TOHATSU 200 Series Service Manual page 83

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2. EMT sensor 1 signal /GND line open circuit
inspection
Turn the combination switch OFF and disconnect
the EMT sensor 1 2P connector
Turn the combination switch ON.
Measure the voltage between the EMT sensor 1 2P
connector
Black) terminal and No.2 (Green) terminal.
Is the measurement within 4.75 – 5.25 V?
YES
NO
DTC 141-1, 141-2 (ECT SENSOR 3
(EMT SENSOR 2) VOLTAGE IS TOO
LOW OR TOO HIGH)
DTC 141-1 (ECT SENSOR 3 (EMT SENSOR 2)
VOLTAGE IS TOO LOW)
1. Symptom reproduction test
Turn the combination switch OFF.
Disconnect the EMT sensor 2 2P connector
ECM connector A
joint connector 1
Clear the DTC (page 5-2).
• Continue the procedure if the DTC does not
Turn the combination switch ON.
Measure the EMT sensor 2 voltage using the HDS.
Is the measurement within 0.08 – 4.92 V?
YES
NO
2. EMT sensor 2 signal line short circuit inspection
Turn the combination switch OFF and disconnect
the EMT sensor 2 2P connector
Turn the combination switch ON.
Measure the voltage between the EMT sensor 2 2P
connector
terminal and engine ground.
Is the measurement within 4.75 – 5.25 V?
YES
NO
main wire harness side No.1 (Red/
– Replace the EMT sensor 1 with a new one
and recheck.
– Repair open in the Red/Black or Green
wire harness between the ECM and EMT
sensor 1. If the main wire harness is
correct, replace the ECM with a new one
and recheck.
, ECM connector B
and then reconnect them.
clear.
– Temporary failure
reappear).
– GO TO STEP 2.
main wire harness side No.1 (Red)
– Replace EMT sensor 2 with a new one and
recheck.
– Repair short in the main wire harness
between the ECM and EMT sensor 2. If
the main wire is correct, replace the ECM
with a new one and recheck.
.
,
,
(code does not
.
EMT SENSOR 2 2P CONNECTOR
MAIN WIRE HARNESS SIDE
FUEL SYSTEM
EMT SENSOR 1 2P CONNECTOR
MAIN WIRE HARNESS SIDE
SG2
(Green)
TOH1
(Red/Black)
TOH2
(Red)
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