Dtc P0116: Engine Coolant Temperature Circuit Range / Performance - Suzuki SX4 Service Manual

1A-80 Engine General Information and Diagnosis:
Step
8 Ground circuit check
1) Remove ECM from its bracket with ECM connectors
connected.
2) Measure resistance between "C01-55" terminal of ECM
connector and vehicle body ground.
Is resistance below 5
9 IAT sensor for performance check
1) Check IAT sensor according to "Intake Air Temperature
(IAT) Sensor Inspection in Section 1C".
Is it in good condition?

DTC P0116: Engine Coolant Temperature Circuit Range / Performance

Wiring Diagram
15 14 13 12 11
30 29 28 27 26
44
45 43 42 41
60 59 58 57 56
1. ECT sensor
DTC Detecting Condition and Trouble Area
ECT sensor values is less than temperature at A/F feedback start while engine is running
under more than specified engine load (more than 1000 rpm) for specified time
(depending on ECT at engine start (ex. 5 min at –10 °C, –4 °F)) continuously from engine
start.
(2 driving cycle detecting logic)
Action
Ω
?
1
LT GRN
GRY/BLU
3
E01
10 9 8 7 6 5 4 3
25 24 23 22 21 20 19 18
40 39 38 37 36 35 34 33
55 54 53 52 51 50 49 48
2. ECM
DTC detecting condition
"GRY/BLU" wire is open
circuit or high resistance
circuit. Poor "C01-55"
connection.
Substitute a known-
good ECM and recheck.
C01-24
C01-55
GRY/BLU
2 1 15 14 13 12 11
17 16 30 29 28 27 26
44
32 31 45 43 42 41
47 46 60 59 58 57 56
Yes
Faulty ECM ground
circuit. If circuit is OK,
substitute a known-
good ECM and recheck.
Replace MAF and IAT
sensor.
5V
2
C01
10 9 8 7 6 5 4 3
25 24 23 22 21 20 19 18
40 39 38 37 36 35 34 33
55 54 53 52 51 50 49 48
3. To other sensors
Trouble area
• ECT sensor
• ECT sensor circuit
• Thermostat
• ECM
No
S7RW0A1104028
2 1
17 16
32 31
47 46
I6RW0D110025-01