How to Use the HDS (Honda Diagnostic System)
If the MIL (Malfunction Indicator Lamp) has come on
Scheme 2
Scheme 2: How to Use the HDS (Honda Diagnostic System)
Scheme 3
- Start the engine, and check the MIL (A). NOTE: If the ignition switch is turned ON (II), and the engine is not started, the MIL stays on for 15-20 seconds (see «HOW TO SET READINESS CODES»(ref-243311-S02718717432006082300000) ).
- If the MIL stays on, connect the HDS to the data link connector (DLC) (A) located under the driver's side of the dashboard.
- Turn the ignition switch ON (II).
- Make sure the HDS communicates with the PCM. If it dosen't, go to the DLC circuit troubleshooting (see «DLC CIRCUIT TROUBLESHOOTING»(ref-298125-S05538730862008091500000) )
- Check the diagnostic trouble code (DTC) and note it. Also check the freeze data and on-board snapshot data, and download any data found. Then refer to the indicated «DTC'S TROUBLESHOOTING»(ref-243311-S14366854292006082300000) , and begin the appropriate troubleshooting procedure. NOTE: Freeze data indicates the engine conditions when the first malfunction, misfire, or fuel trim malfunction was detected. The HDS can read the DTC, freeze data, current data, and other powertrain control module (PCM) data. For specific operations, refer to the user's manual that came with the HDS.
- If no DTCs are found, go to «MIL CIRCUIT TROUBLESHOOTING»(ref-298125-S30337041442008091500000) .
If the MIL did not stay on
If the MIL did not stay on but there is a driveability problem, do the symptom troubleshooting.
If you can't duplicate the DTC
Some of the troubleshooting requires you to reset the PCM and try to duplicate the DTC. If the problem is intermittent and you can't duplicate the code, do not continue through the procedure. To do so will only result in confusion and possibly, a needlessly replaced PCM.
Scan Tool Clear Command
If you are using a generic scan tool to clear commands, be aware that there is only one setting for clearing the PCM, and it clears all commands at the same time (CKP pattern learn, idle learn, readiness codes, freeze data, on-board snapshot, and DTCs). After you clear all commands, you then need to do these procedures, in this order: See PCM IDLE LEARN PROCEDURE ; CKP pattern learn procedure; Test-drive to set readiness codes to complete (see HOW TO SET READINESS CODES ).
DTC Clear
- Clear the DTC with the HDS while the engine is stopped.
- Turn the ignition switch OFF.
- Turn the ignition switch ON (II), and wait 30 seconds.
- Turn the ignition switch OFF, and disconnect the HDS from the DLC.
How to End a Troubleshooting Session (Required After Any Troubleshooting)
- Reset the PCM with the HDS.
- Do the «PCM IDLE LEARN PROCEDURE»(ref-243313-S13405059332006082300000) (see ).
- Turn the ignition switch OFF.
- Disconnect the HDS from the DLC. NOTE: The PCM is part of the immobilizer system. If you replace the PCM, it will have a different immobilizer code. In order for the engine to start, you must rewrite the immobilizer code with the HDS.
How to Troubleshoot Circuits at the PCM Connectors
Note. The PCM overwrites data and monitors the EVAP system for up to 15 minutes after the ignition switch is turned OFF. Jumping the SCS line after turning the ignition switch OFF cancels this function. Disconnecting the PCM during this function, without jumping the SCS line first, can damage the PCM.
Scheme 4
Scheme 4: How to Troubleshoot Circuits at the PCM Connectors
- Jump the SCS line with the HDS.
- Remove the cover (D) from the PCM.
- Disconnect PCM connectors A, B and C. NOTE: PCM connectors A, B, and C have a symbols (A=[], B=delta, C=o) embossed on them for identification.
- When diagnosis/troubleshooting is done at a PCM connector, use the measurement hole (A) above the terminal you need to check.
- Connect one side of the patch cord (A) terminals to a commercially available digital multimeter (B), and connect the other side of the patch cord terminals to a commercially available banna jack (Pomona Electronics Tool No. 3563 or equivalent) (C).
- Gently slide the pin probe (male) into the connector terminals from the terminal side. Do not force the tips into the terminals. NOTE: For accurate results, always use the pin probe (male). To prevent damage to the connector terminals, do not insert test equipment probes, paper clips, or other substitutes as they can damage the terminals. Damaged terminals cause a poor connection and an incorrect measurement. Do not puncture the insulation on a wire. Punctures can cause poor or intermittent electrical connections.
DTC Troubleshooting Index
Note. For DTC troubleshooting prodcedures, go to PGM-FI SYSTEM article.
| DTC (MIL indication (1) ) | Two Drive Cycle Detection | Detection Item | MIL |
|---|
| P0107 (3) | No | Manifold Absolute Pressure (MAP) Sensor Circuit Low Voltage | ON |
| P0108 (3) | No | Manifold Absolute Pressure (MAP) Sensor Circuit High Voltage | ON |
| P0111 (10) | Yes | Intake Air Temperature (IAT) Sensor Circuit Range/Performance Problem | ON |
| P0112 (10) | No | Intake Air Temperature (IAT) Sensor Circuit Low Voltage | ON |
| P0113 (10) | No | Intake Air Temperature (IAT) Sensor Circuit High Voltage | ON |
| P0116 (86) | Yes | Engine Coolant Temperature (ECT) Sensor 1 Circuit Range/Performance Problem | ON |
| P0117 (6) | No | Engine Coolant Temperature (ECT) Sensor 1 Circuit Low Voltage | ON |
| P0118 (6) | No | Engine Coolant Temperature (ECT) Sensor 1 Circuit High Voltage | ON |
| P0122 (7) | No | Throttle Position (TP) Sensor A Circuit Low Voltage | ON |
| P0123 (7) | No | Throttle Position (TP) Sensor A Circuit High Voltage | ON |
| P0125 (86) | Yes | Engine Coolant Temperature (ECT) Sensor 1 Malfunction/Slow Response | ON |
| P0128 (87) | Yes | Cooling System Malfunction | ON |
| P0133 (157) | Yes | Rear Air Fuel Ratio (A/F) Sensor (Bank 1, Sensor 1) Circuit Slow Response | ON |
| P0134 (151) | No | Rear Air Fuel Ratio (A/F) Sensor (Bank 1, Sensor 1) Heater System Malfunction | ON |
| P0135 (151) | No | Rear Air Fuel Ratio (A/F) Sensor (Bank 1, Sensor 1) Heater Circuit Malfunction | ON |
| P0137 (161) | No | Rear Secondary Heated Oxygen Sensor (Secondary HO2S (Bank 1, Sensor 2)) Circuit Low Voltage | ON |
| P0138 (161) | No | Rear Secondary Heated Oxygen Sensor (Secondary HO2S (Bank 1, Sensor 2)) Circuit High Voltage | ON |
| P0139 (161) | Yes | Rear Secondary Heated Oxygen Sensor (Secondary HO2S (Bank 1, Sensor 2)) Circuit Slow Response | ON |
| P0141 (163) | No | Rear Secondary Heated Oxygen Sensor (Secondary HO2S (Bank 1, Sensor 2)) Heater Circuit Malfunction | ON |
| P0153 (158) | Yes | Front Air Fuel Ratio (A/F) Sensor (Bank 2, Sensor 1) Circuit Slow Response | ON |
| P0154 (152) | No | Front Air Fuel Ratio (A/F) Sensor (Bank 2, Sensor 1) Heater System Malfunction | ON |
| P0155 (152) | No | Front Air Fuel Ratio (A/F) Sensor (Bank 2, Sensor 1) Heater Circuit Malfunction | ON |
| P0157 (162) | No | Front Secondary Heated Oxygen Sensor (Secondary HO2S (Bank 2, Sensor 2)) Circuit Low Voltage | ON |
| P0158 (162) | No | Front Secondary Heated Oxygen Sensor (Secondary HO2S (Bank 2, Sensor 2)) Circuit High Voltage | ON |
| P0159 (162) | Yes | Front Secondary Heated Oxygen Sensor (Secondary HO2S (Bank 2, Sensor 2)) Circuit Slow Response | ON |
| P0161 (164) | No | Front Secondary Heated Oxygen Sensor (Secondary HO2S (Bank 2, Sensor 2)) Heater Circuit Malfunction | ON |
| P0171 (153) | Yes | Rear Bank (Bank 1) Fuel System Too Lean | ON |
| P0172 (153) | Yes | Rear Bank (Bank 1) Fuel System Too Rich | ON |
| P0174 (154) | Yes | Front Bank (Bank 2) Fuel System Too Lean | ON |
| P0175 (154) | Yes | Front Bank (Bank 2) Fuel System Too Rich | ON |
| P0222 (7) | No | Throttle Position (TP) Sensor B Circuit Low Voltage | ON |
| P0223 (7) | No | Throttle Position (TP) Sensor B Circuit High Voltage | ON |
| P0300 (77) and any cobination of the following P0301 (71), P0302 (72), P0303 (73), P0304 (74), P0305 (75), P0306 (76) | Yes | Random Misfire Detected | ON |
| P0301 (71) | Yes | No. 1 Cylinder Misfire Detected | ON |
| P0302 (72) | Yes | No. 2 Cylinder Misfire Detected | ON |
| P0303 (73) | Yes | No. 3 Cylinder Misfire Detected | ON |
| P0304 (74) | Yes | No. 4 Cylinder Misfire Detected | ON |
| P0305 (75) | Yes | No. 5 Cylinder Misfire Detected | ON |
| P0306 (76) | Yes | No. 6 Cylinder Misfire Detected | ON |
| P0325 (23) | No | Knock Sensor Circuit Malfunction | ON |
| NOTE: The above DTCs are indicated when the PGM-FI system is selected in the HDS. Some automatic transmission DTCs cause the MIL to come on. If the MIL is on and no DTCs are indicated in the PGM-FI system, select the A/T system, and check for automatic transmission DTCs. (1) The above DTCs are indicated by a blinking MIL when the SCS line is jumped with the HDS. |
| NOTE |
|---|
| The above DTCs are indicated when the PGM-FI system is selected in the HDS. Some automatic transmission DTCs cause the MIL to come on. If the MIL is on and no DTCs are indicated in the PGM-FI system, select the A/T system, and check for automatic transmission DTCs. |
| (1) | The above DTCs are indicated by a blinking MIL when the SCS line is jumped with the HDS. |
DTC TROUBLESHOOTING INDEX
Note. For DTC troubleshooting prodcedures, go to PGM-FI SYSTEM article.
| DTC (MIL indication (1) ) | Two Drive Cycle Detection | Detection Item | MIL |
|---|
| P0335 (4) | No | Crankshaft Position (CKP) Sensor A No Signal | ON |
| P0339 (4) | No | Crankshaft Position (CKP) Sensor A Intermittent Interruption | ON |
| P0340 (9) | No | Camshaft Position (CMP) Sensor No Signal | ON |
| P0344 (9) | No | Camshaft Position (CMP) Sensor Intermittent Interruption | ON |
| P0385 (54) | No | Crankshaft Position (CKP) Sensor B No Signal | ON |
| P0389 (54) | No | Crankshaft Position (CKP) Sensor B Intermittent Interruption | ON |
| P0401 (80) | Yes | Exhaust Gas Recirculation (EGR) Insufficient Flow | ON |
| P0404 (12) | Yes | Exhaust Gas Recirculation (EGR) Control Circuit Range/Performance Problem | ON |
| P0406 (12) | No | Exhaust Gas Recirculation (EGR) Valve Position Sensor Circuit High Voltage | ON |
| P0420 (165) | Yes | Rear Bank Catalyst System Efficiency Below Threshold (Bank 1) | ON |
| P0430 (166) | Yes | Front Bank Catalyst System Efficiency Below Threshold (Bank 2) | ON |
| P0443 (92) | No | Evaporative Emission (EVAP) Canister Purge Valve Circuit Malfunction | ON |
| P0451 (91) | Yes | Fuel Tank Pressure (FTP) Sensor Circuit Range/Performance Problem | ON |
| P0452 (91) | No | Fuel Tank Pressure (FTP) Sensor Circuit Low Voltage | ON |
| P0453 (91) | No | Fuel Tank Pressure (FTP) Sensor Circuit High Voltage | ON |
| P0455 (90) | Yes | Evaporative Emission (EVAP) System Very Large Leak Detected | ON |
| P0456 (90) | Yes | Evaporative Emission (EVAP) System Very Small Leak Detected | ON |
| P0457 (90) | Yes | Evaporative Emission (EVAP) System Leak Detected/Fuel Fill Cap Loose or Missing | ON |
| P0461 (121) | No | Fuel Level Sensor (Fuel Gauge Sending Unit) Circuit Range/Performance Problem | OFF |
| P0462 (121) | No | Fuel Level Sensor (Fuel Gauge Sending Unit) Circuit Low Voltage | OFF |
| P0463 (121) | No | Fuel Level Sensor (Fuel Gauge Sending Unit) Circuit High Voltage | OFF |
| P0496 (92) | Yes | Evaporative Emission (EVAP) System High Purge Flow | ON |
| P0497 (90) | Yes | Evaporative Emission (EVAP) System Low Purge Flow | ON |
| P0498 (117) | No | Evaporative Emission (EVAP) Canister Vent Shut Valve Control Circuit Low Voltage | ON |
| P0499 (117) | No | Evaporative Emission (EVAP) Canister Vent Shut Valve Control Circuit High Voltage | ON |
| P0506 (14) | Yes | Idle Control System RPM Lower than Expected | ON |
| P0507 (14) | Yes | Idle Control System RPM Higher than Expected | ON |
| P0522 (22) (2) | No | Engine Oil Pressure (EOP) Sensor Circuit Low Voltage | ON |
| P0523 (22) (2) | No | Engine Oil Pressure (EOP) Sensor Circuit High Voltage | ON |
| P0562 (34) | No | Charging System Low Voltage | OFF |
| P0563 (34) | No | Powertrain Control Module (PCM) Power Source Circuit Unexpected Voltage | OFF |
| P0602 (196) | No | Powertrain Control Module (PCM) Programming Error | OFF |
| P0603 (131) | No | Powertrain Control Module (PCM) Internal Circuit Malfunction (Keep Alive Memory (KAM) Error) | ON |
| P0607 (131) | No | Lost Communication with Electronic Throttle Control System (ETCS) | ON |
| P061F (132) | No | Electronic Throttle Control System (ETCS) Malfunction | ON |
| P0630 (139) | No | VIN Not Programmed or Mismatch | ON |
| P0641 (133) | No | Sensor Reference Voltage A Malfunction | ON |
| P0685 (135) | Yes | Powertrain Control Module (PCM) Power Control Circuit/Internal Circuit Malfunction | ON |
| NOTE: The above DTCs are indicated when the PGM-FI system is selected in the HDS. Some automatic transmission DTCs cause the MIL to come on. If the MIL is on and no DTCs are indicated in the PGM-FI system, select the A/T system, and check for automatic transmission DTCs. (1) These DTCs are indicated by a blinking MIL when the SCS line is jumped with the HDS. (2) J35Z1 engine |
| NOTE |
|---|
| The above DTCs are indicated when the PGM-FI system is selected in the HDS. Some automatic transmission DTCs cause the MIL to come on. If the MIL is on and no DTCs are indicated in the PGM-FI system, select the A/T system, and check for automatic transmission DTCs. |
| (1) | These DTCs are indicated by a blinking MIL when the SCS line is jumped with the HDS. |
DTC TROUBLESHOOTING INDEX (CONT.)
Note. For DTC troubleshooting prodcedures, go to PGM-FI SYSTEM article.
| DTC (MIL indication (1) ) | Two Drive Cycle Detection | Detection Item | MIL |
|---|
| P0700 (70) (2) | No | Automatic Transaxle Control System Malfunction | ON |
| P0700 (70) | No | Automatic Transaxle Control System Malfunction | OFF |
| P0A14 (195) (3) | No | Front Engine Mount Actuator Circuit Malfunction | OFF |
| P0A15 (195) (3) | No | Front Engine Mount Actuator Control Circuit Low Current | OFF |
| P0A16 (195) (3) | No | Front Active Control Engine Mount Actuator Control Circuit High Electric Current | OFF |
| P0AB7 (195) (3) | No | Rear Engine Mount Actuator Circuit Malfunction | OFF |
| P0AB7 (195) (3) | No | Rear Engine Mount Actuator Control Circuit Low Current | OFF |
| P0AB8 (195) (3) | No | Rear Engine Mount Actuator Control Circuit High Current | OFF |
| P1077 (106) (3) | Yes | Intake Manifold Tuning (IMT) Valve Stuck in High RPM Position | ON |
| P1078 (106) (3) | Yes | Intake Manifold Tuning (IMT) Valve Stuck in Low RPM Position | ON |
| P1109 (13) | No | Barometric Pressure (BARO) Sensor Circuit Out of Range High | ON |
| P1116 (86) | Yes | Engine Coolant Temperature (ECT) Sensor 1 Performance Problem | ON |
| P1128 (5) | Yes | Manifold Absolute Pressure (MAP) Sensor Signal Lower Than Expected | ON |
| P1129 (5) | Yes | Manifold Absolute Pressure (MAP) Sensor Signal Higher Than Expected | ON |
| P1172 (157) | No | Rear Air Fuel Ratio (A/F) Sensor (Bank 1, Sensor 1) Circuit Out of Range High | ON |
| P1174 (158) | No | Front Air Fuel Ratio (A/F) Sensor (Bank 2, Sensor 1) Circuit Out of Range High | ON |
| P1297 (20) | No | Electrical Load Detector (ELD) Circuit Low Voltage | OFF |
| P1298 (20) | No | Electrical Load Detector (ELD) Circuit High Voltage | OFF |
| P1454 (91) | Yes | Fuel Tank Pressure (FTP) Sensor Circuit Range/Performance Problem | ON |
| NOTE: The above DTCs are indicated when the PGM-FI system is selected in the HDS. Some automatic transmission DTCs cause the MIL to come on. If the MIL is on and no DTCs are indicated in the PGM-FI system, select the A/T system, and check for automatic transmission DTCs. (1) These DTCs are indicated by a blinking MIL when the SCS line is jumped with the HDS. (2) The D indicator and MIL may come on simultaneously. (3) J35Z1 engine |
| NOTE |
|---|
| The above DTCs are indicated when the PGM-FI system is selected in the HDS. Some automatic transmission DTCs cause the MIL to come on. If the MIL is on and no DTCs are indicated in the PGM-FI system, select the A/T system, and check for automatic transmission DTCs. |
| (1) | These DTCs are indicated by a blinking MIL when the SCS line is jumped with the HDS. |
| (2) | The D indicator and MIL may come on simultaneously. |
DTC TROUBLESHOOTING INDEX (CONT.)
Note. For DTC troubleshooting prodcedures, go to PGM-FI SYSTEM article.
| DTC (MIL indication (1) ) | Two Drive Cycle Detection | Detection Item | MIL |
|---|
| P1549 (34) | No | Charging System High Voltage | OFF |
| P15AB (195) (2) | No | Engine Mount Control Unit Power Source Circuit Low Voltage | OFF |
| P15AC (195) (2) | No | Engine Mount Control Unit Internal Circuit Malfunction | OFF |
| P15AD (195) (2) | No | Engine Mount Control Unit Internal Circuit Malfunction | OFF |
| P15AE (195) (2) | No | Cylinder Pause Signal Malfunction | OFF |
| P15AF (195) (2) | No | Camshaft Position (CMP) Sensor Signal Malfunction | OFF |
| P15B0 (195) (2) | No | Crankshaft Position (CKP) Sensor Signal Malfunction | OFF |
| P15B1 (195) (2) | No | Camshaft Position (CMP) Sensor/Crankshaft Position (CKP) Sensor Signal Incorrect | OFF |
| P1658 (40) | No | Electronic Throttle Control System (ETCS) Control Relay ON Malfunction | ON |
| P1659 (40) | No | Electronic Throttle Control System (ETCS) Control Relay OFF Malfunction | ON |
| P1683 (40) | No | Throttle Valve Default Position Spring Performance Problem | ON |
| P1684 (40) | No | Throttle Valve Return Spring Performance Problem | ON |
| P16BB (116) | No | Alternator B Terminal Circuit Low Voltage | OFF |
| P16BC (116) | No | Alternator FR Terminal Circuit/IGP Circuit Low Voltage | OFF |
| P16C4 (195) (2) | No | Engine Mount Actuator Control Power Circuit Stuck OFF | OFF |
| P16C5 (195) (2) | No | Engine Mount Actuator Control Power Circuit Stuck ON | OFF |
| P16C6 (195) (2) | No | Engine Mount Actuator High Voltage During Function Test | OFF |
| P16C7 (195) (2) | No | Rear Engine Mount Actuator Control Circuit High Current | OFF |
| P16C8 (195) (2) | No | Front Engine Mount Actuator Control Circuit High Current | OFF |
| P16C9 (195) (2) | No | Engine Mount Control Unit Internal Circuit Malfunction | OFF |
| NOTE: The above DTCs are indicated when the PGM-FI system is selected in the HDS. Some automatic transmission DTCs cause the MIL to come on. If the MIL is on and no DTCs are indicated in the PGM-FI system, select the A/T system, and check for automatic transmission DTCs. (1) The above DTCs are indicated by a blinking MIL when the SCS line is jumped with the HDS. (2) J35Z1 engine |
| NOTE |
|---|
| The above DTCs are indicated when the PGM-FI system is selected in the HDS. Some automatic transmission DTCs cause the MIL to come on. If the MIL is on and no DTCs are indicated in the PGM-FI system, select the A/T system, and check for automatic transmission DTCs. |
| (1) | The above DTCs are indicated by a blinking MIL when the SCS line is jumped with the HDS. |
DTC TROUBLESHOOTING INDEX (CONT.)
Note. For DTC troubleshooting prodcedures, go to PGM-FI SYSTEM article.
| DTC (MIL indication (1) ) | Two Drive Cycle Detection | Detection Item | MIL |
|---|
| P2101 (40) | No | Electronic Throttle Control System (ETCS) Malfunction | ON |
| P2118 (40) | No | Throttle Actuator Current Range/Performance Problem | ON |
| P2122 (37) | No | Accelerator Pedal Position (APP) Sensor A (Throttle Position Sensor D) Circuit Low Voltage | ON |
| P2123 (37) | No | Accelerator Pedal Position (APP) Sensor A (Throttle Position Sensor D) Circuit High Voltage | ON |
| P2127 (37) | No | Accelerator Pedal Position (APP) Sensor B (Throttle Position Sensor E) Circuit Low Voltage | ON |
| P2128 (37) | No | Accelerator Pedal Position (APP) Sensor B (Throttle Position Sensor E) Circuit High Voltage | ON |
| P2135 (7) | No | Throttle Position (TP) Sensor A/B Voltage Incorrect Correlation | ON |
| P2138 (37) | No | Accelerator Pedal Position (APP) Sensor A/B (Throttle Position Sensor D/E) Incorrect Voltage Correlation | ON |
| P2176 (40) | No | Throttle Actuator Control System Idle Position Not Learned | ON |
| P2183 (192) | Yes | Engine Coolant Temperature (ECT) Sensor 2 Circuit Range/Performance Problem | ON |
| P2184 (192) | No | Engine Coolant Temperature (ECT) Sensor 2 Circuit Low Voltage | ON |
| P2185 (192) | No | Engine Coolant Temperature (ECT) Sensor 2 Circuit High Voltage | ON |
| P2195 (155) | No | Rear Air Fuel Ratio (A/F) Sensor (Bank 1, Sensor 1) Signal Stuck Lean | ON |
| P2197 (156) | No | Front Air Fuel Ratio (A/F) Sensor (Bank 2, Sensor 1) Signal Stuck Lean | ON |
| P2227 (13) | Yes | Barometric Pressure (BARO) Sensor Circuit Range/Performance Problem | ON |
| P2228 (13) | No | Barometric Pressure (BARO) Sensor Circuit Low Voltage | ON |
| P2229 (13) | No | Barometric Pressure (BARO) Sensor Circuit High Voltage | ON |
| P2237 (155) | No | Rear Air Fuel Ratio (A/F) Sensor (Bank 1, Sensor 1) IP Circuit High Voltage | ON |
| P2238 (155) | No | Rear Air Fuel Ratio (A/F) Sensor (Bank 1, Sensor 1) IP Circuit Low Voltage | ON |
| P2240 (156) | No | Front Air Fuel Ratio (A/F) Sensor (Bank 2, Sensor DIP Circuit High Voltage | ON |
| P2241 (156) | No | Front Air Fuel Ratio (A/F) Sensor (Bank 2, Sensor 1) IP Circuit Low Voltage | ON |
| P2243 (155) | No | Rear Air Fuel Ratio (A/F) Sensor (Bank 1, Sensor 1) VCENT Circuit High Voltage | ON |
| P2245 (155) | No | Rear Air Fuel Ratio (A/F) Sensor (Bank 1, Sensor 1) VCENT Circuit Low Voltage | ON |
| P2247 (156) | No | Front Air Fuel Ratio (A/F) Sensor (Bank 2, Sensor 1) VCENT Circuit High Voltage | ON |
| P2249 (156) | No | Front Air Fuel Ratio (A/F) Sensor (Bank 2, Sensor 1) VCENT Circuit Low Voltage | ON |
| P2251 (155) | No | Rear Air Fuel Ratio (A/F) Sensor (Bank 1, Sensor 1) VS Circuit High Voltage | ON |
| P2252 (155) | No | Rear Air Fuel Ratio (A/F) Sensor (Bank 1, Sensor 1) VS Circuit Low Voltage | ON |
| P2254 (156) | No | Front Air Fuel Ratio (A/F) Sensor (Bank 2, Sensor 1) VS Circuit High Voltage | ON |
| P2255 (156) | No | Front Air Fuel Ratio (A/F) Sensor (Bank 2, Sensor 1) VS Circuit Low Voltage | ON |
| NOTE: The above DTCs are indicated when the PGM-FI system is selected in the HDS. Some automatic transmission DTCs cause the MIL to come on. If the MIL is on and no DTCs are indicated in the PGM-FI system, select the A/T system, and check for automatic transmission DTCs. (1) The above DTCs are indicated by a blinking MIL when the SCS line is jumped with the HDS. |
| NOTE |
|---|
| The above DTCs are indicated when the PGM-FI system is selected in the HDS. Some automatic transmission DTCs cause the MIL to come on. If the MIL is on and no DTCs are indicated in the PGM-FI system, select the A/T system, and check for automatic transmission DTCs. |
| (1) | The above DTCs are indicated by a blinking MIL when the SCS line is jumped with the HDS. |
DTC TROUBLESHOOTING INDEX (CONT.)
Note. For DTC troubleshooting prodcedures, go to PGM-FI SYSTEM article.
| DTC (MIL indication (1) ) | Two Drive Cycle Detection | Detection Item | MIL |
|---|
| P2270 (161) | Yes | Rear Secondary Heated Oxygen Sensor (Secondary HO2S) (Bank 1, Sensor 2) Circuit Signal Stuck Lean | ON |
| P2271 (161) | Yes | Rear Secondary Heated Oxygen Sensor (Secondary HO2S) (Bank 1, Sensor 2) Circuit Signal Stuck Rich | ON |
| P2272 (162) | Yes | Front Secondary Heated Oxygen Sensor (Secondary HO2S) (Bank 2, Sensor 2) Circuit Signal Stuck Lean | ON |
| P2273 (162) | Yes | Front Secondary Heated Oxygen Sensor (Secondary HO2S) (Bank 2, Sensor 2) Circuit Signal Stuck Rich | ON |
| P2279 (109) | Yes | Intake Air System Leak | ON |
| P2413 (12) | Yes | Exhaust Gas Recirculation (EGR) System Malfunction | ON |
| P2422 (117) | Yes | Evaporative Emission (EVAP) Canister Vent Shut Valve Close Malfunction | ON |
| P2610 (132) | No | Powertrain Control Module (PCM) Internal Power Off Timer Malfunction | ON |
| P2627 (155) | No | Rear Air Fuel Ratio (A/F) Sensor (Bank 1, Sensor 1) LABEL Circuit Low Voltage | ON |
| P2628 (155) | No | Rear Air Fuel Ratio (A/F) Sensor (Bank 1, Sensor 1) LABEL Circuit High Voltage | ON |
| P2630 (156) | No | Front Air Fuel Ratio (A/F) Sensor (Bank 2, Sensor 1) LABEL Circuit Low Voltage | ON |
| P2631 (156) | No | Front Air Fuel Ratio (A/F) Sensor (Bank 2, Sensor 1) LABEL Circuit High Voltage | ON |
| P2646 (21) (2) | No | VTEC System Stuck OFF | ON |
| P2646 (22) (2) | No | Rocker Arm Oil Pressure Switch (VTEC Oil Pressure Switch) Circuit Low Voltage | ON |
| P2647 (21) (2) | No | VTEC System Stuck ON | ON |
| P2647 (22) (3) | No | Rocker Arm Oil Pressure Switch (VTEC Oil Pressure Switch) Circuit High Voltage | ON |
| P2648 (21) (2) | No | Rocker Arm Oil Control Solenoid (VTEC Solenoid Valve) Circuit High Voltage | ON |
| P2648 (21) (3) | No | Rocker Arm Oil Control Solenoid (VTEC Solenoid Valve) Circuit Low Voltage | ON |
| P2649 (21) (2) | No | Rocker Arm Oil Control Solenoid (VTEC Solenoid Valve) Circuit Low Voltage | ON |
| P2649 (21) (3) | No | Rocker Arm Oil Control Solenoid (VTEC Solenoid Valve) Circuit High Voltage | ON |
| P2A00 (157) | Yes | Rear Air Fuel Ratio (A/F) Sensor (Bank 1, Sensor 1) Range/Performance Problem | ON |
| P2A03 (158) | Yes | Front Air Fuel Ratio (A/F) Sensor (Bank 2, Sensor 1) Range/Performance Problem | ON |
| U0073 (126) | No | F-CAN Malfunction (BUS-OFF) | OFF |
| U0114 (126) (3) | No | F-CAN Malfunction (VTM-4 Control Unit-PCM) | OFF |
| U0122 (126) | No | F-CAN Malfunction (VSA Modulator-Control Unit-PCM) | OFF |
| U0155 (126) | No | F-CAN Malfunction (Gauge Control Module-PCM) | OFF |
| U1101 (126) (2) | No | F-CAN Malfunction (ACM-PCM) | OFF |
| NOTE: The above DTCs are indicated when the PGM-FI system is selected in the HDS. Some automatic transmission DTCs cause the MIL to come on. If the MIL is on and no DTCs are indicated in the PGM-FI system, select the A/T system, and check for automatic transmission DTCs. (1) The above DTCs are indicated by a blinking MIL when the SCS line is jumped with the HDS. (2) J35Z1 engine (3) J35A9 engine |
| NOTE |
|---|
| The above DTCs are indicated when the PGM-FI system is selected in the HDS. Some automatic transmission DTCs cause the MIL to come on. If the MIL is on and no DTCs are indicated in the PGM-FI system, select the A/T system, and check for automatic transmission DTCs. |
| (1) | The above DTCs are indicated by a blinking MIL when the SCS line is jumped with the HDS. |
DTC TROUBLESHOOTING INDEX (CONT.)
Symptom Troubleshooting Index
When the vehicle has one of these symptoms, check for a diagnostic trouble code (DTC) with the HDS. If there is no DTC, do the diagnostic procedure for the symptom, in the sequence listed, until you find the cause.
| Symptom | Diagnostic procedure | Also check for |
|---|
| Engine will not start (MIL works OK, no DTCs set) | Test the battery (see BATTERY TEST ). Test the starter (see STARTER SOLENOID TEST ). Check the fuel pressure (see FUEL PRESSURE TEST ). Troubleshoot the fuel pump circuit (see FUEL PUMP CIRCUIT TROUBLESHOOTING ). | Low compression No ignition spark Intake air leaks Locked up engine Broken timing belt Contaminated fuel |
| Engine will not start (MIL comes on and stays on, or never comes on at all, no DTCs set) | Troubleshoot the MIL circuit (see MIL CIRCUIT TROUBLESHOOTING ). | |
| Engine will not start (immobilizer indicator stays on or flashes) | Troubleshoot the immobilizer system (see TROUBLESHOOTING ). | |
| Engine starts but stalls immediately (MIL works OK, no DTCs set) | Troubleshoot the immobilizer system (see TROUBLESHOOTING ). | |
| Engine is hard to start (MIL works OK, no DTCs set) | Test the battery (see BATTERY TEST ). Check the fuel pressure (see FUEL PRESSURE TEST ). Clean the throttle body (see THROTTLE BODY TEST ). | Low compression Intake air leaks Contaminated fuel Weak spark |
| Cold fast idle too low (MIL works OK, no DTCs set) | Do the PCM idle learn procedure (see PCM IDLE LEARN PROCEDURE ). Check the idle speed (see IDLE SPEED INSPECTION ). Clean the throttle body (see THROTTLE BODY TEST ). | |
| Cold fast idle too high (MIL works OK, no DTCs set) | Do the PCM idle learn procedure (see PCM IDLE LEARN PROCEDURE ). Check the idle speed (see IDLE SPEED INSPECTION ). Adjust the throttle cable (see RESONATOR REMOVAL/INSTALLATION ). Do the throttle position learning check (see THROTTLE BODY TEST ). | |
| Idle speed fluctuates (MIL works OK, no DTCs set) | Do the PCM idle learn procedure (see PCM IDLE LEARN PROCEDURE ). Check the idle speed (see IDLE SPEED INSPECTION ). Adjust the throttle cable (see RESONATOR REMOVAL/INSTALLATION ). Do the carbon accumulation check (see THROTTLE BODY TEST ). Troubleshoot the A/C signal circuit (see A/C SIGNAL CIRCUIT TROUBLESHOOTING ) | Intake vacuum leaks |
| After warming up, idle speed is below specification without load (MIL works OK, no DTCs set) | Troubleshoot the alternator FR signal circuit (see ALTERNATOR FR SIGNAL CIRCUIT TROUBLESHOOTING ). Do the carbon accumulation check (see THROTTLE BODY TEST ). | |
| After warming up, idle speed is above specification without load (MIL works OK, no DTCs set) | Adjust the throttle cable (see RESONATOR REMOVAL/INSTALLATION ). Troubleshoot the alternator FR signal circuit (see ALTERNATOR FR SIGNAL CIRCUIT TROUBLESHOOTING ). Inspect the APP sensor (see APP SENSOR SIGNAL INSPECTION ) Troubleshoot the PSP switch signal circuit (see PSP SWITCH SIGNAL CIRCUIT TROUBLESHOOTING ) | |
| After warming up, idle speed drops when steering wheel is turning (MIL works OK, no DTCs set) | Do the PCM idle learn procedure (see PCM IDLE LEARN PROCEDURE ) troubleshoot the PSP switch signal circuit (see PSP SWITCH SIGNAL CIRCUIT TROUBLESHOOTING ) Do the carbon accumulation check (see THROTTLE BODY TEST ) | Power steering system problems |
| Low power (MIL works OK, no DTCs set) | Check the fuel pressure (see FUEL PRESSURE TEST ). Adjust the throttle cable (see RESONATOR REMOVAL/INSTALLATION ). | Low compression Incorrect camshaft timing Incorrect engine oil level |
| Engine stalls (MIL works OK, no DTCs set) | Do the PCM idle learn procedure (see PCM IDLE LEARN PROCEDURE ). Check the fuel pressure (see FUEL PRESSURE TEST ). Check the idle speed (see IDLE SPEED INSPECTION ). Troubleshoot the brake pedal position switch signal circuit (see BRAKE PEDAL POSITION SWITCH SIGNAL CIRCUIT TROUBLESHOOTING ). | Intake air leaks Faulty harness and sensor connections |
| Difficult to refuel (MIL works OK, no DTCs set) | Check the fuel vent tube between the EVAP canister and the fuel tank. Check the fuel tank vapor recirculation tube between the fuel pipe and the fuel tank. Replace the fuel tank (see FUEL TANK REPLACEMENT ). | Malfunctioning gas station filling nozzle. |
| Fuel overflows during refueling (No DTCs set) | Replace the fuel tank (see FUEL TANK REPLACEMENT ). | Malfunctioning gas station filling nozzle. |
| Abnormal vibration from engine to body (MIL works OK) (J35Z1) | Inspect the vibration from engine mount (see ENGINE MOUNT VIBRATION AND NOISE INSPECTION ) | |
SYMPTOM TROUBLESHOOTING INDEX
Self-diagnosis
The PCM detects a failure of a signal from a sensor or from another control unit and stores a Temporary DTC or a DTC in erasable memory (RAM). Depending on the failure, a DTC is stored in the first or the second drive cycle. When a DTC is stored, the PCM turns on the malfunction indicator lamp (MIL) by supplying ground to the MIL circuit.
- One Drive Cycle Detection Method When an abnormality occurs in the signal from a sensor or from another control unit, the PCM stores a DTC for the failure in the RAM and turns on the MIL immediately.
- Two Drive Cycle Detection Method When an abnormality occurs in the signal from a sensor or from another control unit in first drive cycle, the PCM stores a temporary DTC for the failure in RAM. The MIL does not come on at this time. If the failure continues in the second drive cycle, the PCM stores a DTC in erasable memory and turns on the MIL.
