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DTC P0725 Engine speed input circuit malfunction
1. ECM
3. TCM couplers (viewed from harness side)
2. TCM
4. ECM couplers (viewed from harness side)
DTC DETECTING CONDITION
• Inputted engine rev. signal too low or too high.
Step
1
Check DTC of "ENGINE DIAGNOSIS" referring
to Section 6.
Is there DTC related to engine speed sensor?
2
1) Turn ignition switch OFF and disconnect
ECM and TCM couplers.
2) Measure resistance between terminals
"E23-16" and "E12-5" of disconnected har-
ness side couplers.
Is it about 0 Ω?
3
Measure resistance between terminal "E12-5"
of disconnected harness side coupler and body
ground.
Is it infinity?
Action
AUTOMATIC TRANSMISSION (4 A/T) 7B-41
Yes
Inspect and repair refer-
ring to DTC flow table of
"ENGINE DIAGNOSIS" in
Section 6.
Go to Step 3.
Go to Step 4.
No
Go to Step 2.
"Br/Y" wire open.
"Br/Y" wire shorted to
ground.
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