DTC P0107 or P0108
Diagnostic Instructions
DTC Descriptor
DTC P0107 00: Manifold Absolute Pressure (MAP)
Sensor Circuit Low Voltage |
DTC P0108 00: Manifold Absolute Pressure (MAP)
Sensor Circuit High Voltage |
Diagnostic Fault Information
Circuit
|
Short to Ground
|
Open/High Resistance
|
Short to Voltage
|
Signal Performance
|
5V Reference
|
P0651
|
P0107
|
P0651
|
-
|
Signal
|
P0107
|
P0108
|
P0108
|
-
|
Low Reference
|
P0108
|
P0108
|
-
|
-
|
|
|
Circuit/System Description
The turbocharger pressure sensor measures the pressure inside
the intake manifold. Pressure in the intake manifold is affected by
turbocharger output, engine speed, accelerator pedal input, air
temperature, and barometric pressure (BARO). A diaphragm within the
turbocharger pressure sensor is displaced by the pressure changes
that occur from the varying load and operating conditions of the
engine. The engine control module (ECM) supplies a regulated 5 V to
the sensor on the 5 V reference circuit. The ECM supplies a ground
on the low reference circuit. The turbocharger pressure sensor
provides a signal voltage to the ECM, relative to the pressure
changes, on signal circuit. The ECM converts the signal voltage
input to a pressure value. Under normal operation, the lowest
pressure that can exist in the intake manifold is equal to the
BARO. This occurs when the engine is operating at idle or when the
ignition is ON and the engine is OFF. The ECM uses the turbocharger
pressure sensor to aid in diagnosis of the turbocharger
performance.
Conditions for Running the DTC
• |
DTCs P0069, P0651, P2227 and
P2228 are not set. |
Conditions for Setting the DTC
The ECM detects the manifold absolute pressure (MAP) sensor
signal circuit is open, shorted to ground, or shorted to a voltage
for greater than 1 s.
Action Taken When the DTC Sets
DTCs P0107, and P0108 are Type B DTCs.
Conditions for Clearing the DTC
DTCs P0107, and P0108 are Type B DTCs.
Diagnostic Aids
If a shared 5 V reference circuit is shorted to ground or
shorted to a voltage, other 5 V reference circuits may be
affected.
Reference Information
Schematic Reference
Engine Controls Schematics
Connector End View Reference
Component Connector End Views
Electrical Information Reference
DTC Type Reference
Powertrain Diagnostic Trouble Code (DTC) Type Definitions
Scan Tool Reference
Control Module References for scan tool information
Special Tools
EN 23738-A Mityvac
For equivalent regional tools, refer to
Special Tools .
Circuit/System Verification
1. |
Ignition On, observe the DTC
information with a scan tool. Verify that DTCs P0651 is not
set. |
2. |
Determine the current vehicle
testing altitude. Ignition ON, observe the scan tool BARO Sensor
parameter. |
3. |
Ignition ON, observe the scan
tool Boost Pressure Sensor parameter. The Boost Pressure Sensor
parameter should match the BARO Sensor parameter. |
⇒ |
If the BARO Sensor parameter not matches the Boost
Pressure Sensor parameter, refer to Circuit/System Testing. |
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. |
Verify the integrity of the
entire air induction system by inspecting for the following
conditions: |
|
• |
Loose or improper
installation |
|
• |
Verify there are no
restrictions in the turbocharger pressure sensor port or vacuum
source. |
⇒ |
If a condition is found, repair as necessary. |
2. |
Ignition OFF, disconnect the
harness connector at the B111 Turbocharger Boost Sensor.
|
3. |
Test for less than 5 Ω
between the low reference circuit terminal 1 and ground.
|
⇒ |
If greater than the specified range, test the low
reference circuit for an open/high resistance. If the circuit tests
normal, replace the K20 Engine Control Module. |
4. |
Ignition ON, test for 4.8-5.2
V between the 5 V reference circuit terminal 3 and ground.
|
⇒ |
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 Engine Control
Module. |
⇒ |
If greater than the specified range, test the 5 V
reference circuit for a short to voltage. If the circuit tests
normal, replace the K20 Engine Control Module. |
5. |
Verify the scan tool Boost
Pressure Sensor parameter is greater than 4.8 V. |
⇒ |
If less than the specified range, test the signal
circuit for a short to ground. If the circuit tests normal, replace
the K20 Engine Control Module. |
6. |
Install a 3 A fused jumper
wire between the signal circuit terminal 4 and the low reference
circuit terminal 1. Verify the Boost Pressure Sensor parameter is
less than 0.3 V. |
⇒ |
If greater than the specified range, test the
signal circuit for an open circuit or a short to voltage. If the
circuit tests normal, replace the K20 Engine Control Module. |
7. |
If all circuits test normal,
test or replace the B111 Turbocharger Boost Sensor. |
Component Testing
Static Test
1. |
Ignition OFF, remove the
turbocharger boost pressure sensor from the intake manifold.
|
2. |
Ignition ON, observe and
record the scan tool Boost Pressure Sensor parameter. This is the
first Boost Pressure Sensor parameter reading. |
3. |
With the EN 23738-A
Mityvac apply 30 kPa (4.35 PSI) of pressure to the B111
Turbocharger Boost Sensor. Observe and record the scan tool Boost
Pressure Sensor parameter. This is the second Boost Pressure Sensor
parameter reading. |
4. |
Subtract the second Boost
Pressure Sensor parameter reading from the first Boost Pressure
Sensor parameter reading. Verify that the pressure difference is
within 4 kPa (0.58 PSI) of the applied pressure. |
⇒ |
If not within the specified range, replace the
B111 Turbocharger Boost Sensor. |
5. |
With the EN 23738-A
Mityvac apply 100 kPa (14.5 PSI) of pressure to the B111
Turbocharger Boost Sensor. Observe and record the scan tool Boost
Pressure Sensor parameter. This is the third Boost Pressure Sensor
parameter reading. |
6. |
Subtract the third Boost
Pressure Sensor parameter reading from the first Boost Pressure
Sensor parameter reading. Verify that the pressure difference is
within 4 kPa (0.58 PSI) of the applied pressure. |
⇒ |
If not within the specified range, replace the
B111 Turbocharger Boost Sensor. |
Repair Instructions
Perform the
Diagnostic Repair Verification after completing the diagnostic
procedure.
Control Module References for engine control module
replacement, setup, and programming
|