5A-60 AUTOMATIC TRANSMISSIONDIAGNOSIS
DIAGNOSTIC SYSTEM Recommended T est Equipment and Procedure
The test equipment is designed to be used with the control modules in all vehicles. The components used in the transmission application are: Multi Function Tester, and
Appropriate vehicle for testing.
Multi Function Tester (MFT)
The MFT is programmed with the special vehicle diagnostic software that allows selection of the unit under test.
The program allows the proper communication to the Transmission Control Unit (TCU).
It then requests information from the user via a menu system to select the required set up.
Examples are viewing codes, clearing error codes, and real-time operation. Set up and operation instructions are detailed in the user manual.
This equipment can be used by trained personnel such as technicians and mechanics to diagnose electronic and
wiring problems relating to the vehicle transmission. Information that is available includes engine and road (shaft)
speed, transmission oil temperature, throttle position, solenoid/gear status and gear lever position. Current andstored faults detected by the electronics are also available.
TCU Pin Description The TCU pin descriptions are listed in table 6.1.1. The wiring loom pins are shown in figure 6.1.1
Pin
No. 1 2 3 4 5 6 7 8Identification
Common Ground Do not use Mode Indicator Lamp -‘ Winter ’
Gear Position ‘Park ’
LampGear Position ‘Reverse ’
LampGear Position ‘Neutral ’
LampDo not useEngine Speed Input
Sensor (-Ve) Type
GND -
OP OP OP OP
-
IP Description
Main power ground (or the module. Connects
directly to the battery negative terminal. Indicates ‘WINTER ’ mode shift schedule is se-
lected.
Drives the jewel in the instrument cluster to in-dicate ‘PARK ’ gear lever position.
Drives the jewel in the instrument cluster to in- dicate ‘REVERSE ’ gear lever position.
Drives the jewel in the instrument cluster to in- dicate ‘NEUTRAL ’ gear lever position.
Flywheel/Ring gear pulses to indicate engine speed.
4WD
(Diesel)
O O
4WD
(Gas)
O O O
Table 6.1.1 - TCU Pin Description
