A01746
CO Meter
DI--68
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DIAGNOSTICS
ENGINE (1RZ--E)
INSPECTION PROCEDURE
NOTICE:
Always use a CO meter when adjusting the idle mixture. If a CO meter is not available, DO NOT
ATTEMPT TO ADJUST IDLE MIXTURE.
1 Check CO concentration.
PREPARATION:
(a)
Warm up engine to normal operating temperature.
(b)
All accessories switched OFF.
(c)
All vacuum lines properly connected.
(d)
Transmission in ”N” position.
(e)
Connect the tachometer.
(f)
Ignition timing check correctly.
(g)
Idle speed check correctly.
(h)
Check that the CO meter is properly calibrated.
(i)
Race the engine at 2,500 rpm about 2 minutes.
CHECK:
Insert a tester probe at least 40 cm (1.3 ft) into the tailpipe.
Measure the concentration with 1 -- 3 minutes after racing the
engine to allow the the concentration to stabilize.
OK:
Idle CO concentration:
1.5
±
0.5 %
OK
CO concentration is normal.
Proceed to next circuit inspection shown
problem symptom tables
NG
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3RZ-F,3RZ-FE