DESCRIPTION
Refer to DTC P0115 (See page ).
DTC No. |
DTC Detection Condition |
Trouble Area |
---|---|---|
P0125 |
The engine coolant temperature does not reach the closed loop enabling temperature for 20 minutes (this period varies with the engine coolant temperature at engine start) (2 trip detection logic). |
|
MONITOR DESCRIPTION
The resistance of the engine coolant temperature sensor varies in proportion to the actual engine coolant temperature. The ECM supplies a constant voltage to the sensor and monitors the signal output voltage of the sensor. The signal output voltage varies according to the changing resistance of the sensor. After the engine is started, the engine coolant temperature is monitored by this signal. If the engine coolant temperature sensor indicates that the engine is not yet warm enough for closed loop fuel control, despite a specified period of time having elapsed since the engine was started, the ECM interprets this as a malfunction in the sensor or cooling system and stores the DTC.
MONITOR STRATEGY
Related DTCs |
P0125: Insufficient Engine Coolant Temperature for Closed Loop Fuel Control Rationality |
Required Sensors/Components (Main) |
Engine coolant temperature sensor Thermostat Cooling system |
Required Sensors/Components (Related) |
- |
Frequency of Operation |
Continuous |
Duration |
71 seconds: Engine coolant temperature at engine start is (closed-loop engine coolant temperature - 8.33°C [46.994°F]) or higher 130 seconds: Engine coolant temperature at engine start is (closed-loop engine coolant temperature - 19.44°C [66.992°F]) or higher, and less than (closed-loop engine coolant temperature - 8.33°C [46.994°F]) 1200 seconds: Engine coolant temperature at engine start is less than (closed-loop engine coolant temperature - 19.44°C [66.992°F]) |
MIL Operation |
2 driving cycles |
Sequence of Operation |
None |
TYPICAL ENABLING CONDITIONS
Monitor runs whenever the following DTCs are not stored |
None |
Thermostat fail (P0128) |
Not detected |
Intake air temperature sensor circuit fail (P0112, P0113) |
Not detected |
Engine coolant temperature sensor circuit fail (P0115, P0117, P0118) |
Not detected |
Mass air flow meter sensor circuit fail (P0101, P0102, P0103) |
Not detected |
TYPICAL MALFUNCTION THRESHOLDS
Time until actual engine coolant temperature reaches closed loop fuel control enabling temperature |
71 seconds: Engine coolant temperature at engine start is (closed-loop engine coolant temperature - 8.33°C [46.994°F]) or higher 130 seconds: Engine coolant temperature at engine start is (closed-loop engine coolant temperature - 19.44°C [66.992°F]) or higher, and less than (closed-loop engine coolant temperature - 8.33°C [46.994°F]) 1200 seconds: Engine coolant temperature at engine start is less than (closed-loop engine coolant temperature - 19.44°C [66.992°F]) |
CONFIRMATION DRIVING PATTERN
HINT:
Techstream Display |
Description |
---|---|
NORMAL |
|
ABNORMAL |
|
INCOMPLETE |
|
N/A |
|
HINT:
HINT:
WIRING DIAGRAM
Refer to DTC P0115 (See page ).
CAUTION / NOTICE / HINT
HINT:
PROCEDURE
1. |
CHECK ANY OTHER DTCS OUTPUT (IN ADDITION TO DTC P0125) |
(a) Connect the Techstream to the DLC3.
(b) Turn the ignition switch to ON.
(c) Turn the Techstream on.
(d) Enter the following menus: Powertrain / Engine / Trouble Codes.
(e) Read the DTCs.
Result |
Proceed to |
---|---|
DTC P0125 is output |
A |
DTC P0125 and other DTCs are output |
B |
HINT:
If any DTCs other than P0125 are output, troubleshoot those DTCs first.
B | ![]() |
GO TO DTC CHART |
|
2. |
INSPECT THERMOSTAT |
(a) Inspect the thermostat (See page ).
NG | ![]() |
REPLACE THERMOSTAT |
|
3. |
CHECK COOLING SYSTEM |
(a) Check for defects in the cooling system that might cause the system to be too cold, such as abnormal cooling fan operation or any modifications.
HINT:
Perform "Inspection After Repair" after replacing the engine coolant temperature
sensor (See page ).
OK | ![]() |
REPLACE ENGINE COOLANT TEMPERATURE SENSOR |
NG | ![]() |
REPAIR OR REPLACE COOLING SYSTEM |
Removal
REMOVAL
PROCEDURE
1. REMOVE PARKING BRAKE PEDAL ASSEMBLY
HINT:
Refer to the instructions for Removal of the parking brake pedal assembly (See
page ).
2. REMOVE NO. 1 PARKING BRAKE CABLE ASSEMBLY
(a) Remove the clip.
...
System Diagram
SYSTEM DIAGRAM
Communication Table
Sender
Receiver
Signal
Communication Method
Main Body ECU (Driver Side Junction Block Assembly)
Combination Meter Assembly
Driver side door ...
Door Mirror Foot Light Circuit
DESCRIPTION
The main body ECU (driver side junction block assembly) controls the door mirror
foot lights.
WIRING DIAGRAM
1. w/o Seat Position Memory:
2. w/ Seat Position Memory:
PROCEDURE
1.
CHECK VEHICLE CONDITION
...