Workshop Manual

6E–163
6VE1 3.5L ENGINE DRIVEABILITY AND EMISSIONS
DTC P0125 –ECT Excessive Time to Closed Loop Fuel Control (Cont'd)
Step NoYesValue(s)Action
6 Compare engine coolant temperature displayed on the
Tech 2 to the actual coolant temperature measured
with a thermometer. (Observe normal precautions
when opening the cooling system.)
Is the Tech 2 engine coolant temperature indication
close to the measured temperature?
— Go to Step 9 Go to Step 7
7 1. Ignition “OFF”.
2. Disconnect the PCM.
3. Using a DVM, measure the resistance of the ECT at
the PCM connector.
4. Compare the DVM reading with the chart in “Test
Description”.
Is the chart value approximately equal to the
thermometer reading?
— Go to Step 12 Go to Step 8
8 Check for high resistance in wiring related to the ECT
sensor. Also, check for poor connections at the ECT
sensor and the PCM.
Was a problem found?
— Go to Step 10 Go to Step 11
9 Refer to Cooling and Radiator for cooling system
diagnosis and repair condition as necessary.
Is the action complete?
— Verify repair —
10 Replace the faulty terminal(s) or repair faulty wiring as
necessary.
Is the action complete?
— Verify repair —
11 Replace the ECT sensor.
Is the action complete?
— Verify repair —
12 Replace the PCM.
IMPORTANT: The replacement PCM must be
programmed. Refer to
On-Vehicle Service in
Powertrain Control Module and Sensors for
procedures.
And also refer to latest Service Bulletin.
Check to see if the Latest software is released or not.
And then Down Load the LATEST PROGRAMMED
SOFTWARE to the replacement PCM.
Is the action complete?
— Verify repair —