P0107

1UR-FE ENGINE CONTROL: SFI SYSTEM: P0107,P0108: Manifold Absolute Pressure / Barometric Pressure Circuit Low Input
P0108 - Manifold Absolute Pressure / Barometric Pressure Circuit High Input

DESCRIPTION

The manifold absolute pressure sensor detects the intake manifold pressure as a voltage using a built-in sensor unit.









HINT
When either of these DTCs is output, check the manifold absolute pressure using the Techstream. Enter the following menus: Powertrain / Engine and ECT / Data List / All Data / MAP.





MONITOR DESCRIPTION

The ECM monitors the sensor voltage and uses this value to calculate the manifold absolute pressure. When the sensor output voltage deviates from the normal operating range, the ECM interprets this as a malfunction in the manifold pressure sensor and stores a DTC.

Example:

When the sensor output voltage remains below 0.5 V, or higher than 4.5 V for more than 0.5 seconds, the ECM stores a DTC.

If the malfunction is not repaired successfully, a DTC is stored 0.5 seconds after the engine is next started.

MONITOR STRATEGY





TYPICAL ENABLING CONDITIONS





TYPICAL MALFUNCTION THRESHOLDS

P0107





P0108





CONFIRMATION DRIVING PATTERN

- Connect the Techstream to the DLC3.

- Turn the engine switch on (IG) and turn the Techstream on.

- Clear DTCs (even if no DTCs are stored, perform the clear DTC operation).

- Turn the engine switch off and wait for at least 30 seconds.

- Turn the engine switch on (IG) and turn the Techstream on.

- Start the engine.

- Idle the engine for 5 seconds [A].

- Enter the following menus: Powertrain / Engine and ECT / Trouble Codes [B].

- Read the pending DTCs.

HINT
- If a pending DTC is output, the system is malfunctioning.
- If a pending DTC is not output, perform the following procedure.
- Enter the following menus: Powertrain / Engine and ECT / Utility / All Readiness.

- Input the DTC: P0107 or P0108.

- Check the DTC judgment result.





HINT
- If the judgment result shows NORMAL, the system is normal.
- If the judgment result shows ABNORMAL, the system has a malfunction.
- If the judgment result shows INCOMPLETE or UNKNOWN, perform steps [A] through [B] again.
- If no pending DTC is output, perform a universal trip and check for permanent DTCs DTC Check / Clear.

HINT
- If a permanent DTC is output, the system is malfunctioning.
- If no permanent DTC is output, the system is normal.

WIRING DIAGRAM





INSPECTION PROCEDURE

HINT
- If other DTCs related to different systems that have terminal E2 as the ground terminal are stored simultaneously, there may be an open circuit between terminal E2 and body ground.
- Read freeze frame data using the Techstream. The ECM records vehicle and driving condition information as freeze frame data the moment a DTC is stored. When troubleshooting, freeze frame data can help determine if the vehicle was moving or stationary, if the engine was warmed up or not, if the air fuel ratio was lean or rich, and other data from the time the malfunction occurred.
PROCEDURE

1. READ VALUE USING TECHSTREAM (MAP)

(a) Connect the Techstream to the DLC3.

(b) Turn the engine switch on (IG).

(c) Turn the Techstream on.

(d) Enter the following menus: Powertrain / Engine and ECT / Data List / MAP.

(e) Read the MAP value.

OK:

Same value as the actual atmospheric pressure.

HINT
- Standard atmospheric pressure is 101 kPa. For every 100 m increase in elevation, pressure drops by 1 kPa. This varies by weather (high atmospheric pressure, low atmospheric pressure).
- Also, check "Atmosphere Pressure" in the Data List.
NG -- CHECK MANIFOLD ABSOLUTE PRESSURE SENSOR (TERMINAL VOLTAGE)

OK -- CHECK FOR INTERMITTENT PROBLEMS

2. CHECK MANIFOLD ABSOLUTE PRESSURE SENSOR (TERMINAL VOLTAGE)

(a) Disconnect the manifold absolute pressure sensor connector.





(b) Turn the engine switch on (IG).

(c) Measure the voltage according to the value(s) in the table below.

Standard Voltage:





Text in Illustration





NG -- CHECK HARNESS AND CONNECTOR (MANIFOLD ABSOLUTE PRESSURE SENSOR - ECM)
OK -- Continue to next step.

3. REPLACE MANIFOLD ABSOLUTE PRESSURE SENSOR

(a) Replace the manifold absolute pressure sensor Removal.

NEXT -- Continue to next step.

4. CHECK WHETHER DTC OUTPUT RECURS

(a) Connect the Techstream to the DLC3.

(b) Turn the engine switch on (IG) and turn the Techstream on.

(c) Clear the DTCs DTC Check / Clear.

(d) Turn the engine switch off and wait for at least 30 seconds.

(e) Turn the engine switch on (IG) and wait for 5 seconds.

(f) Turn the Techstream on.

(g) Enter the following menus: Powertrain / Engine and ECT / Trouble Codes.

(h) Read the DTCs.

Result





B -- REPLACE ECM Removal

A -- END

5. CHECK HARNESS AND CONNECTOR (MANIFOLD ABSOLUTE PRESSURE SENSOR - ECM)

(a) Disconnect the manifold absolute pressure sensor connector.

(b) Disconnect the ECM connector.

(c) Measure the resistance according to the value(s) in the table below.

Standard Resistance (Check for Open):





Standard Resistance (Check for Short):





NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR

OK -- REPLACE ECM Removal