Pgm-Fi System: Diagnosis Honda Ridgeline I

DTC P16BB: Alternator B Terminal Circuit Low Voltage

Note. Before you troubleshoot, record all freeze data and any on-board snapshot, and review the general troubleshooting information (see DTC TROUBLESHOOTING INDEX ).

1. Turn the ignition switch ON (II).
2. Clear the DTC with the HDS.
3. Start the engine.
4. Check under these conditions: A/C on Temperature control at maximum cool Blower fan at maximum speed Headlights on high beam
5. Hold the engine speed at 2,000 RPM (in Park or neutral) 1 minute.
6. Check for Temporary DTCs or DTCs with the HDS. Is DTC P16BB indicated? YES - Go to step 7. NO - Intermittent failure, the system is OK at this time. Check for poor connections or loose terminals at the alternator and the under-hood fuse/relay box, and check the battery performance (see «BATTERY»(ref-220005) ).
7. Check for poor connections or loose terminals at the alternator and the under-hood fuse/relay box (+B line). Are the connections and terminals OK? YES - Go to step 8. NO - Repair the connectors or terminals, then go to step 9 .
8. Check for an open in the wire between the alternator and under-hood fuse/relay box at the starter subharness. Is the harness OK? YES - Replace the alternator (see «ALTERNATOR REMOVAL AND INSTALLATION»(ref-219947-S39634466042006021600000) ), then go to step 9. NO - Repair open in the wire between the alternator and the under-hood fuse/relay box, then go to step 9.
9. Turn the ignition switch ON (II).
10. Reset the PCM with the HDS.
11. Do the PCM idle learn procedure (see «PCM IDLE LEARN PROCEDURE»(ref-219960-S21279730262006021600000) ).
12. Start the engine.
13. Check under these conditions: A/C on Temperature control at maximum cool Blower fan at maximum speed Headlights on high beam
14. Hold the engine speed at 2,000 RPM (in Park or neutral) 1 minute.
15. Check for Temporary DTCs or DTCs with the HDS. Is DTC P16BB indicated? YES - Check for poor connections or loose terminals at the alternator and the under-hood fuse/relay box, then go to step 1 . NO - Troubleshooting is complete. If any other Temporary DTCs or DTCs are indicated, go to the indicated DTCs troubleshooting.

DTC P16BC: 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 DTC TROUBLESHOOTING INDEX ).

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1. Check for poor connections at the alternator 4P connector. Are the connections OK? YES - Go to step 2. NO - 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. Is DTC P16BC indicated? YES - Go to step 8. NO - 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. Is there battery voltage? YES - Go to step 12. NO - 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. Is there about 5 V? YES - Replace the alternator (see «ALTERNATOR REMOVAL AND INSTALLATION»(ref-219947-S39634466042006021600000) ), then go to step 18 . NO - Go to step 13.
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. Is there continuity? YES - Go to step 26 . NO - 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 «PCM IDLE LEARN PROCEDURE»(ref-219960-S21279730262006021600000) ).
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. Is DTC P16BC indicated? YES - Check for poor connections or loose terminals at the alternator and the PCM, then go to step 1 . NO - Troubleshooting is complete. If any other Temporary DTCs or DTCs are indicated, go to the indicated DTCs troubleshooting.
26. Reconnect all connectors.
27. Update the PCM if it does not have the latest software (see «PCM UPDATING AND SUBSTITUTION FOR TESTING»(ref-219956-S29187290912006021600000) ), or substitute a known-good PCM (see «SUBSTITUTING THE PCM»(ref-219956-S20631232652006021600000) ).
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. Is DTC P16BC indicated? YES - Check for poor connections or loose terminals at the alternator and the PCM. If the PCM was updated, substitute a known-good PCM (see «SUBSTITUTING THE PCM»(ref-219956-S20631232652006021600000) ), then go to step 28 . If the PCM was substituted, go to step 1 . NO - If the PCM was updated, troubleshooting is complete. If the PCM was substituted, replace the original PCM (see «PCM REPLACEMENT»(ref-299652-S28764766372008092500000) ). If any other Temporary DTCs or DTCs are indicated, go to the indicated DTCs troubleshooting.

DTC P2A00: Rear A/F Sensor (Bank 1, Sensor 1) Circuit Range/Performance Problem; DTC P2A03: Front A/F Sensor (Bank 2, Sensor 1) Circuit Range/Performance Problem

Note. Before you troubleshoot, record all freeze data and any on-board snapshot, and review the general troubleshooting information (see DTC TROUBLESHOOTING INDEX ). 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. 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 (ECT SENSOR 1) above 158°F (70°C) Transmission in D position Vehicle speed at 30 mph (48 km/h) or more, and engine speed at 2,600 RPM or less Drive at an engine speed of 1,600 RPM. Accelerate to full open throttle for 5 seconds, then slow down with the throttle completely closed.
5. Monitor the OBD STATUS for DTC P2A00 and/or P2A03* in the DTCs MENU with the HDS. Does the screen indicate FAILED? YES - Go to step 6. NO - If the screen indicates PASSED, intermittent failure, the system is OK at this time. Check for poor connections or loose terminals at the A/F sensor (Sensor 1) and the PCM. If it is 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 A/F sensor (Sensor 1) (see «A/F SENSOR REPLACEMENT»(ref-299652-S03711830462008092500000) ).
8. Turn the ignition switch ON (II).
9. Reset the PCM with the HDS.
10. Do the PCM idle learn procedure (see «PCM IDLE LEARN PROCEDURE»(ref-219960-S21279730262006021600000) ).
11. Test-drive under these conditions: Engine coolant temperature (ECT SENSOR 1) above 158°F (70°C) Transmission in D position Vehicle speed at 30 mph (48 km/h) or more, and engine speed at 2,600 RPM or less Drive at an engine speed of 1,600 RPM. Accelerate to full open throttle for 5 seconds, then slow down with the throttle completely closed.
12. Check for Temporary DTCs or DTCs with the HDS. Is DTC P2A00 and/or P2A03* indicated? YES - Check for poor connections or loose terminals at the A/F sensor (Sensor 1) and the PCM, then go to step 1 . NO - Go to step 13.
13. Monitor the OBD STATUS for DTC P2A00 and/or P2A03* in the DTCs MENU with the HDS. Does the screen indicate PASSED? YES - Troubleshooting is complete. If any other Temporary DTCs or DTCs were indicated in step 12 , go to the indicated DTCs troubleshooting. NO - If the screen indicates FAILED, check for poor connections or loose terminals at the A/F sensor (Sensor 1) and the 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 .

DLC Circuit Troubleshooting

Note. Make sure the HDS and the DLC cable of the HDS are normal. If the PCM does not communicate with the HDS, do this troubleshooting procedure. Check that MIL circuit is normal, then do this troubleshooting.

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1. Measure voltage between DLC terminal No. 16 and body ground. Is there battery voltage? YES - Go to step 2. NO - Repair open in the wire between DLC terminal No. 16 and the No. 8 FI ECU (PCM) (15 A) fuse in the under-hood fuse/relay box.
2. Measure voltage between DLC terminals No. 4 and No. 16. Is there battery voltage? YES - Go to step 3. NO - Repair open in the wire between DLC terminal No. 4 and body ground (G402).
3. Measure voltage between DLC terminals No. 5 and No. 16. Is there battery voltage? YES - Go to step 4. NO - Repair open in the wire between DLC terminal No. 5 and body ground (G402).
4. Turn the ignition switch ON (II).
5. Measure voltage between DLC terminals No. 5 and No. 7. Is there 8.5 V or more? YES - Go to step 12 . NO - Go to step 6.
6. Turn the ignition switch OFF.
7. Jump the SCS line with the HDS.
8. Disconnect PCM connector A (44P).
9. Check for continuity between DLC terminal No. 7 and body ground. Is there continuity? YES - Repair short to ground in the wire between DLC terminal No. 7 and the PCM (A43). After repairing the wire, check for a DTC with the HDS, and go to the indicated DTC's troubleshooting. NO - Go to step 10.
10. Connect DLC terminal No. 7 to body ground with a jumper wire.
11. Check for continuity between PCM connector terminal A43 and body ground. Is there continuity? YES - Update the PCM if it does not have the latest software (see «PCM UPDATING AND SUBSTITUTION FOR TESTING»(ref-219956-S29187290912006021600000) ), or substitute a known-good PCM (see «SUBSTITUTING THE PCM»(ref-219956-S20631232652006021600000) ). then recheck. If the symptom/indication goes away with a known-good PCM, replace the original PCM (see «PCM REPLACEMENT»(ref-299652-S28764766372008092500000) ). NO - Repair open in the wire between DLC terminal No. 7 and the PCM (A43). After repairing the wire, check for a DTC with the HDS, and go to the indicated DTC's troubleshooting.
12. Turn the ignition switch OFF.
13. Jump the SCS line with the HDS.
14. Disconnect PCM connector A (44P).
15. Turn the ignition switch ON (II).
16. Measure voltage between DLC terminals No. 5 and No. 7. Is there about 0 V? YES - Update the PCM if it does not have the latest software (see «PCM UPDATING AND SUBSTITUTION FOR TESTING»(ref-219956-S29187290912006021600000) ), or substitute a known-good PCM (see «SUBSTITUTING THE PCM»(ref-219956-S20631232652006021600000) ), then recheck. If the symptom/indication goes away with a known-good PCM, replace the original PCM (see «PCM REPLACEMENT»(ref-299652-S28764766372008092500000) ). NO - Repair short to power in the wire between DLC terminal No. 7 and the PCM (A43). After repairing the wire, check for Temporary DTCs or DTCs with the HDS, and go to the indicated DTCs troubleshooting.

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1. Relieve fuel pressure (see «FUEL PRESSURE RELIEVING»(ref-219961-S17067406282006021600000) ).
2. Remove the intake manifold (see «INTAKE MANIFOLD REMOVAL AND INSTALLATION»(ref-219953-S31522250982006021600000) ).
3. Disconnect the connectors from the injectors (A).
4. Disconnect the quick-connect fitting (B).
5. Remove the fuel rail mounting bolts (C) from the fuel rail (D).
6. Remove the injector clip (E) from the fuel rail.
7. Remove the injectors from the rails.
8. Coat the new O-ring (A) with clean engine oil, and insert the injectors (B) into the fuel rail (C).
9. Install the injector clip (D).
10. Coat the new injector O-ring (E) with clean engine oil.
11. Install the injectors in the injector base.
12. Install the fuel rail mounting bolts.
13. Install the connectors on the injectors.
14. Connect the quick-connect fitting (see «FUEL LINE/QUICK-CONNECT FITTING INSTALLATION»(ref-219961-S09689546422006021600000) ).
15. Turn the ignition switch ON (II), but do not operate the starter. After the fuel pump runs for about 2 seconds, the fuel pressure in the fuel line rises. Repeat this two or three times, then check for fuel leakage.
16. Install the intake manifold.