DTC P0106 - LDE or LLU
Diagnostic Instructions
DTC Descriptor
DTC P0106 00: Manifold Absolute Pressure (MAP)
Sensor Performance
Diagnostic Fault Information
Circuit
|
Short to Ground
|
Open/High Resistance
|
Short to Voltage
|
Signal Performance
|
MAP Sensor 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
(3.8-7.6 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 inlet 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 an 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
• |
DTCs P0102 00, P0103 00,
P0107 00, P0108 00, P0112 00, P0113 00,
P0117 00, P0118 00, P0335 00, or P0336 00 are
not set. |
• |
The engine speed is between
400-6 500 RPM. |
• |
The engine coolant temperature (ECT) is between
70-125°C (158-257°F). |
• |
The inlet air temperature (IAT) sensor is between
-20 to +125°C (-4 to +257°F). |
• |
The DTC runs continuously when the above
conditions are met. |
Conditions for Setting the DTC
The ECM detects that the actual MAP signal is not within the
predicted range for greater than 15 seconds.
Action Taken When the DTC Sets
DTC P0106 00 is a Type B DTC.
Conditions for Clearing the DTC
DTC P0106 00 is a Type B DTC.
Diagnostic Aids
A high resistance condition in the MAP sensor circuits will
cause this DTC.
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
- Ignition ON, observe the DTC information with a scan
tool. Verify that DTC P0107 00, P0108 00, or
P0697 00 is not set.
- Verify none of the following conditions exist:
- Determine the current vehicle testing altitude.
Compare the MAP Sensor parameter to the reading in the
Altitude Versus Barometric Pressure .
- Start the engine and observe the scan tool MAP Sensor
parameter. The MAP sensor pressure parameter should change while
starting the engine.
- Engine running, observe the scan tool MAP Sensor
parameter. The reading should be between 26-52 kPa
(3.8-7.6 PSI).
- Snap the throttle while observing the scan tool MAP
Sensor parameter. The MAP sensor pressure parameter should change
rapidly when the throttle position changes.
- 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
- Verify the integrity of the entire air induction
system by inspecting for the following conditions:
• |
Loose or improper installation |
• |
An air flow restriction |
• |
Improperly routed vacuum hoses |
• |
In cold climates, inspect for any snow or ice
buildup |
- Ignition OFF, disconnect the harness connector at the
B74 Manifold Absolute Pressure Sensor.
- Ignition OFF for 1 minute, test for less than
5 Ω between the low reference circuit terminal 2 and
ground.
⇒ |
If greater 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 low
reference circuit for an open/high resistance. If the circuit tests
normal, replace the K20 Engine Control Module. |
- Ignition ON, test for 4.8-5.2 V between the
B74 Manifold Absolute Pressure Sensor 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 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. |
- Verify the scan tool MAP Sensor parameter is
0.00 V.
⇒ |
If greater than the specified value, test the
signal circuit terminal 3 for a short to voltage. If the
circuit tests normal, replace the K20 Engine Control
Module. |
- Install a 3 A fused bridging wire between the
B74 Manifold Absolute Pressure Sensor signal circuit
terminal 3 and the 5 V reference circuit terminal 1.
Verify the scan tool MAP sensor parameter is greater than
126 kPa (18.27 PSI).
⇒ |
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. |
- 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. 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.
|