P1772

P1772 LOW COAST BRAKE SOLENOID VALVE

Description
^ The low coast brake solenoid valve is turned ON or OFF by the TCM in response to signals transmitted from the PNP switch, vehicle speed sensor and accelerator pedal position sensor (throttle position sensor). Gears will then be shifted to the optimum position.
^ The low coast brake solenoid valve controls the low coast brake switching valve in response to a signal transmitted from the TCM.

DTC Logic

P1772:

DTC CONFIRMATION PROCEDURE

CAUTION: Always drive vehicle at a safe speed.

NOTE: If "DTC CONFIRMATION PROCEDURE" has been previously performed, always turn ignition switch OFF. Then wait at least 10 seconds before performing the next test.

1. CHECK DTC DETECTION

With CONSULT-III
1. Start the engine.
2. Select "Data Monitor" mode for "TRANSMISSION".
3. Drive vehicle and maintain the following conditions for at least 5 consecutive seconds.
GEAR: "1" or "2" (LC/B ON/OFF)
MANU MODE SW: ON

With GST
Follow the procedure "With CONSULT-III".
Is "P1772 LC/B SOLENOID/CIRC" detected?
YES >> Go to "Diagnosis Procedure".
NO >> Check intermittent incident. Refer to GI-38, "Intermittent Incident". Service Information For Electrical Incident

Diagnosis Procedure

1. CHECK TCM POWER SUPPLY AND GROUND CIRCUIT
Check TCM power supply and ground circuit. Refer to TM-89, "Diagnosis Procedure". Main Power Supply and Ground Circuit
Is the inspection result normal?
YES >> Replace the control valve with TCM.
NO >> Repair or replace damaged parts.