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Acura RSX Honda Integra. Manual - part 105

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YES

11-126

PGM-FI System

DTC Troubleshooting (cont’d)

ECM/PCM CONNECTOR A (31P)

SG2
(GRN/YEL)

VCC2
(YEL/BLU)

15. Measure voltage between ECM/PCM connector

terminals A20 and A23.

Repair open in the wire between the ECM/

PCM (A20) and the TP sensor, then go to step 18.

Go to step 22.

16. Replace the throttle body, K20Z1 engine (see page

11-410), K20A3 engine (see page 11-411).

17. Reconnect all connectors.

18. Turn the ignition switch ON (II).

19. Reset the ECM/PCM with the HDS.

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

11-349).

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

If DTC P0122 is indicated, check for poor

connections or loose terminals at the TP 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.

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

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

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

If DTC P0122 is indicated, check for poor

connections or loose terminals at the TP 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 ther e about 5 V ?

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

05/06/27 17:34:18 61S6M040_110_0126

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DTC P0123:

YES

11-127

TP SENSOR 3P CONNECTOR

VCC2
(YEL/BLU)

SG2
(GRN/YEL)

SG2
(GRN/YEL)*

VCC2
(YEL/BLU)*

ECM/PCM CONNECTOR A (31P)

VCC2
(YEL/BLU)

SG2
(GRN/YEL)

TP Sensor Circuit High Voltage

(2002-2004 models)

NOTE: Information marked with an asterisk ( ) applies
to K20A2 engine.

1. Turn the ignition switch ON (II).

2. Check the throttle position with a scan tool or the

HDS.

Intermittent failure, system is OK at this time.

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

Go to step 3.

3. Turn the ignition switch OFF.

4. Disconnect the TP sensor 3P connector.

5. Turn the ignition switch ON (II).

6. At the wire harness side, measure voltage between

TP sensor 3P connector terminals No. 1 and No. 3.

Replace the throttle body, K20A2 engine

(see page 11-410), K20A3 engine (see page 11-411).

Go to step 7.

7. Measure voltage between ECM/PCM connector

terminals A10 and A20.

Repair open in the wire between the ECM/

PCM (A10) and the TP 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).

Wire side of female terminals

Is ther e about 10 % or 0.5 V when the thr ottle is
f ully closed and about 90 % or 4.5 V when the
thr ottle is f ully opened?

Is ther e about 5 V ?

05/06/27 17:34:18 61S6M040_110_0127

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DTC P0123:

YES

11-128

PGM-FI System

DTC Troubleshooting (cont’d)

TP SENSOR 3P CONNECTOR

VCC2
(YEL/BLU)
SG2
(GRN/YEL)*

SG2
(GRN/YEL)
VCC2
(YEL/BLU)*

ECM/PCM CONNECTOR A (31P)

SG2
(GRN/YEL)

VCC2
(YEL/BLU)

TP Sensor Circuit High Voltage

(2005-2006 models)

NOTE: Information marked with an asterisk ( ) applies
to K20Z1 engine.

1. Turn the ignition switch ON (II).

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

HDS.

Intermittent failure, system is OK at this time.

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

Go to step 3.

3. Turn the ignition switch OFF.

4. Disconnect the TP sensor 3P connector.

5. Turn the ignition switch ON (II).

6. At the wire harness side, measure voltage between

TP sensor 3P connector terminals No. 1 and No. 3.

Go to step 8.

Go to step 7.

7. Measure voltage between ECM/PCM connector

terminals A20 and A23.

Repair open in the wire between the ECM/

PCM (A23) and the TP sensor, then go to step 10.

Go to step 14.

8. Turn the ignition switch OFF.

9. Replace the throttle body, K20Z1 engine (see page

11-410), K20A3 engine (see page 11-411).

10. Reconnect all connectors.

11. Turn the ignition switch ON (II).

12. Reset the ECM/PCM with the HDS.

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

11-349).

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

If DTC P0123 is indicated, check for poor

connections or loose terminals at the TP 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.

Wire side of female terminals

Is ther e about 0.5 V when the thr ottle is f ully
closed and about 4.5 V when the thr ottle is f ully
opened?

Is ther e about 5 V ?

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

05/06/27 17:34:19 61S6M040_110_0128

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YES

11-129

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

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

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

If DTC P0123 is indicated, check for poor

connections or loose terminals at the TP 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).

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

05/06/27 17:34:19 61S6M040_110_0129

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