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Acura RSX Honda Integra. Manual - part 112

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DTC P0139:

YES

11-154

PGM-FI System

DTC Troubleshooting (cont’d)

Secondary HO2S (Sensor 2) Slow

Response
(2002-2004 models)

1. Reset the ECM/PCM (see page 11-4).

2. Start the engine. Hold the engine speed at

3,000 rpm without load (in Park or neutral) until the
radiator fan comes on.

3. Check the secondary HO2S (Sensor 2) output

voltage at 3,000 rpm with a scan tool or the HDS.

Replace the secondary HO2S (Sensor 2)

(see page 11-279).

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.

Does the voltage stay within 0.3

0.8 V f or

2 minutes?

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DTC P0139:

YES

11-155

Secondary HO2S (Sensor 2) Slow

Response
(2005-2006 models)

1. Turn the ignition switch ON (II).

2. Clear the DTC with the HDS.

3. 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.

4. Test-drive under these conditions:

• Engine coolant temperature above 158 °F (70 °C)
• A/T in D position (M/T in 4th gear)
• Vehicle speed at 35 mph (56 km/h) or more
• Drive about 20 seconds

5. Monitor the OBD STATUS for DTC P0139 in the

DTCs MENU with the HDS.

Go to step 6.

If the screen indicates PASSED, intermittent

failure, system is OK at this time. If the screen
indicates EXECUTING, keep driving until a result
comes on. If the screen indicates OUT OF
CONDITION, go to step 3 and recheck.

6. Turn the ignition switch OFF.

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

11-279).

8. Turn the ignition switch ON (II).

9. Reset the ECM/PCM with the HDS.

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

11-349).

11. 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.

12. Test-drive under these conditions:

• Engine coolant temperature above 158 °F (70 °C)
• A/T in D position (M/T in 4th gear)
• Vehicle speed at 35 mph (56 km/h) or more
• Drive about 20 seconds

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

If DTC P0139 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 14.

14. Monitor the OBD STATUS for DTC P0139 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 EXECUTING, keep
driving until a result comes on. If the screen
indicates OUT OF CONDITION, go to step 11 and
recheck.

Does the scr een indicate F AILED?

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

Does the scr een indicate PASSED?

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DTC P0141:

YES

11-156

PGM-FI System

DTC Troubleshooting (cont’d)

SECONDARY HO2S (SENSOR 2) 4P CONNECTOR

SHO2SHTC
(BLK/WHT)

IG1 (BLK/ORN)

Secondary HO2S (Sensor 2)

Heater Circuit Malfunction
(2002-2004 models)

1. Reset the ECM/PCM (see page 11-4).

2. Start the engine.

Go to step 3.

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.

3. Turn the ignition switch OFF.

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

connector.

5. 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 6.

Replace the secondary HO2S (Sensor 2)

(see page 11-279).

6. Check for continuity between body ground and

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

Replace the secondary HO2S (Sensor 2)

(see page 11-279).

Go to step 7.

7. Turn the ignition switch ON (II).

8. Measure voltage between secondary HO2S

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

Go to step 9.

Go to step 12.

9. Turn the ignition switch OFF.

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

Wire side of female terminals

Terminal side of male terminals

Is DT C P0141 indicated?

Is ther e 10

Is ther e continuity?

Is ther e batter y voltage?

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YES

11-157

ECM/PCM CONNECTOR E (31P)

SHO2SHTC
(BLK/WHT)

SECONDARY HO2S (SENSOR 2) 4P CONNECTOR

IG1
(BLK/ORN)

ECM/PCM CONNECTORS

A (31P)

E (31P)

SHO2SHTC
(BLK/WHT)

PG1 (BLK)

11. Check for continuity between ECM/PCM connector

terminal E6 and body ground.

Repair short in the wire between the ECM/

PCM (E6) and the secondary HO2S (Sensor 2).

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).

12. Measure voltage between secondary HO2S (Sensor

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

Go to step 13.

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.

13. Turn the ignition switch OFF.

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

connector.

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

16. Turn the ignition switch ON (II).

17. Measure voltage between ECM/PCM connector

terminals A5 and E6.

Repair open in the wire between the ECM/

PCM (E6) and the secondary HO2S (Sensor 2).

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

Terminal side of male terminals

Wire side of female terminals

Is ther e continuity?

Is ther e batter y voltage?

Is ther e 0.1 V or less?

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