Montero V6-3.8L SOHC (2005)
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The buzzer will sound under the following cases:
a. When the pump motor is locked (DTC 53 is set).
b. When the pump motor is energized abnormally for long period (DTC 55 is set).
c. When the accumulator pressure is abnormally low (DTC 57 is set).
d. When the solenoid valve temperature in the M-ASTC-ECU is abnormally high (DTC is not set).
TECHNICAL DESCRIPTION (COMMENT)
The cause is probably an open circuit at the buzzer circuit, a malfunction of the buzzer or a failure of buzzer drive transistor in the M-ASTC-ECU.
TROUBLESHOOTING HINTS
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Damaged wiring harness or connector
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Malfunction of the buzzer
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Malfunction of the M-ASTC-ECU
DIAGNOSIS
Required Special Tool:
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MB991223: Harness Set
STEP 1. Check the following connectors.
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Buzzer connector E-107
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M-ASTC-ECU connector E-120 Check connectors for loose, corroded or damaged terminals, or terminals pushed back in the connector.
Q: Are the connectors and terminals in good condition?
YES: Go to Step 2.
NO: Repair the faulty connector or terminal and then go to Step 7.
STEP 2. Check the buzzer circuit at M-ASTC-ECU harness connector E-120.
