2010 Cadillac Truck Escalade/ESV RWD V8-6.2L Page 1747
Typical Scan Tool Data
Circuit/System Description
The mass air flow (MAF) sensor is integrated with the intake air temperature (IAT) sensor. The MAF sensor is an air flow meter that measures the
amount of air entering the engine. The engine control module (ECM) uses the MAF sensor signal to provide the correct fuel delivery for all engine
speeds and loads. A small quantity of air entering the engine indicates a deceleration or idle condition. A large quantity of air entering the engine
indicates an acceleration or high load condition.
The ECM applies 5 V to the MAF sensor on the MAF sensor signal circuit. The sensor uses the voltage to produce a frequency based on the inlet
air flow through the sensor bore. The frequency varies within a range of near 2,000 Hertz at idle to near 9,700 Hertz at maximum engine load.
Conditions for Running the DTC
* The engine is running for more than 1 s.
* The engine speed is at least 300 RPM.
* The ignition signal is greater than 9 V.
* The above conditions are met for greater than 1 s.
* These DTCs run continuously when the above conditions are met.
Conditions for Setting the DTC
P0102
The ECM detects that the MAF Sensor parameter is less than 1,500 Hz or 1.2 g/s for greater than 5 s.
P0103
The ECM detects that the MAF Sensor parameter is more than 14,500 Hz or 332 g/s for greater than 5 s.
Action Taken When the DTC Sets
DTCs P0102 and P0103 are Type B DTCs.
Conditions for Clearing the MIL/DTC
DTCs P0102 and P0103 are Type B DTCs.
Diagnostic Aids
* Verify the integrity of the air induction system by inspecting for the following conditions:
- Any water intrusion in the induction system
- Any contamination or debris on the sensing elements of the MAF sensor
- Damaged components
* Verify that any electrical aftermarket devices are properly connected and grounded. Refer to Checking Aftermarket Accessories (See:
Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic Procedures/Checking Aftermarket
