DTC P0776: A/T Clutch Pressure Control Solenoid Valve B Stuck OFF (2013-17)

General Description 

Courtesy of HONDA, U.S.A., INC.

Courtesy of HONDA, U.S.A., INC.

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

Gear position	Shift solenoid valve	Clutch
A	B	1st	2nd	3rd	4th	5th	6th
Neutral-1st	ON	OFF	CPCD	-	-	-	-	-
1st	ON	ON	LINE	CPCA	CPCB	CPCC	-	-
1st-2nd	ON	ON	LINE	CPCA	CPCB	CPCC	-	-
2nd	ON	ON	LINE	CPCA	CPCB	CPCC	-	-
2nd-3rd	ON	ON	LINE	CPCA	CPCB	CPCC	-	-
3rd	OFF	ON	LINE	-	CPCB	CPCC	CPCA	-
3rd-4th	OFF	ON	LINE	-	CPCB	CPCC	CPCA	-
4th	OFF	OFF/(ON)	LINE	-	(CPCB)	CPCC	CPCA	CPCB
4th-5th	OFF	OFF	LINE	-	-	CPCC	CPCA	CPCB
5th	OFF	OFF/(ON)	LINE	-	(CPCB)	CPCC	CPCA	CPCB
5th-6th	OFF	OFF	LINE	-	-	CPCC	CPCA	CPCB
6th	OFF	OFF	LINE	-	-	CPCC	CPCA	CPCB

LINE : Line pressure

CPCA: A/T clutch pressure control solenoid valve A pressure

CPCB: A/T clutch pressure control solenoid valve B pressure

CPCC: A/T clutch pressure control solenoid valve C pressure

CPCD: A/T clutch pressure control solenoid valve D pressure

A/T clutch pressure control solenoid valve B is installed on the transmission housing. A/T clutch pressure control solenoid valve B is operated by the powertrain control module (PCM) and converts line pressure to A/T clutch pressure control solenoid valve B pressure. A signal from the PCM is output to A/T clutch pressure control solenoid valve B to supply proper A/T clutch pressure control solenoid valve B pressure to the correct gear clutch according to the shift schedule and the driving conditions. When the current from the PCM is high (ON), A/T clutch pressure control solenoid valve B operates and A/T clutch pressure control solenoid valve B pressure increases. When the current from the PCM is low (OFF), A/T clutch pressure control solenoid valve B turns off and A/T clutch pressure control solenoid valve B pressure decreases. The PCM monitors the input shaft (mainshaft) speed and the output shaft (countershaft) speed according to the shift status determined by the shift schedule. When an improper gear ratio is output for the shift schedule, the PCM detects an A/T clutch pressure control solenoid valve B stuck off failure and stores a DTC.

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

Execution		Continuous
Sequence		None
Duration	Symptom 1	1 second or more
	Symptom 2	4 seconds or more
	Symptom 3
DTC Type		Two drive cycles, MIL on, A/T gear position indicator blinks
OBD Status		PASSED/FAILED/NOT COMPLETED (STILL TESTING)

Enable Conditions 

Condition	Minimum	Maximum
Engine coolant temperature [ENGINE COOLANT TEMPERATURE]*		50 °F (10 °C)	-
ATF temperature [ATF TEMPERATURE]*		-4 °F (-20 °C)	-
Vehicle speed [VEHICLE SPEED]*		5 mph (9 km/h)	-
Battery voltage [BATTERY VOLTAGE]		11 V	-
Accelerator pedal position variation*		-	6 %/20 milliseconds (Not fully closed)
Shift lever position		D
No active DTCs set (prevents monitor from running)		P0122, P0123, P0222, P0223, P0705, P0716, P0717, P0718, P0721, P0722, P0723, P0746, P0747, P0751, P0752, P0756, P0757, P0761, P0762, P0777, P0796, P0797, P0842, P0843, P0847, P0848, P0872, P0873, P0877, P0878, P0962, P0963, P0966, P0967, P0970, P0971, P0973, P0974, P0976, P0977, P0979, P0980, P0989, P0990, P1658, P1659, P1683, P1684, P2101, P2118, P2122, P2123, P2127, P2128, P2135, P2138, P2176, P2714, P2720, P2721

* : Symptom 1

[ ]: HDS Parameter

Malfunction Threshold 

One of these symptoms occurs:

Symptom 1 

Symptom	Gear position commanded by the PCM	Actual gear position
1		2nd ? 3rd gear upshift	The engine speed flares when upshifting to 2nd ? 3rd gear

Symptom 2 

Symptom	Gear position commanded by the PCM	Actual gear position
2		Driving in 3rd gear	Neutral

Symptom 3 

Symptom	Gear position commanded by the PCM	Actual gear position
3		Driving in 6th gear	Neutral

Possible Cause 

NOTE:  The causes shown may not be a complete list of all potential problems, and it is possible that there may be other causes.

• A/T clutch pressure control solenoid valve B stuck off

Confirmation Procedure 

With the HDS 

None.

With the Driving Pattern 

• 1.

  Start the engine.

• 2.

  Drive the vehicle in D until the transmission shifts into 6th gear.

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

Diagnosis Details 

Conditions for setting the DTC 

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

Conditions for clearing the DTC 

The MIL is cleared if the malfunction does not return in three consecutive trips in which the diagnostic runs. The MIL, the Pending DTC, the Confirmed DTC, and the freeze data can be cleared with the scan tool Clear command or by disconnecting the battery.