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Symptom Possible cause Repair order
When outside is dark, neither tail
lamp nor headlamp turn on by auto
light operation.
1. 7.5A fuse
2. Lighting switch “AUTO” check
3. Lighting switch circuit check
4. Lighting switch ground circuit
check
5. Auto light sensor check
6. Auto light sensor circuit check
1. Check 7.5A fuse [NO. 11 located in fuse block (J/B)].
Verify battery positive voltage is present at terminal
27 of smart entrance control unit.
2. Check lighting switch (AUTO) input signal with
“CONSULT-II” in “DATA MONITOR” mode.
When lighting switch is in AUTO:
AUTO LIGHT SWITCH ON
When lighting switch is in OFF:
AUTO LIGHT SWITCH OFF
3. Check harness for open or short between smart
entrance control unit and lighting switch.
4. Check harness for lighting switch and ground.
5. Check auto light sensor input signal.
(With CONSULT-II)
See “AUTO LIGHT SENSOR” in DATA MONITOR
mode. When auto light sensor in stuck by light:
More than 3V
When auto light sensor is not stuck by light:
Approx. 0.5V
(Without CONSULT-II)
Check voltage between smart entrance control unit
terminal 7 and ground. Refer to smart entrance con-
trol unit. (EL-378)
6. Check the following.
a. Harness for open or short between smart entrance
control unit terminal 8 and auto light sensor terminal
1
b. Harness for open or short between smart entrance
control unit terminal 7 and auto light sensor terminal
2
c. Harness for open or short between smart entrance
control unit terminals 9 and 3
When outside is dark, tail lamp
turns on but headlamp does not
turn on by auto light operation.
Auto light output check Check auto light output.
(With CONSULT-II)
See “HEADLAMP” and “TAIL LAMP” in ACTIVE TEST
mode, and headlamp switch to AUTO position.
Headlamp and tail lamp should turn on.
(Without CONSULT-II)
Check voltage between smart entrance control unit ter-
minals 19, 21, 57, 59 and ground. Refer to smart
entrance control unit. (EL-378)
When outside is dark, headlamp
turns on but tail lamp does not turn
on by auto light operation.
Auto light output check Check auto light output.
(With CONSULT-II)
See “HEADLAMP” and “TAIL LAMP” in ACTIVE TEST
mode, and headlamp switch to AUTO position.
Headlamp and tail lamp should turn on.
(Without CONSULT-II)
Check voltage between smart entrance control unit ter-
minals 19, 21, 57, 59 and ground. Refer to smart
entrance control unit. (EL-378)
Light does not turn off when igni-
tion key switch is turned to “OFF”
(exterior battery saver control is
canceled).
1. 7.5A fuse
2. IGN switch circuit
1. Check 7.5A fuse [NO. 11 located in fuse block (J/B)].
Verify battery positive voltage is present at terminal
27 of smart entrance control unit.
2. Check harness for open or short between smart
entrance control unit and fuse.
HEADLAMP (FOR USA)
Trouble Diagnoses (Cont’d)
EL-42
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