Mitsubishi 3000GT Service Manual page 471

ENGINE AND EMISSION CONTROL - Cruise Control Svstem
Trouble symptom
Cannot accelerate or resume Open or shot-t circuit in No.
speed by using the RESUME RESUME switch circuit in
switch.
Even when CANCEL switch is set Open or short circuit in If the input check Replace
to ON, cruise control is not can-
I
The cruise control system can be Malfunction of the ve- No.4
mph), or there is no automatic can-
The cruise control indicator light of Damaged or discon- No.3
the combination meter does not illu-
minate. (But cruise control system
I is normal)
I Malfunction of control function by Malfunction of circuit re-
ixed speed driving <A/T>
No shift to overdrive during manual
,
driving. <A/T>
Probable cause
control switch
Vacuum pump assembly No.5
circuit poor contact
Malfunction of the vacu-
cluding air leaks from
negative pressure pas-
sage)
Malfunction of the ECU
CANCEL switch circuit in
control switch
Malfunction of the ECU
Malfunction of
the
speedometer cable or the
speedometer drive gear
turbo)>
Malfunction of the ECU
light
Harness damaged or dis-
connected
Malfunction of the ECU
Open or short circuit in
harness
lated to
accelerator
switch OFF function
Malfunction of the ECU
lated to overdrive can-
of ECU
Revision
TSB
Check chart No. Remedy
Replace
switch.
Repair the harness or re-
place the vacuum pump
assembly.
Replace the ECU.
switch
code No. 27 indicates
a malfunction.
No.2
Replace the ECU
Repair the vehicle speed
sensor system, or replace
the part.
Replace the ECU.
Repair the harness or re-
place the light bulb.
Replace the ECU.
Repair the harness or re-
place the main switch.
No. 10
Repair the harness or re-
place the part.
No. 11
Repair the harness or re-
place the part.
the control
the control