Suzuki DL1000 Service Manual

4-38 FI SYSTEM
“C15” ECT SENSOR CIRCUIT MALFUNCTION
INSPECTION
DETECTED CONDITION POSSIBLE CAUSE
High engine coolant temp. (Low voltage – Low
resistance)
Low engine coolant temp. (High voltage – High
resistance)
• B/Bl circuit shorted to ground.
• B/Br circuit open.
• ECT sensor malfunction.
• ECM malfunction.
• Remove the vacuum damper. ( : 4-61)
1
2
Ye s
Ye s
No
No
Turn the ignition switch OFF.
Measure the ECT sensor resistance.
; ECT sensor voltage: 4.5 – 5.5 V
+ B/Bl – - Ground
+ B/Bl – - B/Br
z 09900-25008: Multi circuit tester
u Tester knob indication: Voltage ( - )
( )
Loose or poor contacts on
the ECM coupler.
Open or short circuit in the
B/Bl wire or B/Br wire.
; ECT sensor resistance: 2.3 – 2.6 kΩ at 20˚C (68˚F)
(Terminal - Terminal)
z 09900-25008: Multi circuit tester
t Tester knob indication: Resistance (Ω)
Replace the ECT sensor
with a new one.
Replace the ECM with a new
one, and inspect it again.
Turn the ignition switch OFF.
Check the ECT sensor coupler for loose or poor contacts.
If OK, then measure the ECT sensor voltage at the wire
side coupler.
Disconnect the coupler and turn the ignition switch ON.
Measure the voltage between B/Bl wire terminal and
ground.
If OK, then measure the voltage between B/Bl wire termi-
nal and B/Br wire terminal.
Refer to page 5-8 for details.
Engine Coolant
Tem p.
Resistance
20˚C ( 68 ˚F) Approx. 2.45 kΩ
40˚C ( 104 ˚F) Approx. 1.148 kΩ
60˚C ( 140 ˚F) Approx. 0.587 kΩ
80˚C ( 176 ˚F) Approx. 0.322 kΩ
ECM coupler
B/Br
B/Bl
V
1
2
B/Bl or B/Br wire open or shorted to ground, or poor X or
Z connection. ( : 4-22)
If wire and connection are OK, intermittent trouble or faulty
ECM.
Recheck each terminal and wire harness for open circuit
and poor connection. ( : 4-5)

Suzuki DL1000 Specifications

General

Brand	Suzuki
Model	DL1000
Category	Motorcycle
Language	English