TOHATSU BFT115A Service Manual page 146

FUEL SYSTEM
DTC 6-2 (ECT SENSOR 1 VOLTAGE IS TOO HIGH)
• When the DTC code 6-2, 7-2, 10-2, 22-2, 140-2,
141-2, and 143-2 are indicated at the same time, the
ground line (SG2) is open.
1. Symptom reproduction test
Turn the combination switch OFF.
Disconnect the ECT sensor 1 (2P) connector
ECM connector A
and joint connector 2
them.
Clear the DTC (page 5-6).
• Continue the procedure if the DTC does not
clear.
Turn the combination switch ON.
Measure the ECT sensor 1 voltage using the HDS.
Is the measurement within 0.08 – 4.92 V?
YES
NO
2. ECT sensor 1 signal/GND line open circuit
inspection
Turn the combination switch OFF and disconnect
the ECT sensor 1 (2P) connector
Turn the combination switch ON.
Measure the voltage between the ECT sensor 1
(2P) connector
(Red/White)
terminal.
Is the measurement within 4.75 – 5.25 V?
YES
NO
5-28
, ECM connector B
12
, and then reconnect
28
– Temporary failure (code
reappear)
– GO TO STEP 2.
main wire harness side No.1
6
terminal and No.2
– Replace the ECT sensor 1 with a new one
and recheck.
– Repair open in the Red/White wire or
Green/Red wire. If the main wire harness
is normal, replace the ECM with a new one
and recheck.
,
6
,
13
does not
. ECT SENSOR 1 (2P) CONNECTOR
6
MAIN WIRE HARNESS SIDE
(Green/Red)
SG2
(Green/Red)
6
TE
(Red/White)