Turbocharger Electrical System Diagnosis - Toyota 2L-T Repair Manual

TURBOCHARGER SYSTEM
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Turbocharger Electrical System Diagnosis
TC-7
TURBOCHARGER ELECTRICAL SYSTEM DIAGNOSIS
a
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Check CHARGE and
Blown Check for short circuit
ENGINE fuses
and repair a s necessary
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TROUBLESHOOTING OF TURBOCHARGER INDICATOR LIGHT AND WARNING
LIGHT OPERATION
Is charge warning
N 0
Faulty charging
light out? system
Do both green indicator light and amber warning
light light when ignition switch is turned to
ON?
I
I
L
I
l
YES
NO
Check GAUGE fuse
Check for short circuit
and repair a s necessary
YES
Faulty combination
meter
Are indicator and warning lights out during
engine idle?
I
I
I
Both lights stay on
Is charge warning
light out?
I
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Green light stays on
Faulty low pressure
switch and tachometer. switch
Amber light comes on
Check for open circuit in
Faulty high pressure
and tachometer and check for ground connection of switch.
switch
l
YES
t
Does green indicator light come on when 0.14 kg/cm2 of
(2.0 psi, 13.7 kPa) pressure is applied to both
pressure switches?
Check for short circuit in wire harness between low pressure Faulty low pressure
switch and tachometer. switch
YES
Amber light comes on
I
YES
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Faulty combination
meter
Does green indicator light come on when 0.85 kglcrn"l2.1 psi, 83 kPa) of
NO
pressure i s applied to both switches? SST 09992-00241
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Does amber indicator light come on when 0.85 kg/cm2 of
(12.1 psi, 83 kPa) pressure is applied to both switches?
NO
Faulty high pressure
switch
Check for short circuit in wire harness between high pressure
Faulty high pressure
switch and tachometer.
l y E S
,
switch
indicator light and warning light
operation okay.
I