7B-34 AUTOMATIC TRANSMISSION (4 A/T)
DTC P0720 Output shaft speed sensor circuit malfunction
1. Output shaft speed sensor (A/T VSS) 4. TCM
2. Coupler 5. TCM couplers (viewed from harness side)
3. Shield wire
DTC DETECTING CONDITION
• Output shaft speed sensor signal voltage too high or too low.
Step Action Yes No
1 1) Turn ignition switch OFF and disconnect
output shaft speed sensor – input shaft
speed sensor coupler. (See figure.)
2) Measure the resistance between terminals
of disconnected sensor side coupler.
Is it 160 – 200 Ω?
(See figure.)
Go to Step 2. Replace output shaft
speed sensor.
2 1) Connect output shaft speed sensor – input
shaft speed sensor coupler then disconnect
TCM couplers.
2) Measure resistance between terminal “E12-
6” and “E12-14” of disconnected harness
side coupler.
Is it 160 – 200 Ω?
(See figure.)
Go to Step 3. “W” or “B” wire open or
shorted each other.
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