1F – 123 ENGINE CONTROLS
DTC P1115 Engine Coolant Temperature (ECT) Sensor Intermittent High Voltage (Cont'd)
Step
1. Check for a poor sensor ground circuit terminal
M64 connection at the ECM.
8
2. If a problem is found, repair as necessary.
Is the repair complete?
1. Check for an intermittent open or a faulty splice in
the sensor ground circuit.
9
2. If a problem is found, repair as necessary.
Is the repair complete?
1. Using the scan tool, clear the Diagnostic Trouble
Codes (DTCs).
2. Start the engine and idle at normal operating
temperature.
10
3. Operate the vehicle within the conditions for
setting this DTC as specified in the supporting
text.
Does the scan tool indicate that this diagnostic ran
and passed?
Check if any additional DTCs are set.
11
Are any DTCs displayed that have not been diag-
nosed?
Action
Value
Yes
–
Go to Step 10
–
Go to Step 10
–
Go to Step 11
–
Go to applicable
DTC table
No
Go to Step 9
Go to "Diag-
nostic Aids"
Go to Step 2
System OK
DAEWOO T-154 BL2,3