Test G: Intake Air Temperature 2 (IAT2) Sensor
PINPOINT TEST G: INTAKE AIR TEMPERATURE 2 (IAT2) SENSORFlow Chart:
This pinpoint test is intended to diagnose the following:
- Harness circuits: IAT2 and SIGRTN
- IAT2 sensor
- Powertrain control module (PCM) (12A650)
IAT2 Sensor Connector
IAT2 Sensor Connector:
PCM Connector
PCM Connector:
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G1 : PRELIMINARY DIAGNOSIS FOR DIAGNOSTIC TROUBLE CODES (DTCS) P0096, P0097, OR P0098
- Carry out a visual inspection.
- Retrieve and record any continuous and on-demand DTCs
- Record the freeze frame data.
- Clear all the DTCs.
- Carry out the KOEO and KOER self-test. Quick Test Description
- Are DTCs P0096, P0097 or P0098 present?
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G2 : DIAGNOSTIC TROUBLE CODE (DTC) P0096
- Inspect the IAT 2 sensor circuitry at the sensor and PCM.
- Are all connectors and terminals OK?
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G3 : CHECK FOR IAT2 SENSOR DTCS
- Carry out the KOEO and KOER self-test. Quick Test Description
- Are any other DTCs present?
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G4 : CHECK THE IAT2 SENSOR OPERATION
- Clear the continuous DTCs.
- Ignition ON, engine OFF.
- Access the PCM and monitor the IAT2 PID.
- Access the PCM and monitor the EOT PID.
- Record the IAT2 PID value
- Drive the vehicle while monitoring the IAT2 sensor PID
- Operate the vehicle until the EOT PID is greater then 80°C (176°F)
- Idle the engine for 10 minutes
- Does the IAT2 PID value change from the initial recorded value?
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G5 : DIAGNOSTIC TROUBLE CODE (DTC) P0097
NOTE: Refer to the PCM and component connector pin numbers at the beginning of this pinpoint test.
- Ignition OFF.
- IAT2 Sensor connector disconnected.
- The IAT2 sensor is disconnected to simulate the opposite DTC.
- Carry out the KOEO and KOER self-test. Quick Test Description
- Is DTC P0098 present?
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G6 : 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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G7 : DIAGNOSTIC TROUBLE CODE (DTC) P0098
- Ignition OFF.
- IAT2 Sensor connector disconnected.
- Connect a 5 amp fused jumper wire between the following:
- Ignition ON, engine OFF.
- Carry out the KOEO and KOER self-test. Quick Test Description
- Is DTC P0097 present?
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G8 : CHECK THE SIGNAL CIRCUIT FOR AN OPEN
- Ignition OFF.
- PCM connector disconnected.
- Measure the resistance between:
- Is the resistance less than 5 Ohm?
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G9 : CHECK THE SIGNAL RETURN CIRCUIT FOR AN OPEN
- Ignition OFF.
- Measure the resistance between:
- Is the resistance less than 5 Ohm?
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G10 : CHECK THE SIGNAL CIRCUIT FOR A SHORT TO VOLTAGE
- Ignition ON, engine OFF.
- Measure the voltage between:
- Is any voltage indicated?
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G11 : 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?
