Suzuki RA410, Manual

Page: 395 / 761

6E1-30 ENGINE AND EMISSION CONTROL SYSTEM
DTC NO. 19 ENGINE COOLANT TEMPERATURE SENSOR CIRCUIT
(SIGNAL VOLTAGE LOW OR HIGH)
When code No. 11, 13, 14, 18 and 19 are indicated together, it is possible that “Or” wire is open or C14 terminal
connections are poor.
WIRING DIAGRAM
1. ECT sensor
2. ECT sensor connector
3. Combination meter
4. ECM/PCM connector
5. ECM/PCM
A3
C14
Lg
Or
TROUBLESHOOTING
STEP ACTION YES NO
1 Did you perform ENGINE DIAGNOSIS FLOW
TABLE in SECTION 6?
Go to Step 2. Go to ENGINE DIAGNO-
SIS FLOW TABLE in
SECTION 6.
2 1) With ignition switch at OFF position, disconnect
ECT sensor connector (1).
2) Turn ignition switch to ON position, without run-
ning engine.
3) Measure voltage from terminal “c” of ECT sen-
sor connector to ground.
Is voltage within 4 – 5V?
Go to Step 3. “Lg” wire open or short.
Poor connection of ECM/
PCM connector terminal.
If OK, substitute a known-
good ECM/PCM and re-
check.
3 1) Connect jumper wire (2) from terminal “a” to “c”
of ECT sensor connector (1).
2) Measure voltage from terminal “c” of ECT sen-
sor connector to ground.
Is voltage below 0.15V?
Go to Step 4. “Or” wire open.
Poor connection of ECM/
PCM connector terminal.
If OK, substitute a known-
good ECM/PCM and re-
check.
4 1) Perform ECT SENSOR INSPECTION in this
section.
Is resistance within specified value?
Poor connection of ECT
sensor connector termi-
nal.
If OK, substitute a known-
good ECM/PCM and re-
check.
Faulty ECT sensor.