6-2-68 ENGINE GENERAL INFORMATION AND DIAGNOSIS (M13 ENGINE)
9 Check MAF sensor output signal.
1) Connect connectors to MAF sensor and ECM with
ignition switch turned OFF.
2) Check voltage between “E22-14” and “E22-32” under
the following condition.
Voltage between “E22-14” and “E22-32” of ECM con-
nector at ignition switch ON, leaving engine stop: 0.5
– 1.2 V
Idling: 1.0 – 1.8 V
Is each value as specified?
Substitute a known-
good ECM and
recheck.
Faulty MAF and IAT
sensor.
Step Action Yes No
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