6E1-28
ENGINE AND EMISSION CONTROL SYSTEM
SH410
CODE NO.19 (P0115) ECT SENSOR CIRCUIT
(SIGNAL VOLTAGE HIGH OR LOW)
1. ECM (PCM)
2. ECT sensor
3. ECT sensor connector
4. To other sensors
5. To combination meter
NOTE:
When Code No.11 (P0105), 13 (P0120), 18 (P0110) and
19 (P0115) are indicated together, it is possible that “B/
Or” wire is open or “E02-9” terminal connection is
poor.
STEP
ACTION
YES
NO
1
1) Disconnect ECT sensor coupler with ignition
switch OFF.
2) Check voltage between “Lg/B” wire terminal
of ECT sensor coupler and ground with igni-
tion switch ON.
Is voltage about 4 – 5 V?
Go to Step 2.
“Lg/B” wire open or short.
Poor “E02-8” connection.
2
1) Connect ECT sensor couple terminals using
service wire.
2) Check voltage between “Lg/B” wire terminal
of ECT sensor coupler and ground with igni-
tion switch ON.
Is voltage 0.15 V or less?
Go to Step 3.
“B/Or” wire open or poor
“E02-9” connection.
If wire and connection are OK,
substitute a known-good ECM
(PCM) and recheck.
3
1) Perform ECT SENSOR INSPECTION in this
section.
Is ECT sensor in good condition?
Poor connection of
ECT sensor connec-
tor terminals.
If connection is OK,
substitute a known-
good ECM (PCM)
and recheck.
Faulty ECT sensor.
Fig. for STEP 1
Fig. for STEP 2
1. ECT sensor connector disconnected
2. Engine ground
1. ECT sensor connector disconnected
2. Service wire
3. Engine ground
NOTE:
Upon completion of inspection and repair work, perform DTC Confirmation Procedure, referring to page
6E1-33 to confirm that the trouble has been corrected.