Suzuki Wagon R Manual page 759

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7B-48 AUTOMATIC TRANSMISSION (4 A / T)
INSPECTION OF TCM AND ITS CIRCUITS
TCM and its circuits can be checked at TCM wiring couplers by
measuring voltage and resistance.
CAUTION:
TCM cannot be checked by itself, it is strictly prohibited to
connect voltmeter or ohmmeter to TCM with coupler dis-
connected from it.
Voltage Check
1) Remove TCM from vehicle referring to TRANSMISSION CON-
TROL MODULE REMOVAL.
2) Connect TCM couplers to TCM.
3) Check voltage at each terminal of couplers connected.
NOTE:
As each terminal voltage is affected by the battery voltage,
confirm that it is 11 V or more when ignition switch is ON.
1. TCM
2. Couplers
3. Body ground
Terminal arrangement of TCM coupler (Viewed from harness side)

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