DESCRIPTION
This engine uses a No. 2 engine coolant temperature sensor and an intake air temperature sensor to detect temperatures related to engine operation. A thermistor, whose resistance value varies according to the temperature, is built into each sensor. When the temperature becomes low, the resistance of the thermistor increases. When the temperature becomes high, the resistance decreases. These variations in resistance are transmitted to the ECM as voltage changes.
DTC No. | Detection Item | DTC Detection Condition | Trouble Area | MIL | Memory | Note |
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P00B162 | Radiator Coolant Temperature Sensor Signal Compare Failure | All of the following conditions are met (2 trip detection logic):
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| Comes on | DTC stored | SAE Code: P00B2 |
MONITOR DESCRIPTION
The ECM monitors the difference between the No. 2 engine coolant temperature and the intake air temperature when the engine is started cold to accurately detect the engine temperature conditions. The monitor runs when the engine is started after 7 hours or more have elapsed since the power switch was turned off in the previous trip. If the difference between the engine coolant temperature and the intake air temperature on a cold start exceeds 25°C (45°F), the ECM interprets this as a malfunction in the No. 2 engine coolant temperature sensor circuit or intake air temperature sensor circuit, illuminates the MIL and stores this DTC.
MONITOR STRATEGY
Related DTCs | P00B2: No. 2 engine coolant temperature sensor rationality |
Required Sensors/Components (Main) | No. 2 engine coolant temperature sensor Intake air temperature sensor |
Required Sensors/Components (Related) | - |
Frequency of Operation | Once per driving cycle |
Duration | 15 seconds |
MIL Operation | 2 driving cycles |
Sequence of Operation | None |
TYPICAL ENABLING CONDITIONS
All of the following conditions are met | - |
Soak time | 7 hours or more |
Auxiliary battery voltage | 10.5 V or higher |
Time after engine start | Less than 20 seconds |
Intake air temperature at hybrid system ready-to-drive | -10°C (14°F) or higher |
Intake air temperature sensor circuit fail (P0112, P0113) | Not detected |
No. 2 engine coolant temperature sensor circuit fail (P00B3, P00B4) | Not detected |
Soak timer fail (P2610) | Not detected |
TYPICAL MALFUNCTION THRESHOLDS
Deviated No. 2 engine coolant temperature and intake air temperature | Less than -25°C (-45°F), or higher than 25°C (45°F) |
CONFIRMATION DRIVING PATTERN
HINT:
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Click here
Click here
HINT:
Techstream Display | Description |
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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 / NOTICE / HINT
NOTICE:
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(Select Powertrain in Health Check and then check the time stamp data.)
Click here
Click here
HINT:
Read Freeze Frame Data using the Techstream. The ECM records vehicle and driving condition information as Freeze Frame Data the moment a DTC is stored. When troubleshooting, Freeze Frame Data can help determine if the vehicle was moving or stationary, if the engine was warmed up or not, if the air fuel ratio was lean or rich, and other data from the time the malfunction occurred.
PROCEDURE
1. | CHECK ANY OTHER DTCS OUTPUT (IN ADDITION TO DTC P00B162) |
(a) Connect the Techstream to the DLC3.
(b) Turn the power switch on (IG).
(c) Turn the Techstream on.
(d) Enter the following menus: Powertrain / Engine / Trouble Codes.
(e) Read the DTCs and record the Freeze Frame Data.
Powertrain > Engine > Trouble Codes Result | Proceed to |
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DTC P00B162 is output | A |
DTC P00B162 and other DTCs are output | B |
HINT:
If any DTCs other than P00B162 are output, troubleshoot those DTCs first.
B | GO TO DTC CHART |
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2. | CHECK FREEZE FRAME DATA (COOLANT TEMPERATURE AND RADIATOR COOLANT TEMPERATURE) |
(a) Connect the Techstream to the DLC3.
(b) Turn the power switch on (IG).
(c) Turn the Techstream on.
(d) Using the Techstream, read the values displayed in the freeze frame data recorded in step 1.
Powertrain > Engine > DTC(P00B162) > Freeze Frame Data Tester Display |
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Coolant Temperature |
Radiator Coolant Temperature |
(e) Read the value displayed on the Techstream.
Standard:
Difference between the Coolant Temperature and the Radiator Coolant Temperature is within 15°C (27°F).
HINT:
When the engine is cold, the value of the intake air temperature, ECM internal temperature and ambient temperature should be approximately the same.
NG | REPLACE NO. 2 ENGINE COOLANT TEMPERATURE SENSOR |
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3. | CHECK FREEZE FRAME DATA (COOLANT TEMPERATURE AND INTAKE AIR TEMPERATURE) |
(a) Connect the Techstream to the DLC3.
(b) Turn the power switch on (IG).
(c) Turn the Techstream on.
(d) Using the Techstream, read the values displayed in the Freeze Frame Data recorded in step 1.
Powertrain > Engine > DTC(P00B162) > Freeze Frame Data Tester Display |
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Coolant Temperature |
Intake Air Temperature |
(e) Read the value displayed on the Techstream.
Standard:
Difference between the Coolant Temperature and the Intake Air Temperature is within 15°C (27°F).
HINT:
Click here
OK | REPLACE ECM |
NG | REPLACE ENGINE COOLANT TEMPERATURE SENSOR |