Water Sprinkling Method
If malfunction occurs only during high humidity or rainy/snowy weather, perform the following steps.
| CAUTION | Indirectly change the temperature and humidity by spraying water onto the front of the radiator. If a vehicle is subject to water leakage, the leakage may damage the control module. When testing a vehicle with a water leakage problem, special caution must be used. |
Scheme 151
- Connect the M-MDS to the DLC-2 if you are inspecting sensors or switches.
- Turn ignition switch to ON position (Engine OFF). NOTE: If engine starts and runs, perform the following steps at idle.
- Access PIDs for sensor or switch if you are inspecting sensors or switches.
- If you are inspecting the switch, turn it on manually.
- Spray water onto the vehicle or run it through a car wash. If the PID value is unstable or malfunction occurs, repair or replace part as necessary.
NO. 1 MELTING OF MAIN OR OTHER FUSES [AJ]
MELTING OF MAIN OR OTHER FUSES [AJ] 1 Melting of main or other fuses [TROUBLESHOOTING HINTS] Inspect condition of fuse
Scheme 152
Scheme 152: NO. 1 MELTING OF MAIN OR OTHER FUSES [AJ]
| Damaged fuse | Related wiring harness |
|---|
| MAIN | MAIN fuse BTN fuse IG KEY2 fuse IG1 fuse FAN1 fuse FAN2 fuse Generator |
| BTN | BTN fuse ROOM fuse |
| ROOM | ROOM fuse DLC-2 |
| IG KEY2 | IG KEY2 fuse Ignition switch Starter relay |
| IG KEY1 | IG KEY1 fuse Ignition switch ENGINE fuse Starter relay |
| ENGINE | ENGINE fuse Fuel pump relay Ignition coils Capacitor |
| FUEL PUMP | FUEL PUMP fuse Fuel pump relay Main relay |
| IG1 | IG1 fuse IG1 fuse |
| FAN1 | FAN1 fuse Cooling fan relay |
| FAN2 | FAN2 fuse Cooling fan relay |
| ETC | ETC fuse Drive-by-wire relay |
| INJ | INJ fuse Drive-by-wire relay PCM Fuel injectors |
| ENG BAR | ENG BAR fuse Purge solenoid valve VAD control solenoid valve EGR boost sensor solenoid valve MAF/IAT sensor EGR valve OCV (RH) OCV (LH) EVAP system leak detection pump |
| ENG BB | ENG BB fuse Cooling fan relay |
| If malfunction remains, refer to related Service Bulletins and/or On-line Repair Information and perform repair or diagnosis. If vehicle is repaired, troubleshooting completed. If vehicle is not repaired or additional diagnostic information is not available, reprogram PCM if later calibration is available. Retest. |
NO. 2 MIL ILLUMINATES [AJ]
| 2 | MIL illuminates |
|---|
| DESCRIPTION | MIL illuminates. |
| POSSIBLE CAUSE | PCM illuminates MIL for emission-related concern (DTCs are stored in PCM) Short to GND circuit between MIL (located on instrument cluster) and PCM NOTE: If MIL blinks at steady rate, misfire condition could possibly exist. |
| NOTE |
|---|
| If MIL blinks at steady rate, misfire condition could possibly exist. |
POSSIBLE CAUSES DESCRIPTIONS
NO. 3 WILL NOT CRANK [AJ]
| 3 | Will not crank |
|---|
| DESCRIPTION | Starter does not work. |
| POSSIBLE CAUSE | Open starter circuit between ignition switch and starter TR switch malfunction (ATX) TR switch misadjustment (ATX) Low or dead battery Charging system malfunction Starter interlock switch malfunction (MTX) Starter malfunction Seized/hydro locked engine, flywheel or drive plate Immobilizer system (PATS) and/or circuit malfunction |
POSSIBLE CAUSES DESCRIPTIONS
NO. 4 HARD START/LONG CRANK/ERRATIC START/ERRATIC CRANK [AJ]
| 4 | Hard start/long crank/erratic start/erratic crank |
|---|
| DESCRIPTION | Starter cranks engine at normal speed but engine requires excessive cranking time before start. Battery is in normal condition. |
| POSSIBLE CAUSE | Erratic signal to ignition coil Vacuum leakage Poor fuel quality Starting system malfunction Spark plug malfunction Air leakage from intake-air system Erratic signal from CKP sensor Erratic signal from CMP sensor Improper air/fuel mixture ratio control Air cleaner restriction Improper operation of electronic throttle control system PCV valve malfunction Inadequate fuel pressure Purge solenoid valve malfunction MAF sensor contamination Restriction in exhaust system EGR valve malfunction Pressure regulator malfunction WARNING: The following troubleshooting flow chart contains the fuel system diagnosis and repair procedures. Read the following warnings before performing the fuel system services: Fuel vapor is hazardous. It can easily ignite, causing serious injury and damage. Always keep sparks and flames away from fuel. Fuel line spills and leakage are dangerous. Fuel can ignite and cause serious injuries or death and damage. Fuel can also irritate skin and eyes. To prevent this, always complete "BEFORE REPAIR PROCEDURE" and "AFTER REPAIR PROCEDURE" described in this manual. (See BEFORE REPAIR PROCEDURE [L3, AJ] ). (See AFTER REPAIR PROCEDURE [L3, AJ] ). CAUTION: Disconnecting/connecting quick release connector without cleaning it may possibly cause damage to fuel pipe and quick release connector. Always clean quick release connector joint area before disconnecting/connecting, and make sure that it is free of foreign material. |
| WARNING |
|---|
| The following troubleshooting flow chart contains the fuel system diagnosis and repair procedures. Read the following warnings before performing the fuel system services: Fuel vapor is hazardous. It can easily ignite, causing serious injury and damage. Always keep sparks and flames away from fuel. Fuel line spills and leakage are dangerous. Fuel can ignite and cause serious injuries or death and damage. Fuel can also irritate skin and eyes. To prevent this, always complete "BEFORE REPAIR PROCEDURE" and "AFTER REPAIR PROCEDURE" described in this manual. (See BEFORE REPAIR PROCEDURE [L3, AJ] ). (See AFTER REPAIR PROCEDURE [L3, AJ] ). |
| CAUTION |
|---|
| Disconnecting/connecting quick release connector without cleaning it may possibly cause damage to fuel pipe and quick release connector. Always clean quick release connector joint area before disconnecting/connecting, and make sure that it is free of foreign material. |
POSSIBLE CAUSES DESCRIPTION
NO. 5 ENGINE STALLS-AFTER START/AT IDLE [AJ]
| 5 | Engine stalls-after start/at Idle |
|---|
| DESCRIPTION | Engine stops unexpectedly. |
| POSSIBLE CAUSE | A/C system operation is improper Air leakage from intake-air system parts Purge solenoid valve malfunction Improper operation of electronic throttle control system EGR valve malfunction No signal from CKP sensor due to sensor or related wire Vacuum leakage Low engine compression Erratic signal to ignition coil Poor fuel quality PCV valve malfunction Air cleaner restriction Restriction in exhaust system Electrical connector disconnection Open or short circuit in fuel pump body and related harness No battery power supply to PCM or poor GND Inadequate fuel pressure Fuel pump body mechanical malfunction Fuel leakage from fuel injector Fuel injector clogging Immobilizer system (PATS) and/or circuit malfunction Ignition coil malfunction Improper air/fuel ratio control Improper valve timing Improper operation of variable valve timing control system. Pressure regulator malfunction WARNING: The following troubleshooting flow chart contains the fuel system diagnosis and repair procedures. Read the following warnings before performing the fuel system services: Fuel vapor is hazardous. It can easily ignite, causing serious injury and damage. Always keep sparks and flames away from fuel. Fuel line spills and leakage are dangerous. Fuel can ignite and cause serious injuries or death and damage. Fuel can also irritate skin and eyes. To prevent this, always complete "BEFORE REPAIR PROCEDURE" and "AFTER REPAIR PROCEDURE" described in this manual. (See BEFORE REPAIR PROCEDURE [L3, AJ] ). (See AFTER REPAIR PROCEDURE [L3, AJ] ). CAUTION: Disconnecting/connecting quick release connector without cleaning it may possibly cause damage to fuel pipe and quick release connector. Always clean quick release connector joint area before disconnecting/connecting, and make sure that it is free of foreign material. |
| WARNING |
|---|
| The following troubleshooting flow chart contains the fuel system diagnosis and repair procedures. Read the following warnings before performing the fuel system services: Fuel vapor is hazardous. It can easily ignite, causing serious injury and damage. Always keep sparks and flames away from fuel. Fuel line spills and leakage are dangerous. Fuel can ignite and cause serious injuries or death and damage. Fuel can also irritate skin and eyes. To prevent this, always complete "BEFORE REPAIR PROCEDURE" and "AFTER REPAIR PROCEDURE" described in this manual. (See BEFORE REPAIR PROCEDURE [L3, AJ] ). (See AFTER REPAIR PROCEDURE [L3, AJ] ). |
| CAUTION |
|---|
| Disconnecting/connecting quick release connector without cleaning it may possibly cause damage to fuel pipe and quick release connector. Always clean quick release connector joint area before disconnecting/connecting, and make sure that it is free of foreign material. |
POSSIBLE CAUSES DESCRIPTION
NO. 6 CRANKS NORMALLY BUT WILL NOT START [AJ]
| 6 | Cranks normally but will not start |
|---|
| DESCRIPTION | Starter cranks Engine at normal speed but engine will not run. Refer to symptom troubleshooting " NO. 5 ENGINE STALLS " if this symptom appears after engine stall. Fuel in tank. Battery is in normal condition. |
| POSSIBLE CAUSE | No battery power supply to PCM Air leakage from intake-air system Open PCM GND or vehicle body GND Improper operation of electronic throttle control system EGR valve malfunction No signal from CKP sensor due to sensor or related wire No signal from CMP sensor due to sensor or related wire Low engine compression Vacuum leakage Poor fuel quality PCV valve malfunction Air cleaner restriction Restriction in exhaust system Disconnected electrical connector Open or short circuit in fuel pump and related harness Inadequate fuel pressure Fuel pump mechanical malfunction Fuel leakage from injector Fuel injector clogging Purge solenoid valve malfunction Ignition coil malfunction Improper air/fuel ratio control Improper valve timing Improper operation of variable valve timing control system Immobilizer system (PATS) and/or circuit malfunction Pressure regulator malfunction WARNING: The following troubleshooting flow chart contains the fuel system diagnosis and repair procedures. Read the following warnings before performing the fuel system services: Fuel vapor is hazardous. It can easily ignite, causing serious injury and damage. Always keep sparks and flames away from fuel. Fuel line spills and leakage are dangerous. Fuel can ignite and cause serious injuries or death and damage. Fuel can also irritate skin and eyes. To prevent this, always complete "BEFORE REPAIR PROCEDURE" and "AFTER REPAIR PROCEDURE" described in this manual. (See BEFORE REPAIR PROCEDURE [L3, AJ] ). (See AFTER REPAIR PROCEDURE [L3, AJ] ). CAUTION: Disconnecting/connecting quick release connector without cleaning it may possibly cause damage to fuel pipe and quick release connector. Always clean quick release connector joint area before disconnecting/connecting, and make sure that it is free of foreign material. |
| WARNING |
|---|
| The following troubleshooting flow chart contains the fuel system diagnosis and repair procedures. Read the following warnings before performing the fuel system services: Fuel vapor is hazardous. It can easily ignite, causing serious injury and damage. Always keep sparks and flames away from fuel. Fuel line spills and leakage are dangerous. Fuel can ignite and cause serious injuries or death and damage. Fuel can also irritate skin and eyes. To prevent this, always complete "BEFORE REPAIR PROCEDURE" and "AFTER REPAIR PROCEDURE" described in this manual. (See BEFORE REPAIR PROCEDURE [L3, AJ] ). (See AFTER REPAIR PROCEDURE [L3, AJ] ). |
| CAUTION |
|---|
| Disconnecting/connecting quick release connector without cleaning it may possibly cause damage to fuel pipe and quick release connector. Always clean quick release connector joint area before disconnecting/connecting, and make sure that it is free of foreign material. |
POSSIBLE CAUSES DESCRIPTIONS
NO. 7 SLOW RETURN TO IDLE [AJ]
| 7 | Slow return to idle |
|---|
| DESCRIPTION | Engine takes more time than normal to return to idle speed. |
| POSSIBLE CAUSE | ECT sensor malfunction Thermostat is stuck open. Throttle body malfunction Air leakage from intake-air system |
POSSIBLE CAUSES DESCRIPTIONS
NO. 8 ENGINE RUNS ROUGH/ROLLING IDLE [AJ]
| 8 | Engine runs rough/rolling idle |
|---|
| DESCRIPTION | Engine speed fluctuates between specified idle speed and lower speed and engine shakes excessively. Idle speed is too slow and engine shakes excessively. |
| POSSIBLE CAUSE | Air leakage from intake-air system parts A/C system improper operation Spark plug malfunction Erratic signal to ignition coil Purge solenoid valve malfunction Improper operation of electronic throttle control system EGR valve malfunction Erratic or no signal from CMP sensor Low engine compression Improper valve timing Improper operation of valve timing control system Erratic signal from CKP sensor Poor fuel quality PCV valve malfunction Air cleaner restriction Restriction in exhaust system Disconnected electrical connectors Inadequate fuel pressure Fuel pump mechanical malfunction Improper load signal input Fuel line restriction or clogging Improper operation or fuel injection control Fuel leakage from fuel injector Fuel injector clogging Engine overheating Vacuum leakage Pressure regulator malfunction WARNING: The following troubleshooting flow chart contains the fuel system diagnosis and repair procedures. Read the following warnings before performing the fuel system services: Fuel vapor is hazardous. It can easily ignite, causing serious injury and damage. Always keep sparks and flames away from fuel. Fuel line spills and leakage are dangerous. Fuel can ignite and cause serious injuries or death and damage. Fuel can also irritate skin and eyes. To prevent this, always complete "BEFORE REPAIR PROCEDURE" and "AFTER REPAIR PROCEDURE" described in this manual. (See BEFORE REPAIR PROCEDURE [L3, AJ] ). (See AFTER REPAIR PROCEDURE [L3, AJ] ). CAUTION: Disconnecting/connecting quick release connector without cleaning it may possibly cause damage to fuel pipe and quick release connector. Always clean quick release connector joint area before disconnecting/connecting, and make sure that it is free of foreign material. |
| WARNING |
|---|
| The following troubleshooting flow chart contains the fuel system diagnosis and repair procedures. Read the following warnings before performing the fuel system services: Fuel vapor is hazardous. It can easily ignite, causing serious injury and damage. Always keep sparks and flames away from fuel. Fuel line spills and leakage are dangerous. Fuel can ignite and cause serious injuries or death and damage. Fuel can also irritate skin and eyes. To prevent this, always complete "BEFORE REPAIR PROCEDURE" and "AFTER REPAIR PROCEDURE" described in this manual. (See BEFORE REPAIR PROCEDURE [L3, AJ] ). (See AFTER REPAIR PROCEDURE [L3, AJ] ). |
| CAUTION |
|---|
| Disconnecting/connecting quick release connector without cleaning it may possibly cause damage to fuel pipe and quick release connector. Always clean quick release connector joint area before disconnecting/connecting, and make sure that it is free of foreign material. |
POSSIBLE CAUSES DESCRIPTIONS
NO. 9 FAST IDLE/RUNS ON [AJ]
| 9 | Fast idle/runs on |
|---|
| DESCRIPTION | Engine speed continues at fast idle after warm-up. Engine runs after ignition switch is turned to OFF position. |
| POSSIBLE CAUSE | ECT sensor malfunction Air leakage from intake-air system Throttle body malfunction APP sensor misadjustment Cruise control system operation improperly Improper operation of electronic throttle control system |
POSSIBLE CAUSES DESCRIPTIONS
NO. 10 LOW IDLE/STALLS DURING DECELERATION [AJ]
| 10 | Low idle/stalls during deceleration |
|---|
| DESCRIPTION | Engine stops unexpectedly at beginning of deceleration or recovery from deceleration. |
| POSSIBLE CAUSE | Vacuum leakage Improper operation of electronic throttle control system Air leakage from intake-air system Improper air/fuel ratio mixture control EVAP control system malfunction APP sensor or related circuit malfunction APP sensor misadjustment Neutral/clutch switch or related circuit malfunction (MTX) TR switch or related circuit malfunction (ATX) TP sensor or related circuit malfunction MAF sensor or related circuit malfunction Brake switch or related circuit malfunction Improper operation of A/C magnetic clutch |
POSSIBLE CAUSES DESCRIPTIONS
NO. 11 ENGINE STALLS/QUITS, ENGINE RUNS ROUGH, MISSES, BUCK/JERK, HESITATION/STUMBLE, SURGES [AJ]
| 11 | Engine stalls/quits-acceleration/cruise Engine runs rough-acceleration/cruise Misses-acceleration/cruise Buck/jerk-acceleration/cruise/deceleration Hesitation/stumble-acceleration Surges-acceleration/cruise |
|---|
| DESCRIPTION | Engine stops unexpectedly at beginning of acceleration or during acceleration. Engine stops unexpectedly while cruising. Engine speed fluctuates during acceleration or cruising. Engine misses during acceleration or cruising. Vehicle bucks/jerks during acceleration, cruising or deceleration. Momentary pause at beginning of acceleration or during acceleration Momentary minor irregularity in engine output |
| POSSIBLE CAUSE | A/C system improper operation Erratic signal or no signal from CMP sensor Air leakage from intake-air system parts Purge solenoid valve malfunction Improper operation of electronic throttle control system EGR valve malfunction Erratic signal from CKP sensor Low engine compression Vacuum leakage Poor fuel quality Main relay intermittent malfunction Throttle body malfunction Engine overheating Spark plug malfunction Improper air/fuel mixture control operation Erratic signal to ignition coil Air cleaner restriction PCV valve malfunction Improper valve timing due to jumping out of timing belt Restriction in exhaust system Intermittent open or short in fuel pump circuit Inadequate fuel pressure Fuel line and/or fuel filter restriction or clogging Pressure regulator malfunction APP sensor misadjustment TP sensor misadjustment Fuel pump mechanical malfunction Fuel leakage from fuel injector Fuel injector clogging Intermittent open or short of MAF sensor, APP sensor, TP sensor and VSS ATX malfunction (ATX) Clutch slippage (MTX) WARNING: The following troubleshooting flow chart contains the fuel system diagnosis and repair procedures. Read the following warnings before performing the fuel system services: Fuel vapor is hazardous. It can easily ignite, causing serious injury and damage. Always keep sparks and flames away from fuel. Fuel line spills and leakage are dangerous. Fuel can ignite and cause serious injuries or death and damage. Fuel can also irritate skin and eyes. To prevent this, always complete "BEFORE REPAIR PROCEDURE" and "AFTER REPAIR PROCEDURE" described in this manual. (See BEFORE REPAIR PROCEDURE [L3, AJ] ). (See AFTER REPAIR PROCEDURE [L3, AJ] ). CAUTION: Disconnecting/connecting quick release connector without cleaning it may possibly cause damage to fuel pipe and quick release connector. Always clean quick release connector joint area before disconnecting/connecting, and make sure that it is free of foreign material. |
| WARNING |
|---|
| The following troubleshooting flow chart contains the fuel system diagnosis and repair procedures. Read the following warnings before performing the fuel system services: Fuel vapor is hazardous. It can easily ignite, causing serious injury and damage. Always keep sparks and flames away from fuel. Fuel line spills and leakage are dangerous. Fuel can ignite and cause serious injuries or death and damage. Fuel can also irritate skin and eyes. To prevent this, always complete "BEFORE REPAIR PROCEDURE" and "AFTER REPAIR PROCEDURE" described in this manual. (See BEFORE REPAIR PROCEDURE [L3, AJ] ). (See AFTER REPAIR PROCEDURE [L3, AJ] ). |
| CAUTION |
|---|
| Disconnecting/connecting quick release connector without cleaning it may possibly cause damage to fuel pipe and quick release connector. Always clean quick release connector joint area before disconnecting/connecting, and make sure that it is free of foreign material. |
POSSIBLE CAUSES DESCRIPTIONS
NO. 12 LACK/LOSS OF POWER-ACCELERATION/CRUISE [AJ]
| 12 | Lack/loss of power-acceleration/cruise |
|---|
| DESCRIPTION | Performance is poor under load (e.g. power down when climbing hills). |
| POSSIBLE CAUSE | Improper A/C system operation Erratic signal or no signal from CMP sensor Air leakage from intake-air system parts Improper operation of electronic throttle control system Purge control solenoid malfunction EGR valve malfunction Brake dragging Erratic signal from CKP sensor Low engine compression Vacuum leakage Poor fuel quality Erratic signal ignition coil Engine overheating Throttle body malfunction Spark plug malfunction Air cleaner restriction PCV valve malfunction Improper valve timing due to jumping out of timing belt Improper operation of variable valve timing control system Restriction in exhaust system Intermittent open or short in fuel pump circuit Inadequate fuel pressure Fuel pump mechanical malfunction Fuel line restriction or clogging Fuel leakage from fuel injector Fuel injector clogging Intermittent open or short of MAF sensor, APP sensor, TP sensor and VSS ATX malfunction (ATX) Clutch slippage (MTX) WARNING: The following troubleshooting flow chart contains the fuel system diagnosis and repair procedures. Read the following warnings before performing the fuel system services: Fuel vapor is hazardous. It can easily ignite, causing serious injury and damage. Always keep sparks and flames away from fuel. Fuel line spills and leakage are dangerous. Fuel can ignite and cause serious injuries or death and damage. Fuel can also irritate skin and eyes. To prevent this, always complete "BEFORE REPAIR PROCEDURE" and "AFTER REPAIR PROCEDURE" described in this manual. (See BEFORE REPAIR PROCEDURE [L3, AJ] ). (See AFTER REPAIR PROCEDURE [L3, AJ] ). CAUTION: Disconnecting/connecting quick release connector without cleaning it may possibly cause damage to fuel pipe and quick release connector. Always clean quick release connector joint area before disconnecting/connecting, and make sure that it is free of foreign material. |
| WARNING |
|---|
| The following troubleshooting flow chart contains the fuel system diagnosis and repair procedures. Read the following warnings before performing the fuel system services: Fuel vapor is hazardous. It can easily ignite, causing serious injury and damage. Always keep sparks and flames away from fuel. Fuel line spills and leakage are dangerous. Fuel can ignite and cause serious injuries or death and damage. Fuel can also irritate skin and eyes. To prevent this, always complete "BEFORE REPAIR PROCEDURE" and "AFTER REPAIR PROCEDURE" described in this manual. (See BEFORE REPAIR PROCEDURE [L3, AJ] ). (See AFTER REPAIR PROCEDURE [L3, AJ] ). |
| CAUTION |
|---|
| Disconnecting/connecting quick release connector without cleaning it may possibly cause damage to fuel pipe and quick release connector. Always clean quick release connector joint area before disconnecting/connecting, and make sure that it is free of foreign material. |
POSSIBLE CAUSES DESCRIPTIONS
NO. 13 KNOCKING/PINGING-ACCELERATION/CRUISE [AJ]
| 13 | Knocking/pinging-acceleration/cruise |
|---|
| DESCRIPTION | Sound is produced when air/fuel mixture is ignited by something other than spark plug (e.g. hot spot in combustion chamber). |
| POSSIBLE CAUSE | Engine overheating due to cooling system malfunction ECT sensor malfunction IAT sensor malfunction MAF sensor malfunction Erratic signal from CMP sensor Inadequate engine compression Inadequate fuel pressure KS and related circuit malfunction WARNING: The following troubleshooting flow chart contains the fuel system diagnosis and repair procedures. Read the following warnings before performing the fuel system services: Fuel vapor is hazardous. It can easily ignite, causing serious injury and damage. Always keep sparks and flames away from fuel. Fuel line spills and leakage are dangerous. Fuel can ignite and cause serious injuries or death and damage. Fuel can also irritate skin and eyes. To prevent this, always complete "BEFORE REPAIR PROCEDURE" and "AFTER REPAIR PROCEDURE" described in this manual. (See BEFORE REPAIR PROCEDURE [L3, AJ] ). (See AFTER REPAIR PROCEDURE [L3, AJ] ). CAUTION: Disconnecting/connecting quick release connector without cleaning it may possibly cause damage to fuel pipe and quick release connector. Always clean quick release connector joint area before disconnecting/connecting, and make sure that it is free of foreign material. |
| WARNING |
|---|
| The following troubleshooting flow chart contains the fuel system diagnosis and repair procedures. Read the following warnings before performing the fuel system services: Fuel vapor is hazardous. It can easily ignite, causing serious injury and damage. Always keep sparks and flames away from fuel. Fuel line spills and leakage are dangerous. Fuel can ignite and cause serious injuries or death and damage. Fuel can also irritate skin and eyes. To prevent this, always complete "BEFORE REPAIR PROCEDURE" and "AFTER REPAIR PROCEDURE" described in this manual. (See BEFORE REPAIR PROCEDURE [L3, AJ] ). (See AFTER REPAIR PROCEDURE [L3, AJ] ). |
| CAUTION |
|---|
| Disconnecting/connecting quick release connector without cleaning it may possibly cause damage to fuel pipe and quick release connector. Always clean quick release connector joint area before disconnecting/connecting, and make sure that it is free of foreign material. |
POSSIBLE CAUSES DESCRIPTIONS
NO. 14 POOR FUEL ECONOMY [AJ]
| 14 | Poor fuel economy |
|---|
| DESCRIPTION | Fuel economy is unsatisfactory. |
| POSSIBLE CAUSE | Contaminated air cleaner element Engine cooling system malfunction Improper ATF level (ATX) Weak spark Poor fuel quality Erratic or no signal from CMP sensor Clutch slippage (MTX) Improper operation of variable valve timing control system Improper coolant level Inadequate fuel pressure Spark plug malfunction PCV valve malfunction Brake dragging Improper valve timing due to jumping out of timing belt Contaminated MAF sensor Improper engine compression Exhaust system clogging WARNING: The following troubleshooting flow chart contains the fuel system diagnosis and repair procedures. Read the following warnings before performing the fuel system services: Fuel vapor is hazardous. It can easily ignite, causing serious injury and damage. Always keep sparks and flames away from fuel. Fuel line spills and leakage are dangerous. Fuel can ignite and cause serious injuries or death and damage. Fuel can also irritate skin and eyes. To prevent this, always complete "BEFORE REPAIR PROCEDURE" and "AFTER REPAIR PROCEDURE" described in this manual. (See BEFORE REPAIR PROCEDURE [L3, AJ] ). (See AFTER REPAIR PROCEDURE [L3, AJ] ). CAUTION: Disconnecting/connecting quick release connector without cleaning it may possibly cause damage to fuel pipe and quick release connector. Always clean quick release connector joint area before disconnecting/connecting, and make sure that if is free of foreign material. |
| WARNING |
|---|
| The following troubleshooting flow chart contains the fuel system diagnosis and repair procedures. Read the following warnings before performing the fuel system services: Fuel vapor is hazardous. It can easily ignite, causing serious injury and damage. Always keep sparks and flames away from fuel. Fuel line spills and leakage are dangerous. Fuel can ignite and cause serious injuries or death and damage. Fuel can also irritate skin and eyes. To prevent this, always complete "BEFORE REPAIR PROCEDURE" and "AFTER REPAIR PROCEDURE" described in this manual. (See BEFORE REPAIR PROCEDURE [L3, AJ] ). (See AFTER REPAIR PROCEDURE [L3, AJ] ). |
| CAUTION |
|---|
| Disconnecting/connecting quick release connector without cleaning it may possibly cause damage to fuel pipe and quick release connector. Always clean quick release connector joint area before disconnecting/connecting, and make sure that if is free of foreign material. |
POSSIBLE CAUSES DESCRIPTIONS
NO. 15 EMISSION COMPLIANCE [AJ]
| 15 | Emission compliance |
|---|
| DESCRIPTION | Emission compliance test failed. |
| POSSIBLE CAUSE | Vacuum lines leakage or blockage Cooling system malfunction Spark plug malfunction Air leakage from intake manifold Erratic or no signal from CMP sensor Inadequate fuel pressure PCV valve malfunction or incorrect valve installation EGR valve malfunction Exhaust system clogging Fuel tank ventilation system malfunction Charcoal canister damage Air cleaner element clogging or restriction Throttle body malfunction Ignition coil or related circuit malfunction. Improper air/fuel mixture ratio control operation Excessive carbon built up in combustion chamber Improper engine compression Improper valve timing Catalyst converter malfunction Engine internal parts malfunction WARNING: The following troubleshooting flow chart contains the fuel system diagnosis and repair procedures. Read the following warnings before performing the fuel system services: Fuel vapor Is hazardous. It can easily ignite, causing serious injury and damage. Always keep sparks and flames away from fuel. Fuel line spills and leakage are dangerous. Fuel can ignite and cause serious injuries or death and damage. Fuel can also irritate skin and eyes. To prevent this, always complete "BEFORE REPAIR PROCEDURE" and "AFTER REPAIR PROCEDURE" described in this manual. (See BEFORE REPAIR PROCEDURE [L3, AJ] ). (See AFTER REPAIR PROCEDURE [L3, AJ] ). CAUTION: Disconnecting/connecting quick release connector without cleaning it may possibly cause damage to fuel pipe and quick release connector. Always clean quick release connector joint area before disconnecting/connecting, and make sure that it is free of foreign material. |
| WARNING |
|---|
| The following troubleshooting flow chart contains the fuel system diagnosis and repair procedures. Read the following warnings before performing the fuel system services: Fuel vapor Is hazardous. It can easily ignite, causing serious injury and damage. Always keep sparks and flames away from fuel. Fuel line spills and leakage are dangerous. Fuel can ignite and cause serious injuries or death and damage. Fuel can also irritate skin and eyes. To prevent this, always complete "BEFORE REPAIR PROCEDURE" and "AFTER REPAIR PROCEDURE" described in this manual. (See BEFORE REPAIR PROCEDURE [L3, AJ] ). (See AFTER REPAIR PROCEDURE [L3, AJ] ). |
| CAUTION |
|---|
| Disconnecting/connecting quick release connector without cleaning it may possibly cause damage to fuel pipe and quick release connector. Always clean quick release connector joint area before disconnecting/connecting, and make sure that it is free of foreign material. |
POSSIBLE CAUSES DESCRIPTIONS
NO. 16 HIGH OIL CONSUMPTION/LEAKAGE [AJ]
| 16 | High oil consumption/leakage |
|---|
| DESCRIPTION | Oil consumption is excessive. |
| POSSIBLE CAUSE | PCV valve malfunction Improper dipstick Improper engine oil viscosity Engine internal part malfunction |
POSSIBLE CAUSES DESCRIPTIONS
NO. 17 COOLING SYSTEM CONCERNS-OVERHEATING [AJ]
| 17 | Cooling system concerns-overheating |
|---|
| DESCRIPTION | Engine runs at higher than normal temperature/overheats. |
| POSSIBLE CAUSE | Improper coolant level Blown fuses Coolant leakage Excessive A/C system pressure A/C system operation is improper. Improper water/anti-freeze mixture Fans reverse rotation Poor radiator condition Thermostat malfunction Radiator hoses damage Condenser fan is inoperative. Improper or damaged radiator cap Cooling fan is inoperative. Coolant overflow system malfunction Improper tension of drive belt Drive belt damage Fan control module malfunction |
POSSIBLE CAUSES DESCRIPTIONS
NO. 18 COOLING SYSTEM CONCERNS-RUNS COLD [AJ]
| 18 | Cooling system concerns-runs cold |
|---|
| DESCRIPTION | Engine takes excessive time to reach normal operating temperature. |
| POSSIBLE CAUSE | Thermostat malfunction Condenser fan system malfunction Cooling fan system malfunction |
POSSIBLE CAUSES DESCRIPTIONS
NO. 19 EXHAUST SMOKE [AJ]
| 19 | Exhaust smoke |
|---|
| DESCRIPTION | Blue, black, or white smoke from exhaust system |
| POSSIBLE CAUSE | Blue smoke (Burning oil): PCV valve malfunction Engine internal oil leakage White smoke (Water in combustion): Cooling system malfunction (coolant loss) Engine internal coolant leakage Black smoke (Rich fuel mixture): Air cleaner is restricted. Intake-air system collapsed or restricted. Fuel return line-is restricted. Excessive fuel pressure Improper engine compression Injector fuel leakage Ignition system malfunction WARNING: The following troubleshooting flow chart contains the fuel system diagnosis and repair procedures. Read the following warnings before performing the fuel system services: Fuel vapor Is hazardous. It can easily ignite, causing serious injury and damage. Always keep sparks and flames away from fuel. Fuel line spills and leakage are dangerous. Fuel can Ignite and cause serious injuries or death and damage. Fuel can also irritate skin and eyes. To prevent this, always complete "BEFORE REPAIR PROCEDURE" and "AFTER REPAIR PROCEDURE" described in this manual. (See BEFORE REPAIR PROCEDURE [L3, AJ] ). (See AFTER REPAIR PROCEDURE [L3, AJ] ). CAUTION: Disconnecting/connecting quick release connector without cleaning it may possibly cause damage to fuel pipe and quick release connector. Always clean quick release connector joint area before disconnecting/connecting, and make sure that it is free of foreign material. |
| WARNING |
|---|
| The following troubleshooting flow chart contains the fuel system diagnosis and repair procedures. Read the following warnings before performing the fuel system services: Fuel vapor Is hazardous. It can easily ignite, causing serious injury and damage. Always keep sparks and flames away from fuel. Fuel line spills and leakage are dangerous. Fuel can Ignite and cause serious injuries or death and damage. Fuel can also irritate skin and eyes. To prevent this, always complete "BEFORE REPAIR PROCEDURE" and "AFTER REPAIR PROCEDURE" described in this manual. (See BEFORE REPAIR PROCEDURE [L3, AJ] ). (See AFTER REPAIR PROCEDURE [L3, AJ] ). |
| CAUTION |
|---|
| Disconnecting/connecting quick release connector without cleaning it may possibly cause damage to fuel pipe and quick release connector. Always clean quick release connector joint area before disconnecting/connecting, and make sure that it is free of foreign material. |
POSSIBLE CAUSES DESCRIPTIONS
NO. 20 FUEL ODOR (IN ENGINE COMPARTMENT) [AJ]
| 20 | Fuel odor (in engine compartment) |
|---|
| DESCRIPTION | Gasoline fuel smell or visible leakage |
| POSSIBLE CAUSE | Excessive fuel pressure Purge solenoid valve malfunction Fuel tank vent system blockage Charcoal canister malfunction Fuel leakage from fuel system WARNING: The following troubleshooting flow chart contains the fuel system diagnosis and repair procedures. Read the following warnings before performing the fuel system services: Fuel vapor is hazardous. It can easily ignite, causing serious injury and damage. Always keep sparks and flames away from fuel. Fuel line spills and leakage are dangerous. Fuel can ignite and cause serious injuries or death and damage. Fuel can also irritate skin and eyes. To prevent this, always complete "BEFORE REPAIR PROCEDURE" and "AFTER REPAIR PROCEDURE" described in this manual. (See BEFORE REPAIR PROCEDURE [L3, AJ] ). (See AFTER REPAIR PROCEDURE [L3, AJ] ). CAUTION: Disconnecting/connecting quick release connector without cleaning it may possibly cause damage to fuel pipe and quick release connector. Always clean quick release connector joint area before disconnecting/connecting, and make sure that It is free of foreign material. |
| WARNING |
|---|
| The following troubleshooting flow chart contains the fuel system diagnosis and repair procedures. Read the following warnings before performing the fuel system services: Fuel vapor is hazardous. It can easily ignite, causing serious injury and damage. Always keep sparks and flames away from fuel. Fuel line spills and leakage are dangerous. Fuel can ignite and cause serious injuries or death and damage. Fuel can also irritate skin and eyes. To prevent this, always complete "BEFORE REPAIR PROCEDURE" and "AFTER REPAIR PROCEDURE" described in this manual. (See BEFORE REPAIR PROCEDURE [L3, AJ] ). (See AFTER REPAIR PROCEDURE [L3, AJ] ). |
| CAUTION |
|---|
| Disconnecting/connecting quick release connector without cleaning it may possibly cause damage to fuel pipe and quick release connector. Always clean quick release connector joint area before disconnecting/connecting, and make sure that It is free of foreign material. |
POSSIBLE CAUSES DESCRIPTIONS
NO. 23 A/C DOES NOT WORK SUFFICIENTLY [AJ]
| 23 | A/C does not work sufficiently. |
|---|
| DESCRIPTION | A/C compressor magnetic clutch does not engage when A/C switch is turned on. |
| POSSIBLE CAUSE | Improper refrigerant charging amount Open A/C magnetic clutch Open circuit between A/C relay and A/C magnetic clutch Poor GND of A/C magnetic clutch Refrigerant pressure switch is stuck open. A/C relay is stuck open. Seized A/C compressor Open circuit between A/C switch and PCM through both refrigerant pressure switch and A/C amplifier |
POSSIBLE CAUSES DESCRIPTIONS
NO. 24 A/C ALWAYS ON/A/C COMPRESSOR RUNS CONTINUOUSLY [AJ]
| 24 | A/C always ON or A/C compressor runs continuously |
|---|
| DESCRIPTION | A/C compressor magnetic clutch does not disengage. |
| POSSIBLE CAUSE | Stuck engagement A/C compressor magnetic clutch A/C relay is stuck closed. Short to GND between A/C switch and PCM Short to GND circuit between A/C relay and PCM A/C relay to magnetic clutch circuit shorts to battery power. |
POSSIBLE CAUSES DESCRIPTIONS
NO. 25 A/C DOES NOT CUT OFF UNDER WIDE OPEN THROTTLE CONDITIONS [AJ]
| 25 | A/C does not cut off under wide open throttle conditions. |
|---|
| DESCRIPTION | A/C compressor magnetic clutch does not disengage under wide open throttle. |
| POSSIBLE CAUSE | Accelerator position sensor malfunction Accelerator position sensor misadjustment Loosely installed accelerator position sensor |
POSSIBLE CAUSES DESCRIPTIONS
NO. 26 EXHAUST SULPHUR SMELL [AJ]
| 26 | Exhaust sulphur smell |
|---|
| DESCRIPTION | Rotten egg smell (sulphur) from exhaust |
| POSSIBLE CAUSE | Electrical connectors are disconnected or connected poorly. Charcoal canister malfunction Vacuum lines are disconnected or connected improperly. Improper fuel pressure Poor fuel quality WARNING: The following troubleshooting flow chart contains the fuel system diagnosis and repair procedures. Read the following warnings before performing the fuel system services: Fuel vapor is hazardous. It can easily ignite, causing serious injury and damage. Always keep sparks and flames away from fuel. Fuel line spills and leakage are dangerous. Fuel can ignite and cause serious injuries or death and damage. Fuel can also irritate skin and eyes. To prevent this, always complete "BEFORE REPAIR PROCEDURE" and "AFTER REPAIR PROCEDURE" described in this manual. (See BEFORE REPAIR PROCEDURE [L3, AJ] ). (See AFTER REPAIR PROCEDURE [L3, AJ] ). CAUTION: Disconnecting/connecting quick release connector without cleaning it may possibly cause damage to fuel pipe and quick release connector. Always clean quick release connector joint area before disconnecting/connecting, and make sure that it is free of foreign material. |
| WARNING |
|---|
| The following troubleshooting flow chart contains the fuel system diagnosis and repair procedures. Read the following warnings before performing the fuel system services: Fuel vapor is hazardous. It can easily ignite, causing serious injury and damage. Always keep sparks and flames away from fuel. Fuel line spills and leakage are dangerous. Fuel can ignite and cause serious injuries or death and damage. Fuel can also irritate skin and eyes. To prevent this, always complete "BEFORE REPAIR PROCEDURE" and "AFTER REPAIR PROCEDURE" described in this manual. (See BEFORE REPAIR PROCEDURE [L3, AJ] ). (See AFTER REPAIR PROCEDURE [L3, AJ] ). |
| CAUTION |
|---|
| Disconnecting/connecting quick release connector without cleaning it may possibly cause damage to fuel pipe and quick release connector. Always clean quick release connector joint area before disconnecting/connecting, and make sure that it is free of foreign material. |
POSSIBLE CAUSES DESCRIPTIONS
NO. 28 FUEL FILLING SHUT OFF ISSUES [AJ]
| 28 | Fuel filling shut off issues |
|---|
| DESCRIPTION | Fuel does not shut off properly. |
| POSSIBLE CAUSE | Clogged EVAP pipes Non-return valve malfunction Fuel shut-off valve malfunction Fuel nozzle malfunction Fuel nozzle is not inserted correctly. WARNING: The following troubleshooting flow chart contains the fuel system diagnosis and repair procedures. Read the following warnings before performing the fuel system services: Fuel vapor is hazardous. It can easily ignite, causing serious injury and damage. Always keep sparks and flames away from fuel. Fuel line spills and leakage are dangerous. Fuel can ignite and cause serious injuries or death and damage. Fuel can also irritate skin and eyes. To prevent this, always complete "BEFORE REPAIR PROCEDURE" and "AFTER REPAIR PROCEDURE" described in this manual. (See BEFORE REPAIR PROCEDURE [L3, AJ] ). (See AFTER REPAIR PROCEDURE [L3, AJ] ). CAUTION: Disconnecting/connecting quick release connector without cleaning it may possibly cause damage to fuel pipe and quick release connector. Always clean quick release connector joint area before disconnecting/connecting, and make sure that It Is free of foreign material. |
| WARNING |
|---|
| The following troubleshooting flow chart contains the fuel system diagnosis and repair procedures. Read the following warnings before performing the fuel system services: Fuel vapor is hazardous. It can easily ignite, causing serious injury and damage. Always keep sparks and flames away from fuel. Fuel line spills and leakage are dangerous. Fuel can ignite and cause serious injuries or death and damage. Fuel can also irritate skin and eyes. To prevent this, always complete "BEFORE REPAIR PROCEDURE" and "AFTER REPAIR PROCEDURE" described in this manual. (See BEFORE REPAIR PROCEDURE [L3, AJ] ). (See AFTER REPAIR PROCEDURE [L3, AJ] ). |
| CAUTION |
|---|
| Disconnecting/connecting quick release connector without cleaning it may possibly cause damage to fuel pipe and quick release connector. Always clean quick release connector joint area before disconnecting/connecting, and make sure that It Is free of foreign material. |
POSSIBLE CAUSES DESCRIPTIONS
NO. 29 SPARK PLUG CONDITION [AJ]
| 29 | Spark plug condition |
|---|
| DESCRIPTION | Incorrect spark plug condition |
| POSSIBLE CAUSE | NOTE: Inspecting spark plugs condition can determine whether problem is related to a specific cylinder or to all cylinders. Wet/carbon is stuck on specific plug: Spark-Weak, not visible Air/fuel mixture-Excessive fuel injection volume Compression-No compression, low compression Faulty spark plug Grayish white with specific plug: Air/fuel mixture-Insufficient fuel injection volume Faulty spark plug Wet/carbon stuck on all plugs: Spark-Weak Air/fuel mixture-Too rich Compression-Low compression Clogging in intake/exhaust system Grayish white with all plugs: Air/fuel mixture-Too lean WARNING: The following troubleshooting flow chart contains the fuel system diagnosis and repair procedures. Read the following warnings before performing the fuel system services: Fuel vapor is hazardous. It can easily ignite, causing serious injury and damage. Always keep sparks and flames away from fuel. Fuel line spills and leakage are dangerous. Fuel can ignite and cause serious injuries or death and damage. Fuel can also irritate skin and eyes. To prevent this, always complete "BEFORE REPAIR PROCEDURE" and "AFTER REPAIR PROCEDURE" described in this manual. (See BEFORE REPAIR PROCEDURE [L3, AJ] ). (See AFTER REPAIR PROCEDURE [L3, AJ] ). CAUTION: Disconnecting/connecting quick release connector without cleaning it may possibly cause damage to fuel pipe and quick release connector. Always clean quick release connector joint area before disconnecting/connecting, and make sure that it is free of foreign material. |
| NOTE |
|---|
| Inspecting spark plugs condition can determine whether problem is related to a specific cylinder or to all cylinders. |
| WARNING |
|---|
| The following troubleshooting flow chart contains the fuel system diagnosis and repair procedures. Read the following warnings before performing the fuel system services: Fuel vapor is hazardous. It can easily ignite, causing serious injury and damage. Always keep sparks and flames away from fuel. Fuel line spills and leakage are dangerous. Fuel can ignite and cause serious injuries or death and damage. Fuel can also irritate skin and eyes. To prevent this, always complete "BEFORE REPAIR PROCEDURE" and "AFTER REPAIR PROCEDURE" described in this manual. (See BEFORE REPAIR PROCEDURE [L3, AJ] ). (See AFTER REPAIR PROCEDURE [L3, AJ] ). |
| CAUTION |
|---|
| Disconnecting/connecting quick release connector without cleaning it may possibly cause damage to fuel pipe and quick release connector. Always clean quick release connector joint area before disconnecting/connecting, and make sure that it is free of foreign material. |
POSSIBLE CAUSES DESCRIPTIONS
Input Signal System Investigation Procedure
- Find an unusual signal. (See «FINDING UNUSUAL SIGNALS»(ref-288778-S20346420332008062500000) ).
- Locate its source. (See «LOCATING THE SOURCE OF UNUSUAL SIGNALS»(ref-288778-S10540855602008062500000) ).
- Repair or replace the defective part.
- Confirm that the unusual signal has been erased.
Finding unusual signals
While referring to 01-02C-6 ON-BOARD DIAGNOSTIC TEST [AJ], use the PID/DATA monitor and record function to inspect the input signal system relating to the problem.
- Start the engine and idle the vehicle. You can assume that any signals that are out of specification by a wide margin are unusual.
- When recreating the problem, any sudden change in monitor input signals that is not consciously created by the driver can be judged as unusual.
Locating the source of unusual signals
| CAUTION | Compare the M-MDS monitor voltage with the measurement voltage using the digital measurement system function. If you use another tester, misreading may occur. When measuring voltage, attach the tester GND to the GND of the PCM that is being tested, or to the engine itself. If this is not done, the measured voltage and actual voltage may differ. After connecting the pin to a waterproof coupler, confirming continuity and measuring the voltage, inspect the waterproof connector for cracks. If there are any, use sealant to fix them. Failure to do this may result in deterioration of the harness or terminal from water damage, leading to problems with the vehicle. |
Scheme 153
Scheme 153: Variable resistance type 1 (APP sensor, TP sensor and EGR boost sensor)
Investigate the input signal system for variable resistance type 1
- When you get an unusual signal, measure the #1 PCM terminal voltage. If the #1 terminal voltage and the M-MDS monitor voltage are the same, proceed to the next step. If there is a difference of 0.5 V or more, inspect for the following points concerning the PCM connector. Female terminal opening is loose. Coupler (pin holder) damage Pin discoloration (blackness) Harness/pin crimp is loose or disconnected.
- Measure the #2 sensor terminal voltage. If there is a 0.5 V or more difference between the sensor and M-MDS voltages, inspect the harness for open or short circuits. If the sensor and M-MDS voltages are the same, inspect for the following points concerning the sensor connector. If there are no problems, proceed to next investigation below. Female terminal opening is loose. Coupler (pin holder) damage Pin discoloration (blackness)
Investigate the standard power supply system for variable resistance type 1
- Confirm that the #3 terminal is at 5 V. If the measured voltage on the #3 terminal is 5 V , inspect the following points on the sensor connector. If there is no problem, inspect for the following: Female terminal opening loose Coupler (pin holder) damage Pin discoloration (blackness) If the #3 terminal measures other than 5 V, inspect for the following: Open or short circuit in harness Harness/pin crimp is loose or disconnected.
Investigate the GND system for variable resistance type 1
- Confirm that terminal sensor #5 is at 0 V. If it is at 0 V, inspect the sensor. If necessary, replace the sensor. If not, inspect for the following: Open or short circuit in harness Female terminal opening is loose open or short circuit in harness Coupler (pin holder) damage Pin discoloration (blackness) Harness/pin crimp is loose or disconnected.
Scheme 154
Scheme 154: Variable resistance type 2 (MAF sensor)
Investigate the GND system for variable resistance type 2
- Confirm that terminal sensor #4 is at 0 V. If it is at 0 V, inspect the sensor. If necessary, replace the sensor. If not at 0 V, inspect for the following: Open circuit in harness Female terminal opening is loose. Coupler (pin holder) damage Pin discoloration (blackness) Harness/pin crimp is loose or disconnected.
Investigate the input signal system for variable resistance type 2
- When you get an unusual signal, measure the #1 PCM terminal voltage. If the #1 terminal voltage and the M-MDS monitor voltage are the same, proceed to the next step. If there is a difference of 0.5 V or more, inspect for the following points concerning the PCM connector. Female terminal opening is loose. Coupler (pin holder) damage Pin discoloration (blackness) Harness/pin crimp is loose or disconnected.
- Measure the #2 sensor terminal voltage. If there is a 0.5 V or more difference between the sensor and M-MDS voltages, inspect the harness for open or short circuits. If the sensor and M-MDS voltages are the same, inspect the following points concerning the sensor connector. Female terminal opening is loose. Coupler (pin holder) damage Pin discoloration (blackness) Harness/pin crimp is loose or disconnected. If there are no problems, proceed to next investigation below.
Investigate the electrical supply system for variable resistance type 2
- Confirm that the sensor #3 terminal is B+ . If the measured voltage on the #3 terminal is B+ , inspect the following points on the sensor connector. If there is no problem, inspect for the following: Female terminal opening is loose. Coupler (pin holder) damage Pin discoloration (blackness) If the #3 terminal measures other than B+ , inspect the following: Open or short circuit in harness Harness/pin crimp is loose or disconnected.
Scheme 155
Scheme 155: Thermistor type (IAT sensor and ECT sensor)
Investigate the input signal system for thermistor type
- When you get an unusual signal, measure the #1 PCM terminal voltage. If the #1 terminal voltage and the M-MDS monitor voltage are the same, proceed to the next step. If there is a difference of 0.5 V or more, inspect the following points concerning the PCM connector. Female terminal opening loose Coupler (pin holder) damage Pin discoloration (blackness) Harness/pin crimp is loose or disconnected.
- Measure the #2 sensor terminal voltage. If there is a 0.5 V or more difference between the sensor and M-MDS voltages, inspect the harness for open or short circuits. If the sensor and M-MDS voltages are the same, inspect the following points concerning the sensor connector. Female terminal opening is loose. Coupler (pin holder) damage Pin discoloration (blackness) Harness/pin crimp is loose or disconnected. If there are no problems, proceed to next investigation below.
Investigate the GND system for thermistor type
- Confirm that terminal sensor #3 is at 0 V. If it is at 0 V , inspect the sensor. If necessary, replace the sensor. If not, inspect for the following: Open circuit in harness Female terminal opening is loose. Coupler (pin holder) damage Pin discoloration (blackness) Harness/pin crimp is loose or disconnected.
Scheme 156
- Measure the #1 PCM terminal voltage and confirm that it is at 0 V or 5 V when the ignition switch at ON position and the engine at idle. If it is at 0 V or 5 V , intermittent concern exists. (See «INTERMITTENT CONCERN TROUBLESHOOTING [AJ]»(ref-288778-S42667331382008062500000) ). If not, inspect the following points concerning the PCM connector. If there is no problem, inspect for the following: Female terminal opening is loose. Coupler (pin holder) damage Pin discoloration (blackness) Harness/pin crimp is loose or disconnected.
- Measure the #2 sensor terminal voltage and confirm that it is at 0 V or 5 V when the ignition switch at ON and the engine at idle. If it is at 0 V or 5 V , intermittent concern exists. (See «INTERMITTENT CONCERN TROUBLESHOOTING [AJ]»(ref-288778-S42667331382008062500000) ). If not, inspect the following points concerning the sensor connector. If there is no problem, inspect for the following: Female terminal opening is loose. Coupler (pin holder) damage Pin discoloration (blackness) Harness/pin crimp is loose or disconnected.
- Confirm that the #3 terminal switch voltage is at 0 V. If it is at 0 V , inspect the sensor. If necessary, replace the sensor. If necessary, replace the sensor. If not, inspect for the following: Open circuit in harness Female terminal opening is loose. Coupler (pin holder) damage Pin discoloration (blackness) Harness/pin crimp is loose or disconnected.
When idling cannot be continued
Note. Inspect for each bank
- Remove the OCV and verify that the spool valve is at maximum retard position. If the spool valve is stuck in advance direction, replace the OCV. (See «OIL CONTROL VALVE (OCV) REMOVAL/INSTALLATION [AJ]»(ref-288768-S26584409182008062500000) ).
- Connect the OCV.
- Turn the ignition switch to ON position.
- Verify that the spool valve is at max. retard position. If the spool valve is stuck in advance direction, inspect the following: Short circuit in harnesses or connectors between the OCV and the PCM.
- Inspect the variable valve timing actuator.
For right bank
- Disconnect OCV (RH) connector.
- Warm up the engine and it at idle.
- Apply the battery voltage to the OCV and verify that the engine idles roughly or stalls. If the engine idles roughly or stalls, inspect the timing belt component (valve timing deviation). If the engine does not idle roughly or stall, go to the next step.
- Remove the OCV (RH) and perform spool valve operation inspection. (See «OIL CONTROL VALVE (OCV) INSPECTION [AJ]»(ref-288768-S33053001682008062500000) ). If not as specified, inspect the following: OCV(RH) Harnesses and connectors between OCV (RH) and PCM have an open or short circuit. If as specified, inspect the following right bank hydraulic passages for clogging or leakage, or both. Oil pressure switch - OCV OCV-camshaft Camshaft internal passage
- If they are normal, replace the right bank camshaft pulley (with built-in variable valve timing actuator).
For left bank
- Disconnect OCV (LH) connector.
- Warm up the engine to idle.
- Apply the battery voltage to the OCV and verify that the engine idles roughly or stalls. If the engine idles roughly or stalls, inspect the timing belt component (valve timing deviation). If the engine does not idle roughly or stall, go to the next step.
- Remove the OCV (LH) and perform spool valve operation inspection. (See «OIL CONTROL VALVE (OCV) INSPECTION [AJ]»(ref-288768-S33053001682008062500000) ). If not as specified, inspect the following: OCV(LH) Harnesses and connectors between OCV (LH) and PCM have an open or short circuit. If as specified, inspect the following left bank hydraulic passages for clogging or leakage or both. Oil pressure switch - OCV OCV-camshaft Camshaft internal passage
- If they are normal, replace the left bank camshaft pulley (with built-in variable valve timing actuator).
![Scheme 152: NO. 1 MELTING OF MAIN OR OTHER FUSES [AJ]](https://i.diagnostdata.com/repair/ab/ab33ddb1c3d8c87b87dbee75cc24c267386295f020a2abe969d149c0fa167f80.webp)
