Acura RL. Instruction — page 38

Fig. 106: ATF Temperature Sensor Circuit Diagram

General Description

The ATF temperature sensor is a thermistor type sensor whose resistance changes according to the change in
ATF temperature. The powertrain control module (PCM) sends a 5 V reference voltage to the grounded
sensor through a pull-up resistor. When the ATF temperature is low, the sensor resistance increases and the
PCM detects a high signal voltage. As the ATF temperature rises, the sensor resistance decreases and the
PCM detects a low signal voltage.

When the ATF temperature sensor signal voltage to the PCM is above the specification, indicating that the
temperature is under the specification (open), a malfunction is detected and a DTC is stored.

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

MONITOR DESCRIPTION CHART

Enable Conditions

ENABLE CONDITIONS

Malfunction Threshold

The ATF temperature sensor output voltage is 4.93 V or more for at least 10 seconds.

Driving Pattern

Start the engine, shift to the P position, and wait for at least 10 seconds.

Diagnosis Details

Execution

Continuous

Sequence

None

Duration

10 seconds or more

DTC Type

One drive cycle, MIL OFF, D indicator blinks

OBD Status

PASSED/FAILED/NOT COMPLETED (STILL TESTING)

Condition

Minimum

Maximum

Battery voltage

11.0 V

No active DTCs

P0711, P0712

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2007 ENGINE PERFORMANCE Advanced Diagnostics — RL

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Conditions for illuminating the indicator

When a malfunction is detected, the D indicator blinks, and the DTC and the freeze frame data are stored in
the PCM memory. The MIL does not come on.

Conditions for clearing the DTC

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

DTC P0716 (15): ADVANCED DIAGNOSTICS

DTC P0716: PROBLEM IN INPUT SHAFT (MAINSHAFT) SPEED SENSOR CIRCUIT

Fig. 107: Input Shaft Speed Sensor Circuit Diagram

Fig. 108: Vehicle Speed Graph

General Description

The input shaft (mainshaft) speed sensor is attached to the outside of the transmission housing. The input
shaft (mainshaft) speed sensor generates a pulsing signal according to the speed of the input shaft
(mainshaft) idler gear on the input shaft (mainshaft). Using that signal, the powertrain control module
(PCM) determines the speed of the input shaft (mainshaft). If no pulses occur with the input shaft

2007 Acura RL

2007 ENGINE PERFORMANCE Advanced Diagnostics — RL

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Friday, June 05, 2009 2:32:04 PM

Page 150 © 2005 Mitchell Repair Information Company, LLC.

(mainshaft) rotating, the PCM detects a malfunction that may be caused by an open, a temporary open, or a
short to ground. Based on the velocity ratio measured by the output shaft (countershaft) speed sensor and the
input shaft (mainshaft) speed sensor, a malfunction is detected and a DTC is stored.

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

MONITOR DESCRIPTION CHART

Enable Conditions

ENABLE CONDITIONS

Malfunction Threshold

The vehicle speed measured by the input shaft (mainshaft) speed sensor/(divided by) the vehicle speed
measured by the output shaft (countershaft) speed sensor is less than 0.156 for at least 10 seconds.

Driving Pattern

Start the engine, and drive the vehicle at a speed of 13 mph (20 km/h) or more for at least 10 seconds.

Drive the vehicle in this manner only if the traffic regulations and ambient conditions allow.

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

Execution

Continuous

Sequence

None

Duration

10 seconds or more

DTC Type

One drive cycle, MIL ON, D indicator blinks

OBD Status

PASSED/FAILED/NOT COMPLETED (STILL TESTING)

Condition

Minimum

Maximum

Battery
voltage

11.0 V

Engine speed

500 rpm

Vehicle speed 13 mph (20 km/h)

Shift lever
position

D, D3

No active
DTCs

P0705, P0706, P0717, P0721, P0722, P0962, P0963, P0966, P0967, P0970, P0971,
P0973, P0974, P0976, P0977, P0979, P0980, P0982, P0983

Others

Not during shifting
Not when the shift lever is being shifted
No electrical noise in the output shaft (countershaft) speed sensor output circuit
Except 1st gear

2007 Acura RL

2007 ENGINE PERFORMANCE Advanced Diagnostics — RL

me

Friday, June 05, 2009 2:32:04 PM

Page 151 © 2005 Mitchell Repair Information Company, LLC.

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 P0717 (15): ADVANCED DIAGNOSTICS

DTC P0717: PROBLEM IN INPUT SHAFT (MAINSHAFT) SPEED SENSOR CIRCUIT (NO
SIGNAL INPUT)

Fig. 109: Input Shaft Speed Sensor Circuit Diagram

Fig. 110: Vehicle Speed Graph

General Description

The input shaft (mainshaft) speed sensor is attached to the outside of the transmission housing. The input
shaft (mainshaft) speed sensor generates a pulsing signal according to the speed of the input shaft
(mainshaft) idler gear on the input shaft (mainshaft). Using that signal, the powertrain control module
(PCM) determines the speed of the input shaft (mainshaft). If no pulses occur with the input shaft
(mainshaft) rotating, the PCM detects a malfunction that may be caused by an open, a temporary open, or a
short to ground. Based on the correlation between the vehicle speed measured by the output shaft

2007 Acura RL

2007 ENGINE PERFORMANCE Advanced Diagnostics — RL

me

Friday, June 05, 2009 2:32:04 PM

Page 152 © 2005 Mitchell Repair Information Company, LLC.

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