Suzuki GA413, Service Manual

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6E-32 ENGINE AND EMISSION CONTROL SYSTEM
DTC NO.19 ENGINE COOLANT TEMPERATURE SENSOR CIRCUIT
(SIGNAL VOLTAGE LOW OR HIGH)
WIRING DIAGRAM
1. ECT sensor
2. ECT sensor connector
3. Combination meter
4. ECM connector
5. ECM
TROUBLE SHOOTING
STEP ACTION YES NO
1 Did you perform “ENGINE DIAGNOSTIC FLOW
TABLE” in Section 6?
Go to Step 2. Go to“ENGINE DIAG-
NOSTIC FLOW TABLE”.
2 1) With ignition switch OFF position, disconnect
ECT sensor electrical connector.
2) Turn ignition switch ON position, leaving en-
gine OFF.
3) Measure voltage from terminal “c” of ECT sen-
sor connector to ground.
Is voltage within 4-5V?
Go to Step 3. “Lg/W” wire open or short.
Poor connection of ECM
connector terminal.
If OK, substitute a known-
good ECM and recheck.
3 1) Connect jumper wire from terminal “a” to “c” of
ECT sensor connector.
2) Measure voltage from terminal “c” of IAT sen-
sor connector to ground.
Is voltage below 0.15V?
Go to Step 4. “BI/Y” wire open.
Poor connection of ECM
connector terminal.
If OK, substitute a known-
good ECM and recheck.
4 1) Perform “ECT sensor inspection” in this sec-
tion.
Is resistance within specified value?
Poor connection of ECT
sensor connector termi-
nal.
If OK, substitute a known-
good ECM and recheck.
Faulty ECT sensor.
NOTE:
Upon completion of inspection and repair work, perform “DTC Confirmation Procedure” in this section and
confirm that the trouble has been corrected.