DTC B0158
DTC B0158 |
Diagnostic Instructions |
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Perform the
Diagnostic System Check - Vehicle
prior to using this diagnostic procedure.
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Review
Strategy Based Diagnosis
for an overview of the diagnostic approach.
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Diagnostic Procedure Instructions
provides an overview of each diagnostic category.
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DTC Descriptors |
DTC B0158 02
Ambient temperature sensor. 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.
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B0158 02
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B0158 05
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B0158 05
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-
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Low Reference
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-
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B0158 05
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B0158 05
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-
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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
Driver Information System Schematics
Connector End View Reference
Component Connector End Views
Description and Operation
Driver Information Center (DIC) Description and Operation
Electrical Information Reference
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Circuit Testing
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Connector Repairs
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Testing for Intermittent Conditions and Poor Connections
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Wiring Repairs
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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.
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2. |
Ignition OFF, test for less than 5 Ω between the low reference circuit terminal 2 and ground.
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3. |
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.
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4. |
Ignition ON, test for 4.8-5.2 V between the signal circuit terminal 1 and ground.
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5. |
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.
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6. |
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 P16 Instrument Cluster.
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7. |
If all circuits test normal, test or replace the B9 Ambient Air Temperature Sensor.
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Component Testing |
Static Test
1. |
Test the B9 Ambient Air Temperature Sensor by varying the sensor temperature while monitoring the sensor resistance.
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2. |
Compare the readings with the
Ambient Air Temperature Sensor Resistance
.
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3. |
If not within the specified range, replace the B9 Ambient Air Temperature Sensor.
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Repair Instructions |
Perform the Diagnostic Repair Verification after completing the diagnostic procedure.
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Ambient Air Temperature Sensor Replacement
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Control Module References
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