Dtc Symptom Description - Vehicle Diagnostic Information; Dtc Symptom Categories - Suzuki XL7 2007 Service Manual

0A-27 General Information:

DTC Symptom Description - Vehicle Diagnostic Information

A DTC symptom is a 2-digit number which adds additional detail to a DTC. The DTC symptom provides additional
information without requiring a large increase in the number of new DTCs.

DTC Symptom Categories

The DTC symptom is made up of 2 alphanumeric digits. The first digit following the DTC indicates the DTC symptom
category. There are 16 possible categories available in the range of 0 through the letter F. Currently there are 8
categories in use, 0 through 7. These 8 categories together with their definitions are given below.
Category
Number
0 General Electrical Failures
1 Additional General Electrical Failures
FM/PWM (Frequency/Pulse Width
2
Modulated) Failures
3 ECU Internal Failures
4 ECU Programming Failures
5 Algorithm Based Failures
6 Mechanical Failures
7 Bus Signal/Message Failures
8-F Reserved by Document
Category Name Category Description
This category includes standard wiring failure modes, direct
current quantities related by Ohm's Law and quantities
related to amplitude, frequency or rate of change, and wave
shape.
This category includes the overflow from the previous
category.
This category includes faults related to frequency modulated
and pulse width modulated inputs and outputs of the
electronic control module (ECU). This category also includes
faults where position is determined by counts.
This category includes faults related to memory, software,
and internal electrical circuitry; requiring ECU replacement.
This category includes faults related to operational software,
calibrations, and options, remedied by programming the
ECU.
This category includes faults based on comparing two or
more input parameters for plausibility or comparing a single
parameter to itself with respect to time.
This category includes faults detected by inappropriate
motion in response to an ECU controlled output.
This category includes faults related to bus hardware and
signal integrity. This category is also used when the physical
input for a signal is located in one ECU and another ECU
diagnoses the circuit.
Not in use at this time.