Engine Control System 1A-161
6
Check the clutch switch circuit for open wiring.
1.
Starter switch "OFF", and disconnect the
VIM.
2.
Disconnect the clutch switch connector
and jumper it.
3.
Starter switch "ON".
4.
Measure the voltage between VIM
connector pin and ground (e.g., frame or
body)
Was the voltage within range?
Pins 49-
ground: 24 V
Go to Step 11
Go to Step 7
7
Check the fuse side harness of the clutch
switch circuit for open wiring.
1.
Remove the jumper wire from the clutch
switch.
2.
Starter switch "ON".
3.
Measure the voltage between clutch
switch connector pin and ground (e.g.,
frame or body)
Was the voltage within range?
Pins 1-
ground: 24 V
Go to Step 8
Go to Step 12
8
Check the VIM side harness of the clutch
switch circuit for open wiring.
1.
Starter switch "OFF".
2.
Jumper the starter switch connector and
measure the resistance at the VIM
connector.
Was the resistance within range?
Pins 49-
ground
(jumpered:
pins 2-
ground): 0
Ω
Go to Step 4
Go to Step 12
9
Check the clutch switch circuit for +B short.
1.
Starter switch "OFF".
2.
Disconnect the VIM.
3.
At the VIM connector pins, measure the
resistance.
Was the resistance within range?
Pins 49-36/
38/75/76:
∞
Ω
Go to Step 10
Go to Step 12
10
Check the clutch switch circuit for short.
1.
Starter switch "OFF", and disconnect the
VIM.
2.
Disconnect the clutch switch connector.
3.
Starter switch "ON".
4.
Measure the voltage between VIM
connector pin and ground (such as frame
or body)
Was the voltage within range?
Pins 49-
ground: 0 V
Go to Step 11
Go to Step 12
11
Replace the clutch switch.
Is the action complete?
—
Verify repair and
go to Step 15
—
12
Repair or replace the faulty harness.
Is the action complete?
—
Verify repair and
go to Step 15
—
Step
Action
Value(s)
Yes
No
Summary of Contents for 4HL1
Page 267: ...No LG4HL WE 0229DOM...
