Content .. 93 94 95 96 ..

Honda Ridgeline. Manual - part 95

０１

０２

ＳＪＣ８Ａ００Ｋ７７１０００９１６ＢＣＦＡＡＴ００

−

DTC P16BC:

YES

11-144

PGM-FI System

DTC Troubleshooting (cont’d)

ALTERNATOR 4P CONNECTOR

IG1
(BLK/YEL)

ALTERNATOR 4P CONNECTOR

ALTF
(WHT/RED)

Alternator FR Terminal Circuit/

IGP Circuit Low Voltage

NOTE: Before you troubleshoot, record all freeze data
and any on-board snapshot, and review the general
troubleshooting information (see page 11-3).

1. Check for poor connections at the alternator 4P

connector.

Go to step 2.

Repair the connections, then go to step 18.

2. Turn the ignition switch ON (II).

3. Clear the DTC with the HDS.

4. Start the engine.

5. Check under these conditions:

• A/C on
• Temperature control at maximum cool
• Blower fan at maximum speed
• Headlights on high beam

6. Hold the engine speed at 2,000 rpm (in Park or

neutral) 1 minute.

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

Go to step 8.

Intermittent failure, the system is OK at this

time. Check for poor connections or loose terminals
at the alternator.

8. Turn the ignition switch OFF.

9. Disconnect the alternator 4P connector.

10. Turn the ignition switch ON (II).

11. Measure voltage between alternator 4P connector

terminal No. 1 and body ground.

Go to step 12.

Repair open in the wire between the

alternator (IG1 line) and the No. 18 IG ACG (15 A)
fuse in under-dash fuse/relay box, then go to step
18.

12. Measure voltage between alternator 4P connector

terminal No. 4 and body ground.

Replace the alternator (see page 4-34), then

go to step 18.

Go to step 13.

Wire side of female terminals

Ar e the connections OK ?

Is DT C P16BC indicated?

Is ther e batter y voltage?

Is ther e about 5 V ?

０３

０４

−

YES

11-145

ALTERNATOR 4P CONNECTOR

ALTF
(WHT/RED)

JUMPER WIRE

PCM CONNECTOR C (44P)

ALTF
(WHT/RED)

13. Turn the ignition switch OFF.

14. Jump the SCS line with the HDS.

15. Disconnect PCM connector C (44P).

16. Connect alternator 4P connector terminal No. 4 to

body ground with a jumper wire.

17. Check for continuity between PCM connector

terminal C41 and body ground.

Go to step 26.

Repair open in the wire between the PCM

(C41) and the alternator, then go to step 18.

18. Reconnect all connectors.

19. Turn the ignition switch ON (II).

20. Reset the PCM with the HDS.

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

22. Start the engine.

23. Check under these conditions:

• A/C on
• Temperature control at maximum cool
• Blower fan at maximum speed
• Headlights on high beam

24. Hold the engine speed at 2,000 rpm (in Park or

neutral) 1 minute.

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

Check for poor connections or loose

terminals at the alternator and the PCM, then go to
step 1.

Troubleshooting is complete. If any other

Temporary DTCs or DTCs are indicated, go to the
indicated DTC’s troubleshooting.

(cont’d)

Wire side of female terminals

Terminal side of female terminals

Is ther e continuity?

Is DT C P16BC indicated?

−

YES

11-146

PGM-FI System

DTC Troubleshooting (cont’d)

26. Reconnect all connectors.

27. 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).

28. Start the engine.

29. Check under these conditions:

• A/C on
• Temperature control at maximum cool
• Blower fan at maximum speed
• Headlights on high beam

30. Hold the engine speed at 2,000 rpm (in Park or

neutral) 1 minute.

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

Check for poor connections or loose

terminals at the alternator and the PCM. If the PCM
was updated, substitute a known-good PCM
(see page 11-8), then go to step 28. If the PCM was
substituted, go to step 1.

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 are indicated, go to the
indicated DTC’s troubleshooting.

Is DT C P16BC indicated?

ＳＪＣ８Ａ００Ｋ７７１０００９２１８３ＦＡＡＴ００

−

DTC P2183:

YES

11-147

ECT Sensor 2 Circuit Range/

Performance Problem

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 P0111 is stored at the same time as DTC P2183,

troubleshoot DTC P0111 first, then recheck for DTC
P2183.

1. Check for poor connections or loose terminals at

ECT sensor 1 and ECT sensor 2.

Go to step 2.

Repair the connectors or terminals, then go to

step 27.

2. Turn the ignition switch ON (II).

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

Go to step 15.

Go to step 4.

4. Start the engine, and let it idle 10 minutes.

5. Check ECT SENSOR 2 in the DATA LIST with the

HDS.

Replace ECT sensor 2 (see page 11-201), then

go to step 27.

Go to step 6.

6. Turn the ignition switch OFF.

7. Drain the coolant (see page 10-6).

8. Remove ECT sensor 2 (see page 11-201).

9. Allow ECT sensor 2 to cool to ambient temperature.

10. Note the ambient temperature.

11. Connect ECT sensor 2 to its 2P connector, but do

not install it on the engine.

12. Turn the ignition switch ON (II).

13. Note the value of ECT SENSOR 2 quickly in the

DATA LIST with the HDS.

14. Compare the value of ECT SENSOR 2 and the

ambient temperature.

Replace ECT sensor 2 (see page 11-201), then

go to step 27.

Intermittent failure, the system is OK at this

time. Check for poor connections or loose terminals
at ECT sensor 1, ECT sensor 2, and the PCM.

15. Start the engine, and let it idle 10 minutes.

16. Check ECT SENSOR 1 in the DATA LIST with the

HDS.

Replace ECT sensor 1 (see page 11-201), then

go to step 27.

Go to step 17.

17. Let the engine idle 10 minutes.

18. Check ECT SENSOR 2 in the DATA LIST with the

HDS.

Replace ECT sensor 2 (see page 11-201), then

go to step 27.

Go to step 19.

(cont’d)

Ar e the connections and ter minals OK ?

Ar e DT C P1116 and P2183 indicated at the same
time?

Is about 131 °F ( 55 °C) or less, or 1.50 V or mor e
indicated?

Does ECT SENSOR 2 dif f er 5.4 °F ( 3 °C) or
mor e?

Is about 118 °F ( 48 °C) or less, or 1.7 5 V or mor e
indicated?

Is about 131 °F ( 55 °C) or less, or 1.50 V or mor e
indicated?

Content .. 93 94 95 96 ..