Acura RL. Instruction — page 45

Enable Conditions

ENABLE CONDITIONS

Malfunction Threshold

The ratio of the engine revolutions to the transmission input pulses does not reach about 100% for at least 22
seconds.

Driving Pattern

1. Start the engine. Hold the engine speed at 3,000 rpm without load (in Park or neutral) until the

radiator fan comes on.

2. Drive the vehicle at a constant speed of 60 mph (96 km/h) for at least 22 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 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 DTC and the freeze frame data
are stored. The MIL does not come on.

Conditions for clearing 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.

Execution

Once per driving cycle

Sequence

None

Duration

22 seconds or more

DTC Type

Two drive cycles, MIL OFF, D indicator blinks

OBD Status

PASSED/FAILED/NOT COMPLETED (STILL TESTING)

Condition

Minimum

Maximum

Battery voltage

11.0 V

Engine coolant temperature

158°F (70°C)

212°F (100°C)

Shift status

5th gear in D position

Torque converter clutch

During controlling operation

No active DTCs

P0116, P0117, P0118, P0122, P0123, P0705, P0706, P0716,
P0717, P0718, P0721, P0722, P0723, P0746, P0747, P0751,
P0752, P0756, P0757, P0761, P0762, P0766, P0767, P0776,
P0777, P0796, P0797, P0962, P0963, P0966, P0967, P0970,
P0971, P0973, P0974, P0976, P0977, P0979, P0980, P0982,
P0983, P1780

Other

When both the vehicle speed and the throttle position are in Enable
Range

2007 Acura RL

2007 ENGINE PERFORMANCE Advanced Diagnostics — RL

me

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

Page 177 © 2005 Mitchell Repair Information Company, LLC.

DTC P0746 (40): ADVANCED DIAGNOSTICS

DTC P0746: A/T CLUTCH PRESSURE CONTROL SOLENOID VALVE A STUCK OFF

Fig. 132: A/T Clutch Pressure Control Solenoid Valve A — Operation Diagram

Fig. 133: Gear Position VS Shift Status Graph

Hydraulic pressure supply to the clutch by shift solenoid valve output (D position)

2007 Acura RL

2007 ENGINE PERFORMANCE Advanced Diagnostics — RL

me

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

Page 178 © 2005 Mitchell Repair Information Company, LLC.

Fig. 134: Shift Solenoid Valve Output (D Position)

General Description

A/T clutch pressure control solenoid valve A is installed in the transmission housing. A/T clutch pressure
control solenoid valve A is operated by the powertrain control module (PCM) and converts the modulated
pressure to A/T clutch pressure control solenoid A pressure, which operates CPC valve A. Line pressure is
modulated to clutch pressure control A pressure (CPC A pressure) by CPC valve A and the CPC valve A
spring. A signal from the PCM is output to the proper gear clutch, determined by the gear schedule, to
supply the proper CPC pressure according to the driving conditions. When the current from the PCM is high
(ON), A/T clutch pressure control solenoid valve A operates and the CPC valve A pressure increases. When
the current from the PCM is low (OFF), A/T clutch pressure control solenoid valve A turns off and CPC
valve A pressure decreases. The PCM monitors the input shaft (mainshaft) speed and the output shaft
(countershaft) speed at the gear change determined by the shift schedule. When an improper gear ratio is
output compared to the predetermined gear ratio, an A/T clutch pressure control solenoid valve A OFF
failure is detected and a DTC is stored.

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

MONITOR DESCRIPTION CHART

Enable Conditions

ENABLE CONDITIONS

Execution

Continuous

Sequence

None

Duration

2.0 seconds (symptom 1)
0.5 second (symptom 2-A, 2-B)

DTC Type

Two drive cycles, MIL ON, D indicator blinks

OBD Status

PASSED/FAILED/NOT COMPLETED (STILL TESTING)

Condition

Minimum

Maximum

Battery voltage

11.0 V

Engine coolant temperature

50°F (10°C)

ATF temperature

-4°F (-20°C)

Vehicle speed

5 mph (9 km/h)

Accelerator pedal position
variation

6.0 %/ 20 milliseconds

(1)

2007 Acura RL

2007 ENGINE PERFORMANCE Advanced Diagnostics — RL

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

Page 179 © 2005 Mitchell Repair Information Company, LLC.

Malfunction Threshold

One of these symptom occurs.

Drive in 3rd gear with a record that symptom 1 occurred.

Symptom 2 occurs.

MALFUNCTION THRESHOLD SYMPTOM 1

MALFUNCTION THRESHOLD SYMPTOM 2

Driving Pattern

Start the engine, and accelerate the vehicle until the transmission shifts into 5th gear in the D position.

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 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 P0747 (76): ADVANCED DIAGNOSTICS

Shift lever position

D

No active DTCs

P0122, P0123, P0705, P0716, P0717, P0718, P0721, P0722,
P0723, P0747, P0751, P0752, P0756, P0757, P0761, P0762,
P0766, P0767, P0776, P0777, P0796, P0797, P0842, P0843,
P0847, P0848, P0962, P0963, P0966, P0967, P0970, P0971,
P0973, P0974, P0976, P0977, P0979, P0980, P0982, P0983,
P1743, P1744, P1745, P1780

(1)

Symptom 2

Symptom

Gear position commanded by the PCM

Actual gear position

1

1st —> 2nd gear upshift

Held in 1st gear

Symptom

Gear position commanded by the PCM

Actual gear position

2-A

2nd —> 3rd gear upshift

The engine speed flares

2-B

3rd —> 4th gear upshift

The engine speed flares

2007 Acura RL

2007 ENGINE PERFORMANCE Advanced Diagnostics — RL

me

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

Page 180 © 2005 Mitchell Repair Information Company, LLC.

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