GSIC - Global Service Information Center

### DTC P0100/31 Mass or Volume Air Flow Circuit

DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

When using intelligent tester:

READ DATA LIST (MASS AIR FLOW RATE)

CHECK MASS AIR FLOW METER (POWER SOURCE)

CHECK ECM (VG VOLTAGE)

CHECK WIRE HARNESS (MASS AIR FLOW METER - ECM)

CHECK WIRE HARNESS (MASS AIR FLOW METER - MAIN RELAY)

CHECK ECM (SENSOR GROUND)

CHECK WIRE HARNESS (MASS AIR FLOW METER- ECM)

When not using intelligent tester:

CHECK ECM (VG VOLTAGE)

CHECK MASS AIR FLOW METER (POWER SOURCE)

CHECK WIRE HARNESS (MASS AIR FLOW METER - ECM)

CHECK WIRE HARNESS (MASS AIR FLOW METER - MAIN RELAY)