Acura RSX Honda Integra. Manual — part 106
S6M6AACK72100090125FAAT00
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−
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DTC P0125:
YES
NO
YES
NO
11-130
PGM-FI System
DTC Troubleshooting (cont’d)
ECT Sensor Malfunction/Slow
Response
(2004 model)
1. Start the engine, and let it idle.
2. Check the ECT with a scan tool or the HDS.
Go to step 3.
Intermittent failure, system is OK at this time.
Check the thermostat and the cooling system.
3. Let it idle for 6 minutes.
4. Check the ECT with a scan tool or the HDS.
Replace the ECT sensor (see page 11-280).
Intermittent failure, system is OK at this time.
Check the thermostat and the cooling system.
Is about 86 °F ( 30 °C) or less, or 2.61 V or mor e
indicated?
Is about 86 °F ( 30 °C) or less, or 2.61 V or mor e
indicated?
05/06/27 17:34:19 61S6M040_110_0130
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S6M6AALK72100090125FAAT00
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−
−
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−
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DTC P0125:
YES
NO
YES
NO
YES
NO
YES
NO
11-131
ECT Sensor Malfunction/Slow
Response
(2005-2006 models)
1. Start the engine, and let it idle.
2. Check the ECT SENSOR in the DATA LIST with the
HDS.
Go to step 3.
Intermittent failure, system is OK at this time.
Check the thermostat and the cooling system.
3. Let the engine idle for 6 minutes.
4. Check the ECT SENSOR in the DATA LIST with the
HDS.
Go to step 5.
Intermittent failure, system is OK at this time.
Check the thermostat and the cooling system.
5. Turn the ignition switch OFF.
6. Replace the ECT sensor (see page 11-280).
7. Turn the ignition switch ON (II).
8. Reset the ECM/PCM with the HDS.
9. Do the ECM/PCM idle learn procedure (see page
11-349).
10. Allow the engine to cool to between 23 °F (
5 °C)
and 77 °F (25 °C).
11. Start the engine, and let it idle for 20 minutes.
12. Check for Temporary DTCs or DTCs with the HDS.
If DTC P0125 is indicated, check for poor
connections or loose terminals at the ECT sensor
and the ECM/PCM, then go to step 1. If any other
Temporary DTCs or DTCs are indicated, go to the
indicated DTC’s troubleshooting.
Go to step 13.
13. Monitor the OBD STATUS for DTC P0125 in the
DTCs MENU with the HDS.
Troubleshooting is complete.
If the screen indicates FAILED, check for poor
connections or loose terminals at the ECT sensor
and the ECM/PCM, then go to step 1. If the screen
indicates NOT COMPLETED, go to step 10 and
recheck.
Is about 86 °F ( 30 °C) or less, or 2.61 V or mor e
indicated?
Is about 86 °F ( 30 °C) or less, or 2.61 V or mor e
indicated?
Ar e any T empor ar y DT Cs or DT Cs indicated?
Does the scr een indicate PASSED?
05/06/27 17:34:19 61S6M040_110_0131
S6M6AAJK72100090128FAAT10
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−
−
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DTC P0128:
YES
NO
YES
NO
11-132
PGM-FI System
DTC Troubleshooting (cont’d)
Cooling System Malfunction
(2002-2004 models)
NOTE: If the DTCs listed below are stored at the same
time as DTC P0128, troubleshoot those DTCs first, then
recheck for P0128.
P0107, P0108, P1128, P1129: Manifold absolute
pressure (MAP) sensor
P1106, P1107, P1108 (P2227, P2228, P2229) :
Barometric pressure (BARO) sensor
P1259 (P2646, P2647) : VTEC system
P0116, P0117, P0118 (P0125) : Engine coolant
temperature (ECT) sensor
P0112, P0113: Intake air temperature (IAT) sensor
P0500: Vehicle speed sensor (VSS)
P0335, P0336 (P0339) : Crankshaft position (CKP)
sensor
P0300: Random misfire detected
P0301, P0302, P0303, P0304: No. 1, No. 2, No. 3 or No. 4
cylinder misfire detected
P0505 (P0506, P0507) : Idle control system malfunction
P1519 (P0511) : Idle air control (IAC) valve
: 2004 model
DTC P0128 can occasionally set when the hood is
opened while the engine is running.
1. Check the engine coolant level.
Refill the engine coolant. If necessary, repair
the coolant leak.
Go to step 2.
2. Turn the ignition switch ON (II), and make sure the
A/C is off.
3. Check the radiator fan.
Check the radiator fan circuit (see page
10-15), the radiator fan switch circuit open
(see page 10-18), the radiator fan switch circuit
short (see page 10-18), and the radiator fan switch
(see page 10-19). If they are OK, update the ECM/
PCM if it does not have the latest software, or
substitute a known-good ECM/PCM (see page 11-6),
then recheck. If the symptom/indication goes away
with a known-good ECM/PCM, replace the original
ECM/PCM (see page 11-284).
Replace the thermostat (see page 10-8).
Is the engine coolant level low?
Does the r adiator f an r un continuously?
05/06/27 17:34:19 61S6M040_110_0132
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S6M6AALK72100090128FAAT10
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−
−
−
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DTC P0128:
YES
NO
YES
NO
YES
NO
11-133
Cooling System Malfunction
(2005-2006 models)
NOTE: If the DTCs listed below are stored at the same
time as DTC P0128, troubleshoot those DTCs first, then
recheck for P0128.
P0112, P0113: Intake air temperature (IAT) sensor
P0116, P0117, P0118, P0125: Engine coolant
temperature (ECT) sensor
P0300: Random misfire detected
P0301, P0302, P0303, P0304: No.1, No. 2, No. 3, or No. 4
cylinder misfire detected
P0335, P0339: Crankshaft position (CKP) sensor
P2227, P2228, P2229: Barometric pressure (BARO)
sensor
P2646, P2647, P2648, P2649: VTEC system
P0506, P0507: Idle control system malfunction
DTC P0128 can occasionally set when the hood is
opened while the engine is running.
1. Turn the ignition switch ON (II).
2. Clear the DTC with the HDS.
3. Turn the blower switch OFF.
4. Turn the A/C switch OFF.
5. Check the FAN CTRL in the DATA LIST with the
HDS.
Go to step 6.
Wait until the FAN CTRL is turned off, then go
to step 6.
6. Check the ECT SENSOR in the DATA LIST with the
HDS, then check the radiator fan operation.
Check the radiator fan circuit (see page
10-15), the radiator fan switch circuit open
(see page 10-18), the radiator fan switch circuit
short (see page 10-18), and the radiator fan switch
(see page 10-19). If the circuits and the switch are
OK, go to step 22.
Go to step 7.
7. Start the engine. Hold the engine speed at
3,000 rpm without load (in Park or neutral) until the
radiator fan comes on, then let it idle.
8. Turn the ignition switch OFF.
9. Turn the ignition switch ON (II).
10. Do the RADIATOR FAN TEST in the INSPECTION
MENU with the HDS for 20 minutes.
11. Check the ECT SENSOR in the DATA LIST with the
HDS.
Intermittent failure, system is OK at this
time.
Go to step 12.
12. Turn the ignition switch OFF.
13. Cool down the engine until the coolant temperature
is between 21 °F (
6 °C) and 104 °F (40 °C).
14. Replace the thermostat (see page 10-8).
15. Turn the ignition switch ON (II).
16. Reset the ECM/PCM with the HDS.
17. Do the ECM/PCM idle learn procedure (see page
11-349).
(cont’d)
Is it OF F ?
Does the r adiator f an keep r unning when the
engine coolant temper atur e is less than 158 °F
( 7 0 °C)?
Is about 151 °F ( 66 °C) or less, or 1.25 V or mor e
indicated?
05/06/27 17:34:19 61S6M040_110_0133
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