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Acura RSX Honda Integra. Manual - part 113

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DTC P0141:

YES

11-158

PGM-FI System

DTC Troubleshooting (cont’d)

SECONDARY HO2S (SENSOR 2) 4P CONNECTOR

Secondary HO2S (Sensor 2)

Heater Circuit Malfunction
(2005-2006 models)

1. Turn the ignition switch 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, system is OK at this time.

Check for poor connections or loose terminals at
the secondary HO2S (Sensor 2) and the
ECM/PCM.

5. Check the No. 4 ACG (10 A) fuse in the under-dash

fuse/relay box.

Go to step 6.

Repair short in the wire between the

secondary HO2S (Sensor 2) and the No. 4 ACG
(10 A) fuse, then go to step 24.

6. Turn the ignition switch OFF.

7. Disconnect the secondary HO2S (Sensor 2) 4P

connector.

8. At the secondary HO2S (Sensor 2) side, measure

resistance between secondary HO2S (Sensor 2) 4P
connector terminals No. 3 and No. 4.

Go to step 9.

Go to step 23.

9. At the secondary HO2S (Sensor 2) side, check for

continuity between body ground and secondary
HO2S (Sensor 2) 4P connector terminals No. 3 and
No. 4 individually.

Go to step 23.

Go to step 10.

Wire side of female terminals

Is DT C P0141 indicated?

Is the f use OK ?

Is ther e 5.0

6.4

at r oom temper atur e?

Is ther e continuity?

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YES

11-159

SECONDARY HO2S (SENSOR 2) 4P CONNECTOR

SHO2S
HTC
(BLK/WHT)

IG1
(BLK/ORN)

ECM/PCM CONNECTOR E (31P)

SHO2SHTC
(BLK/WHT)

SECONDARY HO2S (SENSOR 2) 4P CONNECTOR

IG1
(BLK/ORN)

10. Turn the ignition switch ON (II).

11. On the harness side, measure voltage between

secondary HO2S (Sensor 2) 4P connector terminals
No. 3 and No. 4.

Go to step 12.

Go to step 16.

12. Turn the ignition switch OFF.

13. Jump the SCS line with the HDS.

14. Disconnect ECM/PCM connector E (31P).

15. Check for continuity between ECM/PCM connector

terminal E21 and body ground.

Repair short in the wire between the ECM/

PCM (E21) and the secondary HO2S (Sensor 2),
then go to step 24.

Go to step 30.

16. Measure voltage between secondary HO2S

(Sensor 2) 4P connector terminal No. 4 and body
ground.

Go to step 17.

Check the No. 4 ACG (10 A) fuse in the under-

dash fuse/relay box. If the fuse is OK, repair open in
the wire between the secondary HO2S (Sensor 2)
and the No. 4 ACG (10 A) fuse, then go to step 24.

(cont’d)

Terminal side of male terminals

Wire side of female terminals

Terminal side of male terminals

Is ther e batter y voltage?

Is ther e continuity?

Is ther e batter y voltage?

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YES

11-160

PGM-FI System

DTC Troubleshooting (cont’d)

PG1 (BLK)

SHO2SHTC
(BLK/WHT)

E (31P)

A (31P)

ECM/PCM CONNECTORS

17. Turn the ignition switch OFF.

18. Jump the SCS line with the HDS.

19. Reconnect the secondary HO2S (Sensor 2) 4P

connector.

20. Disconnect ECM/PCM connector E (31P).

21. Turn the ignition switch ON (II).

22. Measure voltage between ECM/PCM connector

terminals A5 and E21.

Repair open in the wire between the ECM/

PCM (E21) and the secondary HO2S (Sensor 2),
then go to step 24.

Go to step 30.

23. Replace the secondary HO2S (Sensor 2) (see page

11-279).

24. Reconnect all connectors.

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 P0141 is indicated, check for poor

connections or loose terminals at the secondary
HO2S (Sensor 2) 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 29.

29. Monitor the OBD STATUS for DTC P0141 in the

DTCs MENU with the HDS.

Troubleshooting is complete.

If the screen indicates FAILED, check for poor

connections or loose terminals at the secondary
HO2S (Sensor 2) and the ECM/PCM, then go to
step 1. If the screen indicates NOT COMPLETED, go
to step 27 and recheck.

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

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

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

If DTC P0141 is indicated, check for poor

connections or loose terminals at the secondary
HO2S (Sensor 2) 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 0.1 V or less?

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

Does the scr een indicate PASSED?

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

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DTC P0171:

DTC P0172:

Special Tools Required

YES

11-161

Fuel System Too Lean

(2002-2004 models)

Fuel System Too Rich

(2002-2004 models)

Vacuum pump/gauge, 0

30 in.Hg, Snap-on YA4000A

or equivalent, commercially available

NOTE: If some of the DTCs listed below are stored at
the same time as DTC P0171 and/or P0172,
troubleshoot those DTCs first, then recheck for P0171
and/or P0172.

P0107, P0108, P1128, P1129: Manifold absolute
pressure (MAP) sensor
P1166, P1167 , P0135 : A/F sensor (Sensor 1) heater
P0137, P0138: Secondary HO2S (Sensor 2)
P0141: Secondary HO2S (Sensor 2) heater
P0340, P0344: CMP sensor A
P1259, P2646 , P2647 : VTEC system

1: 2002 model
2: 2004 model

1. Check the fuel pressure (see page 11-363).

Go to step 2.

Check these items:

• If the pressure is too high, replace the fuel

pressure regulator (see page 11-373).

• If the pressure is too low, check the fuel pump,

the fuel feed pipe, and the fuel filter, and replace
the fuel pressure regulator (see page 11-373).

2. Turn the ignition switch OFF.

3. With the vacuum pump/gauge, 0

30 in.Hg,, apply

vacuum to the evaporative emission (EVAP)
canister purge valve (A) from the intake manifold
side.

Check the valve clearances and adjust if

necessary. If the valve clearances are OK, replace
the injectors (see page 11-277).

Replace the EVAP canister purge valve

(see page 11-412).

Is the f uel pr essur e OK ?

Does it hold vacuum?

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