Suzuki Wagon R Manual page 747

7B-36 AUTOMATIC TRANSMISSION (4 A / T)
DTC 31 – A /T VEHICLE SPEED SENSOR (A / T VSS)
(INPUT VOLTAGE TOO HIGH OR TOO LOW)
STEP
1 1) Turn ignition switch OFF and disconnect A/T
VSS – input rev. sensor coupler.
2) Measure resistance between terminals of
disconnected sensor side coupler.
(See figure below.)
Is it 160 – 200 Ω?
2 1) Connect A/T VSS coupler then disconnect TCM
couplers.
2) Measure resistance between terminal "B11" and
"B3" of disconnected harness side coupler.
(See figure below.)
Is it 160 – 200 Ω?
3 1) Turn ignition switch OFF and disconnect A/T
VSS – input rev. sensor coupler.
2) Measure resistance between terminal "3"
(of disconnected sensor side coupler) –
body ground then terminal "4" (of disconnected
sensor side coupler) – body ground.
(See figure below.)
Is it about 0 Ω?
ACTION YES
Go to Step 2. Replace A/T VSS.
Go to Step 3. Broken "W" or "B" wire or
shorted to each other.
Replace A/T Go to Step 4.
VSS.
1. A / T VSS
2. Coupler
3. Shield wire
4. TCM coupler
(viewed from harness side)
NO