Maintenance Required Lamp/Indicator: Description and Operation
MAINTENANCE REMINDER SYSTEMCAUTION:
All SRS wire harnesses are covered with yellow insulation. Before you disconnect any part of an SRS wire harness, disconnect the airbag connectors.
Whenever the ignition switch is ON, or has been turned OFF for less than three minutes, be careful not to bump the SRS unit; the airbags could accidentally deploy and cause damage or injuries.
How the Circuit Works
The maintenance reminder light comes on to remind the driver that the car is due for scheduled maintenance.
The maintenance reminder unit receives a vehicle speed input from the vehicle speed sensor (VSS) and uses this information to compute the distance traveled. For the first 6000 ± 100 miles (9650 ± 160 km) after the maintenance reminder light is reset, it will come on for two seconds when you turn the ignition switch to ON (II) as a bulb check.
Between 6000 ± 100 miles (9650 ± 160 km) and 7500 ± 100 miles (12070 ± 160 km) the reminder light will come on for two seconds when you turn the ignition switch to ON (II), and then flash for eight seconds more.
Beyond 7500 ± 100 miles (12070 ± 160 km) the reminder light will stay on when the ignition switch is in the ON (II) position until the unit is reset.
NOTE:
Turn the ignition switch OFF before you remove the 5-P connector from the maintenance reminder unit, otherwise you will cancel all data in the memory.
The data will remain in the memory even when the ignition switch is turned OFF, or if the unit is disconnected. When the ignition switch is turned ON (II), and the car is driven, additional data will be stored.