Workshop Manual

6E–159
6VE1 3.5L ENGINE DRIVEABILITY AND EMISSIONS
performing the DTC P1115 Diagnostic Chart may isolate
the cause of the fault.
Test Description
Number(s) below refer to the step number(s) on the
Diagnostic Chart.
2. Verifies that the fault is present.
3. If DTC P0118 can be repeated only by duplicating
the Failure Records conditions, refer to the
“Temperature vs. Resistance Value” table. The
table may be used to test the ECT sensor at various
temperatures to evaluate the possibility of a
“shifted” sensor that may be shorted above or below
a certain temperature. If this is the case, replace
the ECT sensor. If the ECT sensor appears to be
OK, the fault is intermittent; refer to Diagnostic Aids .
Engine Coolant Temperature Sensor
°C °F OHMS
Temperature vs. Resistance Values
(approximate)
100 212 177
80 176 332
60 140 667
45 113 1188
35 95 1802
25 77 2796
15 59 4450
5 41 7280
–5 23 12300
–15 5 21450
–30 –22 52700
–40 –40 100700
DTC P0118 – ECT Sensor Circuit High Voltage
Step Action Value(s) Yes No
1 Was the “On-Board Diagnostic (OBD) System Check”
performed?
— Go to Step 2
Go to OBD
System
Check
2 1. Ignition “ON”, engine “OFF”.
2. Observe the “Eng Cool Temp” display on the Tech 2.
Is the “Eng Cool Temp” below the specified value?
–39°C
(–38°F) Go to Step 4 Go to Step 3
3 1. Ignition “ON”, engine “OFF”.
2. Review and record Tech 2 Failure Records data.
3. Operate the vehicle within Failure Records
conditions as noted.
4. Using a Tech 2, monitor the “DTC” info for DTC
P0118.
Does the Tech 2 indicate DTC P0118 failed?
—
Refer to Test
Description
Refer to
Diagnostic
Aids
4 1. Disconnect the ECT sensor electrical connector.
2. Jumper the ECT signal circuit and the sensor
ground circuit together at the ECT sensor harness
connector.
3. Observe the “Eng Cool Temp” display on the Tech 2.
Is the “Eng Cool Temp” at the specified value?
140°C
(284°F) Go to Step 6 Go to Step 5
5 1. Jumper the ECT signal circuit at the ECT sensor
harness connector to chassis ground.
2. Observe the “Eng Cool Temp” display on the Tech 2.
Is the “Eng Cool Temp” at the specified value?
140°C
(284°F)
Go to Step 7 Go to Step 8
6 Check for poor connections at the ECT sensor and
replace terminals if necessary.
Did any terminals require replacement?
— Verify repair Go to Step 10