Loading ...
Loading ...
Loading ...
On Board Diagnosis Logic
NFEC1289
Engine coolant temperature has not risen enough to open the ther-
mostat even though the engine has run long enough.
This is due to a leak in the seal or the thermostat open stuck.
DTC No.
Trouble diagnosis
name
DTC Detecting Condition Possible Cause
P0128
0128
Thermostat function The engine coolant temperature does not reach to
specified temperature even though the engine has
run long enough.
I Thermostat malfunction
I Leakage from sealing portion of ther-
mostat
I Engine coolant temperature sensor
DTC Confirmation Procedure
NFEC1291
NOTE:
If “DTC Confirmation Procedure” has been previously conducted,
always turn ignition switch “OFF” and wait at least 10 seconds
before conducting the next test.
TESTING CONDITION:
I For best results, perform at ambient temperature of –10°C
(14°F) or higher.
I For best results, perform at engine coolant temperature of
–10°C (14°F) to 60°C (140°F).
WITH CONSULT-II
NFEC1291S01
1) Replace thermostat with new one. Refer to LC-18, “Thermo-
stat”. Use only a genuine NISSAN thermostat as a replace-
ment. If an incorrect thermostat is used, the MILmay come on.
2) Turn ignition switch “ON”.
3) Select “COOLAN TEMP/S” in “DATA MONITOR” mode with
CONSULT-II.
4) Check that the “COOLAN TEMP/S” is above 60°C (140°F).
If it is below 60°C (140°F), go to following step.
If it is above 60°C (140°F), stop engine and cool down the
engine to less than 60°C (140°F), then retry from step 1.
5) Drive vehicle for 10 consecutive minutes under the following
conditions.
VHCL SPEED SE 80 - 120 km/h (50 - 75 MPH)
If 1st trip DTC is detected, go to “Diagnostic Procedure”,
EC-219.
WITH GST
NFEC1291S02
1) Follow the prodedure “WITH CONSULT-II” above.
DTC P0128 THERMOSTAT FUNCTION
On Board Diagnosis Logic
EC-218
Loading ...
Loading ...
Loading ...