Dct Troubleshooting Information - Honda NC700XA Service Manual

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DCT TROUBLESHOOTING INFORMATION

GENERAL TROUBLESHOOTING
Intermittent Failure
The term "intermittent failure" means a system may have had a failure, but it checks OK now. If the shift indicator "–" does not come
on, check for poor contact or loose pins at all connectors related to the circuit that you are troubleshooting. If the shift indicator "–"
was on, but then went out, the original problem may be intermittent.
Opens and Shorts
"Opens" and "Shorts" are common electrical terms. An open is a break in a wire or at a connection. A short is an accidental
connection of a wire to ground or to another wire. In simple electronics, this usually means something will not work at all. With
PCMs this can sometimes mean something works, but not the way it's supposed to.
If the shift indicator "–" has come on
Refer to DTC READOUT (page 12-12).
If the shift indicator "–" did not stay on
If the shift indicator "–" did not stay on, but there is a driveability problem, do the SYMPTOM TROUBLESHOOTING (page 12-5).
SYSTEM DESCRIPTION
SELF-DIAGNOSIS SYSTEM
The DCT system is equipped with the self-diagnostic system. When any
abnormality occurs in the DCT system, the PCM have the shift indicator [1]
blinking "–" and stores a DTC in its erasable memory for the relevant
system failure.
FAIL-SAFE FUNCTION
The DCT system is provided with a fail-safe function to secure a minimum running capability even when there is trouble in the
system.
When the PCM detects a problem in the DCT system, the PCM stops the gearshift function, and hold the gear position. Also, the
shift indicator blinks "–" to indicate the DTC.
DTC (Diagnostic Trouble Code)
• The DTC is composed of a main code and a sub code and it is displayed as a hyphenated number when retrieved from the PCM
with the HDS pocket tester.
The digits in front of the hyphen are the main code, they indicate the component of function failure.
The digits behind the hyphen are the sub code, they detail the specific symptom of the component or function failure.
For example, in the case of the shift spindle angle sensor:
– DTC 21 – 1 = (Shift spindle angle sensor voltage) – (lower than the specified value)
– DTC 21 – 2 = (Shift spindle angle sensor voltage) – (higher than the specified value)
DUAL CLUTCH TRANSMISSION (DCT) (NC700XD/SD)
[1]
12-11