MEMORY FUNCTION [SJ6A-EL]

id050208100400

• The memory function stores malfunction information detected in the malfunction detection function. Once malfunction information is stored, the memory will not be cleared even when the ignition switch is turned off (LOCK position) or the malfunction is repaired.

• The stored memory (malfunction information) can be cleared using the Mazda Modular Diagnostic System (M-MDS), or by disconnecting the negative battery cable.

Sending Freeze Frame Data

• The freeze frame data consists of data for vehicle and transmission control system operation conditions when malfunctions in the transmission control system are detected and stored in the TCM.

• There are modes 2 and 12 in the freeze frame data.

Freeze frame data (mode 2)

• Freeze frame data is stored at the instant the malfunction indicator lamp illuminates, and only a part of the DTC data is stored.

• For the freeze frame data, if there are several malfunctions in the engine control system, the data for the malfunction which occurred initially is stored. Thereafter, if a misfire or fuel injection control malfunction occurs, data from the misfire or fuel injection control malfunction is written over the initially stored data. However, if the initially stored freeze frame data is a misfire or fuel injection control malfunction, it is not overwritten.

Freeze frame data (mode 12)

• The data for DTCs currently detected is stored.

• The DTC recording timing differs depending on the number of DTC drive cycles.

― For a DTC with a drive cycle number 1, only the malfunction determination data is recorded.

― For a DTC with a drive cycle number 2, both the malfunction determination and undetermined data is recorded.

Freeze frame data table (mode2, mode12) table

Freeze frame data item

Definition

Unit

Corresponding PID data monitor item

Description

LOAD

Engine load

%

—

Ratio of current intake air amount to wide-open throttle engine operation intake air amount

ECT

Engine coolant temperature

°C

ECT TCM

Engine coolant temperature

RPM

Engine speed

Rpm

RPM TCM

Engine speed

VS

Vehicle speed

KPH

VSS

Vehicle speed input from ABS/DSC HU/CM

TP

Throttle valve position No.1

%

THOP

TP sensor No.1 value

RUNTM

Time from engine start

hh:mm:ss

—

Time from engine start

VPWR

Module supply voltage

V

VPWR_TCM

PCM power supply voltage

Freeze frame data item	Definition	Unit	Corresponding PID data monitor item	Description
LOAD	Engine load	%	—	Ratio of current intake air amount to wide-open throttle engine operation intake air amount
ECT	Engine coolant temperature	°C	ECT TCM	Engine coolant temperature
RPM	Engine speed	Rpm	RPM TCM	Engine speed
VS	Vehicle speed	KPH	VSS	Vehicle speed input from ABS/DSC HU/CM
TP	Throttle valve position No.1	%	THOP	TP sensor No.1 value
RUNTM	Time from engine start	hh:mm:ss	—	Time from engine start
VPWR	Module supply voltage	V	VPWR_TCM	PCM power supply voltage