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Honda Ridgeline. Manual - part 79

ＳＪＣ８Ａ００Ｋ７７１０００９０１３４ＦＡＡＴ３０

−

DTC P0134:

DTC P0154:

YES

11-80

PGM-FI System

DTC Troubleshooting (cont’d)

Rear A/F Sensor (Bank 1,

Sensor 1) Heater System Malfunction

Front A/F Sensor (Bank 2,

Sensor 1) Heater System Malfunction

NOTE:

• Before you troubleshoot, record all freeze data and

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

• If DTC P2251, P2237, P2240 , and/or P2254 is stored

at the same time as DTC P0134 and/or P0154 ,
troubleshoot DTC P2251, P2237, P2240 and/or
P2254 first, then recheck for P0134 and/or P0154 .

• 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, and let it idle without load (in Park

or neutral) until the radiator fan comes on.

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 A/F sensor (Sensor 1), the A/F sensor relay
(LAF), the under-dash fuse/relay box, and the
PCM.

5. Turn the ignition switch OFF.

6. Replace the A/F sensor (Sensor 1) (see page

11-199).

7. Turn the ignition switch ON (II).

8. Reset the PCM with the HDS.

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

10. 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.

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

Check for poor connections or loose

terminals at the A/F sensor (Sensor 1), the A/F
sensor relay (LAF), the under-dash fuse/relay box,
and the PCM, then go to step 1.

Go to step 12.

12. Monitor the OBD STATUS for DTC P0134 and/or

P0154 in the DTCs MENU with the HDS.

Troubleshooting is complete. If any other

Temporary DTCs or DTCs were indicated in step 11,
go to the indicated DTC’s troubleshooting.

If the screen indicates FAILED, check for poor

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

Is DT C P0134 and/ or P0154 indicated?

Does the scr een indicate PASSED?

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０１

０２

ＳＪＣ８Ａ００Ｋ７７１０００９０１３５ＦＡＡＴ３０

−

DTC P0135:

DTC P0155:

YES

11-81

A/F SENSOR (SENSOR 1) 8P CONNECTOR

Rear A/F Sensor (Bank 1,

Sensor 1) Heater Circuit Malfunction

Front A/F Sensor (Bank 2,

Sensor 1) 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 A/F sensor (Sensor 1), 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), then replace the
blown fuse(s), and go to step 25.

Go to step 7.

7. Disconnect the A/F sensor (Sensor 1) 8P connector.

8. At the sensor side, measure resistance between A/F

sensor (Sensor 1) 8P connector terminals No. 1 and
No. 2.

Go to step 9.

Go to step 23.

9. At the sensor side, check for continuity between

each terminal at the A/F sensor (Sensor 1) 8P
connector and body ground.

Go to step 23.

Go to step 10.

(cont’d)

Terminal side of male terminals

Is DT C P0135 and/ or P0155 indicated?

Ar e any of the above f uses blown?

Is ther e 2.5

3.2

at r oom temper atur e?

Is ther e continuity?

０３

０４

０５

０６

−

YES

11-82

PGM-FI System

DTC Troubleshooting (cont’d)

A/F SENSOR (SENSOR 1) 8P CONNECTOR

PCM CONNECTOR C (44P)

AFSHTCB1
(BLK/WHT)

AFSHTCB2
(GRN/WHT)*

AFSHTCB1 (BLK/WHT)
AFSHTCB2 (GRN/WHT)*

JUMPER WIRE

A/F SENSOR (SENSOR 1) 8P CONNECTOR

PCM CONNECTOR C (44P)

AFSHTCB1
(BLK/WHT)

AFSHTCB2
(GRN/WHT)*

10. At the sensor side, check for continuity between

A/F sensor (Sensor 1) 8P connector terminals No. 1
and No. 3, No. 1 and No. 4, No. 1 and No. 6, No. 1
and No. 7, and No. 1 and No. 8 individually.

Go to step 23.

Go to step 11.

11. Jump the SCS line with the HDS.

12. Disconnect PCM connector C (44P).

13. Check for continuity between PCM connector

terminal C6 (C8) and body ground.

Repair short in the wire between the PCM

(C6 (C8) ) and the A/F sensor (Sensor 1), then go to
step 24.

Go to step 14.

14. Connect A/F sensor (Sensor 1) 8P connector

terminal No. 2 to body ground with a jumper wire.

15. Check for continuity between PCM connector

terminal C6 (C8) and body ground.

Go to step 16.

Repair open in the wire between the PCM

(C6 (C8) ) and the A/F sensor (Sensor 1), then go to
step 24.

Terminal side of male terminals

Terminal side of female terminals

Wire side of female terminals

Terminal side of female terminals

Is ther e continuity?

０８

０７

０９

−

YES

11-83

IG (WHT/BLK)

JUMPER WIRE

A/F SENSOR (SENSOR 1) 8P CONNECTOR

A/F SENSOR RELAY (LAF) 4P CONNECTOR

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

under-dash fuse/relay box.

17. Connect A/F sensor (Sensor 1) 8P connector

terminal No. 1 to body ground with a jumper wire.

18. Check for continuity between A/F sensor relay

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

Go to step 19.

Repair open in the wire between the A/F

sensor (Sensor 1) and the A/F sensor relay (LAF),
then go to step 24.

19. Disconnect PCM connector A (44P).

(cont’d)

Wire side of female terminals

Terminal side of female terminals

Is ther e continuity?

Content .. 77 78 79 80 ..