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DTC P1760: SHIFT SOLENOID SLT circuit malfunction
Circuit Description
Throttle pressure applied to primary regulator valve, which
modulates line pressure, causes shift solenoid SLT to precisely and
minutely modulate and generate line pressure according to accelerator
pedal effort, or engine power output detected. This reduces line
pressure and provides smooth transaxle shifts. Upon receiving throttle
valve opening angle signal, ECM controls line pressure by sending a
predetermined duty cycle to shift solenoid SLT, modulating line
pressure and generating throttle pressure. Duty cycle is ratio of
period of continuity in one cycle. Shift solenoid SLT is located on
transaxle valve body. See Fig. 3. DTC will set if voltage at ECM
terminal SLT- is zero volts or 12 volts for one second or more.
Possible causes are
*Open or short in solenoid circuit.
*Solenoid malfunction.
*ECM malfunction.
Diagnosis & Repair Procedure
1) Raise and support vehicle. Remove transaxle oil pan.
Disconnect shift solenoid SLT connector. See Fig. 3. Using a DVOM,
measure resistance between solenoid terminals. If resistance is 5.0-5.
6 ohms, go to next step. If resistance is not 5.0-5.6 ohms, replace
solenoid.
2) Connect positive lead with 8-10 watt bulb from battery to
terminal No. 1 (Orange wire) of solenoid. Connect negative lead to
terminal No. 2 of solenoid. With power supplied to solenoid, ensure
solenoid valve moves outward. With power disconnected, ensure solenoid
valve moves inward.
3) If solenoid does not operate as described, replace
solenoid. If solenoid operates as described, check and repair wiring
harness or connector between solenoid and ECM. If wiring harness and
connector are okay, replace ECM.