TROUBLE DIAGNOSES — Diagnostic Procedure 5 (SYMPTOM: Illumination or indicators of push control unit do not come on.) + Diagnostic Procedure 5-1
HA-79flowchartUnverifiedSix incident-pattern rows determine which sub-procedure (5-1 / 5-2 / 5-3 / 5-4 or replace amp) applies. △ rows specifically replace the push-control-unit control amp.
Diagnostic Procedure 5
SYMPTOM: Illumination or indicators of push control unit do not come on.
WARNING
Perform Main Power Supply and Ground Circuit Check before referring to the following flow chart.
Initial actions
- 1Turn ignition switch and lighting switch ON.
- 2Turn A/C, REC and fan switches ON.
- 3Push VENT, B/L, FOOT, F/D and DEF switches in order.
- 4Check for incidents and follow the repairing methods as shown.
Incident matrix → repair path
X
VENT○
B/L○
FOOT○
F/D○
DEF○
REC○
A/C○
How to repairGo to DIAGNOSTIC PROCEDURE 5-1
○
VENTX
B/LX
FOOTX
F/DX
DEFX
REC○
A/C○
How to repairGo to DIAGNOSTIC PROCEDURE 5-2
○
VENT○
B/L○
FOOT○
F/D○
DEF○
RECX
A/C○
How to repairGo to DIAGNOSTIC PROCEDURE 5-3
○
VENT△
B/L△
FOOT△
F/D△
DEF△
REC○
A/C○
How to repairReplace control amp. built-in push control unit
○
VENTX
B/LX
FOOTX
F/DX
DEFX
RECX
A/CX
How to repairReplace control amp. built-in push control unit
○
VENT○
B/L○
FOOT○
F/D○
DEF○
REC○
A/CX
How to repairGo to DIAGNOSTIC PROCEDURE 5-4
NOTE
Legend: ○ = illumination or indicator comes on; X = illumination or indicator does not come on; △ = some indicators for VENT, B/L, FOOT, F/D, DEF or REC come on.
DIAGNOSTIC PROCEDURE 5-1
Diagnostic Procedure 5-1 — only ILL fails
1
CHECK OTHER ILLUMINATION SYSTEMS EXCEPT FOR A/C SYSTEM. Does other illumination come on with ignition switch and lighting switch ON?
N.G.
CHECK ILLUMINATION SYSTEM. Refer to illumination/Wiring Diagram in EL section.
O.K.
2
Turn ignition switch and lighting switch OFF.
3
[A] CHECK ILLUMINATION BULB. Remove push control unit and disconnect harness connectors. Remove illumination bulb(s) and check them.
N.G.
Replace illumination bulb(s).
O.K.
4
(Go to next page.)
See also
HA-65TROUBLE DIAGNOSES — Main Power Supply and Ground Circuit Check (Power supply circuit + Thermo control amp.)HA-66TROUBLE DIAGNOSES — Main Power Supply and Ground Circuit Check (Cont'd) — Push Control Unit CheckHA-81TROUBLE DIAGNOSES — Diagnostic Procedure 5 (Cont'd) — DIAGNOSTIC PROCEDURE 5-3HA-82TROUBLE DIAGNOSES — Diagnostic Procedure 5 (Cont'd) — DIAGNOSTIC PROCEDURE 5-4EL