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 5V. The manifold absolute pressure sensor ground terminal is grounded with ECM terminal SENG.
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)

Mass airflow sensor
Engine coolant temperature sensor
Intake air temperature sensor
Barometric pressure sensor
Throttle position sensor

DTC SET CONDITIONS <Range/Performance problem - high input>

Logic Flow Chart

Check Conditions

More than 8 minutes have passed since the engine starting sequence was completed, when the engine coolant temperature at engine start is less than 0°C (32°F).
Engine speed is between 500 r/min and 1,500 r/min.
Throttle position sensor output voltage is less than 0.8 volt.

Judgment Criterion

Manifold absolute pressure sensor output voltage is more than 3.5 volts [corresponding to a manifold absolute pressure of 89 kPa (26.3 in.Hg)] for 2 seconds.

DTC SET CONDITIONS <Range/Performance problem - low input>

Logic Flow Chart

Check Conditions

More than 8 minutes have passed since the engine starting sequence was completed, when the engine coolant temperature at engine start is less than 0°C (32°F).
Engine speed is more than 1,500 r/min.
Throttle position sensor output voltage is more than 3.5 volts.

Judgment Criterion

Manifold absolute pressure sensor output voltage is less than 1.8 volts [corresponding to a manifold absolute pressure of 45 kPa (13.3 in.Hg)] for 2 seconds.

FAIL-SAFE AND BACKUP FUNCTION

Control as if the intake manifold vacuum pressure is 101 kPa (29.8 in.Hg)

OBD-II DRIVE CYCLE PATTERN

Refer to Diagnostic Function - OBD-II Drive Cycle - Pattern 6 .

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

Manifold absolute pressure sensor failed.
Harness damage.
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)

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.

Warm up the engine. When the engine is idling, 22 - 42 kPa (6.5 - 12.4 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 manifold absolute pressure sensor 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 manifold absolute pressure sensor connector.

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

(3) Measure the voltage between terminal 5V 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 5V line between manifold absolute pressure sensor connector and ECM connector.

Is the harness wire in good condition?

Go to Step 8

Repair it. Then go to Step 9

STEP 5. Measure the ground voltage at manifold absolute pressure sensor connector by backprobing.

(1) Do not disconnect the manifold absolute pressure sensor connector.

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

(3) Measure the voltage between terminal SENG 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 SENG line between manifold absolute pressure sensor connector and ECM connector.

Is the harness wire in good condition?

Go to Step 8

Repair it. Then go to Step 9

STEP 7. Measure the sensor output voltage at ECM 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 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.

Warm up the engine. When the engine is idling, 22 - 42 kPa (6.5 - 12.4 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 6

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

Is DTC P0106 set?

Retry the troubleshooting.

The inspection is complete.