ACURA CSX 2006 Service Repair Manual


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DTC P2127:
11-25711-257
APP SENSOR 6P CONNECTOR
SG5 (LT BLU) VCC5 (GRY)
12. Turn the ignition switch to LOCK (0).
13. Replace the accelerator pedal module; K20Z2engine (see page 11-269), K20Z3 engine (see page
11-270).
14. Reconnect all connectors.
15. Turn the ignition switch to ON (II).
16. Reset the ECM/PCM with the HDS.
17. Do the ECM/PCM idle learn procedure (see page 11-310).
18. Check for Temporary DTCs or DTCs with the HDS.
Check for poor connections or loose
terminals at the APP sensor and the ECM/PCM,
then go to step 1.
Troubleshooting is complete. If any other
Temporary DTCs or DTCs are indicated, go to the
indicated DTC’s troubleshooting.
19. Reconnect all connectors.
20. 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).
21. Check for Temporary DTCs or DTCs with the HDS.
Check for poor connections or loose
terminals at the APP sensor and the ECM/PCM. If
the ECM/PCM was updated, substitute a known-
good ECM/PCM (see page 11-7), then recheck. If the
ECM/PCM was substituted, go to step 1.
If the ECM/PCM was updated, troubleshooting
is complete. If the ECM/PCM was substituted,
replace the original ECM/PCM (see page 11-228). If
any other Temporary DTCs or DTCs are indicated,
go to the indicated DTC’s troubleshooting. NOTE: Before you troubleshoot, record all freeze data
and any on-board snapshot, and review the general
troubleshooting information (see page 11-3).
1. Turn the ignition switch to ON (II).
2. Check APP SENSOR B in the DATA LIST with the HDS.
Go to step 3.
Intermittent failure, the system is OK at this
time. Check for poor connections or loose terminals
at the APP sensor and the ECM/PCM.
3. Turn the ignition switch to LOCK (0).
4. Disconnect the APP sensor 6P connector.
5. Turn the ignition switch to ON (II).
6. Measure the voltage between APP sensor 6P connector terminals No. 5 and No. 6.
Go to step 7.
Go to step 17.
(cont’d)APP Sensor B (TP Sensor E)
Circuit Low Voltage
Wire side of female terminals
Is DT C P2123 indicated?
Is DT C P2123 indicated? Is t her e about 0.2 V or l ess?
Is t her e about 5 V ?
08/08/21 14:26:47 61SNR030_110_0257
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11-258Electronic Throttle Control System
DTC Troubleshooting (cont’d)
APP SENSOR 6P CONNECTOR
APSB (PUR)
APP SENSOR 6P CONNECTOR APSB (PUR)
JUMPER WIRE ECM/PCM CONNECTOR A (44P)
APSB (PUR)
APP SENSOR 6P CONNECTOR VCC5 (GRY)
JUMPER WIRE
APSB (PUR)
7. Turn the ignition switch to LOCK (0).
8. Jump the SCS line with the HDS.
9. Disconnect ECM/PCM connector A (44P).
10. Check for continuity between APP sensor 6P connector terminal No. 4 and body ground.
Repair short in the wire between the ECM/
PCM (A18) and the APP sensor, then go to step 24.
Go to step 11.
11. Connect APP sensor 6P connector terminal No. 4 to body ground with a jumper wire. 12. Check for continuity between ECM/PCM connector
terminal A18 and body ground.
Go to step 13.
Repair open in the wire between the ECM/
PCM (A18) and the APP sensor, then go to step 24.
13. Reconnect ECM/PCM connector A (44P).
14. Connect APP sensor 6P connector terminals No. 4 andNo.6withajumperwire.
Wire side of female terminals
Wire side of female terminals Terminal side of female terminals
Wire side of female terminals
Is there continuity? Is there continuity?
08/08/21 14:26:48 61SNR030_110_0258
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DYNOMITE -2009-


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11-259
APP SENSOR 6P CONNECTORVCC5 (GRY)
JUMPER WIRE ECM/PCM CONNECTOR A (44P)
VCC5
(GRY)
15. Turn the ignition switch to ON (II).
16. Check APP SENSOR B in the DATA LIST with theHDS.
Go to step 29.
Go to step 22.
17. Turn the ignition switch to LOCK (0).
18. Jump the SCS line with the HDS.
19. Disconnect ECM/PCM connector A (44P).
20. Connect APP sensor 6P connector terminal No. 6 to body ground with a jumper wire. 21. Check for continuity between ECM/PCM connector
terminal A24 and body ground.
Go to step 30.
Repair open in the wire between the ECM/
PCM (A24) and the APP sensor, then go to step 24.
22. Turn the ignition switch to LOCK (0).
23. Replace the accelerator pedal module; K20Z2 engine (see page 11-269), K20Z3 engine (see page
11-270).
24. Reconnect all connectors.
25. Turn the ignition switch to ON (II).
26. Reset the ECM/PCM with the HDS.
27. Do the ECM/PCM idle learn procedure (see page 11-310).
28. Check for Temporary DTCs or DTCs with the HDS.
Check for poor connections or loose
terminals at the APP sensor and the ECM/PCM,
then go to step 1.
Troubleshooting is complete. If any other
Temporary DTCs or DTCs are indicated, go to the
indicated DTC’s troubleshooting.
(cont’d)
Wire side of female terminals Terminal side of female terminals
Is t her e about 0.2 V or l ess?
Is there continuity?
Is DT C P2127 indicated?
08/08/21 14:26:48 61SNR030_110_0259
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DYNOMITE -2009-


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NO
DTC P2128:
11-26011-260Electronic Throttle Control System
DTC Troubleshooting (cont’d)
APP SENSOR 6P CONNECTOR
SG5 (LT BLU) VCC5 (GRY)
29. Turn the ignition switch to LOCK (0).
30. Reconnect all connectors.
31. Update the ECM/PCM if it does not have the latestsoftware (see page 11-227), or substitute a known-
good ECM/PCM (see page 11-7).
32. Check for Temporary DTCs or DTCs with the HDS.
Check for poor connections or loose
terminals at the APP sensor and the ECM/PCM. If
the ECM/PCM was updated, substitute a known-
good ECM/PCM (see page 11-7), then recheck. If the
ECM/PCM was substituted, go to step 1.
If the ECM/PCM was updated, troubleshooting
is complete. If the ECM/PCM was substituted,
replace the original ECM/PCM (see page 11-228). If
any other Temporary DTCs or DTCs are indicated,
go to the indicated DTC’s troubleshooting. NOTE: Before you troubleshoot, record all freeze data
and any on-board snapshot, and review the general
troubleshooting information (see page 11-3).
1. Turn the ignition switch to ON (II).
2. Check APP SENSOR B in the DATA LIST with the HDS.
Go to step 3.
Intermittent failure, the system is OK at this
time. Check for poor connections or loose terminals
at the APP sensor and the ECM/PCM.
3. Turn the ignition switch to LOCK (0).
4. Disconnect the APP sensor 6P connector.
5. Turn the ignition switch to ON (II).
6. Measure the voltage between APP sensor 6P connector terminals No. 5 and No. 6.
Go to step 12.
Go to step 7.APP Sensor B (TP Sensor E)
Circuit High Voltage
Wire side of female terminals
Is DT C P2127 indicated?
Is t her e about 4.9 V or mor e?
Is t her e about 5 V ?
08/08/21 14:26:48 61SNR030_110_0260
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DYNOMITE -2009-


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11-261
APP SENSOR 6P CONNECTOR
SG5 (LT BLU)
JUMPER WIRE
ECM/PCM CONNECTOR A (44P) SG5 (LT BLU)
7. Turn the ignition switch to LOCK (0).
8. Jump the SCS line with the HDS.
9. Disconnect ECM/PCM connector A (44P).
10. Connect APP sensor 6P connector terminal No. 5 to body ground with a jumper wire.
11. Check for continuity between ECM/PCM connector terminal A34 and body ground.
Go to step 19.
Repair open in the wire between the ECM/
PCM (A34) and the APP sensor, then go to step 14. 12. Turn the ignition switch to LOCK (0).
13. Replace the accelerator pedal module; K20Z2
engine (see page 11-269), K20Z3 engine (see page
11-270).
14. Reconnect all connectors.
15. Turn the ignition switch to ON (II).
16. Reset the ECM/PCM with the HDS.
17. Do the ECM/PCM idle learn procedure (see page 11-310).
18. Check for Temporary DTCs or DTCs with the HDS.
Check for poor connections or loose
terminals at the APP sensor and the ECM/PCM,
then go to step 1.
Troubleshooting is complete. If any other
Temporary DTCs or DTCs are indicated, go to the
indicated DTC’s troubleshooting.
19. Reconnect all connectors.
20. 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).
21. Check for Temporary DTCs or DTCs with the HDS.
Check for poor connections or loose
terminals at the APP sensor and the ECM/PCM. If
the ECM/PCM was updated, substitute a known-
good ECM/PCM (see page 11-7), then recheck. If the
ECM/PCM was substituted, go to step 1.
If the ECM/PCM was updated, troubleshooting
is complete. If the ECM/PCM was substituted,
replace the original ECM/PCM (see page 11-228). If
any other Temporary DTCs or DTCs are indicated,
go to the indicated DTC’s troubleshooting.
Wire side of female terminals
Terminal side of female terminals
Is there continuity? Is DT C P2128 indicated?
Is DT C P2128 indicated?
08/08/21 14:26:49 61SNR030_110_0261
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DYNOMITE -2009-


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DTC P2135:
YES
NO
YES
NO YES
NO
11-262Electronic Throttle Control System
DTC Troubleshooting (cont’d)
ECM/PCM CONNECTOR C (44P)
TPSB (RED/BLU)
TPSA
(RED/BLK)
TP Sensor A/B Incorrect Voltage
Correlation
Do not insert your fingers into the installed throttle
body when you turn the ignition switch to ON (II) or
while the ignition switch is ON (II). If you do, you
will seriously injure your fingers if the throttle valve
is activated.
NOTE: Before you troubleshoot, record all freeze data
and any on-board snapshot, and review the general
troubleshooting information (see page 11-3). 1. Turn the ignition switch to ON (II).
2. Clear the DTC with the HDS.
3. Do the ETCS TEST in the INSPECTION MENU with the HDS.
4. Check for Temporary DTCs or DTCs with the HDS.
Go to step 5.
Intermittent failure, the system is OK at this
time. Check for poor connections or loose terminals
at the throttle body and the ECM/PCM.
5. Turn the ignition switch to LOCK (0).
6. Disconnect the intake air duct from the throttle body; K20Z2 engine (see page 11- 348), K20Z3
engine (see page 11-349).
7. Turn the ignition switch to ON (II).
8. Visually check the throttle valve operation while you clear the DTC with the HDS.
Go to step 15.
Go to step 9. 9. Turn the ignition switch to LOCK (0).
10. Jump the SCS line with the HDS.
11. Disconnect ECM/PCM connector C (44P).
12. Check for continuity between ECM/PCM connector terminals C20 and C21.
Go to step 13.
Go to step 22.
Terminal side of female terminals
Is DTC P2135 indicated?
Does the valve temporarily move to its f ullycl osed posi t i on? Is there continuity?
08/08/21 14:26:49 61SNR030_110_0262
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DYNOMITE -2009-

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11-263
ECM/PCM CONNECTOR C (44P)
TPSB (RED/BLU)
TPSA
(RED/BLK)
13. Disconnect the throttle body 6P connector.
14. Check for continuity between ECM/PCM connector terminals C20 and C21.
Repair short in the wires between ECM/PCM
connector terminals C20 (TPSA line) and C21 (TPSB
line),thengotostep17.
Go to step 15.
15. Turn the ignition switch to LOCK (0).
16. Replace the throttle body; K20Z2 engine (see page 11-348), K20Z3 engine (see page 11-349).
17. Reconnect all connectors.
18. Turn the ignition switch to ON (II).
19. Reset the ECM/PCM with the HDS.
20. Do the ECM/PCM idle learn procedure (see page 11-310).
21. Check for Temporary DTCs or DTCs with the HDS.
Check for poor connections or loose
terminals at the throttle body and the ECM/PCM,
then go to step 1.
Troubleshooting is complete. If any other
Temporary DTCs or DTCs are indicated, go to the
indicated DTC’s troubleshooting. 22. Reconnect all connectors.
23. 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).
24. Check for Temporary DTCs or DTCs with the HDS.
Check for poor connections or loose
terminals at the throttle body and the ECM/PCM. If
the ECM/PCM was updated, substitute a known-
good ECM/PCM (see page 11-7), then recheck. If the
ECM/PCM was substituted, go to step 1.
If the ECM/PCM was updated, troubleshooting
is complete. If the ECM/PCM was substituted,
replace the original ECM/PCM (see page 11-228). If
any other Temporary DTCs or DTCs are indicated,
go to the indicated DTC’s troubleshooting.
Terminal side of female terminals
Is there continuity?
Is DTC P2135 indicated? Is DTC P2135 indicated?
08/08/21 14:26:49 61SNR030_110_0263
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DYNOMITE -2009-



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DTC P2138:
YES
NO
YES
NO YES
NO
YES
NO
11-264Electronic Throttle Control System
DTC Troubleshooting (cont’d)
ECM/PCM CONNECTOR A (44P)
APSB (PUR)
APSA (YEL)
ECM/PCM CONNECTOR A (44P) APSB (PUR)
APSA (YEL)
APP Sensor A/B (TP Sensor D/E)
Incorrect Voltage Correlation
NOTE: Before you troubleshoot, record all freeze data
and any on-board snapshot, and review the general
troubleshooting information (see page 11-3).
1. Turn the ignition switch to ON (II).
2. Clear the DTC with HDS.
3. Press the accelerator pedal to the floor.
4. Check for Temporary DTCs or DTCs with the HDS.
Go to step 5.
Intermittent failure, the system is OK at this
time. Check for poor connections or loose terminals
at the APP sensor and the ECM/PCM.
5. Check APP SENSOR A and APP SENSOR B in the DATA LIST with the HDS.
Go to step 6.
Go to step 12.
6. Turn the ignition switch to LOCK (0).
7. Jump the SCS line with the HDS.
8. Disconnect ECM/PCM connector A (44P). 9. Check for continuity between ECM/PCM connector
terminals A17 and A18.
Go to step 10.
Go to step 22.
10. Disconnect the APP sensor 6P connector.
11. Check for continuity between ECM/PCM connector terminals A17 and A18.
Repair short in the wires between the ECM/
PCM A17 (APSA line) and A18 (APSB line), then go
to step 14.
Go to step 13.
Terminal side of female terminals
Terminal side of female terminalsIs DTC P2138 indicated?
Ar e t hey t he same v ol t age? Is there continuity?
Is there continuity?
08/08/21 14:26:50 61SNR030_110_0264
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11-265
12. Turn the ignition switch to LOCK (0).
13. Replace the accelerator pedal module; K20Z2
engine (see page 11-269), K20Z3 engine (see page
11-270).
14. Reconnect all connectors.
15. Turn the ignition switch to ON (II).
16. Reset the ECM/PCM with the HDS.
17. Do the ECM/PCM idle learn procedure (see page 11-310).
18. Turn the ignition switch to LOCK (0).
19. Turn the ignition switch to ON (II).
20. Press the accelerator pedal to the floor.
21. Check for Temporary DTCs or DTCs with the HDS.
Check for poor connections or loose
terminals at the APP sensor and the ECM/PCM,
then go to step 1.
Troubleshooting is complete. If any other
Temporary DTCs or DTCs are indicated, go to the
indicated DTC’s troubleshooting. 22. Reconnect all connectors.
23. 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).
24. Turn the ignition switch to LOCK (0).
25. Turn the ignition switch to ON (II).
26. Press the accelerator pedal to the floor.
27. Check for Temporary DTCs or DTCs with the HDS.
Check for poor connections or loose
terminals at the APP sensor and the ECM/PCM. If
the ECM/PCM was updated, substitute a known-
good ECM/PCM (see page 11-7), then go to step 23.
If the ECM/PCM was substituted, go to step 1.
If the ECM/PCM was updated, troubleshooting
is complete. If the ECM/PCM was substituted,
replace the original ECM/PCM (see page 11-228). If
any other Temporary DTCs or DTCs are indicated,
go to the indicated DTC’s troubleshooting.
Is DTC P2138 indicated? Is DTC P2138 indicated?
08/08/21 14:26:50 61SNR030_110_0265
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DTC P2176:
YES
NO YES
NO
YES
NO
11-266Electronic Throttle Control System
DTC Troubleshooting (cont’d)
THROTTLE BODY 6P CONNECTOR
ETCSM
(GRN/YEL) ETCSM
(BLU/RED)
JUMPER WIRE
Throttle Actuator Control System
Idle Position Not Learned
Do not insert your fingers into the installed throttle
body when you turn the ignition switch to ON (II) or
while the ignition switch is ON (II). If you do, you
will seriously injure your fingers if the throttle valve
is activated.
NOTE:  Before you troubleshoot, record all freeze data and any on-board snapshot, and review the general
troubleshooting information (see page 11-3).
 If DTC P2135 is stored at the same time as DTC P2176, troubleshoot DTC P2135 first, then recheck for DTC
P2176.
1. Turn the ignition switch to ON (II).
2. Clear the DTC with the HDS.
3. Turn the ignition switch to LOCK (0).
4. Turn the ignition switch to ON (II), and wait 10 seconds.
5. Check for Temporary DTCs or DTCs with the HDS.
Go to step 6.
Intermittent failure, the system is OK at this
time. Check for poor connections or loose terminals
at the throttle body and the ECM/PCM, then clean
the throttle body (see page 11- 344).
6. Turn the ignition switch to LOCK (0).
7. Disconnect the intake air duct from the throttle body; K20Z2 engine (see page 11- 348), K20Z3
engine (see page 11-349).
8. Turn the ignition switch to ON (II).
9. Clear the DTC with the HDS. 10. Visually check the throttle valve operation while
doing the ETCS TEST in the INSPECTION MENU
with the HDS.
Go to step 11.
Go to step 12.
11. Check for sludge or carbon on the throttle valve.
Clean the throttle body (see page 11-344),
then go to step 21 and recheck.
Go to step 18.
12. Turn the ignition switch to LOCK (0).
13. Disconnect the throttle body 6P connector.
14. Jump the SCS line with the HDS.
15. Disconnect ECM/PCM connector C (44P).
16. Connect throttle body 6P connector terminals No. 5 andNo.6withajumperwire.
Wire side of female terminals
Is DTC P2176 indicated? Does the throttle valve move to its f ully closed
posi t i on?
Is there sludge or carbon on the throttle valve?
08/08/21 14:26:50 61SNR030_110_0266
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DYNOMITE -2009-