Engine General Information And Diagnosis (G16 / J20 Engines) - Suzuki SQ416 Service Manual

6-2 ENGINE GENERAL INFORMATION AND DIAGNOSIS (G16 / J20 ENGINES)

ENGINE DIAGNOSIS
Engine Diagnostic Flow Table
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 prohib-
ited 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 voltage,
confirm that it is 11 V or more when ignition switch is ON.
1. PCM (ECM)
2. PCM (ECM) connector
(Viewed from harness side)