Acura RL. Instruction — page 50

Fig. 153: Shift Solenoid Valve C — Operation Diagram

Fig. 154: Gear Position VS Shift Status Graph

2007 Acura RL

2007 ENGINE PERFORMANCE Advanced Diagnostics — RL

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

Page 197 © 2005 Mitchell Repair Information Company, LLC.

Fig. 155: Shift Solenoid Valve Driving Signal Combination Table

General Description

Shift solenoid valve C is installed in the transmission housing. It is controlled by the ON/OFF signal from
the powertrain control module (PCM) to apply line pressure to shift valve C. The signal from the PCM is
output to apply clutch pressure control pressure to the proper gear change clutch according to the gear
change schedule. When the signal to shift solenoid valve C from the PCM is ON, and line pressure is
discharged, shift valve C is inactive. When the signal to shift solenoid valve C from the PCM is OFF, and
line pressure is applied to shift valve C, it operates against the shift valve C spring. 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, a
shift solenoid valve C ON 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 or less

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)

Shift lever position

D

2007 Acura RL

2007 ENGINE PERFORMANCE Advanced Diagnostics — RL

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

Page 198 © 2005 Mitchell Repair Information Company, LLC.

Malfunction Threshold

The transmission is held in 3rd gear against the 3rd —> 4th gear upshift command for as long as 20 seconds,
without 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 P0766 (73): ADVANCED DIAGNOSTICS

DTC P0766: SHIFT SOLENOID VALVE D STUCK OFF

No active DTCs

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

2007 Acura RL

2007 ENGINE PERFORMANCE Advanced Diagnostics — RL

me

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

Page 199 © 2005 Mitchell Repair Information Company, LLC.

Fig. 156: Shift Solenoid Valve D — Operation Diagram

Fig. 157: Gear Position VS Shift Status Graph

2007 Acura RL

2007 ENGINE PERFORMANCE Advanced Diagnostics — RL

me

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

Page 200 © 2005 Mitchell Repair Information Company, LLC.

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