Mazda 3 Service Manual: TCM Inspection [FS5 A EL]
NOTE:
-
The TCM terminal voltage can vary with conditions when measuring and changes due to age deterioration on the vehicle, causing false diagnosis. Therefore a comprehensive inspection of the input and output systems, and the TCM is necessary to determine where the malfunction occurs.
1. Connect the voltmeter (-) lead to body GND.
2. Measure the voltage at each terminal.
-
If any incorrect voltage is detected, inspect the related system(s), wiring harnesses and connector(s) referring to the “Inspection Item” column in the “TCM Terminal Voltage”.
TCM Terminal Voltage (Reference)
|
Terminal |
Connected to |
Test Condition |
Voltage (V) |
Inspection Item |
|
A |
— |
— |
— |
— |
|
B |
CAN module |
Because this terminal is for CAN, no valid determination of terminal voltage is possible. |
||
|
C |
— |
— |
— |
— |
|
D |
— |
— |
— |
— |
|
E |
CAN module |
Because this terminal is for CAN, no valid determination of terminal voltage is possible. |
||
|
F |
Down switch |
Selector lever down-shift position |
Below 1.0 |
|
|
Except selector lever down-shift position |
B+ |
|||
|
G |
Up switch |
Selector lever up-shift position |
Below 1.0 |
|
|
Except selector lever up-shift position |
B+ |
|||
|
H |
— |
— |
— |
— |
|
I |
AT main relay |
Ignition switch off |
Below 1.0 |
|
|
Ignition switch ON |
B+ |
|||
|
J |
Battery |
Under any condition |
B+ |
|
|
K |
M position switch |
M position |
Below 1.0 |
|
|
Except M position |
B+ |
|||
|
L |
GND |
Under any condition |
Below 1.0 |
|
|
M |
GND |
Under any condition |
Below 1.0 |
|
|
N |
— |
— |
— |
— |
|
O |
AT main relay |
Ignition switch off |
Below 1.0 |
|
|
Ignition switch ON |
B+ |
|||
|
P |
AT main relay |
Ignition switch off |
Below 1.0 |
|
|
Ignition switch ON |
B+ |
|||
|
Q |
— |
— |
— |
— |
|
R |
— |
— |
— |
— |
|
S |
Oil pressure switch |
1GR |
Below 1.0 |
|
|
2GR |
Below 1.0 |
|||
|
3GR |
Below 1.0 |
|||
|
4GR |
B+ |
|||
|
5GR |
B+ |
|||
|
T |
— |
— |
— |
— |
|
U |
TR switch |
Selector lever at P position |
4.3—4.8 |
|
|
Selector lever at R position |
3.8—4.2 |
|||
|
Selector lever at N position |
3.0—3.5 |
|||
|
Selector lever at D position |
2.2—2.7 |
|||
|
Selector lever at M position |
2.2—2.7 |
|||
|
V |
TR switch, TFT sensor |
Under any condition |
Below 1.0 |
|
|
W |
— |
— |
— |
— |
|
X |
— |
— |
— |
— |
|
Y |
Input/turbine speed sensor (-) |
(See Input/turbine speed sensor.) |
|
|
|
Z |
VSS |
(See VSS.) |
|
|
|
AA |
TFT sensor |
ATF temperature 20 °C {68 °F} |
Approx.3.3 |
|
|
ATF temperature 65 °C {149 °F} |
Approx.1.3 |
|||
|
AB |
Input/turbine speed sensor (+) |
(See Input/turbine speed sensor.) |
|
|
|
AC |
Intermediate sensor |
(See Intermediate sensor.) |
|
|
|
AD |
Pressure control solenoid A (+) |
(See Pressure control solenoid A (+).) |
|
|
|
AE |
Pressure control solenoid A (-) |
(See Pressure control solenoid A (-).) |
|
|
|
AF |
— |
— |
— |
— |
|
AG |
Shift solenoid A |
(See Shift solenoid A.) |
|
|
|
AH |
Shift solenoid D |
1GR at D position |
Below 1.0 |
|
|
2GR at D position |
Below 1.0 |
|||
|
3GR at D position |
Below 1.0 |
|||
|
4GR at D position |
B+ |
|||
|
5GR at D position |
B+ |
|||
|
AI |
Shift solenoid F |
1GR at D position |
B+ |
|
|
2GR at D position |
B+ |
|||
|
3GR at D position |
B+ |
|||
|
4GR at D position |
B+ |
|||
|
5GR at D position |
Below 1.0 |
|||
|
AJ |
Shift solenoid B |
(See Shift solenoid B.) |
|
|
|
AK |
Shift solenoid E |
TCC released |
Below 1.0 |
|
|
TCC engaged |
B+ |
|||
|
AL |
Shift solenoid C |
(See Shift solenoid C.) |
|
|
|
AM |
Pressure control solenoid B |
(See Pressure control solenoid B.) |
|
|
Input/Output Wave From (Reference)
Shift solenoid A
-
TCM terminals
-
AG (+)—body GND (-)
-
Oscilloscope setting
-
5 V/DIV (Y), 5 ms/DIV (X), DC range
-
Test Condition
-
The following conditions are met:
-
Selector lever position: D position
-
Gear position: 4GR
Shift solenoid B
-
TCM terminals
-
AJ (+)—body GND (-)
-
Oscilloscope setting
-
5 V/DIV (Y), 5 ms/DIV (X), DC range
-
Test Condition
-
The following conditions are met:
-
Selector lever position: D position
-
Gear position: 1GR
Shift solenoid C
-
TCM terminals
-
AL (+)—body GND (-)
-
Oscilloscope setting
-
5 V/DIV (Y), 5 ms/DIV (X), DC range
-
Test Condition
-
The following conditions are met:
-
Selector lever position: D position
-
Gear position: 1GR
Pressure control solenoid B
-
TCM terminals
-
AM (+)—body GND (-)
-
Oscilloscope setting
-
5 V/DIV (Y), 5 ms/DIV (X), DC range
-
Test Condition
-
Shifting from 4GR to 5GR or from 5GR to 4GR
Pressure control solenoid A (+)
-
TCM terminals
-
AD (+)—body GND (-)
-
Oscilloscope setting
-
5 V/DIV (Y), 1 ms/DIV (X), DC range
-
Test Condition
-
The following conditions are met:
-
Switch the ignition to ON (engine off)
-
Selector lever position: P position
-
Accelerator pedal fully depressed
Pressure control solenoid A (-)
-
TCM terminals
-
AE (+)—body GND (-)
-
Oscilloscope setting
-
200 mV/DIV (Y), 1 ms/DIV (X), DC range
-
Test Condition
-
The following conditions are met:
-
Switch the ignition to ON (engine off)
-
Selector lever position: P position
-
Accelerator pedal fully depressed
Input/turbine speed sensor
-
TCM terminals
-
AB (+)—Y (-)
-
Oscilloscope setting
-
1 V/DIV (Y), 2 ms/DIV (X), DC range
-
Test Condition
-
Idle at P position after warm-up
Intermediate sensor
-
TCM terminals
-
AC (+)—body GND (-)
-
Oscilloscope setting
-
1 V/DIV (Y), 200 µs/DIV (X), DC range
-
Test Condition
-
The following conditions are met:
-
Gear position: 3GR
-
Vehicle speed: 30 km/h {19 mph}
VSS
-
TCM terminals
-
Z (+)—body GND (-)
-
Oscilloscope setting
-
1 V/DIV (Y), 2 ms/DIV (X), DC range
-
Test Condition
-
The following conditions are met:
-
Gear position: 3GR
-
Vehicle speed: 30 km/h {19 mph}
TCM Configuration [Fw6 A EL]
NOTE:
The TCM is built into the control valve body.
1. Verify TCM configuration implementation necessity for replacement parts.
Replacement part
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