Acura CSX. Manual — part 147
02
03
−
−
−
−
−
−
YES
NO
YES
NO
YES
NO
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 ther e continuity?
Is DT C P2128 indicated?
Is DT C P2128 indicated?
08/08/21 14:26:49 61SNR030_110_0261
01
SNR9AA7K72100092135FAAT30
−
−
−
−
−
−
DTC P2135:
YES
NO
YES
NO
YES
NO
11-262
Electronic Throttle Control System
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 DT C P2135 indicated?
Does the valve tempor ar ily move to its f ully
closed position?
Is ther e continuity?
08/08/21 14:26:49 61SNR030_110_0262
02
−
−
−
−
−
−
YES
NO
YES
NO
YES
NO
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), then go to step 17.
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 ther e continuity?
Is DT C P2135 indicated?
Is DT C P2135 indicated?
08/08/21 14:26:49 61SNR030_110_0263
01
01
SNR9AA7K72100092138FAAT30
−
−
−
−
−
−
−
−
DTC P2138:
YES
NO
YES
NO
YES
NO
YES
NO
11-264
Electronic Throttle Control System
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 terminals
Is DT C P2138 indicated?
Ar e they the same voltage?
Is ther e continuity?
Is ther e continuity?
08/08/21 14:26:50 61SNR030_110_0264
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