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Pgm-Fi System: Diagnosis Honda Pilot I

Testing & Diagnostics 15 illustrations ~1076 words

DTC Troubleshooting

DTCDescription
DTC P0107MAP Sensor Circuit Low Voltage
DTC P0108MAP Sensor Circuit High Voltage
DTC P0112IAT Sensor Circuit Low Voltage
DTC P0113IAT Sensor Circuit High Voltage
DTC P0116ECT Sensor Range/Performance Problem
DTC P0117ECT Sensor Circuit Low Voltage
DTC P0118ECT Sensor Circuit High Voltage
DTC P0122TP Sensor Circuit Low Voltage
DTC P0123TP Sensor Circuit High Voltage
DTC P0128Cooling System Malfunction
DTC P0131Primary HO2S (Sensor 1) Circuit Low Voltage
DTC P0132Primary HO2S (Sensor 1) Circuit High Voltage
DTC P0133Primary HO2S (Sensor 1) Slow Response
DTC P0135Primary HO2S (Sensor 1) Heater Circuit Malfunction
DTC P0137Secondary HO2S (Sensor 2) Circuit LOW Voltage
DTC P0138Secondary HO2S (Sensor 2) Circuit High Voltage
DTC P0139Secondary HO2S (Sensor 2) Slow Response
DTC P0141Secondary HO2S (Sensor 2) Heater Circuit Malfunction
DTC P0171Fuel System Tool Lean
DTC P0172DTC P0172: Fuel System Too Rich
DTC P0300(1)
DTC P0301No. 1 Cylinder Misfire Detected
DTC P0302No. 2 Cylinder Misfire Detected
DTC P0303No. 3 Cylinder Misfire Detected
DTC P0304No. 4 Cylinder Misfire Detected
DTC P0305No. 5 Cylinder Misfire Detected
DTC P0306No. 6 Cylinder Misfire Detected
DTC P0325Knock Sensor Circuit Malfunction
DTC P0335CKP Sensor No Signal
DTC P0336CKP Sensor Intermittent Interruption
DTC P0340CMP Sensor A No Signal
DTC P0341CMP Sensor A Intermittent Interruption
DTC P0365CMP Sensor B No Signal
DTC P0366CMP Sensor B Intermittent Interruption
DTC P0607PCM Backup Circuit Malfunction
DTC P1106BARO Sensor Range/Performance Problem
DTC P1107BARO Sensor Circuit Low Voltage
DTC P1108BARO Sensor Circuit High Voltage
DTC P1121TP Sensor Signal Lower Than Expected
DTC P1122TP Sensor Signal Higher Than Expected.
DTC P1128MAP Sensor Signal Lower Than Expected
DTC P1129MAP Sensor Signal Higher Than Expected
DTC P1297ELD Circuit Low Voltage
DTC P1298ELD Circuit High Voltage
DTC P1607PCM Internal Circuit Malfunction
(1) Random Misfire Detected and any combination of the following; DTC P0301: No. 1 Cylinder Misfire Detected, DTC P0302: No. 2 Cylinder Misfire Detected, DTC P0303: No. 3 Cylinder Misfire Detected, DTC P0304: No. 4 Cylinder Misfire Detected, DTC P0305: No. 5 Cylinder Misfire Detected, DTC P0306:No. 6 Cylinder Misfire Detected.
(1)Random Misfire Detected and any combination of the following; DTC P0301: No. 1 Cylinder Misfire Detected, DTC P0302: No. 2 Cylinder Misfire Detected, DTC P0303: No. 3 Cylinder Misfire Detected, DTC P0304: No. 4 Cylinder Misfire Detected, DTC P0305: No. 5 Cylinder Misfire Detected, DTC P0306:No. 6 Cylinder Misfire Detected.

DTC TROUBLESHOOTING INDEX

Scheme 65

Scheme 65: DTC P0107: MAP Sensor Circuit Low Voltage
Scheme 65: DTC P0107: MAP Sensor Circuit Low Voltage

Scheme 66

Scheme 66
Scheme 66

Scheme 67

Scheme 67
Scheme 67
  1. Turn the ignition switch ON (II).
  2. Check the MAP with the scan tool or the HDS. Is about 101 kPa (760 mmHg, 30 in.Hg) or 2.9 V indicated? YES -Intermittent failure, system is OK at this time. Check for poor connections or loose terminals at the MAP sensor and at the PCM. NO -Go to step 3.
  3. Turn the ignition switch OFF.
  4. Disconnect the MAP sensor 3P connector.
  5. Turn the ignition switch ON (II).
  6. Measure voltage between MAP sensor 3P connector terminals No. 1 and No. 3. Is there about 5 V? YES -Go to step 8 . NO -Go to step 7.
  7. Measure voltage between PCM connector terminals C19 and C7. Is there about 5 V? YES -Repair open in the wire between the PCM (C19) and the MAP sensor. NO -Substitute a known-good PCM and recheck (see «HOW TO SUBSTITUTE THE PCM FOR TESTING»(ref-173995-S22023424662005041500000) ). If normal MAP is indicated, replace the original PCM.
  8. Check the MAP with the scan tool or the HDS. Is about 2 kPa (15 mmHg, 0.6 in.Hg) or less, or 0 V indicated? YES -Go to step 9. NO -Replace the MAP sensor.
  9. Turn the ignition switch OFF.
  10. Disconnect PCM connector C (31P).
  11. Check for continuity between MAP sensor 3P connector terminal No. 2 and body ground. Is there continuity? YES -Repair short in the wire between the PCM (C17) and the MAP sensor. NO -Substitute a known-good PCM and recheck (see «HOW TO SUBSTITUTE THE PCM FOR TESTING»(ref-173995-S22023424662005041500000) ). If normal MAP is indicated, replace the original PCM.

Scheme 68

Scheme 68: DTC P0108: MAP Sensor Circuit High Voltage
Scheme 68: DTC P0108: MAP Sensor Circuit High Voltage

Scheme 69

Scheme 69
Scheme 69

Scheme 70

Scheme 70
Scheme 70
  1. Start the engine. Hold the engine at 3,000 rpm with no load (in Park or neutral) until the radiator fan comes on, then let it idle.
  2. Check the MAP with the scan tool or the HDS. Is about 101 kPa (760 mmHg, 30 in.Hg) or higher, or about 2.9 V or higher indicated? YES -Go to step 3. NO -Intermittent failure, system is OK at this time. Check for poor connections or loose terminals at the MAP sensor and at the PCM.
  3. Turn the ignition switch OFF.
  4. Disconnect the MAP sensor 3P connector.
  5. Connect MAP sensor 3P connector terminals No. 2 and No. 3 with a jumper wire.
  6. Turn the ignition switch ON (II).
  7. Check the MAP with the scan tool or the HDS. Is about 101 kPa (760 mmHg, 30 in.Hg) or higher or 2.9 V or higher indicated? YES -Go to step 8. NO -Replace the MAP sensor.
  8. Remove the jumper wire.
  9. Measure voltage between MAP sensor 3P connector terminals No. 1 and No. 3. Is there about 5 V? YES -Go to step 10. NO -Repair open in the wire between the PCM (C7) and the MAP sensor.
  10. Turn the ignition switch OFF.
  11. Connect PCM connector terminals C7 and C17 with a jumper wire.
  12. Turn the ignition switch ON (II).
  13. Check the MAP with the scan tool or the HDS. Is about 101 kPa (760 mmHg, 30 in.Hg) or higher, or about 2.9 V or higher indicated? YES -Substitute a known-good PCM and recheck (see «HOW TO SUBSTITUTE THE PCM FOR TESTING»(ref-173995-S22023424662005041500000) ). If normal voltage is indicated, replace the original PCM. NO -Repair open in the wire between the PCM (C17) and the MAP sensor.

DLC Circuit Troubleshooting

If the PCM does not communicate with the scan tool, HDS or I/M test equipment, do this troubleshooting procedure.

Scheme 71

Scheme 71: DLC Circuit Troubleshooting
Scheme 71: DLC Circuit Troubleshooting

Scheme 72

Scheme 72
Scheme 72

Scheme 73

Scheme 73
Scheme 73

Scheme 74

Scheme 74
Scheme 74

Scheme 75

Scheme 75
Scheme 75

Scheme 76

Scheme 76
Scheme 76

Scheme 77

Scheme 77
Scheme 77
  1. Turn the ignition switch ON (II).
  2. Measure voltage between data link connector (DLC) terminal No. 16 and body ground. Is there battery voltage? YES -Go to step 3. NO -Repair open in the wire between DLC terminal No. 16 and the ACGS (15A) fuse in the under-hood fuse/relay box.
  3. Measure voltage between DLC terminals No. 4 and No. 16. Is there battery voltage? YES -Go to step 4. NO -Repair open in the wire between DLC terminal No. 4 and body ground.
  4. Measure voltage between DLC terminals No. 5 and No. 16. Is there battery voltage? YES -Go to step 5. NO -Repair open in the wire between DLC terminal No. 5 and body ground.
  5. Measure voltage between DLC terminals No. 5 and No. 7. Is there 8.5 V or more? YES -Go to step 10 . NO -Go to step 6.
  6. Turn the ignition switch OFF.
  7. Disconnect the PCM connector A (32P).
  8. 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 (A21). NO -Go to step 9.
  9. Check for continuity between DLC terminal No. 7 and PCM terminal A21. Is there continuity? YES -Substitute a known-good PCM and recheck (see «HOW TO SUBSTITUTE THE PCM FOR TESTING»(ref-173995-S22023424662005041500000) ). If the symptom/indication goes away, replace the original PCM. NO -Repair open in the wire between DLC terminal No. 7 and the PCM (A21).
  10. Turn the ignition switch OFF.
  11. Disconnect the PCM connector A (32P).
  12. Turn the ignition switch ON (II).
  13. Measure voltage between DLC terminals No. 5 and No. 7. Is there 0V? YES -Substitute a known-good PCM and recheck (see «HOW TO SUBSTITUTE THE PCM FOR TESTING»(ref-173995-S22023424662005041500000) ). If the symptom/indication goes away, replace the original PCM. NO -Repair short to power in the wire between DLC terminal No. 7 and PCM (A21).

Scheme 78

Scheme 78: Injector Replacement
Scheme 78: Injector Replacement

Scheme 79

Scheme 79
Scheme 79
  1. Relieve fuel pressure (see «FUEL PRESSURE RELIEVING»(ref-174005-S05905615012005042700000) ).
  2. Remove the intake manifold (see «INTAKE MANIFOLD REMOVAL & INSTALLATION»(ref-173990-S36628467322005041500000) ).
  3. Disconnect the connectors from the injectors (A).
  4. Remove the fuel rail mounting bolts (B) from the fuel rail (C).
  5. Remove the fuel rails.
  6. Remove the injectors from the fuel rails.
  7. Slide new cushion rings (A) onto the injectors (B).
  8. Coat the new O-rings (C) with clean engine oil, and put them on the injectors.
  9. Insert the injectors into the fuel rail (D).
  10. Coat new seal rings (E) with clean engine oil, and press them into the intake manifold.
  11. Install the fuel rail in the intake manifold.
  12. Install the fuel rail mounting bolts.
  13. Install the connectors on the injectors.
  14. Install the intake manifold and the intake manifold cover.
  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 2 or 3 times, then check for fuel leakage.

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