TM-90
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P1772 LOW COAST BRAKE SOLENOID
P1772 LOW COAST BRAKE SOLENOID
Description
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Low coast brake solenoid valve is turned “ON” or “OFF” by the TCM in response to signals sent from the trans-
mission range switch, output speed sensor and accelerator pedal position sensor. Gears will then be shifted to
the optimum position.
CONSULT-III Reference Value in Data Monitor Mode
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On Board Diagnosis Logic
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• This is an OBD-II self-diagnostic item.
• Diagnostic trouble code “P1772 L C BRAKE SOLENOID” with CONSULT-III is detected when TCM detects
an improper voltage drop when it tries to operate the solenoid valve.
Possible Cause
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• Harness or connectors
(The solenoid circuit is open or shorted.)
• Low coast brake solenoid valve
DTC Confirmation Procedure
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NOTE:
If “DTC Confirmation Procedure” has been previously performed, always turn ignition switch “OFF”
and wait at least 10 seconds before performing the next test.
After the repair, perform the following procedure to confirm the malfunction is eliminated.
WITH CONSULT-III
1. Turn ignition switch “ON”. (Do not start engine.)
2. Select “DATA MONITOR” mode for “ENGINE” with CONSULT-III.
3. Start engine.
4. Drive vehicle and maintain the following conditions for at least 5 consecutive seconds.
SLCT LVR POSI: “1” or “2”
GEAR: “1st” or “2nd” (LC/B ON/OFF)
5. If DTC is detected, go to
TM-90, "Diagnosis Procedure"
.
WITH GST
Follow the procedure “With CONSULT-III”.
Diagnosis Procedure
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1.
CHECK INPUT SIGNAL
With CONSULT-III
1. Turn ignition switch “ON”.
2. Select “SELECTION FROM MENU” in “DATA MONITOR” mode for “TRANSMISSION” with CONSULT-III.
3. Start the engine.
4. Read out the value of “ON OFF SOL” while driving.
OK or NG
OK
>> GO TO 4.
Item name
Condition
Display value
ON OFF SOL
Low coast brake engaged. Refer to
TM-9
.
ON
Low coast brake disengaged. Refer to
TM-9
.
OFF
Item name
Condition
Display value
ON OFF SOL
Low coast brake engaged. Refer to
TM-9
.
ON
Low coast brake disengaged. Refer to
TM-9
.
OFF