2006 ACURA CSX Service Repair Manual

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Page 1025 of 2893

ACURA CSX 2006 Service Repair Manual
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14-109
INPUT SHAFT
(MAINSHAFT)
SPEED SENSOR
CONNECTOR
PCM CONNECTOR B (44P)
NM (WHT/RED) NM
(WHT/RED) INPUT SHAFT
(MAINSHAFT)
SPEED SENSOR
CONNECTOR
VCC2 (YEL/BL

Page 1026 of 2893

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14-110Automatic Transmission
DTC Troubleshooting (cont’d)
23. Reconnect all connectors.
24. Turn the ignition switch to ON (II).
25. Clear

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14-110Automatic Transmission
DTC Troubleshooting (cont’d)
23. Reconnect all connectors.
24. Turn the ignition switch to ON (II).
25. Clear the DTC with the HDS.
26. Test-drive the vehicle with the shift lever in D at
speeds over 20 km/h (12 mph), and let the
transmission shift through all five gears.
27. Check for Temporary DTCs or DTCs with the HDS.
Check for poor connections or loose
terminals between the input shaft (mainshaft)
speed sensor and the PCM, then go to step 1.
Go to step 28.
28. Monitor the OBD STATUS for P0718 in the DTCs MENU with the HDS.
Troubleshooting is complete. If any other
Temporary DTCs or DTCs were indicated in step 27,
go to the indicated DTC’s troubleshooting.
If the HDS indicates FAILED, check for poor
connections or loose terminals between the input
shaft (mainshaft) speed sensor and the PCM, then
go to step 1. If the HDS indicates NOT COMPLETED,
go to step 26. 29. Reconnect all connectors.
30. Update the PCM if it does not have the latest
software (see page 11-227), or substitute a known-
good PCM (see page 11-7).
31. Test-drive the vehicle with the shift lever in D at speeds over 20 km/h (12 mph), and let the
transmission shift through all five gears.
32. Check for Temporary DTCs or DTCs with the HDS.
Check for poor connections or loose
terminals between the input shaft (mainshaft)
speed sensor and the PCM. If the PCM was updated,
substitute a known-good PCM (see page 11-7), then
go to step 31. If the PCM was substituted, go to step
1.
Go to step 33.
33. Monitor the OBD STATUS for P0718 in the DTCs MENU with the HDS.
If the PCM was updated, troubleshooting is
complete. If the PCM was substituted, replace the
original PCM (see page 11-228). If any other
Temporary DTCs or DTCs were indicated in step 32,
go to the indicated DTC’s troubleshooting.
If the HDS indicates FAILED, check for poor
connections or loose terminals between the input
shaft (mainshaft) speed sensor and the PCM. If the
PCM was updated, substitute a known-good PCM
(see page 11-7), then go to step 31. If the PCM was
substituted, go to step 1. If the HDS indicates NOT
COMPLETED, go to step 31.
Is DTC P0718 indicated?
Does the HDS ind icate PASSED? Is DTC P0718 indicated?
Does the HDS ind icate PASSED?
08/08/21 14:41:07 61SNR030_140_0112
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Page 1027 of 2893

ACURA CSX 2006 Service Repair Manual
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DTC P0721:
DTC P0722:
YES
NO YES
NO
14-111
PCM CONNECTOR C (44P)
LG2 (BRN/YEL)
LG1 (BRN/YEL)
Problem in Output Shaft
(Countersha

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DTC P0721:
DTC P0722:
YES
NO YES
NO
14-111
PCM CONNECTOR C (44P)
LG2 (BRN/YEL)
LG1 (BRN/YEL)
Problem in Output Shaft
(Countershaft) Speed Sensor Circuit
Problem in Output Shaft
(Countershaft) Speed Sensor Circuit (No
Signal Input)
NOTE:
Before you troubleshoot, record all freeze data and any on-board snapshot with the HDS, and review
General Troubleshooting Information (see page 14-3).
This code is caused by an electrical circuit problem and cannot be caused by a mechanical problem in the
transmission.
1. Check for proper output shaft (countershaft) speed sensor installation (see page 14-227).
2. Turn the ignition switch to ON (II).
3. Clear the DTC with the HDS.
4. Raise the front of the vehicle, make sure it is securely supported, and allow the front wheels to
rotate freely, or raise the vehicle on a lift.
5. Start the engine, disable the VSA by pressing the VSA OFF switch (if equipped), run the vehicle with
the shift lever in D and the engine speed 2,000 rpm
or higher, for at least 10 seconds. Slow down and
stop the wheels.
6. Monitor the OBD STATUS for P0721 or P0722 in the DTCs MENU with the HDS.
Go to step 7.
If the HDS indicates PASSED, intermittent
failure, the system is OK at this time. Check for
poor connections or loose terminals between the
output shaft (countershaft) speed sensor and the
PCM. If the HDS indicates NOT COMPLETED, go to
step 5. 7. Turn the ignition switch to LOCK (0).
8. Jump the SCS line with the HDS.
9. Disconnect PCM connector C (44P).
10. Check for continuity between PCM connector terminal C40 and body ground, and between PCM
connector terminal C44 and body ground.
Go to step 11.
Repair open in the wires between PCM
connector terminals C40, C44, and body ground
(G101) (see page 22-16), or repair poor body
ground (G 101), then go to step 26.
(cont’d)
Terminal side of female terminals
Does the HDS ind icate F AILED? Is there continuity?
08/08/21 14:41:07 61SNR030_140_0113
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Page 1028 of 2893

ACURA CSX 2006 Service Repair Manual
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14-112Automatic Transmission
DTC Troubleshooting (cont’d)
OUTPUT SHAFT (COUNTERSHAFT)
SPEED SENSOR CONNECTOR
VCC1 (YEL/RED) OUTPUT SHAFT
(COUNTERSHAFT)
SPEED S

Page 1029 of 2893

ACURA CSX 2006 Service Repair Manual
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14-113
OUTPUT SHAFT (COUNTERSHAFT)
SPEED SENSOR CONNECTOR
NC (BLK/WHT) SG1 (GRN/WHT) OUTPUT SHAFT (COUNTERSHAFT)
SPEED SENSOR CONNECTOR
NC (BLK/WHT)
19. Measure

Page 1030 of 2893

ACURA CSX 2006 Service Repair Manual
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14-114Automatic Transmission
DTC Troubleshooting (cont’d)
OUTPUT SHAFT
(COUNTERSHAFT)
SPEED SENSOR
CONNECTOR
PCM CONNECTOR C (44P)
SG1 (GRN/WHT)
SG1
(GRN/WHT)

Page 1031 of 2893

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14-115
26. Reconnect all connectors.
27. Turn the ignition switch to ON (II).
28. Clear the DTC with the HDS.
29. Start the engine, run the

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14-115
26. Reconnect all connectors.
27. Turn the ignition switch to ON (II).
28. Clear the DTC with the HDS.
29. Start the engine, run the vehicle with the shift lever
in D at speeds over 20 km/h (12 mph) for at least
10 seconds. Slow down and stop the wheels.
30. Check for Temporary DTCs or DTCs with the HDS.
Check for poor connections or loose
terminals between the output shaft (countershaft)
speed sensor and the PCM, then go to step 1.
Go to step 31.
31. Monitor the OBD STATUS for P0721 or P0722 in the DTCs MENU with the HDS.
Troubleshooting is complete. If any other
Temporary DTCs or DTCs were indicated in step 30,
go to the indicated DTC’s troubleshooting.
If the HDS indicates FAILED, check for poor
connections or loose terminals between the output
shaft (countershaft) speed sensor and the PCM,
then go to step 1. If the HDS indicates NOT
COMPLETED, go to step 29.
32. Reconnect all connectors.
33. Update the PCM if it does not have the latest software (see page 11-227), or substitute a known-
good PCM (see page 11-7).
34. Start the engine, run the vehicle with the shift lever in D at speeds over 20 km/h (12 mph) for at least
10 seconds. Slow down and stop the wheels. 35. Check for Temporary DTCs or DTCs with the HDS.
Check for poor connections or loose
terminals between the output shaft (countershaft)
speed sensor and the PCM. If the PCM was updated,
substitute a known-good PCM (see page 11-7), then
go to step 34. If the PCM was substituted, go to step
1.
Go to step 36.
36. Monitor the OBD STATUS for P0721 or P0722 in the DTCs MENU with the HDS.
If the PCM was updated, troubleshooting is
complete. If the PCM was substituted, replace the
original PCM (see page 11-228). If any other
Temporary DTCs or DTCs were indicated in step 35,
go to the indicated DTC’s troubleshooting.
If the HDS indicates FAILED, check for poor
connections or loose terminals between the output
shaft (countershaft) speed sensor and the PCM. If
the PCM was updated, substitute a known-good
PCM(seepage11-7),thengotostep34.IfthePCM
was substituted, go to step 1. If the HDS indicates
NOT COMPLETED, go to step 34.
I s DT C P07 21 or P07 22 i nd i cat ed ?
Does the HDS ind icate PASSED? I s DT C P07 21 or P07 22 i nd i cat ed ?
Does the HDS ind icate PASSED?
08/08/21 14:41:09 61SNR030_140_0117
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Page 1032 of 2893

ACURA CSX 2006 Service Repair Manual
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DTC P0723:
YES
NO
YES
NO YES
NO
14-116Automatic Transmission
DTC Troubleshooting (cont’d)
PCM CONNECTOR C (44P)
LG2 (B

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