DTC P172A

DTC P172A: KEY-Release Wake-up Output Circuit Malfunction

General Description

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

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

At the condition the vehicle is in OFF (LOCK) mode, the SBW shifter control module in the SBW shifter assembly turns the SRKS output to ON (12 V) when the key release switch is pressed once. The SBW shifter control module monitors the return signal of the SRKS output, and when the return signal and SRKS output does not match for a specified duration, the powertrain control module (PCM) receives malfunction from the SBW shifter control module, and stores a DTC.

Monitor Execution, Sequence, Duration, DTC Type

Execution	Continuous
Sequence	None
Duration	2 seconds or more
DTC Type	One drive cycle, MIL off, Shift position indicator off

Enable Conditions

Condition
Vehicle	ON mode

Malfunction Threshold

The return signal is abnormal for at least 2 seconds when the SRKS outputs OFF.

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.

SBW shifter control module SRKS line short to power
SBW shifter assembly internal failure
Body control module internal failure

Confirmation Procedure

Operating Condition

Turn the vehicle to the ON mode, and wait for at least 10 seconds.

With the HDS

None.

Diagnosis Details

Conditions for setting the DTC

When a malfunction is detected, a Pending DTC, a Confirmed DTC, and the freeze data are stored in the PCM memory. The MIL does not come on and the shift position indicator does not blink.

Conditions for clearing the DTC

The Pending DTC, the Confirmed DTC, and the freeze data can be cleared with the scan tool Clear command or by disconnecting the 12 volt battery.