Nissan Altima 2007-2012 Service Manual: P0128 thermostat function
DTC Logic
DTC DETECTION LOGIC
NOTE: If DTC P0128 is displayed with DTC P0300, P0301, P0302, P0303 or P0304, first perform the trouble diagnosis for DTC P0300, P0301, P0302, P0303, P0304. Refer to EC-271, "DTC Logic".
Engine coolant temperature has not risen enough to open the thermostat even though the engine has run long enough.
This is due to a leak in the seal or the thermostat stuck open.
DTC CONFIRMATION PROCEDURE
1.PRECONDITIONING
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: • For best results, perform at ambient temperature of –10°C (14°F) or higher.
• For best results, perform at engine coolant temperature of –10°C (14°F) to 52°C (126°F).
• Before performing the following procedure, do not fill with the fuel.
>> GO TO 2.
2.PERFORM DTC CONFIRMATION PROCEDURE
1. Turn A/C switch OFF.
2. Turn blower fan switch OFF.
3. Turn ignition switch ON.
4. Select “COOLAN TEMP/S” in “DATA MONITOR” mode with CONSULT-III.
5. Check the indication of “COOLAN TEMP/S” If it is below 52°C (126°F), go to following step.
If it is above 52°C (126°F), cool down the engine to less than 52°C (126°F). Then go to next steps.
6. Start engine and drive vehicle for 10 consecutive minutes under the following conditions.
If “COOLAN TEMP/S” increases to more than 71°C (160°F) within 10 minutes, turn ignition switch OFF because the test result will be OK.
7. Check 1st trip DTC.
Follow the procedure “With CONSULT-III” above.
Is 1st trip DTC detected? YES >> Go to EC-197, "Diagnosis Procedure".
NO >> INSPECTION END
Diagnosis Procedure
1.CHECK ENGINE COOLANT TEMPERATURE SENSOR
Refer to EC-198, "Component Inspection".
Is the inspection result normal? YES >> GO TO 2.
NO >> Replace engine coolant temperature sensor.
2.CHECK THERMOSTAT
Refer to CO-21, "Removal and Installation".
Is the inspection result normal? YES >> INSPECTION END
NO >> Replace thermostat.
Component Inspection
1.CHECK ENGINE COOLANT TEMPERATURE SENSOR
1. Turn ignition switch OFF.
2. Disconnect engine coolant temperature sensor harness connector.
3. Remove engine coolant temperature sensor.
4. Check resistance between engine coolant temperature sensor terminals as follows.
Is the inspection result normal? YES >> INSPECTION END
NO >> Replace engine coolant temperature sensor.
P0127 IAT sensor
Description
The intake air temperature sensor is built-into mass air flow sensor
(1). The sensor detects intake air temperature and transmits a signal
to the ECM.
The temperature sensing unit u ...
P0130 A/F sensor 1
Description
The air fuel ratio (A/F) sensor 1 is a planar one-cell limit current sensor.
The sensor element of the A/F sensor 1 is composed an electrode
layer, which transports ions. It has a hea ...
Other materials:
Cylinder head
Removal and Installation
1. Cylinder head
2. Cylinder head gasket
3. Cylinder head bolt
A. Follow installation procedure
REMOVAL
1. Remove the engine and transaxle assembly. Refer to EM-72, "Removal and
Installation".
2. Remove the timing chain. Refer to EM-52, "Removal ...
CVT fluid
Inspection
CHECKING CVT FLUID
Fluid level should be checked with the fluid warmed up to 50° to 80°C (122°
to 176°F). The fluid level check
procedure is as follows:
1. Check for fluid leakage.
2. With the engine warmed up, drive the vehicle in an urban area.
When ambient temperature ...
Front wiper and washer system
System Diagram
System Description
OUTLINE
The front wiper is controlled by each function of BCM and IPDM E/R.
Control by BCM
• Combination switch reading function
• Front wiper control function
Control by IPDM E/R
• Front wiper control function
• Relay control function
FRONT WIP ...