BE/Body Electrical System — Inspection of parking brake switch circuit., page 74

H  Inspection of parking brake switch circuit.

Turn ignition switch off.

ALTERNATOR

INSPECT ALTERNATOR OPERATION
Is alternator operation normal?
(See page CH-4)

No → Replace alternator.

Yes ↓

BRAKE FLUID LEVEL WARNING SWITCH

INSPECT GROND CONNECTION
Disconnect connector from brake fluid level warning switch. Is there continuity between terminal 2 of wire harness connector and body ground?

No → • Open circuit in wire harness between terminal 2 and body ground.
       • Body ground faulty.

Yes ↓

INSPECT BRAKE WARNING SWITCH
Is brake fluid level warning switch operation normal?
(See page BE-43)

No → Replace brake warning switch.

Yes ↓

Connect the connector to brake warning switch.

PARKING BRAKE SWITCH

INSPECT PARKING BRAKE SWITCH OPERATION
Disconnect connector from parking brake switch.
Is parking brake switch operation normal?
(See page BE-82)

No → Replace parking brake switch.

Yes ↓

Connect connector to parking brake switch.

COMPUTER

Disconnect connector from computer and inspect connector on wire harness side as follows.

Remove CHARGE fuse and ignition switch turned on.

Is there no voltage between terminal 12 and body ground with parking brake pulled up?

No → Open circuit in wire harness between terminal 12 of computer and terminal 1 of parking brake switch.

Yes ↓

Is there battery voltage between terminal 12 and body ground with parking brake released?

No → Short circuit in wire harness between terminal 12 of computer and terminal 1 of parking brake switch, terminal 1 of brake fluid level warning switch or terminal 2 of alternator.

Yes ↓

Replace computer.