7A-68 AUTOMATIC TRANSMISSION (AW30-40LE)
TCM VOLTAGE CHECK
TCM voltage check is done to check for transmission and
transmission control module (TCM) problems which cannot
be detected by self-diagnosis.
Additionally, it serves as a back-up check for self-
diagnosis.
Measure the voltage drop and make a continuity test for
each of the sensors, solenoids, and switches.
If the voltage is within the specified range and continuity
exists, that particular area of the TCM and automatic
transmission assembly is normal.
If voltage deviation or lack of continuity is discovered,
disconnect the applicable parts and check each of them
individually.
This will allow you to determine the trouble location (TCM,
automatic transmission unit, or another area of the
vehicle).
826L100005
Inspection Tool
Use a circuit tester to measure voltage and circuit
continuity.
Insert the test probes from the connector wiring side. TCM
terminals are extremely small.
Wrap a piece of thin wire around the probe of tester.
This will make measurement easier.
NOTE:
TCM is located in the behind instrument panel of the
driver’s compartment.
TCM Voltage Check Procedure
1. Remove the TCM.
2. Turn the ignition switch on. Do not start the engine.
3. Measure the voltage at the terminal.
Refer the following table for the specified voltage
ranges.