DTC P0106 (LUJ)
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 5 V 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)
|
5 V 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
• |
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) sensor is between 70-125°C (158-257°F). |
• |
The intake 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 s.
Action Taken When the DTC Sets
DTCs P0106 00 is a Type B DTC.
Conditions for Clearing the DTC
DTCs 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
1. |
Ignition ON, observe the DTC
information with a scan tool. Verify that DTC P0107 00, P0108 00,
or P0697 00 is not set. |
2. |
Verify none of the following
conditions exist: |
3. |
Start the engine and observe
the scan tool MAP Sensor parameter. The MAP sensor pressure
parameter should change while starting the engine. |
4. |
Engine running, observe the
scan tool MAP Sensor parameter. The reading should be between 26-52
kPa (3.8-7.6 PSI). |
5. |
Snap the throttle while
observing the scan tool MAP Sensor parameter. The MAP sensor
pressure parameter should change rapidly when the throttle position
changes. |
6. |
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 |
|
• |
An air flow restriction
|
|
• |
Improperly routed vacuum
hoses |
|
• |
In cold climates, inspect for
any snow or ice buildup |
2. |
Ignition OFF, disconnect the
harness connector at the B74 Manifold Absolute Pressure
Sensor. |
3. |
Ignition OFF for 1 m, 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. |
⇒ |
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 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. |
5. |
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. |
6. |
Install a 3 A fused jumper
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. |
7. |
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.
|