Acura RL. Manual - part 52

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 P0776 (77): ADVANCED DIAGNOSTICS

DTC P0776: A/T CLUTCH PRESSURE CONTROL SOLENOID VALVE B STUCK OFF

Fig. 161: A/T Clutch Pressure Control Solenoid Valve B - Operation Diagram

Fig. 162: 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

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

Fig. 163: Shift Solenoid Valve Output (D Position)

General Description

A/T clutch pressure control solenoid valve B is installed in the transmission housing. A/T clutch pressure
control solenoid valve B is operated by the powertrain control module (PCM) and converts modulated
pressure to A/T clutch pressure control solenoid B pressure, which operates CPC valve B. Line pressure is
modulated to clutch pressure control B pressure (CPC B pressure) by CPC valve B and the CPC valve B
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 low
(OFF), A/T clutch pressure control solenoid valve B operates and the CPC valve B pressure increases. When
the current from the PCM is high (ON), A/T clutch pressure control solenoid valve B turns off and the CPC
valve B 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 change mode, an A/T clutch pressure control solenoid valve B
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

20 seconds

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 (8 km/h)

Shift lever position

D
P0122, P0123, P0705, P0716, P0717, P0718, P0721, P0722,
P0723, P0746, P0747, P0751, P0752, P0756, P0757, P0761,

2007 Acura RL

2007 ENGINE PERFORMANCE Advanced Diagnostics - RL

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

Malfunction Threshold

The transmission is held in 3rd gear against the 3rd --> 4th gear upshift command for as long as 20 seconds,
with records that the gear change time was short when the 2nd --> 3rd gear upshift was commanded.

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 P0777 (77): ADVANCED DIAGNOSTICS

DTC P0777: A/T CLUTCH PRESSURE CONTROL SOLENOID VALVE B STUCK ON

Fig. 164: A/T Clutch Pressure Control Solenoid Valve B - Operation Diagram

No active DTCs

P0762, P0766, P0767, 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

2007 Acura RL

2007 ENGINE PERFORMANCE Advanced Diagnostics - RL

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

Fig. 165: Gear Position VS Shift Status Graph

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

Fig. 166: Shift Solenoid Valve Output (D Position)

General Description

A/T clutch pressure control solenoid valve B is installed in the transmission housing. A/T clutch pressure
control solenoid B is operated by the powertrain control module (PCM) and converts modulated pressure to
A/T clutch pressure control solenoid B pressure, which operates CPC valve B. Line pressure is modulated to
clutch pressure control B pressure (CPC B pressure) by CPC valve B and the CPC valve B 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 low (OFF), A/T clutch
pressure control solenoid valve B operates and the CPC valve B pressure increases. When the current from
the PCM is high (ON), A/T clutch pressure control solenoid valve B turns off and the CPC valve B 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 change mode, an A/T clutch pressure control solenoid valve B ON failure is detected
and a DTC is stored.

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

2007 Acura RL

2007 ENGINE PERFORMANCE Advanced Diagnostics - RL

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

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