DTC B0158
Diagnostic Instructions
DTC Descriptor
| DTC B0158 02: Ambient Air Temperature Sensor
Circuit Short to Ground |
| DTC B0158 05: Ambient Air Temperature Sensor
Circuit High Voltage/Open |
Diagnostic Fault Information
Circuit
|
Short to Ground
|
Open/High Resistance
|
Short to Voltage
|
Signal Performance
|
Ambient Air Temperature Sensor Signal
|
B0158 02
|
B0158 05
|
B0158 05
|
-
|
Low Reference
|
-
|
B0158 05
|
B0158 05
|
-
|
|
| |
Circuit/System Description
The instrument cluster monitors the ambient air temperature
sensor with a low reference circuit and 5 V signal circuit. The
instrument cluster monitors the voltage drop across the sensor,
which is proportional to temperature. When the ambient air
temperatures are cold, the resistance of the sensor is high and the
voltage signals are high. When the ambient air temperatures are
hot, the resistance of the sensors is low and the voltage signals
are low. The instrument cluster converts the voltage value to a
temperature value of Celsius or Fahrenheit that will be displayed
by the driver information center.
Conditions for Running the DTC
The system voltage is 9-16 V.
Conditions for Setting the DTC
B0158 02
The instrument cluster detects the sensor signal circuit is more
than 88°C (190°F).
B0158 05
The instrument cluster detects the sensor signal circuit is less
than -40°C (-40°F).
Action Taken When the DTC Sets
The instrument cluster uses a default air temperature value for
further calculations. The driver information center displays
---°C ( ---°F).
Conditions for Clearing the DTC
The DTC will become history if the instrument cluster no longer
detects a malfunction.
Reference Information
Schematic Reference
Instrument Cluster Schematics
Connector End View Reference
Component Connector End Views
Description and Operation
Driver Information Center (DIC) Description and Operation
Electrical Information Reference
Scan Tool Reference
Control Module References for scan tool information
Circuit/System Verification
Ignition ON, observe the scan tool Ambient Air Temperature
parameter. The reading should be between -40°C (-40°F) to
+88°C (+190°F) and change with air temperature changes.
Circuit/System Testing
| 1. |
Ignition OFF, disconnect the
harness connector at the B9 Ambient Air Temperature Sensor.
|
| 2. |
Ignition OFF, test for less
than 5 Ω between the low reference circuit terminal 2 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 P16 Instrument Cluster. |
| 3. |
Ignition ON, test for 4.8-5.2
V between the signal circuit terminal 1 and ground. |
| ⇒ |
If greater than the specified range, test the
signal circuit terminal 1 for a short to voltage. If the circuit
tests normal, replace the P16 Instrument Cluster. |
| ⇒ |
If less than the specified range, test the signal
circuit for a short to ground or an open/high resistance. If the
circuit tests normal, replace the P16 Instrument Cluster. |
| 4. |
If all circuits test normal,
test or replace the B9 Ambient Air Temperature Sensor .
|
Component Testing
Static Test
| 1. |
Test the B9 Ambient Air
Temperature Sensor by varying the sensor temperature while
monitoring the sensor resistance. |
| ⇒ |
If not within the specified range, replace the B9
Ambient Air Temperature Sensor. |
Repair Instructions
Perform the
Diagnostic Repair Verification after completing the diagnostic
procedure.
|
