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DTC P0106: Manifold Absolute Pressure Circuit Range/Performance Problem
 
 
 
 
CIRCUIT OPERATION
Refer to DTC P0107 - Manifold absolute pressure sensor circuit low input , DTC P0108 - Manifold absolute pressure sensor circuit high input .
 
 
TECHNICAL DESCRIPTION
ECM checks the manifold absolute pressure sensor for abnormal conditions.
 
 
DESCRIPTIONS OF MONITOR METHODS
  • Compare load value with manifold absolute pressure sensor output voltage.
 
 
MONITOR EXECUTION
  • Continuous
 
 
MONITOR EXECUTION CONDITIONS (Other monitor and Sensor)
Other Monitor (There is no temporary DTC set in memory for the item monitored below)
  • Not applicable
Sensor (The sensor below is determined to be normal)
  • Engine coolant temperature sensor
  • Throttle position sensor
  • Mass airflow sensor
  • Intake air temperature sensor 1
  • Barometric pressure sensor
  • Boost pressure sensor
 
 
DTC SET CONDITIONS
Logic Flow Chart
Check Conditions
  • The manifold pressure estimated by the throttle position sensor (main) subtracted from the actual manifold pressure is more than 0 kPa (0 in.Hg).
  • The manifold pressure estimated by the throttle position sensor (sub) subtracted from the actual manifold pressure is more than 0 kPa (0 in.Hg). Or, the manifold pressure is 73 kPa (21.6 in.Hg) or less.
  • Engine speed is 750 r/min or higher.
Judgment Criterion
  • For 0.36 second, the difference between the actual manifold pressure and the manifold pressure estimated by the throttle position sensor (main) is 40 kPa (11.8 in.Hg) or more.
  • For 0.36 second, the difference between the actual manifold pressure and the manifold pressure estimated by the throttle position sensor (sub) is 40 kPa (11.8 in.Hg) or more.
  • For 0.36 second, the difference between the manifold pressure estimated by the throttle position sensor (main) and the manifold pressure estimated by the throttle position sensor (sub) is 7 kPa (2.1 in.Hg) or less.
 
 
FAIL-SAFE AND BACKUP FUNCTION
  • Estimate the throttle opening degree and the intake manifold pressure given by a normal sensor, and then carry out the fuel control.
  • Intake charge pressure is restricted.
 
 
OBD-II DRIVE CYCLE PATTERN
  • Refer to Diagnostic Function - OBD-II Drive Cycle - Pattern 1 .
 
 
TROUBLESHOOTING HINTS (The most likely causes for this code to be set are: )
  • Manifold absolute pressure sensor failed.
  • Manifold absolute pressure sensor circuit harness damage, or connector damage.
  • ECM failed.

 
 
DIAGNOSIS
Required Special Tool:
  • MB991709: Test Harness
STEP 1. Using scan tool (M.U.T.-IIISE), check data list item 8: Manifold Absolute Pressure Sensor.
cautionTo prevent damage to scan tool (M.U.T.-IIISE), always turn the ignition switch to the "LOCK" (OFF) position before connecting or disconnecting scan tool (M.U.T.-IIISE).
(1) Connect scan tool (M.U.T.-IIISE). Refer to HOW TO CONNECT THE SCAN TOOL (M.U.T.-IIISE) .
(2) Turn the ignition switch to the "ON" position.
(3) Set scan tool (M.U.T.-IIISE) 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).
(4) Start the engine.
  • When the engine is idling, 27 - 47 kPa (8.0 - 13.9 in.Hg).
  • When the engine is suddenly revved, manifold absolute pressure varies.
(5) Turn the ignition switch to the "LOCK" (OFF) position.
Is the sensor operating properly?
It can be assumed that this malfunction is intermittent. Refer to GROUP 00, How to Use Troubleshooting/Inspection Service Points - How to Cope with Intermittent Malfunctions .
Go to Step 2.
 
STEP 2. Measure the sensor output voltage at manifold absolute pressure sensor connector.
(1) Using test harness special tool MB991709 to connect connector, and measure at pick-up harness.
(2) Turn the ignition switch to the "ON" position.
(3) Measure the voltage between terminal MAP line and ground.
  • When altitude is 0 m (0 foot), voltage should be between 1.4 and 1.6 volts.
  • When altitude is 600 m (1,969 feet), voltage should be between 1.3 and 1.5 volts.
  • When altitude is 1,200 m (3,937 feet), voltage should be between 1.2 and 1.4 volts.
  • When altitude is 1,800 m (5,906 feet), voltage should be between 1.1 and 1.3 volts.
(4) Turn the ignition switch to the "LOCK" (OFF) position.
Is the measured voltage normal?
Go to Step 7.
Go to Step 3.
 
STEP 3. Measure the sensor supply voltage at manifold absolute pressure sensor connector.
(1) Disconnect the connector and measure at the harness side.
(2) Turn the ignition switch to the "ON" position.
(3) Measure the voltage between terminal MAP5 line and ground.
  • Voltage should be between 4.9 and 5.1 volts.
(4) Turn the ignition switch to the "LOCK" (OFF) position.
Is the measured voltage between 4.9 and 5.1 volts?
Go to Step 5.
Go to Step 4.
 
STEP 4. Check of harness damage in MAP5 line between manifold absolute pressure sensor connector and ECM connector.
Is the harness wire in good condition?
Go to Step 8.
Repair the connector(s) or wiring harness. Then go to Step 9.
 
STEP 5. Measure the resistance at manifold absolute pressure sensor connector.
(1) Disconnect the connector and measure at the harness side.
(2) Measure the resistance between terminal MAPE line and ground.
  • Continuity (2 ohms or less)
Does continuity exist?
Replace the manifold absolute pressure sensor. Then go to Step 9.
Go to Step 6.
 
STEP 6. Check of harness damage in MAPE line between manifold absolute pressure sensor connector and ECM connector.
Is the harness wire in good condition?
Go to Step 8.
Repair the connector(s) or wiring harness. Then go to Step 9.
 
STEP 7. Check of harness damage in MAP line between manifold absolute pressure sensor connector and ECM connector.
Is the harness wire in good condition?
Go to Step 8.
Repair the connector(s) or wiring harness. Then go to Step 9.
 
STEP 8. Using scan tool (M.U.T.-IIISE), 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.-IIISE) 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, 27 - 47 kPa (8.0 - 13.9 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?
It can be assumed that this malfunction is intermittent. Refer to GROUP 00, How to Use Troubleshooting/Inspection Service Points - How to Cope with Intermittent Malfunctions .
Replace the ECM (Refer to Removal and Installation ). Then go to Step 9.
 
STEP 9. 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 1 .
(2) Check the diagnostic trouble code (DTC).
Is DTC P0106 set?
Retry the troubleshooting.
The inspection is complete.