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Acura RSX Honda Integra. Manual - part 100

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DTC P0111:

DTC P1116:

YES

11-106

PGM-FI System

DTC Troubleshooting (cont’d)

IAT Sensor Circuit Range/

Performance Problem
(2005-2006 models)

ECT Sensor Circuit Range/

Performance Problem
(2005-2006 models)

1. Check for poor connections or loose terminals at

the ECT sensor and the IAT sensor.

Go to step 2.

Repair the connectors or terminals, then go to

step 25.

2. Start the engine, and let it idle for 10 minutes.

3. Check the ECT SENSOR in the DATA LIST with the

HDS.

Replace the ECT sensor (see page 11-280),

then go to step 25.

Go to step 4.

4. Turn the ignition switch OFF.

5. Remove the IAT sensor (see page 11-281).

6. Allow the IAT sensor to cool to 77 °F (25 °C).

7. Note the ambient temperature.

8. Connect the IAT sensor to the 2P connector. Do not

install the sensor on the air intake duct.

9. Turn the ignition switch ON (II).

10. Note the value of the IAT SENSOR quickly in the

DATA LIST with the HDS.

11. Compare the IAT SENSOR and the ambient

temperature.

Replace the IAT sensor (see page 11-281),

then go to step 25.

Go to step 12.

12. Disconnect the IAT sensor from the 2P connector.

13. Using a heat gun, blow hot air on the IAT sensor for

a few seconds. Do not apply the heat longer than a
few seconds or you will damage the sensor.

14. Connect the IAT sensor to the 2P connector. Do not

install the sensor on the air intake duct.

15. Check the IAT SENSOR in the DATA LIST with the

HDS.

Go to step 16.

Replace the IAT sensor (see page 11-281),

then go to step 25.

Ar e the connections and ter minals OK ?

Is about 129 °F ( 54 °C) or less, or 1.54 V or mor e
indicated?

Does the IAT SENSOR dif f er 5.4 °F ( 3 °C) or
mor e?

Does the IAT SENSOR change 82 °F ( 28 °C) or
mor e?

05/06/27 17:33:37 61S6M040_110_0106

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YES

11-107

16. Turn the ignition switch OFF.

17. Drain the coolant (see page 10-6).

18. Remove the ECT sensor (see page 11-280).

19. Allow the ECT sensor to cool to 77 °F (25 °C).

20. Note the ambient temperature.

21. Connect the ECT sensor to the 2P connector. Do not

install the sensor on the engine.

22. Turn the ignition switch ON (II).

23. Note the value of ECT SENSOR quickly in the DATA

LIST with the HDS.

24. Compare the ECT SENSOR and the ambient

temperature.

Replace the ECT sensor (see page 11-280),

then go to step 25.

Intermittent failure, system is OK at this time.

Check for poor connections or loose terminals at
the ECT sensor and the ECM/PCM.

25. Turn the ignition switch ON (II).

26. Reset the ECM/PCM with the HDS.

27. Do the ECM/PCM idle learn procedure (see page

11-349).

28. Check for Temporary DTCs or DTCs with the HDS.

If DTC P0111 and/or P1116 is indicated, check

for poor connections or loose terminals at the ECT
sensor, or the IAT 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.

Troubleshooting is complete.

Does the ECT SENSOR dif f er 5.4 °F ( 3 °C) or
mor e?

Ar e any T empor ar y DT Cs or DT Cs indicated?

05/06/27 17:33:37 61S6M040_110_0107

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DTC P0112:

YES

11-108

PGM-FI System

DTC Troubleshooting (cont’d)

IAT SENSOR 2P CONNECTOR

IAT
(RED/YEL)

IAT Sensor Circuit Low Voltage

(2002-2004 models)

1. Turn the ignition switch ON (II).

2. Check the IAT with a scan tool or the HDS.

Go to step 3.

Go to step 10.

3. Turn the ignition switch OFF.

4. Disconnect the IAT sensor 2P connector.

5. Turn the ignition switch ON (II).

6. Check the IAT with a scan tool or the HDS.

Go to step 7.

Replace the IAT sensor (see page 11-281).

7. Turn the ignition switch OFF.

8. Disconnect ECM/PCM connector B (24P).

9. Check for continuity between IAT sensor 2P

connector terminal No. 2 and body ground.

Repair short in the wire between the ECM/

PCM (B17) and the IAT sensor.

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).

10. Check the temperature reading on a scan tool or

the HDS. Be aware that if the engine is warm, the
reading will be higher than ambient temperature. If
the engine is cold, the IAT and ECT will have the
same value.

Intermittent failure, system is OK at this time.

Check for poor connections or loose terminals at
the IAT sensor and the ECM/PCM.

Replace the IAT sensor (see page 11-281).

Wire side of female terminals

Is 302 °F ( 150 °C) or higher , or 0 V indicated?

Is ther e continuity?

Is the cor r ect ambient temper atur e indicated?

05/06/27 17:33:37 61S6M040_110_0108

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−

DTC P0112:

YES

11-109

IAT SENSOR 2P CONNECTOR

IAT
(RED/YEL)

IAT Sensor Circuit Low Voltage

(2005-2006 models)

1. Turn the ignition switch ON (II).

2. Check the IAT SENSOR in the DATA LIST with the

HDS.

Go to step 3.

Intermittent failure, system is OK at this time.

Check for poor connections or loose terminals at
the IAT sensor and the ECM/PCM.

3. Turn the ignition switch OFF.

4. Disconnect the IAT sensor 2P connector.

5. Turn the ignition switch ON (II).

6. Check the IAT SENSOR in the DATA LIST with the

HDS.

Go to step 7.

Go to step 11.

7. Turn the ignition switch OFF.

8. Jump the SCS line with the HDS.

9. Disconnect ECM/PCM connector B (24P).

10. Check for continuity between IAT sensor 2P

connector terminal No. 2 and body ground.

Repair short in the wire between the IAT

sensor and the ECM/PCM (B17), then go to step 13.

Go to step 18.

11. Turn the ignition switch OFF.

12. Replace the IAT sensor (see page 11-281).

13. Reconnect all connectors.

14. Turn the ignition switch ON (II).

15. Reset the ECM/PCM with the HDS.

16. Do the ECM/PCM idle learn procedure (see page

11-349).

17. Check for Temporary DTCs or DTCs with the HDS.

If DTC P0112 is indicated, check for poor

connections or loose terminals at the IAT 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.

Troubleshooting is complete.

18. Update the ECM/PCM if it does not have the latest

software, or substitute a known-good ECM/PCM
(see page 11-6).

19. Check for Temporary DTCs or DTCs with the HDS.

If DTC P0112 is indicated, check for poor

connections or loose terminals at the IAT 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.

If the ECM/PCM was updated, troubleshooting

is complete. If the ECM/PCM was substituted,
replace the original ECM/PCM (see page 11-284).

Wire side of female terminals

Is about 356 °F ( 180 °C) or higher , or 0.08 V or
less indicated?

Is ther e continuity?

Ar e any T empor ar y DT Cs or DT Cs indicated?

05/06/27 17:33:38 61S6M040_110_0109

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