Downloaded from www.Manualslib.com manuals search engine 1A-76 Engine General Information and Diagnosis:
DTC P0116: Engine Coolant Temperature Circuit Range / PerformanceS7RS0B1104026
Wiring Diagram
DTC Detecting Condition and Trouble Area8
Ground circuit check
1) Remove ECM from its br acket with ECM connectors
connected.
2) Measure resistance between “C37-55” terminal of ECM connector and vehicle body ground.
Is resistance below 5
Ω? “GRY/BLU” wire and/or
“ORN” wire is open
circuit or high resistance
circuit. Poor “C37-55”
connection.
Faulty ECM ground
circuit. If circuit is OK,
substitute a known-
good ECM and recheck.
9 IAT sensor for performance check
1) Check IAT sensor according to “MAF and IAT Sensor
Inspection in Section 1C”.
Is it in good condition? Substitute a known-
good ECM and recheck.
Replace MAF and IAT
sensor.
Step Action Yes No
C37-55ORNORN
3
1
2
5V
C37-24LT GRN
E23
C37
34
1819
567
1011
17
20
47 46
495051
2122
52 16
25 9
24
14
29
55
57 54 53
59
60 58 2
262728
15
30
56 48 32 31
34353637
40
42 39 38
44
45 43 41 331
1213
238
34
1819
567
1011
17
20
47 46
495051
2122
52 16
25 9
24
14
29
55
57 54 53
59
60 58 2
262728
15
30
56 4832 31
34353637
40
42 39 38
44
45 43 41 331
1213
238
I4RS0A110025-01
1. ECT sensor
2. ECM3. To other sensors
DTC detecting condition Trouble area
ECT sensor values is less than –5 °C, 23 °F while engine is
running under more than specified engine load (more than 1000
rpm) for 2 to 1116 min (depending on ECT at engine start)
continuously from engine start.
(*2 driving cycle detecting logi c, monitoring once per driving
cycle) • ECT sensor
• ECT sensor circuit
•Thermostat
•ECM
