Lexus SC300 / Lexus SC400. Manual — part 45
SERVICE SPECIFICATIONS
SERVICE DATA
Idle speed Magnetic clutch no engaged
Magnetic clutch engaged
Magnetic clutch clearance
Approx. 700 rpm
Approx. 700 rpm
0.5
±
0.15 mm 0.020
±
0.006 in.
TORQUE SPECIFICATIONS
Part tightened
N
⋅
m
kgf
⋅
cm
ft
⋅
lbf
Suction hose X Compressor
25
250
18
Discharge hose X Compressor
25
250
18
Compressor X Engine
Bolt
49
500
36
Nut
29
300
22
Liquid tube X Receiver
10
55
7
Liquid tube X Condenser
10
100
7
Discharge tube X Condenser
10
100
7
Expansion valve X Evaporator
5.4
55
48 in.
⋅
lbf
Suction tube X A/C Unit
10
100
7
Liquid tube X A/C Unit
10
100
7
Equalizer tube X EPR
25
250
18
Pressure switch X Liquid tube
10
100
7
–
AIR CONDITIONING SYSTEM
Service Specifications
AC–139
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Diag. Code 14
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Open in Squib Circuit
DIAGNOSTIC CHART
DIAGNOSTIC CHART
The squib circuit consists of the center airbag sensor assembly, spiral cable and the steering wheel pad
(squib). It causes the airbag to deploy when the airbag deployment conditions are satisfied.
For details of the function of each component, see FUNCTION OF COMPONENTS on page
.
Diagnostic code 14 is recorded when an open is detected in the squib circuit.
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Code No.
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Diagnosis
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14
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Open circuit in D+ wire harness or D wire harness of squib.
Squib malfunction.
Spiral cable malfunction.
Center airbag sensor assembly malfunction.
AB–62
–
SRS AIRBAG
Troubleshooting
Preperation.
Check squib circuit.
Check spiral cable.
Check harness between center airbag
sensor assembly and spiral cable.
Check center airbag sensor assembly.
Check squib.
From the results of the above inspection, the
malfunctioning part can now be considered
normal. To make sure of this, use the simula-
tion method to check.
Go to step
Repair or replace spiral cable.
Repair or replace harness or con-
nector between center airbag sen-
sor assembly and spiral cable.
Replace center airbag
sensor assembly
Replace steering wheel pad.
WIRING DIAGRAM
DIAGNOSTIC CHART
DIAGNOSTIC CHART
–
SRS AIRBAG
Troubleshooting
AB–63
INSPECTION PROCEDURE
(1) Disconnect battery negative (–) terminal cable,
and wait at least 20 seconds.
(2) Remove steering wheel pad
(See page
Measure resistance between D+ and D– on spiral
cable side of connector between spiral cable and
steering wheel pad.
Preparation.
Resistance: Below 1
When storing steering wheel pad, keep upper sur-
face fo the pad facing upward.
Disconnect center airbag sensor assembly connec-
tor.
Check squib circuit.
Go to step
AB–64
–
SRS AIRBAG
Troubleshooting
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