Suzuki Ignis Service Manual page 3273

6-72 ENGINE GENERAL INFORMATION AND DIAGNOSIS
Step
6 Check MAF sensor signal circuit.
1) Turn ON ignition switch.
2) Measure voltage between "PNK/BLK" wire terminal of
MAF sensor connector and engine ground.
Is voltage 0 V?
7 Check MAF sensor signal circuit.
1) Disconnect connectors from ECM with ignition switch
turned OFF.
2) Measure resistance between "PNK/BLK" wire termi-
nal of MAF sensor connector and vehicle body
ground.
Is resistance infinity?
8 Check MAF sensor signal circuit.
1) Measure resistance between "PNK/BLK" wire termi-
nal of MAF sensor connector and "C63-14" terminal of
ECM connector.
Is resistance below 3 Ω?
9 Check MAF sensor output signal.
1) Connect ECM connectors to MAF sensor and ECM
with ignition switch turned OFF.
2) Check voltage between "C63-14" and "C63-28" under
the following condition.
Voltage between "C63-14" and "C63-28" of ECM con-
nector at ignition switch ON, leaving engine stop: 0.5
– 1.2 V
Idling: 1.3 – 1.8 V
Is each value as specified?
Action Yes
Go to Step 7. "PNK/BLK" wire
shorted to other cir-
cuit.
Go to Step 8. "PNK/BLK" wire
shorted to ground
circuit.
Go to Step 9. "PNK/BLK" wire in
open or high resis-
tance circuit.
Substitute a known- Faulty MAF and IAT
good ECM and sensor.
recheck.
No