Table of Contents
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Engine Coolant Temperature Sensor
C
Temperature Vs. Resistance Values (approxi-
100
80
60
45
35
25
15
5
5
15
30
40
DTC P1115 Engine Coolant Temperature (ECT) Sensor Intermittent High Voltage
Step
Perform an On-Board Diagnostic (EOBD) System
Check.
1
Is the system check complete?
1. Turn the ignition ON.
2
2. Install the scan tool.
Is DTC P0118 set?
Check the scan tool.
3
Is DTC P1121 also set?
1. Check for a poor sensor ground circuit terminal A
connection at the Engine Coolant Temperature
(ECT) sensor.
4
2. If a problem is found, repair as necessary.
Is the repair complete?
1. Check for a poor ECT signal circuit terminal B
connection at the ECT sensor.
5
2. If a problem is found, repair as necessary.
Is the repair complete?
1. Check the ECT signal circuit between the ECT
sensor connector and the
engine control module (ECM) for
6
an intermittent open.
2. If a problem is found, repair as necessary.
Is the repair complete?
1. Check the ECT signal circuit between the ECT
sensor connector and the ECM for an
intermittent short to voltage.
7
2. If a problem is found, repair as necessary.
Is the repair complete?
DAEWOO T-154 BL2,3
F
OHMS
mate)
212
177
176
332
140
667
113
1188
95
1802
77
2796
59
4450
41
7280
23
12300
5
21450
22
52700
40
100700
Action
ENGINE CONTROLS 1F – 122
Test Description
Number(s) below refer to the step number(s) on the
Diagnostic Table.
1. The On-Board Diagnostic (EOBD) System Check
prompts the technician to complete some basic
checks and store the freeze frame and failure re-
cords data on the scan tool if applicable. This
creates an electronic copy of the data taken when
the malfunction occurred. The information is then
stored on the scan tool for later reference.
Value
–
Go to Step 2
–
Go to applicable
DTC Table
–
Go to Step 8
–
Go to Step 10
–
Go to Step 10
–
Go to Step 10
–
Go to Step 10
Yes
No
Go to
"On-Board
Diagnostic
System Check"
Go to Step 3
Go to Step 4
Go to Step 5
Go to Step 6
Go to Step 7
Go to Step 8
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