PCM. If you turn the ignition switch to
LOCK (0) before completion, the PCM will be
damaged.
1. Do the PCM update procedure (PGM-FI system and A/T system) (see page 11-227).
2. Check for Temporary DTCs or DTCs with the HDS.
Replace the original PCM (see page 11-228).
The update is complete. If any other
Temporary DTCs or DTCs are indicated, go to the
indicated DTC’s troubleshooting.
Is DT C U0300 ind icated ?
08/08/21 14:21:49 61SNR030_110_0190
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YES
NO
11-191
F-CAN Circuit Troubleshooting
ECM/PCM CONNECTOR A (44P)
CANL (RED)
CANH (WHT)
1. Turn the ignition switch to LOCK (0).
2. Jump the SCS line with the HDS.
3. Disconnect ECM/PCM connector A (44P), then
disconnect the HDS.
4. Measure the resistance between ECM/PCM connector terminals A36 and A37.
Go to step 41.
Go to step 5. 5. Disconnect the gauge control module (tach) 36P
connector (see page 22- 277).
6. 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 4P
connector (see page 19-169)).
7. Disconnect SRS unit connector A (28P) (see page 24-203).
8. Disconnect EPS control unit connector D (28P) (see page 17-84).
9. With TPMS: Disconnect the TPMS control unit 20P connector (see page 18-75).
(cont’d)
Terminal side of female terminals
I s t her e about 95 116 ( w i t h ABS) or 91 111( w i t h V SA sy st em), or 88 107 ( w i t h V SAsy st em and T PM S)?
08/08/21 14:21:49 61SNR030_110_0191
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YES
NO
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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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YES
NO
YES
NO YES
NO
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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YES
NO
YES
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YES
NO
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?
08/08/21 14:21:54 61SNR030_110_0203
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YES
NO
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YES
NO YES
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YES
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YES
NO
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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YES
NO
YES
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YES
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YES
NO
YES
NO
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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Connector Terminal
YES
NO YES
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YES
NO
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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11-208PGM-FI System
DLC Circuit Troubleshooting (cont’d)
ECM/PCM CONNECTOR A (44P)
CANL (RED)
38. Check for continuity between ECM/PCM connectorterminal A37 and body ground.
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).
Repair open in the wire between the ECM/
PCM (A37) and DLC terminal No. 14. 39. Try to start the engine.
Go to the F-CAN circuit troubleshooting
(see page 11-191).
Go to step 40.
40. Turn the ignition switch to LOCK (0).
41. Check the No. 2 IG MAIN (50 A) fuse in the under- hood fuse/relay box.
Repair open in the wire between the No. 2 IG
MAIN (50 A) fuse and the ignition switch. If the wire
isOK,gotostep42.
Repair short in the wire between the No. 2 IG
MAIN (50 A) fuse and the under-hood fuse/relay
box.AlsoreplacetheNo.2IGMAIN(50A)fuse.
Terminal side of female terminals
Is there continuity? Does t he engi ne st ar t and i d l e smoot hl y ?
IsthefuseOK?
08/08/21 14:21:56 61SNR030_110_0208
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11-210PGM-FI System
DLC Circuit Troubleshooting (cont’d)
IGP
PGM-FI MAIN RELAY 1 4P CONNECTOR
IGP
PGM-FI MAIN RELAY 1 4P CONNECTOR
46. Disconnect each of the parts or connectors these
parts, one at a time, while checking for continuity
between PGM-FI main relay 1 4P connector
terminal No. 2 and body ground.
 PGM-FI main relay 2 (FUEL PUMP)
 ECM/PCM connector A (44P)
 Each injector 2P connector
 Camshaft position (CMP) sensor B 3P connector
 Crankshaft position (CKP) sensor 3P connector
 Ignition coil relay
 Electronic throttle control system (ETCS) control relay
Replace the part that made the short to body
ground go away when disconnected. Reconnect all
connectors, then 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). Also replace the
No.19FIMAIN(15A)fuse.
Go to step 47.
47. Disconnect the connectors from these parts:  PGM-FI main relay 2 (FUEL PUMP)
 ECM/PCM connector A (44P)
Injectors
 Camshaft position (CMP) sensor B
 Crankshaft position (CKP) sensor
 Ignition coil relay
 Electronic throttle control system (ETCS) controlrelay 48. Check for continuity between PGM-FI main relay 1
4P connector terminal No. 2 and body ground.
Repair short in the wire between PGM-FI
main relay 1 and each part. Also replace the No. 19
FI MAIN (15 A) fuse.
Replace PGM-FI main relay 1. Also replace the
No.19FIMAIN(15A)fuse.
49. Inspect the No. 2 FUEL PUMP (15 A) fuse in the under-dash fuse/relay box.
Go to step 61.
Go to step 50.
50. Remove the blown No. 2 FUEL PUMP (15 A) fuse from the under-dash fuse/relay box.
Terminal side of female terminals Terminal side of female terminals
Does cont i nui t y go aw ay w hen one of t he abov e
component s i s d i sconnect ed ? Is there continuity?
IsthefuseOK?
08/08/21 14:21:57 61SNR030_110_0210
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