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DIAGNOSTICS
AUTOMATIC TRANSAXLE
DI-197
351
Author:
Date:
2001 SIENNA (RM787U)
DTC
P1780
Park/Neutral Position Switch Malfunction
CIRCUIT DESCRIPTION
The park/neutral position switch detects the shift lever position and sends signals to the ECM.
The ECM receives signals (NSW, R, 2 and L) from the park/neutral position switch. When the signal is not
sent to the ECM from the park/neutral position switch, the ECM judges that the shift lever is in D position.
DTC No.
DTC Detection Condition
Trouble Area
P1780
When driving under conditions (a) and (b) for 30 seconds or
more, the park/neutral position switch is ON (N position).
(2-trip detection logic)
(a) Vehicle speed: 70 km/h (44 mph) or more
(b) Engine speed: 1,500 - 2,500 rpm
Short in park/neutral position switch circuit
Park/neutral position switch
ECM
DI0CZ-19
