13A-DTC P0106: Manifold Absolute Pressure Circuit Range/Performance Problem

DTC P0106: Manifold Absolute Pressure Circuit Range/Performance Problem

CIRCUIT OPERATION

A 5-volt voltage is supplied to the manifold absolute pressure sensor power terminal from the ECM terminal MAP5. The ground terminal is grounded with ECM terminal MAPE.
A voltage that is proportional to the intake manifold pressure is sent to the ECM terminal MAP from the manifold absolute pressure sensor output terminal.

TECHNICAL DESCRIPTION

The manifold absolute pressure sensor outputs a voltage which corresponds to the intake manifold pressure.
The ECM checks whether this voltage is within a specified range.

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 stored 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
Barometric pressure sensor

DTC SET CONDITIONS

Logic Flow Chart

Check Conditions

The difference between the actual manifold pressure and the manifold pressure estimated by the throttle position sensor (main) is 0 kPa (0 in.Hg) or more.
The difference between the actual manifold pressure and the manifold pressure estimated by the throttle position sensor (sub) is 0 kPa (0 in.Hg) or more. 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

Control as if the inlet manifold vacuum pressure is 101 kPa.

OBD-II DRIVE CYCLE PATTERN

Refer to Diagnostic Function - OBD-II Drive Cycle - Pattern 17 .

TROUBLESHOOTING HINTS (The most likely causes for this code to be stored are: )

Manifold absolute pressure sensor failed.
Mass airflow sensor circuit harness damage, or connector damage.
ECM failed.

DIAGNOSIS

Required Special Tools:

MB992744: Vehicle Communication Interface-Lite (V.C.I.-Lite)
MB992745: V.C.I.-Lite Main Harness A
MB992747: V.C.I.-Lite USB Cable Short
MB992748: V.C.I.-Lite USB Cable Long
MB991958: Scan Tool (M.U.T.-III Sub Assembly)

MB991824: Vehicles Communication Interface (V.C.I.)
MB991827: M.U.T.-III USB Cable
MB991910: M.U.T.-III Main Harness A (Vehicles with CAN communication system)

MB992110: Power Plant ECU Check Harness

STEP 1. Using scan tool (M.U.T.-III), check data list item 8: Manifold Absolute Pressure 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) Turn the ignition switch to the "ON" position.

(3) 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).

(4) 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.

(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 by backprobing.

(1) Do not disconnect the connector.

(2) Turn the ignition switch to the "ON" position.

(3) Measure the voltage between terminal MAP line and ground by backprobing.

When altitude is 0 m (0 foot), voltage should be between 3.8 and 4.2 volts.
When altitude is 600 m (1,969 feet), voltage should be between 3.5 and 3.9 volts.
When altitude is 1,200 m (3,937 feet), voltage should be between 3.3 and 3.7 volts.
When altitude is 1,800 m (5,906 feet), voltage should be between 3.0 and 3.4 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 by backprobing.

(1) Do not disconnect the connector.

(2) Turn the ignition switch to the "ON" position.

(3) Measure the voltage between terminal MAP5 line and ground by backprobing.

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 ground voltage at manifold absolute pressure sensor connector by backprobing.

(1) Do not disconnect the connector.

(2) Turn the ignition switch to the "ON" position.

(3) Measure the voltage between terminal MAPE line and ground by backprobing.

Voltage should be 0.5 volt or less.

(4) Turn the ignition switch to the "LOCK" (OFF) position.

Is the measured voltage 0.5 volt or less?

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. Measure the sensor output voltage at ECM connector by using power plant ECU check harness special tool MB992110.

(1) Disconnect all ECM connectors. Connect the power plant ECU check harness special tool MB992110 between the separated connectors.

(2) Turn the ignition switch to the "ON" position.

(3) Measure the voltage between terminal MAP and ground.

When altitude is 0 m (0 foot), voltage should be between 3.8 and 4.2 volts.
When altitude is 600 m (1,969 feet), voltage should be between 3.5 and 3.9 volts.
When altitude is 1,200 m (3,937 feet), voltage should be between 3.3 and 3.7 volts.
When altitude is 1,800 m (5,906 feet), voltage should be between 3.0 and 3.4 volts.

(4) Turn the ignition switch to the "LOCK" (OFF) position.

Is the measured voltage normal?

Go to Step 8.

Repair or replace the connector(s), or check and repair the harness of damage in MAP line between manifold absolute pressure sensor connector and ECM connector. Then go to Step 9.

STEP 8. 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?

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 17

(2) Check the diagnostic trouble code (DTC).

Is DTC P0106 stored?

Retry the troubleshooting.

The inspection is complete.