Content .. 103 104 105 106 ..

Honda Ridgeline. Manual - part 105

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YES

11-184

PGM-FI System

MIL Circuit Troubleshooting

1. Turn the ignition switch ON (II).

2. Do the gauge self-diagnostic procedure (see page

22-244).

Go to step 3.

Substitute a known-good gauge control

module, and recheck. If the MIL circuit is OK,
replace the original gauge control module.

3. Turn the ignition switch OFF.

4. Turn the ignition switch ON (II), and watch the MIL.

Go to step 17.

Go to step 5.

5. Turn the ignition switch OFF.

6. Turn the ignition switch ON (II), wait 20 seconds,

and watch the MIL.

Go to step 7.

The MIL circuit is OK.

7. Turn the ignition switch OFF.

8. Connect the HDS to the DLC (see page 11-3).

9. Turn the ignition switch ON (II), and read the HDS.

Go to step 10.

Go to ‘‘DLC Circuit Troubleshooting’’

(see page 11-194).

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

Go to the indicated DTC’s troubleshooting.

Go to step 11.

11. Check the MIL in the DATA LIST with the HDS.

Go to step 12.

Substitute a known-good gauge control

module, and recheck. If the MIL circuit is OK,
replace the original gauge control module.

12. Check the SCS in the DATA LIST with the HDS.

Go to step 13.

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), then recheck. If the
symptom/indication goes away with a known-good
PCM, replace the original PCM (see page 11-205).

13. Turn the ignition switch OFF.

14. Jump the SCS line with the HDS.

15. Disconnect PCM connector A (44P), then disconnect

the HDS.

Does the MIL indicator f lash?

Does the MIL stay of f ?

Does the MIL stay on or f lash mor e than 5 times?

Does the HDS communicate with the PCM?

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

Does it indicate ON?

Is a shor t indicated?

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YES

11-185

PCM CONNECTOR A (44P)

SCS (BRN)

16. Check for continuity between PCM connector

terminal A31 and body ground.

Repair short in the wire between the PCM

(A31) and the DLC.

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), then recheck. If the
symptom/indication goes away with a known-good
PCM, replace the original PCM (see page 11-205).

17. Try to start the engine.

Go to step 18.

Go to step 22.

18. Turn the ignition switch OFF.

19. Connect the HDS to the DLC (see page 11-3).

20. Turn the ignition switch ON (II), and read the HDS.

Go to step 21.

Go to ‘‘DLC Circuit Troubleshooting’’

(see page 11-194).

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

Go to the indicated DTC’s troubleshooting.

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), then recheck. If the
symptom/indication goes away with a known-good
PCM, replace the original PCM (see page 11-205).

22. Turn the ignition switch OFF.

23. Inspect the No. 23

B IG MAIN (50 A) fuse in the

under-hood fuse/relay box.

Repair open in the wire between the No. 23

B IG MAIN (50 A) fuse and the ignition switch.

If the wire is OK, go to step 24.

Repair short in the wire between the No. 23

B IG MAIN (50 A) fuse and the under-hood

fuse/relay box. Also replace the No. 23

B IG

MAIN (50 A) fuse.

(cont’d)

Terminal side of female terminals

Is ther e continuity?

Does the engine star t and idle smoothly?

Does the HDS communicate with the PCM?

Is DT C U007 3 and/ or U0155 indicated?

Is the f use OK ?

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11-186

PGM-FI System

MIL Circuit Troubleshooting (cont’d)

PGM-FI MAIN RELAY 1 (FI MAIN)
4P CONNECTOR

24. Inspect the No. 8 FI ECU (PCM) (15 A) fuse in the

under-hood fuse/relay box.

Go to step 31.

Go to step 25.

25. Remove the blown No. 8 FI ECU (PCM) (15 A) fuse

from the under-hood fuse/relay box.

26. Remove PGM-FI main relay 1 (FI MAIN) (A) from

the driver’s under-dash fuse/relay box.

27. Check for continuity between body ground and

PGM-FI main relay 1 (FI MAIN) 4P connector
terminals No. 1 and No. 3 individually.

Repair short in the wire between the No. 8 FI

ECU (PCM) (15 A) fuse and PGM-FI main relay 1
(FI MAIN). Also replace the No. 8 FI ECU (PCM)
(15 A) fuse.

Go to step 28.

Terminal side of female terminals

Is the f use OK ?

Is ther e continuity?

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YES

11-187

PGM-FI MAIN RELAY 1 (FI MAIN)
4P CONNECTOR

IGP

PGM-FI MAIN RELAY 1 (FI MAIN)
4P CONNECTOR

IGP

28. Disconnect each of the components or connectors

below, one at a time, and check for continuity
between PGM-FI main relay 1 (FI MAIN) 4P
connector terminal No. 2 and body ground.

• PGM-FI main relay 2 (FUEL PUMP)
• PCM connector B (44P)
• Each injector 2P connector
• Camshaft position (CMP) sensor 3P connector
• Crankshaft position (CKP) sensor A/B 6P

connector

• Electronic throttle control system (ETCS) control

relay

Replace the component that made the short

to body ground go away when disconnected. If the
item is the PCM, 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), then recheck. If
the symptom/indication goes away with a known-
good PCM, replace the original PCM (see page
11-205). Also replace the No. 8 FI ECU (PCM) (15 A)
fuse.

Go to step 29.

29. Disconnect the all connectors from these

components:

• PGM-FI main relay 2 (FUEL PUMP)
• PCM connector B (44P)
• Injectors
• Camshaft position (CMP) sensor
• Crankshaft position (CKP) sensor A/B
• Electronic throttle control system (ETCS) control

relay

30. Check for continuity between PGM-FI main relay 1

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

Repair short in the wire between PGM-FI

main relay 1 (FI MAIN) and each item. Also replace
the No. 8 FI ECU (PCM) (15 A) fuse.

Replace PGM-FI main relay 1 (FI MAIN). Also

replace the No. 8 FI ECU (PCM) (15 A) fuse.

31. Inspect the No. 19 IG FUEL PUMP (15 A) fuse in the

under-dash fuse/relay box.

Go to step 44.

Go to step 32.

32. Remove the blown No. 19 IG FUEL PUMP (15 A)

fuse in the under-dash fuse/relay box.

33. Jump the SCS line with the HDS.

34. Disconnect PCM connector B (44P).

(cont’d)

Terminal side of female terminals

Does continuity go away when one of the above
components is disconnected?

Is ther e continuity?

Is the f use OK ?

Content .. 103 104 105 106 ..