DTC P0716

DTC P0716:  VNM Performance

General Description 

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

The dual speed sensor is integrated to the sensor unit in the transmission. The transmission control module (TCM) monitors the detected speeds of dual speed sensor (input speed), dual speed sensor (output speed), and wheel speed sensor, and the engine speed. If one of the following conditions occurs, the TCM detects a malfunction and stores a DTC:

• The relation between detected speeds of dual speed sensor (input speed) and the engine speed is abnormal.
• The relation between detected speeds of dual speed sensor (input speed) and dual speed sensor (output speed) is abnormal.
• The relation between detected speeds of dual speed sensor (input speed) and wheel speed sensor is abnormal.

Monitor Execution, Sequence, Duration, DTC Type 

Execution	Continuous
Sequence	None
Duration	1 second or more
DTC Type	One drive cycle, MIL on, A/T gear position indicator blinks

Enable Conditions 

Condition
Vehicle	During drive

Malfunction Threshold 

One of these conditions is met:

• The difference between transmission input speed [Transmission Input Speed] and engine speed [Engine Speed] is more than 250 rpm for at least 1 second.
• The difference between transmission input speed [Transmission Input Speed] and the product of transmission output speed and gear ratio is more than 250 rpm for at least 1 second.
• The difference between transmission input speed [Transmission Input Speed] and the product of wheel speed, gear ratio, and axle ratio is more than 250 rpm for at least 1 second.

[ ]: HDS Parameter

Possible Cause 

• Dual speed sensor NM line open (includes a loose or disconnected connector)
• Dual speed sensor VCC2 line open (includes a loose or disconnected connector)
• Dual speed sensor NM line short to ground
• Dual speed sensor VCC2 line short to ground
• Sensor unit failure (dual speed sensor)
• TCM internal failure

Confirmation Procedure 

Operating Condition 

• 1.

  Start the engine.

• 2.

  Drive the vehicle for a while.

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

With the HDS 

None.

Diagnosis Details 

Conditions for setting the DTC 

When a malfunction is detected, the A/T gear position indicator blinks, the MIL comes on, and a Pending DTC, a Confirmed DTC, and the freeze data are stored in the TCM memory.

Conditions for clearing the DTC 

The A/T gear position indicator comes off by turning the vehicle to the OFF (LOCK) mode. 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.