5A–40
BRAKE CONTROL SYSTEM
B05RS005
The DTC 12 is displayed repeatedly. (display is
discontinued after about 5 minutes after)
Chart B-1 With the key in the ON position (Before starting the engine). Warning light (W/L)
is not activated.
Step
Action
Yes No
1 Is W/L fuse disconnected? Replace fuse.
Go to Step 5
Go to Step 2
2 Is W/L burnt out? Replace W/L
bulb.
Go to Step 5
Go to Step 3
3 1. Turn the key off.
2. Disconnect coil integrated module connector (C-4).
3. Turn the key ON.
Is the check voltage between coil integrated module connector
(C-4) terminals 6 and 7 than battery voltage?
Go to Step 4
Repair harness
and connector.
Go to Step 5
4 Is the check continuity coil integrated module connector (C-4)
terminals, 1 and 7 and body ground.
Check harness
for suspected
disconnection
No fault found:
Replace EHCU.
Go to Step 5
Repair harness
and connector.
Go to Step 5
5 Reconnect all components, ensure all components are properly
mounted.
Was this step finished?
Repeat the “Basic
diagnostic flow
chart”
Go to Step 5
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