SAAB WIS ONLINE

DTC P0107 or P0108

DTC P0107 or P0108

Diagnostic Instructions


• Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure.

• Review Strategy Based Diagnosis for an overview of the diagnostic approach.

• Diagnostic Procedure Instructions provides an overview of each diagnostic category.


DTC Descriptors

DTC P0107

Manifold Absolute Pressure (MAP) Sensor Circuit Low Voltage

DTC P0108

Manifold Absolute Pressure (MAP) Sensor Circuit High Voltage

Diagnostic Fault Information

Circuit Short to Ground High Resistance Open Short to Voltage Signal Performance
5 V Reference

P0107, P0193, P0236, P0335, P0642

P0106, P0107

P0107

P0193, P0236, P0606, P0643, P0690, P2227

P0641, P0642, P0643

MAP Sensor Signal

P0107

P0106, P0107

P0107

P0106, P0108

P0106

Low Reference

-

P0106

P0106

-

-



Typical Scan Tool Data

MAP Sensor

Circuit Short to Ground Open Short to Voltage
Operating Conditions: Engine running, transmission in Park or Neutral.

Parameter Normal Range: 20-48 kPa, varies with altitude.

5 V Reference

0 kPa

0 kPa

0-30 kPa

MAP Sensor Signal

0 kPa

0 kPa

255 kPa

Low Reference

-

80-250 kPa

-



Circuit/System Description

The manifold absolute pressure (MAP) sensor has a 5 V reference circuit, a low reference circuit, and a signal circuit. The engine control module (ECM) supplies 5 V to the MAP sensor on the 5 V reference circuit, and provides a ground on the low reference circuit. The MAP sensor provides a voltage signal to the ECM on the signal circuit relative to the intake manifold pressure changes.

The sensor used on this engine is a three atmosphere sensor. Pressure in the intake manifold is affected by engine speed, throttle opening, turbocharger boost pressure, intake air temperature (IAT), and barometric pressure (BARO). During normal operation, the highest pressure that can occur in the intake manifold with the ignition ON and the engine OFF is equal to the barometric pressure (BARO). When the vehicle is run with wide open throttle (WOT) , the turbocharger can increase the pressure to nearly 240 kPa (2.4 bar). The least manifold pressure occurs when the vehicle is decelerating and can range from 13-48 kPa (0.13-0.48 bar).

Conditions for Running the DTC


• The ignition is ON or the engine is running.

• The DTCs run continuously within the enabling conditions.


Conditions for Setting the DTC

P0107

The ECM detects that the MAP sensor voltage is less than 0.19 V for more than 4 s continuously, or 50 s cumulative.

P0108

The ECM detects that the MAP sensor voltage is more than 4.80 V for more than 4 s continuously, or 50 s cumulative.

Action Taken When the DTC Sets

DTCs P0107 and P0108 are Type B DTCs.

Conditions for Clearing the MIL/DTC

DTCs P0107 and P0108 are Type B DTCs.

Reference Information

Schematic Reference

Engine Controls Schematics

Connector End View Reference

Component Connector End Views

Electrical Information Reference


• Circuit Testing

• Connector Repairs

• Testing for Intermittent Conditions and Poor Connections

• Wiring Repairs


DTC Type Reference

Powertrain Diagnostic Trouble Code (DTC) Type Definitions

Scan Tool Reference

Control Module References for scan tool information

Special Tools

EN 35555 Metal Mityvac

For equivalent regional tools, refer to Special Tools .

Circuit/System Verification


1. Verify that DTCs P0641, P0642, or P0643 are not set.

2. If any of the DTCs are set, refer to DTC P0641-P0643, P0651-P0653, or P0697-P0699 .

3. Ignition ON, observe the scan tool MAP sensor parameter. The reading should be between 0.20-4.80 V.

4. Operate the vehicle within the Conditions for Running the DTC to verify the DTC does not reset. You may also operate the vehicle within the conditions that you observed from the Freeze Frame/Failure Records data.


Circuit/System Testing


1. Ignition OFF, disconnect the harness connector at the B74 MAP sensor.

2. Ignition OFF for 90 s, test for less than 5 Ω between the low reference circuit terminal 2 and ground.

3. If greater than the specified range, test the low reference circuit for an open/high resistance. If the circuit tests normal, replace the K20 ECM.

4. Ignition ON, test for 4.8-5.2 V between the 5 V reference circuit terminal 1 and ground.

5. If less than the specified range, test the 5 V reference circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the K20 ECM.

6. If more than the specified range, test the 5 V reference circuit for a short to voltage. If the circuit tests normal, replace the K20 ECM.

7. Verify the scan tool MAP Sensor parameter is less than 1 kPa.

8. If more than the specified range, test the signal circuit terminal 3 for a short to voltage. If the circuit tests normal, replace the K20 ECM.

9. Install a 3A fused jumper wire between the signal circuit terminal 3 and the 5 V reference circuit terminal 1. Verify the scan tool MAP Sensor parameter is greater than 254 kPa.

10. If less than the specified range, test the signal circuit terminal 3 for a short to ground or an open/high resistance. If the circuit tests normal, replace the K20 ECM.

11. If the circuits test normal, test or replace the B74 MAP sensor.


Component Testing

Note

You must perform the Circuit/System Testing in order to verify the integrity of the MAP sensor circuits before proceeding with the Component Testing.



Erratic Signal Test

1. Ignition OFF, remove the B74 MAP sensor.

2. Install a 3 A fused jumper wire between the 5 V reference circuit terminal 1 and the corresponding terminal of the B74 MAP sensor.

3. Install a jumper wire between the low reference circuit terminal 2 of the B74 MAP sensor and ground.

4. Ignition ON, with the EN 35555 Mityvac , slowly apply vacuum to the sensor while measuring the voltage at terminal 3 of the MAP sensor. The voltage should vary between 0-5 V, without any spikes or dropouts.

5. If the voltage reading is erratic, replace the B74 MAP sensor.


Repair Instructions

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.


• Manifold Absolute Pressure Sensor Replacement

• Control Module References for ECM replacement, setup, and programming