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Honda Ridgeline. Manual - part 82

−

０１

０２

ＳＪＣ８Ａ００Ｋ７７１０００９０１４１ＦＡＡＴ３０

−

DTC P0141:

DTC P0161:

YES

11-92

PGM-FI System

DTC Troubleshooting (cont’d)

SECONDARY HO2S (SENSOR 2) 4P CONNECTOR

Rear Secondary HO2S (Bank 1,

Sensor 2) Heater Circuit Malfunction

Front Secondary HO2S (Bank 2,

Sensor 2) Heater Circuit Malfunction

NOTE:

• Before you troubleshoot, record all freeze data and

any on-board snapshot, and review the general
troubleshooting information (see page 11-3).

• Information marked with an asterisk ( ) applies to the

front bank (Bank 2).

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, the system is OK at this

time. Check for poor connections or loose terminals
at the secondary HO2S (Sensor 2), the A/F sensor
relay (LAF), the under-dash fuse/relay box, and the
PCM.

5. Turn the ignition switch OFF.

6. Check these fuses:

• No. 17 OP1 (40 A) fuse in the under-hood fuse/

relay box

• No. 4 LAF (A/F SENSOR) (15 A) fuse in the under-

dash fuse/relay box

• No. 23 IGP (7.5 A) fuse in the under-dash fuse/

relay box

Repair short in the wire between the A/F

sensors, A/F sensor relay (LAF) and the fuse, then
go to step 23.

Go to step 7.

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 22.

9. Check for continuity between body ground and

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

Go to step 22.

Go to step 10.

Terminal side of male terminals

Is DT C P0141 and/ or P0161 indicated?

Ar e any of the f uses blown?

Is ther e 5.4

6.6

at r oom temper atur e?

Is ther e continuity?

０３

０４

０５

０７

−

YES

11-93

PCM CONNECTOR C (44P)

SO2SHTCB1
(BLK/WHT)

SO2SHTCB2
(GRN/RED)*

SECONDARY HO2S (SENSOR 2) 4P CONNECTOR

SHO2SHTCB1 (BLK/WHT)
SHO2SHTCB2 (GRN/RED)*

JUMPER WIRE

PCM CONNECTOR C (44P)

SO2SHTCB1
(BLK/WHT)

SO2SHTCB2
(GRN/RED)*

10. Jump the SCS line with the HDS.

11. Disconnect PCM connector C (44P).

12. Check for continuity between PCM connector

terminal C5 (C7) and body ground.

Repair short in the wire between the PCM

(C5 (C7) ) and the secondary HO2S (Sensor 2), then
go to step 23.

Go to step 13.

13. Connect secondary HO2S (Sensor 2) 4P connector

terminal No. 3 to body ground with a jumper wire.

14. Check for continuity between PCM connector

terminal C5 (C7) and body ground.

Go to step 15.

Repair open in the wire between the PCM

(C5 (C7) ) and the secondary HO2S (Sensor 2), then
go to step 23.

15. Remove the A/F sensor relay (LAF) (A) from the

under-dash fuse/relay box.

(cont’d)

Terminal side of female terminals

Wire side of female terminals

Terminal side of female terminals

Is ther e continuity?

０６

０８

０９

１０

−

YES

11-94

PGM-FI System

DTC Troubleshooting (cont’d)

SECONDARY HO2S (SENSOR 2) 4P CONNECTOR

IG (WHT/BLK)

JUMPER WIRE

A/F SENSOR RELAY (LAF) 4P CONNECTOR

AFSHTCR

JUMPER
WIRE

A/F SENSOR RELAY (LAF) 4P CONNECTOR

PCM CONNECTOR A (44P)

AFSHTCR (ORN)

16. Connect secondary HO2S (Sensor 2) 4P connector

terminal No. 4 to body ground with a jumper wire.

17. Check for continuity between A/F sensor relay

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

Go to step 18.

Repair open in the wire between the

secondary HO2S (Sensor 2) and the A/F sensor
relay (LAF), then go to step 23.

18. Disconnect PCM connector A (44P).

19. Connect A/F sensor relay (LAF) 4P connector

terminal No. 4 to body ground with a jumper wire.

20. Check for continuity between PCM connector

terminal A21 and body ground.

Go to step 21.

Repair open in the wire between the PCM

(A21) and the A/F sensor relay (LAF), then go to
step 23.

Wire side of female terminals

Terminal side of female terminals

Is ther e continuity?

−

YES

11-95

21. Test the A/F sensor relay (LAF) (see page 22-75).

Go to step 29.

Replace the A/F sensor relay (LAF), then go to

step 23.

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

11-200).

23. Reconnect all connectors.

24. Turn the ignition switch ON (II).

25. Reset the PCM with the HDS.

26. Do the PCM idle learn procedure (see page 11-273).

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

Check for poor connections or loose

terminals at the secondary HO2S (Sensor 2), the
A/F sensor relay (LAF), and the PCM, then go to
step 1.

Go to step 28.

28. Monitor the OBD STATUS for DTC P0141 and/or

P0161 in the DTCs MENU with the HDS.

Troubleshooting is complete. If any other

Temporary DTCs or DTCs were indicated in step 27,
go to the indicated DTC’s troubleshooting.

If the screen indicates FAILED, check for poor

connections or loose terminals at the secondary
HO2S (Sensor 2), the A/F sensor relay (LAF), and
the PCM, then go to step 1. If the screen indicates
NOT COMPLETED, keep idling until a result comes
on.

29. Reconnect all connectors.

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

software (see page 11-7), or substitute a known-
good PCM (see page 11-8).

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

Check for poor connections or loose

terminals at the secondary HO2S (Sensor 2), the
A/F sensor relay (LAF), and the PCM. If the PCM
was updated, substitute a known-good PCM
(see page 11-8), then recheck. If the PCM was
substituted, go to step 1.

Go to step 32.

32. Monitor the OBD STATUS for DTC P0141 and/or

P0161 in the DTCs MENU with the HDS.

If the PCM was updated, troubleshooting is

complete. If the PCM was substituted, replace the
original PCM (see page 11-205). If any other
Temporary DTCs or DTCs were indicated in step 31,
go to the indicated DTC’s troubleshooting.

If the screen indicates FAILED, check for poor

connections or loose terminals at the secondary
HO2S (Sensor 2), the A/F sensor relay (LAF), and
the PCM. If the PCM was updated, substitute a
known-good PCM (see page 11-8), then recheck. If
the PCM was substituted, go to step 1. If the screen
indicates NOT COMPLETED, keep idling until a
result comes on.

Is the A/ F sensor r elay ( LAF ) OK ?

Is DT C P0141 and/ or P0161 indicated?

Does the scr een indicate PASSED?

Is DT C P0141 and/ or P0161 indicated?

Does the scr een indicate PASSED?

Content .. 80 81 82 83 ..