The MAF sensor is an air flow meter that measures the amount of air that enters the engine. It is installed between the air cleaner and the turbocharger. When the amount of air entering the engine is small, it indicates deceleration or idling speed. When the amount of air entering the engine is large, it indicates acceleration or a high load state. The ECM calculates a predicted MAF value and compares the actual MAF sensor voltage signal to the predicted MAF value. This comparison determines if the signal is stuck, or is too low or too high for a particular operating condition. If the ECM detects that the actual MAF sensor signal voltage is not within the predetermined range of the calculated MAF predicted value, the DTC is set.This illustration show you guide on how to solve ISUZU F series 4HK1 truck P0101 trouble.
Preparation:
2023 2019 Isuzu G-IDSS Diagnostic Software Free Download (Troubleshooting Guide Included)
ISUZU IDSS Diagnostic Adapter Hight Quality
Procedures:
Air intake/exhaust system inspection
1) Inspect for the following. Is the result normal?
Yes
=>Go to Individual harness connector inspection.
No
Repair or replace as necessary.
=>Go to Repair verification.
Individual harness connector inspection
1) Inspect the following for poor connections. Is the connection status normal?
LHD
RHD
2) Inspect for poor connections at the ECM harness connector (pins 22, 23, and 69 of FB24). Is the connection status normal?
3) Are all of the results normal?
Yes
=>Go to Inspection for high resistance in MAF sensor circuit.
No
Repair the connections as necessary.
=>Go to Repair verification.
Inspection for high resistance in MAF sensor circuit
1) Inspect the MAF sensor circuit for high resistance for the following. Is the result normal?
LHD
RHD
Yes
Replace the MAF and IAT sensor.
Refer to:ISUZU 4HK1 Truck MAF & IAT Sensor Removal and Installation Guide
=>Go to Repair verification.
No
Repair the circuit as necessary.
=>Go to Repair verification.
Repair verification
1) Clear the DTC with a scan tool.
2) Turn OFF the ignition switch for 30 seconds or more.
3) Start the engine.
4) Operate the vehicle under the conditions for running the DTC.
5) Observe the DTC information with a scan tool
More ISUZU repair,please refer to:ISUZU Truck Repair.
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