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Table 1, Diagnostic Plug
ALDL and Voltage Supply, Check
If no communication can be
established between the airbag control unit and TECH 1, trouble-shooting
should be carried out according to the following table.
When checking is concluded,
continue with section 4.1
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· Ignition
ON
· Measure
voltage:
from: battery positive terminal
to: battery negative terminal
· Measure
voltage:
from: battery positive terminal
to: ground
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greater than 11.5 V
greater than 11.5 V
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· Battery
discharged
· Battery
terminals corroded
· Poor
ground connection of battery
· Battery
defective
· Short
circuit to ground
from: battery +
to: fuses in fuse box
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· Measure
voltage:
from: ALDL plug X 13 Ter. F
to: ground
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greater than 11 V
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· Fuse
F 1, F 8 or F 24 defective.
· Lead
interruption
from: battery +, Ter.
30
to: ALDL plug X 13
Ter. F
· Short
circuit to ground
from: battery +, Ter.
30
to: ALDL plug X 13
Ter. F
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· Measure
voltage:
from: ALDL plug X 13 Ter. A
to: ground
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less than 0.1 V
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· Short
circuit in wiring harness
from: ALDL plug X 13
Ter. A
to: battery +, Ter.
30
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· Measure
voltage:
from: ALDL plug X 13 Ter. F
to: ALDL plug X 13 Ter. A
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greater than 11 V
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· Lead
interruption
from: ALDL plug X 13
Ter. A
to: ground
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· Carry
out TECH 1 self-test according to Operating Instructions
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TECH 1 OK
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· See
TECH 1 Operating Instructions
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· Ignition
OFF
· Disconnect
TECH 1 from ALDL plug
· Disconnect
battery
· Disconnect
wiring harness plug from
airbag control unit X 90
· Connect
battery
· Ignition
ON
· Measure
voltage:
from: ALDL plug X 13 Ter. G
to: ground
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System telltale ON
less than 0.1 V
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· Fault
in circuit, system telltale H 23
· Short
circuit to voltage
from: ALDL plug X 13
Ter. G
to: airbag control
unit wiring harness plug X 90 Ter. 3 and Ter. 4
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· Ignition
OFF
· Using
multimeter, measure resistance:
from: ALDL plug X 13 Ter. G
to: airbag control
unit wiring harness plug X 90 Ter. 3 and Ter. 4
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less than 2 W
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· Lead
interruption
from: ALDL plug X 13
Ter. G
to: airbag control
unit wiring harness plug X 90 Ter. 3 and Ter. 4
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· Disconnect
all wiring harness plugs from control unit which are connected with terminal
G of diagnostic plug X 13
(anti-theft warning system / board
computer /Multi-Info-Display...)
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· Using
multimeter, measure resistance:
from: ALDL plug X 13 Ter. G
to: ground
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greater than
100 kW (¥)
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· Short
circuit to ground
from: ALDL plug X 13
Ter. G
to: airbag control
unit wiring harness plug X 90 Ter. 3 and Ter. 4
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· Measure
voltage:
from: airbag control
unit wiring harness plug X 90 Ter. 7
to: ground
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less than 0.1 V
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· Short circuit to voltage
from: airbag control
unit wiring harness plug X 90 Ter. 7
to: battery +, Ter.
30
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· Ignition
ON
· Measure
voltage:
from: airbag control
unit wiring harness plug X 90 Ter. 7
to: ground
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greater than 11 V
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· Lead
interruption
from: airbag control
unit wiring harness plug X 90 Ter. 7
to: ignition lock S
1 Ter. 15
· Short
circuit to ground
from: airbag control
unit wiring harness plug X 90 Ter. 7
to: ignition lock S
1 Ter. 15
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· Measure
voltage:
from: airbag control
unit wiring harness plug X 90 Ter. 7
to: airbag control
unit wiring harness plug X 90 Ter. 10
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greater than 11 V
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· Lead
interruption
from: airbag control
unit wiring harness plug X 90 Ter. 10
to: ground
· Short circuit in wiring harness
from: airbag control
unit wiring harness plug X 90 Ter. 10
to: battery +, Ter.
30
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