STEP 1. Using scan tool (M.U.T.-III), check data list item 10: Mass Airflow Sensor.
caution | To prevent damage to scan tool (M.U.T.-III), always turn the ignition switch to the "LOCK" (OFF) position before connecting or disconnecting scan tool (M.U.T.-III). |
(1) Connect scan tool (M.U.T.-III). Refer to HOW TO CONNECT THE SCAN TOOL (M.U.T.-III)
. (2) Start the engine and run at idle.
(3) Set scan tool (M.U.T.-III) to the data reading mode for item 10, Mass Airflow Sensor.
(4) Warm up the engine to normal operating temperature: 80°C to 95°C (176°F to 203°F).- When idling, between 700 and 1,100 millivolts.
- When 2,500 r/min, between 1,620 and 2,020 millivolts.
(5) Turn the ignition switch to the "LOCK" (OFF) position.
Is the sensor operating properly?
YES: Go to Step 2.
Refer to DTC P0102 - Mass Airflow Circuit Low Input
, DTC P0103 - Mass Airflow Circuit High Input
.
STEP 2. Using scan tool (M.U.T.-III), check data list item 5: Intake Air Temperature Sensor.
STEP 3. Using scan tool (M.U.T.-III), check data list item 6: Engine Coolant Temperature Sensor.
STEP 4. Using scan tool (M.U.T.-III), check data list item 8: Manifold Absolute Pressure Sensor.
(1) Turn the ignition switch to the "ON" position.
(2) Set scan tool (M.U.T.-III) to the data reading mode for item 8, Manifold Absolute Pressure Sensor.- When altitude is 0 m (0 foot), 101 kPa (29.8 in.Hg).
- When altitude is 600 m (1,969 feet), 95 kPa (28.1 in.Hg).
- When altitude is 1,200 m (3,937 feet), 88 kPa (26.0 in.Hg).
- When altitude is 1,800 m (5,906 feet), 81 kPa (23.9 in.Hg).
(3) Start the engine.- When the engine is idling, 28.0 - 41.4 kPa (8.3 - 12.2 in.Hg).
- When the engine is suddenly revved, manifold absolute pressure varies.
(4) Turn the ignition switch to the "LOCK" (OFF) position.
Is the sensor operating properly?
Go to Step 5.
Refer to DTC P0106 - Manifold Absolute Pressure Circuit Range/Performance Problem
, DTC P0107 - Manifold Absolute Pressure Circuit Low Input
, DTC P0108 - Manifold Absolute Pressure Circuit High Input
.
STEP 5. Check the injector.
STEP 6. Check the fuel pressure.
STEP 7. Replace the injector.
STEP 8. Test the OBD-II drive cycle.
(1) Carry out a test drive with the drive cycle pattern. Refer to Diagnostic Function - OBD-II Drive Cycle - Pattern 21
. (2) Check the diagnostic trouble code (DTC).
Is DTC P0172 stored?
Retry the troubleshooting.
The inspection is complete.