Alarm and Indication System
T-28
DTC 18 Illumination light signal On/Off/ of ignition switch keyhole
Combination instrument connectors
Harness side connector
(Viewed from the harness side)
XMET18W017
Diagnostic program
Check Display State Measures
Wait for 2s after
the DTC 18
chosen.
Illumination light signal of
ignition switch keyhole on and
off for three times.
The illumination light signal of
ignition switch keyhole is normal.
Other than the above cases. Measure the voltage of combination
instrument terminal 3A.
Is the voltage equal to B+?
l If this value is satisfied,
replace the combination
instrument
l If this value is unsatisfied,
check the following parts
— Illumination light signal
of ignition switch
keyhole.
— Harness (Battery-
illumination light signal
of ignition switch
keyhole- combination
instrument)
DTC 20 Working signal to the switch signal of rear windshield defroster relay.
Combination instrument connectors
Harness side connector
(Viewed from the harness side)
XMET18W017