Acura CSX. Manual — part 113
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DTC P0325:
11-126
11-126
PGM-FI System
ECM/PCM CONNECTOR C (44P)
KS (RED/BLU)
72. Check for Temporary DTCs or DTCs with the HDS.
Check for poor connections or loose
terminals at the ignition coil(s), the injector(s), and
the ECM/PCM. If the ECM/PCM was updated,
substitute a known-good ECM/PCM (see page 11-7),
then go to step 71. If the ECM/PCM was substituted,
go to step 1.
Go to step 73.
73. Monitor the OBD STATUS for DTC P0301, P0302,
P0303, or P0304 in the DTCs MENU with the HDS.
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 were indicated in step 72, go to the indicated
DTC’s troubleshooting.
If the screen indicates FAILED, check for poor
connections or loose terminals at the ignition coil,
the injector, and the ECM/PCM. If the ECM/PCM
was updated, substitute a known-good ECM/PCM
(see page 11-7), then go to step 71. If the ECM/PCM
was substituted, go to step 1. If the screen indicates
EXECUTING, keep driving until a result comes on. If
the screen indicates OUT OF CONDITION, go to
step 71.
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. Start the engine. Hold the engine speed between
3,000 rpm without load (A/T in P or N, M/T in
neutral) until the radiator fan comes on, then let it
idle.
4. Hold the engine speed between 3,000
4,000 rpm
for at least 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 knock sensor and the ECM/PCM.
6. Turn the ignition switch to LOCK (0).
7. Jump the SCS line with the HDS.
8. Disconnect the knock sensor 1P connector
(see page 11-223).
9. Disconnect ECM/PCM connector C (44P).
10. Check for continuity between ECM/PCM connector
terminal C42 and body ground.
Knock Sensor Circuit Malfunction
Terminal side of female terminals
Is DT C P0301, P0302, P0303, or P0304
indicated?
Does the scr een indicate PASSED?
Is DT C P0325 indicated?
08/08/21 14:18:52 61SNR030_110_0126
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11-127
KNOCK SENSOR 1P CONNECTOR
JUMPER WIRE
KS (RED/BLU)
ECM/PCM CONNECTOR C (44P)
KS (RED/BLU)
Repair short in the wire between the ECM/
PCM (C42) and the knock sensor, then go to step 14.
Go to step 11.
11. Connect the knock sensor 1P connector terminal to
body ground with a jumper wire.
12. Check for continuity between ECM/PCM connector
terminal C42 and body ground.
Go to step 13.
Repair open in the wire between the ECM/
PCM (C42) and the knock sensor, then go to step 14.
13. Replace the knock sensor (see page 11-223).
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. Hold the engine speed between 3,000
4,000 rpm
for at least 10 seconds.
19. Check for Temporary DTCs or DTCs with the HDS.
Go to step 21.
Go to step 20.
20. Monitor the OBD STATUS for DTC P0325 in the
DTCs MENU with the HDS.
Troubleshooting is complete. If any other
Temporary DTCs or DTCs were indicated in step 19,
go to the indicated DTC’s troubleshooting.
If the screen indicates FAILED, check for poor
connections or loose terminals at the knock sensor
and the ECM/PCM, then go to step 1. If the screen
indicates NOT COMPLETED, go to step 18.
Wire side of female terminals
Terminal side of female terminals
Is ther e continuity?
Is ther e continuity?
Is DT C P0325 indicated?
Does the scr een indicate PASSED?
08/08/21 14:18:53 61SNR030_110_0127
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DTC P0335:
11-128
11-128
PGM-FI System
CKP SENSOR 3P CONNECTOR
IGP (YEL/BLK)
21. 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).
22. Hold the engine speed between 3,000
4,000 rpm
for at least 10 seconds.
23. Check for Temporary DTCs or DTCs with the HDS.
Check for poor connections or loose
terminals at the knock 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 22.
If the ECM/PCM was substituted, go to step 1.
Go to step 24.
24. Monitor the OBD STATUS for DTC P0325 in the
DTCs MENU with the HDS.
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 were indicated in step 23, go to the indicated
DTC’s troubleshooting.
If the screen indicates FAILED, check for poor
connections or loose terminals at the knock 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 22. If the ECM/PCM was substituted,
go to step 1. If the screen indicates NOT
COMPLETED, go to step 22.
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. Start the engine.
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 CKP sensor and the ECM/PCM.
5. Turn the ignition switch to LOCK (0).
6. Disconnect the CKP sensor 3P connector.
7. Turn the ignition switch to ON (II).
8. Measure the voltage between CKP sensor 3P
connector terminal No. 3 and body ground.
Go to step 9.
Repair open in the wire between the CKP
sensor and PGM-FI main relay 1, then go to step 19.
CKP Sensor No Signal
Wire side of female terminals
Is DT C P0325 indicated?
Does the scr een indicate PASSED?
Is DT C P0335 indicated?
Is ther e batter y voltage?
08/08/21 14:18:53 61SNR030_110_0128
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11-129
CKP SENSOR 3P CONNECTOR
CKP (BLU/YEL)
CKP SENSOR 3P CONNECTOR
IGP (YEL/BLK)
LG (BRN/YEL)
ECM/PCM CONNECTOR C (44P)
CKP (BLU/YEL)
CKP SENSOR 3P CONNECTOR
CKP (BLU/YEL)
JUMPER WIRE
9. Measure the voltage between CKP sensor 3P
connector terminal No. 1 and body ground.
Go to step 10.
Go to step 11.
10. Measure the voltage between CKP sensor 3P
connector terminals No. 2 and No. 3.
Go to step 17.
Repair open in the wire between the CKP
sensor and G101; A/T model (see page 22-16), M/T
model (see page 22-18), then go to step 19.
11. Turn the ignition switch to LOCK (0).
12. Jump the SCS line with the HDS.
13. Disconnect ECM/PCM connector C (44P).
14. Check for continuity between ECM/PCM connector
terminal C32 and body ground.
Repair short in the wire between the ECM/
PCM (C32) and the CKP sensor, then go to step 19.
Go to step 15.
15. Connect CKP sensor 3P connector terminal No. 1 to
body ground with a jumper wire.
Wire side of female terminals
Wire side of female terminals
Terminal side of female terminals
Wire side of female terminals
Is ther e about 5 V ?
Is ther e batter y voltage?
Is ther e continuity?
08/08/21 14:18:54 61SNR030_110_0129
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