Inspection Of Pcm (Ecm) And Its Circuits - Suzuki GRAND VITARA XL-7 Owner's Manual

6-1-36 ENGINE GENERAL INFORMATION AND DIAGNOSIS (H27 ENGINE)
1. PCM (ECM)
2. PCM (ECM) connector (Viewed from harness side)

Inspection of PCM (ECM) and its Circuits

PCM (ECM) and its circuits can be checked at PCM (ECM) wiring
couplers by measuring voltage and resistance.
CAUTION:
PCM/ECM cannot be checked by itself. It is strictly pro-
hibited to connect voltmeter or ohmmeter to PCM (ECM)
with couplers disconnected from it.
VOLTAGE CHECK
1) Remove PCM (ECM) cover from bracket referring to PCM
(ECM) REMOVAL.
2) Check voltage at each terminal of couplers connected.
NOTE:
As each terminal voltage is affected by the battery volt-
age, confirm that it is 11 V or more when ignition switch
is ON.