Toyota Camry Manual page 1503

DI–476
DTC P1765
CIRCUIT DESCRIPTION
0
Electric Current (A)
(*) Duty Ratio
The duty ratio is the ratio of the period of continuity in one cycle.
For example, if A is the period of continuity in one cycle, and B is the period of non–continuity, then
DTC No.
After the engine is warmed up, the current flow to the shift
solenoid valve SLN for 1 sec or more under condition (a) or
P1765 (b):
(a) Engine speed: 500 rpm or more
(b) Park/neutral position switch: ON (P or N position)
Reference
Waveform between terminals SLN
–
and SLN when engine is idling.
GND
1 msec./div.
DIAGNOSTICS
Linear Solenoid for Accumulator Pressure Control
Circuit Malfunction (Shift Solenoid Valve SLN)
The shift solenoid valve SLN controls the hydraulic pressure
acting on the accumulator control valve when gears are shifted
and performs smooth gear shifting.
The ECM determines optimum operating pressure according to
the signals from the throttle position sensor, vehicle speed sen-
sor and direct clutch speed sensor and controls the volume of
current flow to the solenoid valve.
The amount of current to the solenoid is controlled by the (*)
duty ratio of ECM output signals, causing a momentary change
to the hydraulic pressure acting on the clutches during gear
shifting.
When the duty ratio is high, the hydraulic pressure acting on the
1 clutches is low.
AT5608
DTC Detecting Condition
+
5 V/div.
– AUTOMATIC TRANSAXLE (A541E)
D Open or short in shift solenoid valve SLN circuit
D Shift solenoid valve SLN
D ECM
Waveform between terminals SLN
–
and SLN when during shift change.
GND
Author :
Trouble Area
+
5 V/div.
1 msec./div.
Date :
DI02Q–02
D00060
D00062
711