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T
A
2A
+
T-56
WARNING SYSTEM
9TGOTX-084
Vacuum warning lamp
Vacuum warning lamp comes ON with buzzer after engine
started
Connect vacuum gauge be-
tween vacuum pump and
vacuum tank
Start engine
Check vacuum
• Specified vacuum
-440 mmHg
I NO.
Check vacuum pump
(-17.32 inHg)I1;500 rpm
(Refer to Section P)
.-580 mmHg
Vacuum leakage from
(-22.83 inHg)/3,OOO rpm
vacuum hose
max -700 mmHg
(-27.56 inHg) or more
YES
1. Disconnect vacuum switch
connector
2. Check that lamp goes
~
OFF and buzzer stops
Vacuum switch malfunction
• Goes OFF and buzzer
stops
NO
Short-circuit in wire harness
(Vacuum switch-Instrument
cluster)
Vacuum warning lamp comes ON without buzzer after engine
started
Check continuity between 2A
terminal at instrument cluster
H
and buzzer A terminal as
Instrument cluster malfunction
shown in the figure
• Continuity
YES
Check buzzer operation
H
(Refer to page T-61)
Buzzer malfunction
• Normal
YES
Short-circuit in instrument
cluster
I
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Table of Contents
Troubleshooting
