DTC P0107 or P0108 (LDD)
Diagnostic Instructions
DTC Descriptors
| 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
|
P0107 00, P0697 00
|
P0106 00, P0107 00
|
P0108 00, P0697 00
|
P0106 00
|
MAP Sensor Signal
|
P0107 00
|
P0106 00, P0107 00
|
P0108 00
|
P0106 00
|
Low Reference
|
-
|
P0106 00, P0108 00
|
-
|
P0106 00
|
|
| |
Typical Scan Tool Data
MAP Sensor
Circuit
|
Short to Ground
|
Open
|
Short to Voltage
|
Operating Conditions: Engine operating
in closed loop, idling, and accessories OFF.
Parameter Normal Range: 26-52 kPa (3.8
to 7.6 PSI) (Varies with altitude)
|
5V Reference
|
0 kPa (0 PSI)
|
0 kPa (0 PSI)
|
127 kPa (18.4 PSI)
|
Sensor Signal
|
0 kPa (0 PSI)
|
0 kPa (0 PSI)
|
127 kPa (18.4 PSI)
|
Low Reference
|
-
|
127 kPa (18.4 PSI)
|
-
|
|
| |
Circuit/System Description
The manifold absolute pressure (MAP) sensor responds to pressure
changes in the intake manifold. The pressure changes occur based on
the engine load. The engine control module (ECM) supplies 5 V to
the MAP sensor on the 5 V reference circuit. The ECM provides a
ground on the low reference circuit. The MAP sensor provides a
signal to the ECM on the MAP sensor signal circuit which is
relative to the pressure changes in the manifold. The ECM detects a
low signal voltage at a low MAP, such as during an idle or a
deceleration. The ECM detects a high signal voltage at a high MAP,
such as the ignition is ON, with the engine OFF, or at a wide open
throttle (WOT). The MAP sensor is also used to determine the
barometric pressure (BARO).
Conditions for Running the DTC
| • |
The ignition is ON, or the
engine is running. |
| • |
The DTCs run continuously when
the above condition is met. |
Conditions for Setting the DTC
P0107 00
The ECM detects that the MAP sensor signal is less than 3.5 kPa
(0.5 PSI) for greater than 5 s.
P0108 00
The ECM detects that the MAP sensor signal is greater than 115 kPa
(16.7 PSI) for greater than 5 s.
Action Taken When the DTC Sets
| • |
DTCs P0107 00 and P0108 00 are
Type B DTCs. |
| • |
The BARO will not be
updated. |
Conditions for Clearing the DTC
DTCs P0107 00 and P0108 00 are Type B DTCs.
Diagnostic Aids
If the condition is intermittent, move the related harnesses and
connectors, with the engine operating, while monitoring the scan
tool parameters for the component. The scan tool parameters will
change abruptly if there is a condition with the circuit or a
connection.
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
For equivalent regional tools, refer to
Special Tools .
Circuit/System Verification
| 1. |
Ignition ON, observe the DTC
information with a scan tool. Verify that DTC P0697 00 is not
set. |
| 2. |
Engine running, observe the
scan tool MAP Sensor parameter. The reading should be between 26-52
kPa (3.8-7.6 PSI). |
| 3. |
Operate the vehicle within the
conditions for running the DTC. 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 Manifold Absolute Pressure
Sensor. |
| 2. |
Ignition OFF for 90 s, test
for less than 5 Ω between the low reference circuit terminal
2 and earth. |
| ⇒ |
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. |
| 3. |
Ignition ON, test for 4.8-5.2
V between the 5 V reference circuit terminal 1 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. |
| 4. |
Verify the scan tool MAP
Sensor parameter is less than 0.00 V. |
| ⇒ |
If greater than the specified range, test the
signal circuit terminal 3 for a short to voltage. If the circuit
tests normal, replace the K20 Engine Control Module. |
| 5. |
Install a 3 A 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 126 kPa. |
| ⇒ |
If less than the specified range, test the signal
circuit for short to ground or an open/high resistance. If the
circuit tests normal, replace the K20 Engine Control Module. |
| 6. |
If all circuits test normal,
test or replace the B74 Manifold Absolute Pressure Sensor.
|
Component Testing
Static Test
The ignition ON engine OFF, MAP Sensor scan tool value should
decrease within 4 kPa (0.6 PSI) by the amount of vacuum applied
with the EN 23738-A mityvac or EN 35555
mityvac . For example, at 92 kPa (13.3 PSI), the MAP Sensor
scan tool reading should be between 71-79 kPa (10.29-11.45 PSI)
with 17 kPa (2.47 PSI) of vacuum applied to the sensor.
Ignition ON, engine OFF, MAP sensor parameter
|
MAP sensor parameter with 5 inches of vacuum applied
|
MAP sensor parameter with 10 inches of vacuum applied
|
100
|
79 to 87
|
62 to 70
|
90
|
69 to 77
|
52 to 60
|
80
|
59 to 67
|
42 to 50
|
70
|
49 to 57
|
32 to 40
|
60
|
39 to 47
|
22 to 30
|
|
| |
Repair Instructions
Perform the
Diagnostic Repair Verification after completing the diagnostic
procedure.
|
