Test H: Barometric Pressure (BARO) Sensor
PINPOINT TEST H: BAROMETRIC PRESSURE (BARO) SENSORFlow Chart:
This pinpoint test is intended to diagnose the following:
- Harness circuits: BARO, SIGRTN, and VREF
- BARO sensor
- Powertrain control module (PCM) (12A650)
BARO Sensor:
BARO Sensor Connector
BARO Sensor Connector:
PCM Connector
PCM Connector:
NOTE: Compare the BARO sensor value with the local barometric values.
BARO Sensor:
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H1 : PRELIMINARY DIAGNOSIS FOR DIAGNOSTIC TROUBLE CODES ( DTCS) P0107 OR P0108
- Carry out a visual inspection.
- Retrieve and record all DTCs.
- Record the freeze frame data.
- Clear the DTCs.
- Carry out the KOEO self-test. Quick Test Description
- Are DTCs P0107 or P0108 present?
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H2 : DIAGNOSTIC TROUBLE CODE (DTC) P0107
NOTE: Refer to the PCM and component connector pin numbers at the beginning of this pinpoint test.
- Ignition OFF.
- BARO Sensor connector disconnected.
- Ignition ON, engine OFF.
- Measure the voltage between:
- Is the voltage between 4.5 V - 5.5 V?
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H3 : SIMULATE THE OPPOSITE DTC
- Ignition OFF.
- Ignition ON, engine OFF.
- Connect a 5 amp fused jumper wire between the following:
- Carry out the KOEO self-test. Quick Test Description
- Is DTC P0108 present?
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H4 : CHECK THE SIGNAL CIRCUIT FOR A SHORT TO GROUND
- Ignition OFF.
- PCM connector disconnected.
- Measure the resistance between:
- Is the resistance greater than 10 kOhm?
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H5 : CHECK THE SIGNAL CIRCUIT FOR AN OPEN
- Measure the resistance between:
- Is the resistance less than 5 Ohm?
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H6 : DIAGNOSTIC TROUBLE CODE (DTC) P0108
NOTE: Refer to the PCM and component connector pin numbers at the beginning of this pinpoint test.
- Ignition OFF.
- BARO Sensor connector disconnected.
- The BARO sensor is disconnected to simulate the opposite DTC.
- Ignition ON, engine OFF.
- Carry out the self-test.
- Is DTC P0107 present?
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H7 : CHECK THE SIGNAL CIRCUIT FOR A SHORT TO VOLTAGE
- Ignition OFF.
- PCM connector disconnected.
- Ignition ON, engine OFF.
- Measure the voltage between:
- Is any voltage indicated?
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H8 : CHECK THE SIGNAL RETURN CIRCUIT FOR AN OPEN
- Ignition OFF.
- Measure the resistance between:
- Are the resistances less than 5 ohms?
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H9 : CHECK FOR CORRECT PCM OPERATION
- Disconnect all the PCM connectors.
- Visually inspect for:
- pushed out pins
- corrosion
- Connect all the PCM connectors and make sure they seat correctly.
- Carry out the PCM self-test and verify the concern is still present.
- Is the concern still present?
