CRUISE CONTROL SYSTEM Troubleshooting
DIAGNOSIS DISPLAY PATTERNS AND CODES
Code
Display patterns (output codes)
Probable cause
Check chart No.
No.
(Use with voltmeter)
11
same pattern repeatedly displayed
Vacuum pump assembly drive
out of order
12
Vehicle speed signal system
of order
I
4
Control switch out of order (When SET or
2
RESUME switch is kept in ON state
continuously for more than 60 seconds)
Control switch out of order
Throttle position sensor or idle switch out
9
of order
Normal code
NOTE
When two or more problems occur simultaneously, the
three latest code numbers are displayed in the order of
lowest code number first.
2. Even if the problem represented by the code number
marked occurs during cruise control operation, the cruise
control mode will not be canceled.
3.
When the system is normal, the diagnosis code is displayed
as described below.
If a multi-use tester is used:
“NORMAL! will be displayed.
If a voltmeter is used:
Continuous ON/OFF signals will be displayed at 0.5
second intervals. (Refer to the illustration at the left.)
INPUT CHECKING
Input checks should be made when the cruise control system
cannot be set and when it is necessary to check (when a
malfunction related to the cruise control system occurs)
whether or not the input signals are normal.
NOTE
1.
If inspection of self-diagnosis is necessary, confirm diagno-
sis code first and conduct input check.
2. Input check can be conducted by set operations.
diagnosis terminal outputs display patterns.
3. Display codes are displayed only if the circuit is normal
according to the conditions shown in the table on the next
Perform checks using the following procedures.
(1) Connect a multi-use tester or a voltmeter to the diagnosis
inspection connector of the junction block.
NOTE
Connect a voltmeter using the same procedure as for
inspection of diagnosis output.
TSB Revision
Summary of Contents for 3000GT 1991
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