Toyota Corolla (E120) 2002–2008 Repair Manual / Lighting / Headlamp dimmer switch assy
Toyota Corolla (E120): Headlamp dimmer switch assy
Replacement
1. Remove steering column cover lwr

- Remove 3 screws and steering column cover lwr.
2. Remove headlamp dimmer switch assy

- Disconnect the connector.
- release the claw and pull out the head light dimmer switch assy.
Other materials:
Circuit description
If the engine coolant temperature (ect) does not reach 75°c (167°f) despite
sufficient warm – up time has
elapsed.
Dtc no
Dtc detection condition
Trouble area
P0128
Condition (a), (b) and (c):
cold start
after engine is warmed up
& ...
Malfunction in speedometer
Wiring diagram
Inspection procedure
1 Check combination meter assy
Remove the combination meter assy with connector still
connected.
check voltage.
Jack up either of the front wheels.
Shift the shift lever to neutral.
Turn the ignition switch to on ...
System description
The ecm uses signals from the vehicle speed sensor and crankshaft position
sensor to detect the actual
gear position (1st, 2nd, 3rd or o/d gear).
Then the ecm compares the actual gear with the shift schedule in the ecm memory
to detect the mechanical
trouble of the shift solenoid valves, th ...


