Montero V6-3.8L SOHC (2005)
CAUTION: First of all, check the parking brake switch circuit and the brake fluid level switch circuit.
NOTE: This diagnosis procedure is limited to cases where communication with the scan tool is possible (M-ASTC-ECU power supply is normal) and
no DTC sets.
CIRCUIT OPERATION
When the power transistor in the M-ASTC-ECU is off or the circuit between the M-ASTC-ECU and the combination meter is open, the power
transistor in the combination meter will turn on to illuminate the brake warning light.
TECHNICAL DESCRIPTION (COMMENT)
The cause is probably the M-ASTC-ECU malfunction or open circuit at the M-ASTC-ECU's brake warning light drive circuit.
TROUBLESHOOTING HINTS
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Damaged wiring harness or connector