Inspection Of Pcm (Ecm) And Its Circuits; Voltage Check - Suzuki Grand Vitara XL-7 Service Manual

ENGINE DIAGNOSIS (RHZ ENGINE WITH SINGLE-CONNECTOR ECM) 6-25

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) Disconnect ECM from bracket referring to "ENGINE CONTROL
MODULE" in this section.
2) Remove harness cover (2) from ECM connector assembly (3)
by removing clamp (4).
3) Remove ECM cover (1) from ECM connector after loosening
screw (5).
6. Lock lever
4) Measure voltage at each terminal with ignition switch turned on
according to Diag. Flow Table after connecting ECM connector
(1) to ECM (2) securely.
NOTE:
As each terminal voltage is affected by the battery voltage,
confirm that it is 11 V or more when ignition switch is ON.
3. ECM cover
5) After measuring, disconnect ECM connector (3) from ECM (2)
using two screwdrivers (1) as shown in figure.