Acura RL. Manual - part 83

Enable Conditions 

ENABLE CONDITIONS 

Malfunction Threshold 

Either condition must be met for at least 0.7 seconds. 



The registration of the throttle valve fully closed position is not completed within a predetermined 
time after the ignition switch is turned ON.  



The registered value of the throttle valve fully closed position is 0.74 V

*1

 , 1.61 V

*2

 or more, or 0.49 

V

*1

 , 1.37 V

*2

 or less.  

*1: TP sensor A 

*2: TP sensor B 

Diagnosis Details 

Conditions for illuminating the MIL 

When a malfunction is detected, the MIL comes on and the DTC and the freeze frame data are stored in the 
PCM memory. 

Conditions for clearing the MIL 

The MIL will be cleared if the malfunction does not recur during three consecutive trips in which the 
diagnostic runs. 

The MIL, the DTC, and the freeze frame data can be cleared by using the scan tool Clear command or by 
disconnecting the battery. 

DTC P2183 (192): ADVANCED DIAGNOSTICS 

DTC P2183: ENGINE COOLANT TEMPERATURE (ECT) SENSOR 2 CIRCUIT 
RANGE/PERFORMANCE PROBLEM 

Duration

0.7 seconds or more

DTC Type

One drive cycle, MIL ON

OBD Status

N/A

Condition

Minimum

Maximum

Battery voltage

6.0 V

-

Ignition switch

ON

No active DTCs

P0122, P0123, P0222, P0223, P2101, P2108, P2118, P2135, U0107

Other

Engine is stopped and ignition switch is not in the ON position

 

2007 Acura RL 

2007 ENGINE PERFORMANCE Advanced Diagnostics - RL

  

me 

 

Friday, June 05, 2009 2:32:07 PM

Page 329  © 2005 Mitchell Repair Information Company, LLC. 

Fig. 267: Engine Coolant Temperature Sensor 2 Circuit Performance Graph 

General Description 

Two engine coolant temperature sensors and one intake air temperature sensor are used by the powertrain 
control module (PCM). 

When the engine is stopped and enough time has passed, the temperature of the engine will equal the 
ambient temperature. When an inappropriate temperature is detected after comparing the temperature 
readings of each sensor, a malfunction in the corresponding sensor is detected and a DTC is stored. 

Monitor Execution, Sequence, Duration, DTC Type, OBD Status 

MONITOR DESCRIPTION CHART 

Enable Conditions 

ENABLE CONDITIONS 

Execution

Once per driving cycle

Sequence

None

Duration

10 seconds or more

DTC Type

Two drive cycles, MIL ON

OBD Status

N/A

Condition

Minimum

Maximum

Engine off time 6 hours

-

No active DTCs P0111, P0112, P0113, P0116, P0117, P0118, P0125, P1116, P2184, P2185, P2610

 

2007 Acura RL 

2007 ENGINE PERFORMANCE Advanced Diagnostics - RL

  

me 

 

Friday, June 05, 2009 2:32:07 PM

Page 330  © 2005 Mitchell Repair Information Company, LLC. 

Malfunction Threshold 

A malfunction is detected if these three conditions are not present after the engine and the ignition switch 
have been off for at least 6 hours before restarting the engine. 



The temperature (IAT minus ECT1) is not 57°F (32°C) or less.  



The temperature (IAT minus ECT2) is not 28°F (16°C) or less.  



The temperature (ECT2 minus ECT1) is not 45°F (25°C) or less.  

Driving Pattern 

1. Turn the ignition off, and wait at least 6 hours.  

2. Start the engine, and let it idle for at least 10 seconds.  

Diagnosis Details 

Conditions for illuminating the MIL 

When a malfunction is detected during the first drive cycle, a Temporary DTC is stored in the PCM 
memory. If the malfunction recurs during the next (second) drive cycle, the MIL comes on and the DTC and 
the freeze frame data are stored. 

Conditions for clearing the MIL 

The MIL will be cleared if the malfunction does not recur during three consecutive trips in which the 
diagnostic runs. 

The MIL, the DTC, the Temporary DTC, and the freeze frame data can be cleared by using the scan tool 
Clear command or by disconnecting the battery. 

DTC P2184 (192): ADVANCED DIAGNOSTICS 

DTC P2184: ENGINE COOLANT TEMPERATURE (ECT) SENSOR 2 CIRCUIT LOW VOLTAGE

Fig. 268: Engine Coolant Temperature Sensor 2 (Low Voltage) - Circuit Diagram 

 

2007 Acura RL 

2007 ENGINE PERFORMANCE Advanced Diagnostics - RL

  

me 

 

Friday, June 05, 2009 2:32:07 PM

Page 331  © 2005 Mitchell Repair Information Company, LLC. 

Fig. 269: Engine Coolant Temperature Sensor 2 Output Voltage Graph 

General Description 

Engine coolant temperature (ECT) sensor 2 is a thermistor attached to the radiator side of the coolant 
manifold. The powertrain control module (PCM) applies voltage (about 5 V) to the ECT2 signal circuit 
through a pull-up resistor. As the engine coolant temperature cools, ECT sensor 2 resistance increases, and 
the PCM detects a high signal voltage. As the engine coolant warms, sensor resistance decreases, and the 
PCM detects a low ECT2 signal voltage. 

If the ECT sensor 2 output voltage is less than a set value when the engine coolant temperature is high, the 
PCM detects a malfunction and a DTC is stored. 

Monitor Execution, Sequence, Duration, DTC Type, OBD Status 

MONITOR DESCRIPTION CHART 

Enable Conditions 

ENABLE CONDITIONS 

Malfunction Threshold 

The output voltage from the ECT sensor 2 is 0.08 V or less for at least 2 seconds. 

Diagnosis Details 

Execution

Continuous

Sequence

None

Duration

2 seconds or more

DTC Type

One drive cycle, MIL ON

OBD Status

N/A

Condition

 

Ignition switch

ON

No active DTCs

P2185

 

2007 Acura RL 

2007 ENGINE PERFORMANCE Advanced Diagnostics - RL

  

me 

 

Friday, June 05, 2009 2:32:07 PM

Page 332  © 2005 Mitchell Repair Information Company, LLC.