TCU Signal Fault
Trouble Code and Symptom
P0700
TCU Signal Fault
Diagnosis Procedures
Check ECU wiring
Wiring Problem?
NO
Check wiring and insulation
Wiring Problem?
NO
Check CAN communication
(between High and Low: 120 Ω)
Communication problem
continues
NO
Repair completed
DIAGNOSIS
DI ENG SM - 2004.4
Trouble Code
YES
Repair or
replace
YES
Repair wiring
YES
Repair or
replace
(Replace TCU)
DI10-173
Symptom
CHANGED BY
EFFECTIVE DATE
AFFECTED VIN