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Pgm-Fi System: Diagnosis Honda Accord VI

Testing & Diagnostics 15 illustrations ~1282 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 P0128/P1486Cooling 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 - Except F23A4 SULEV Engine
DTC P0137Secondary HO2S (Sensor 2) Circuit Low Voltage - F23A4 SULEV engine
DTC P0138Secondary HO2S (Sensor 2) Circuit High Voltage - Except F23A4 SULEV engine
DTC P0138Secondary HO2S (Sensor 2) Circuit High Voltage - F23A4 SULEV Engine
DTC P0139Secondary HO2S (Sensor 2) Slow Response - Except F23A4 SULEV Engine
DTC P0139Secondary HO2S (Sensor 2) Slow Response - F23A4 SULEV engine
DTC P0141Secondary HO2S (Sensor 2) Heater Circuit Malfunction
DTC P0171Fuel System Too Lean
DTC P0172Fuel System Too Rich
DTC P0301No. 1 Cylinder Misfire
DTC P0302No. 2 Cylinder Misfire
DTC P0303No. 3 Cylinder Misfire
DTC P0304No. 4 Cylinder Misfire
DTC P0325KS Circuit Malfunction
DTC P0335CKP Sensor No signal
DTC P0336CKP Sensor Intermittent Interruption
DTC P0361TDC 1 Sensor Intermittent Interruption
DTC P0362TDC 1 Sensor No Signal
DTC P0500VSS Circuit Malfunction
DTC P0560ECM/PCM Back up Circuit Low Voltage
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 P1149A/F Sensor (Sensor 1) Range/Performance Problem
DTC P1162A/F Sensor (Sensor 1) Circuit Malfunction
DTC P1163A/F Sensor (Sensor 1) Slow Response
DTC P1164A/F Sensor (Sensor 1) Range/Performance Problem
DTC P1165A/F Sensor (Sensor 1) Range/Performance Problem
DTC P1166A/F Sensor (Sensor 1) Heater Circuit Malfunction
DTC P1167A/F Sensor (Sensor 1) Heater System Malfunction
DTC P1297ELD Circuit Low Voltage
DTC P1298ELD Circuit High Voltage
DTC P1359CKP/TDC Sensor Circuit Malfunction
DTC P1381CYP Sensor Intermittent Interruption
DTC P1382CYP Sensor No Signal
DTC P1607ECM/PCM Internal Circuit Malfunction

DTC Troubleshooting Index

Scheme 86

Scheme 86: DTC P0107: MAP Sensor Circuit Low Voltage
Scheme 86: DTC P0107: MAP Sensor Circuit Low Voltage

Scheme 87

Scheme 87
Scheme 87

Scheme 88

Scheme 88
Scheme 88
  1. Turn the ignition switch ON (II).
  2. Check the MAP with the scan tool. Is approx. 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 wires at the MAP sensor and the ECM/PCM. NO - Go to step 3.
  3. Turn the ignition switch OFF.
  4. Disconnect the MAP sensor connector.
  5. Turn the ignition switch ON (II).
  6. Measure voltage between MAP sensor connector terminals No. 1 and No. 2. Is there approx. 5 V? YES - Go to step 8 . NO - Go to step 7.
  7. Measure voltage between ECM/PCM connector terminals C19 and C7. Is there approx. 5 V? YES - Repair open in the wire between the ECM/PCM (C19) and the MAP sensor. NO - Substitute a known-good ECM/PCM and recheck (see «HOW TO REMOVE THE ECM/PCM FOR TESTING»(ref-177983-S16233168012005060900000) ). If normal MAP readings are indicated, replace the original ECM/PCM.
  8. Check the MAP with the scan tool. Is approx. 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 ECM/PCM connector C (31P).
  11. Check for continuity between MAP sensor connector terminal No. 3 and body ground. Is there continuity? YES - Repair short in the wire between the ECM/PCM (C17) and the MAP sensor. NO - Substitute a known-good ECM/PCM and recheck (see «HOW TO SUBSTITUTE THE ECM/PCM FOR TESTING PURPOSES»(ref-177983-S06033682252005060900000) ). If normal MAP readings are indicated, replace the original ECM/PCM.

Scheme 89

Scheme 89: DTC P0108: MAP Sensor Circuit High Voltage
Scheme 89: DTC P0108: MAP Sensor Circuit High Voltage

Scheme 90

Scheme 90
Scheme 90

Scheme 91

Scheme 91
Scheme 91
  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. Is approx. 101 kPa (780 mmHg, 30 in.Hg) or higher or approx. 2.9 V indicated? YES - Go to step 3. NO - Intermittent failure, system is OK at this time. Check for poor connections or loose wires at the MAP sensor and the ECM/PCM.
  3. Turn the ignition switch OFF.
  4. Disconnect the MAP sensor connector.
  5. Install a jumper wire between MAP sensor 3P connector terminals No. 2 and No. 3.
  6. Turn the ignition switch ON (II).
  7. Check the MAP with the scan tool. Is approx. 159 kPa (1,190 mmHg, 47 in.Hg) or higher or 4.49 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. 2. Is there approx. 5 V? YES - Go to step 10. NO - Repair open in the wire between the ECM/PCM (C7) and the MAP sensor.
  10. Turn the ignition switch OFF.
  11. Install a jumper wire on ECM/PCM connector terminals between C7 and C17.
  12. Turn the ignition switch ON (II).
  13. Check the MAP with the scan tool. Is approx. 159 kPa (1,190 mmHg, 47 in.Hg) or higher or 4.49 V or higher indicated? YES - Substitute a known-good ECM/PCM and recheck (see «HOW TO SUBSTITUTE THE ECM/PCM FOR TESTING PURPOSES»(ref-177983-S06033682252005060900000) ). If normal MAP readings are indicated, replace the original ECM/PCM. NO - Repair open in the wire between the ECM/PCM (C17) and the MAP sensor.

DLC Circuit Troubleshooting

If the ECM/PCM does not communicate with the OBD II scan tool, Honda PGM Tester, or I/M test equipment, do this troubleshooting procedure.

Scheme 92

Scheme 92: DLC Circuit Troubleshooting
Scheme 92: DLC Circuit Troubleshooting

Scheme 93

Scheme 93
Scheme 93

Scheme 94

Scheme 94
Scheme 94

Scheme 95

Scheme 95
Scheme 95

Scheme 96

Scheme 96
Scheme 96

Scheme 97

Scheme 97
Scheme 97

Scheme 98

Scheme 98
Scheme 98
  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 ACGS (15A) 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 (G401).
  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 (G101).
  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 10 . NO - Go to step 6.
  6. Turn the ignition switch OFF.
  7. Disconnect ECM/PCM connector A (32P). Make sure the OBD II scan tool or Honda PGM Tester is disconnected from the DLC.
  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 ECM/PCM (A21). After repairing the wire, check the DTC with the OBD II scan tool/Honda PGM Tester and go to the DTC Troubleshooting index. NO - Go to step 9.
  9. Check for continuity between DLC terminal No. 7 and ECM/PCM terminal A21. Is there continuity? YES - Substitute a known-good ECM/PCM and recheck (see «HOW TO SUBSTITUTE THE ECM/PCM FOR TESTING PURPOSES»(ref-177983-S06033682252005060900000) ). If the symptom/indication goes away, replace the original ECM/PCM. NO - Repair open in the wire between DLC terminal No. 7 and the ECM/PCM (A21). After repairing the wire, check the DTC with the OBD II scan tool/Honda PGM Tester and go to the DTC Troubleshooting index.
  10. Turn the ignition switch OFF.
  11. Disconnect ECM/PCM connector A (32P). Make sure the OBD II scan tool or Honda PGM Tester is disconnected from the DLC.
  12. Turn the ignition switch ON (II).
  13. Measure voltage between DLC terminals No. 5 and No. 7. Is there 0 V? YES - Substitute a known-good ECM/PCM and recheck (see «HOW TO SUBSTITUTE THE ECM/PCM FOR TESTING PURPOSES»(ref-177983-S06033682252005060900000) ). If the symptom/indication goes away, replace the original ECM/PCM. NO - Repair short to power in the wire between the DLC terminal No. 7 and the ECM/PCM (A21). After repairing the wire, check the DTC with the OBD II scan tool/Honda PGM Tester and go to the DTC Troubleshooting index.

Scheme 99

Scheme 99: Injector Replacement
Scheme 99: Injector Replacement

Scheme 100

Scheme 100
Scheme 100
  1. Relieve fuel pressure (see «FUEL PRESSURE TEST»(ref-177932-S18215068232005060800000) ).
  2. Disconnect the connectors from the injectors (A), the EGR valve (B), and the EVAP canister purge valve (C).
  3. Disconnect the vacuum hoses and fuel return hose from the fuel pressure regulator (D) and EVAP canister purge valve. Place a rag or shop towel over the hoses before disconnecting them.
  4. Disconnect the fuel hose (E) from the fuel rail (F).
  5. Remove the retainer nuts (G) from the fuel rail and harness holder (H).
  6. Remove the EVAP canister purge valve, and disconnect the PCV valve (I).
  7. Disconnect the fuel rail.
  8. Remove the injectors from the fuel rail.
  9. Slide new cushion rings (A) onto the injectors (B).
  10. Coat new O-rings (C) with clean engine oil, and put them on the injectors.
  11. Insert the injectors into the fuel rail (D).
  12. Coat new seal rings (E) with clean engine oil, and press them into the intake manifold.
  13. Install the injectors into the intake manifold.
  14. Install and tighten the retainer nuts.
  15. Connect the fuel hose to the fuel rail with new washers.
  16. Connect the vacuum hoses and fuel return hose to the fuel pressure regulator and EVAP canister purge valve.
  17. Install the connectors on the injectors, EGR valve, and EVAP canister purge valve.
  18. Install the EVAP canister purge valve and PCV valve.
  19. Turn the ignition switch ON (II), but do not operate the starter. After the fuel pump runs for approximately 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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