sensor ACURA CSX 2006 Service Repair Manual

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11-197
ECM/PCM CONNECTOR A (44P)
CANL (RED)
CANH (WHT) ECM/PCM CONNECTOR A (44P)
CANL (RED)
CANH (WHT)
28. Measure the resistance between ECM/PCM
connector terminals A36 and A37.
Go to step 29.
Substitute a known-good VSA modulator-
control unit (see page 19-171). If the HDS identifies
the vehicle, replace the original VSA modulator-
control unit (see page 19-171).
29. Disconnect the VSA modulator-control unit 37P connector.
30. Reconnect the yaw rate-lateral acceleration sensor 5P connector. 31. Measure the resistance between ECM/PCM
connector terminals A36 and A37.
Go to step 32.
Substitute a known-good yaw rate-lateral
acceleration sensor (see page 19-169). If the HDS
identifies the vehicle, replace the original yaw rate-
lateral acceleration sensor (see page 19-169).
32. Disconnect the yaw rate-lateral acceleration sensor 5P connector.
33. Reconnect SRS unit connector A (28P).
(cont’d)
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?
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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?
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11-216PGM-FI System
DLC Circuit Troubleshooting (cont’d)
ECM/PCM CONNECTOR C (44P)
VCC1 (YEL/RED) ECM/PCM CONNECTOR B (44P)
VCC2 (YEL/BLU) (YEL)*
*:K20Z3engine
77. Check for continuity between ECM/PCM connector terminal C13 and body ground.
Go to step 78.
Go to step 79.
78. Continue to check for continuity between ECM/PCM connector terminal C13 and body ground, while
disconnecting these connectors, one at a time:
 MAP sensor 3P connector
 Output shaft (countershaft) speed sensor 3P connector (K20Z2 engine)
Replace the part that caused an open when it
was disconnected.
Repair short in the wire between the ECM/
PCM (C13) and the MAP sensor or the output shaft
(countershaft) speed sensor (K20Z2 engine). 79. Check for continuity between ECM/PCM connector
terminal B18 and body ground.
Go to step 80.
Go to step 81.
80. Continue to check for continuity between ECM/PCM connector terminal B18 and body ground, while
disconnecting these connectors, one at a time:
 EGR valve 6P connector (K20Z2 engine)
 Input shaft (mainshaft) speed sensor 3P connector (K20Z2 engine)
 Output shaft (countershaft) speed sensor 3P connector (K20Z3 engine)
Replace the part that caused an open when it
was disconnected.
Repair short in the wire between the ECM/
PCM (B18) and the EGR valve (K20Z2 engine), the
input shaft (mainshaft) speed sensor (K20Z2
engine) or the output shaft (countershaft) speed
sensor (K20Z3 engine).
Terminal side of female terminals Terminal side of female terminals
Is there continuity?
Does cont i nui t y go aw ay w hen one of t he abov ecomponent s i s d i sconnect ed ? Is there continuity?
Does cont i nui t y go aw ay w hen one of t he abov epar t s i s d i sconnect ed ?
08/08/21 14:23:33 61SNR030_110_0216
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11-217
ECM/PCM CONNECTOR C (44P)
VCC3 (BLU) ECM/PCM CONNECTOR A (44P)
VCC4
(BRN)
81. Check for continuity between ECM/PCM connectorterminal C12 and body ground.
Go to step 82.
Go to step 83.
82. Continue to check for continuity between ECM/PCM connector terminal C12 and body ground, while
disconnecting the throttle body 6P connector.
Repair short in the wire between the ECM/
PCM (C12) and the throttle body.
Replace the throttle body; K20Z2 engine
(see page 11-348), K20Z3 engine (see page 11-349). 83. Check for continuity between ECM/PCM connector
terminal A25 and body ground.
Go to step 84.
Go to step 85.
84. Continue to check for continuity between ECM/PCM connector terminal A25 and body ground, while
disconnecting the APP sensor 6P connector.
Repair short in the wire between the ECM/
PCM (A25) and the APP sensor.
Replace the accelerator pedal module; K20Z2
engine (see page 11-269), K20Z3 engine (see page
11-270).
(cont’d)
Terminal side of female terminals Terminal side of female terminals
Is there continuity?
Is there continuity? Is there continuity?
Is there continuity?
08/08/21 14:23:34 61SNR030_110_0217
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11-218PGM-FI System
DLC Circuit Troubleshooting (cont’d)
ECM/PCM CONNECTOR A (44P)
VCC5 (GRY) ECM/PCM CONNECTOR A (44P)
VCC6
(RED)
85. Check for continuity between ECM/PCM connectorterminal A24 and body ground.
Go to step 86.
Go to step 87.
86. Continue to check for continuity between ECM/PCM connector terminal A24 and body ground, while
disconnecting the APP sensor 6P connector.
Repair short in the wire between the ECM/
PCM (A24) and the APP sensor.
Replace the accelerator pedal module; K20Z2
engine (see page 11-269), K20Z3 engine (see page
11-270). 87. Check for continuity between ECM/PCM connector
terminal A19 and body ground.
Go to step 88.
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).
88. Continue to check for continuity between ECM/PCM connector terminal A19 and body ground, while
disconnecting these parts, one at a time:
 A/C pressure sensor 3P connector
 FTP sensor 3P connector
Replace the part that caused an open when it
was disconnected.
Repair short in the wire between the ECM/
PCM (A19) and the A/C pressure sensor or the FTP
sensor.
Terminal side of female terminals Terminal side of female terminals
Is there continuity?
Is there continuity? 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 14:23:34 61SNR030_110_0218
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Special Tools Required Special Tools Required
11-22111-221
A/F Sensor Replacement
Secondary HO2S Replacement
C
44 N·m
(4.5 kgf·m,
33 lbf·ft)
A
B
C
44 N·m
(4.5 kgf·m, 33 lbf·ft)A
B
O2 sensor wrench, Snap-on YA8875 or SWR2, or
equivalent, commercially available
1. Disconnect the A/F sensor 4P connector (A) and remove the clamp (B), then remove the A/F sensor
(C).
2. Install the parts in the reverse order of removal. O2 sensor wrench, Snap-on YA8875 or SWR2, or
equivalent, commercially available
1. Disconnect the secondary HO2S 4P connector (A) and remove the clamps (B), then remove the
secondary HO2S (C).
2. Install the parts in the reverse order of removal.
08/08/21 14:23:36 61SNR030_110_0221
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