DESCRIPTION
Refer to DTC P011511.
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DTC No. | Detection Item | DTC Detection Condition | Trouble Area | MIL | Memory | Note |
---|---|---|---|---|---|---|
P01152A | Engine Coolant Temperature Sensor 1 Signal Stuck in Range | Either of the following conditions is met (2 trip detection logic):
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| Comes on | DTC stored | SAE Code: P0116 |
MONITOR DESCRIPTION
Engine Coolant Temperature Sensor Cold Start MonitorWhen a cold engine start is performed and then the engine is warmed up, if the engine coolant temperature sensor value does not change, it is determined that a malfunction has occurred. If this is detected in 2 consecutive driving cycles, the MIL is illuminated and this DTC is stored.
Engine Coolant Temperature Sensor Soak MonitorIf the engine coolant temperature sensor value does not change after the warmed up engine is stopped and then the next cold engine start is performed, it is determined that a malfunction has occurred. If this is detected in 2 consecutive driving cycles, the MIL is illuminated and this DTC is stored.
MONITOR STRATEGY
Related DTCs | P0116: Engine coolant temperature sensor rationality (cold start monitor) P0116: Engine coolant temperature sensor rationality (soak monitor) |
Required Sensors/Components (Main) | Engine coolant temperature sensor |
Required Sensors/Components (Related) | - |
Frequency of Operation | Once per driving cycle |
Duration | 10 seconds: Soak monitor -: Cold start monitor |
MIL Operation | 2 driving cycles |
Sequence of Operation | None |
TYPICAL ENABLING CONDITIONS
All Monitor runs whenever the following DTCs are not stored | None |
All of the following conditions are met | - |
Battery voltage | 10.5 V or higher |
Time after engine start | 1 second or more |
Engine coolant temperature at engine start | Less than 60°C (140°F) |
Soak time | 0 second or more |
Accumulated mass air flow | 7738 g or more |
Engine | Running |
Fuel cut | Off |
Intake air temperature sensor circuit fail (P0112, P0113) | Not detected |
Engine coolant temperature sensor circuit fail (P0117, P0118) | Not detected |
Difference between engine coolant temperature at engine start and intake air temperature (for mass air flow meter sub-assembly) | Less than 40°C (72°F) |
All of the following conditions are met | - |
Battery voltage | 10.5 V or higher |
Last trip condition | Engine running |
Soak time | 5 hours or more |
Either of the following conditions is met | 1 or 2 |
1. Engine coolant temperature | 60°C (140°F) or higher |
2. Accumulated mass air flow | 15476 g or more |
Intake air temperature sensor circuit fail (P0112, P0113) | Not detected |
Engine coolant temperature sensor circuit fail (P0117, P0118) | Not detected |
Soak timer fail (P2610) | Not detected |
TYPICAL MALFUNCTION THRESHOLDS
Cold Start Monitor Engine coolant temperature sensor value change | Less than 5°C (9°F) |
Difference between current engine coolant temperature sensor value and previous engine coolant temperature sensor value when engine stopped | Less than 5°C (9°F) (Varies with engine coolant temperature of last trip engine stop) |
CONFIRMATION DRIVING PATTERN
HINT:
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HINT:
If the engine coolant temperature does not change by 5°C (9°F) or higher, the engine coolant temperature sensor is malfunctioning. It is not necessary to continue this procedure.
HINT:
Techstream Display | Description |
---|---|
NORMAL |
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ABNORMAL |
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INCOMPLETE |
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HINT:
The normal judgment procedure is used to complete DTC judgment and also used when clearing permanent DTCs.
CAUTION:
When performing the confirmation driving pattern, obey all speed limits and traffic laws.
HINT:
In the event of the drive pattern being interrupted (possibly due to factors such as traffic conditions), the drive pattern can be resumed.
HINT:
The normal judgment procedure is used to complete DTC judgment and also used when clearing permanent DTCs.
CAUTION / NOTICE / HINT
HINT:
PROCEDURE
1. | CHECK ANY OTHER DTCS OUTPUT (IN ADDITION TO DTC P01152A) |
(a) Connect the Techstream to the DLC3.
(b) Turn the engine switch on (IG).
(c) Turn the Techstream on.
(d) Enter the following menus: Powertrain / Engine / Trouble Codes.
(e) Read the DTCs.
Powertrain > Engine > Trouble Codes Result | Proceed to |
---|---|
DTC P01152A is output | A |
DTC P01152A and other DTCs are output | B |
HINT:
If any DTCs other than P01152A are output, troubleshoot those DTCs first.
B | ![]() | GO TO DTC CHART |
|
2. | INSPECT WATER INLET WITH THERMOSTAT SUB-ASSEMBLY |
(a) Inspect the water inlet with thermostat sub-assembly (thermostat opening temperature).
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HINT:
Perform "Inspection After Repair" after replacing the engine coolant temperature sensor.
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OK | ![]() | REPLACE ENGINE COOLANT TEMPERATURE SENSOR |
NG | ![]() | REPLACE WATER INLET WITH THERMOSTAT SUB-ASSEMBLY |
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