Mitsubishi 380. Manual — part 346
AUTO-CRUISE CONTROL
ENGINE AND EMISSION CONTROL
17-52
STEP 4. Using Diagnostic Tool MB991958, read the
auto-cruise control system diagnostic trouble code.
CAUTION
To prevent damage to Diagnostic Tool MB991958, always
turn the ignition switch to the "LOCK" (OFF) position
before connecting or disconnecting Diagnostic Tool
MB991958.
(1) Connect Diagnostic Tool MB991958 to the data link
(2) Turn the ignition switch to the "ON" position.
(3) Use Diagnostic Tool MB991958 to read the auto-cruise
control system diagnostic trouble codes. (Refer to
(4) Turn the ignition switch to the "LOCK" (OFF) position.
(5) Disconnect Diagnostic Tool MB991958.
Q: Is DTC 1574 set?
YES : Return to Step 1.
NO : The procedure is complete.
00DB076A
MB991910
DATA LINK
CONNECTOR
MB991824
MB991827
AUTO-CRUISE CONTROL
ENGINE AND EMISSION CONTROL
17-53
SYMPTOM CHART
M1172002300366
NOTE: If engine speed reaches and exceeds 6000
r/min the Auto Cruise Control System will be can-
celled automatically.
SYMPTOM
INSPECTION
PROCEDURE NO.
REFERENCE
PAGE
Communication with
Diagnostic Tool is
not possible
Communication with all systems is
impossible
-
Group 13A, MPI
Diagnosis
−
Symptom
Procedures
−
Inspection
Procedure 1
.
Communication with the Engine ECU only
is impossible
-
Group 13A, MPI
Diagnosis
−
Symptom
Procedures
−
Inspection
Procedure 2
.
Auto-cruise control
system is not
cancelled.
When brake pedal is depressed
1
When selector lever is moved to "N" range 2
When "CANCEL" switch is turned ON
3
When clutch pedal is depressed
4
Auto-cruise control system cannot be set.
5
Hunting (repeated acceleration and deceleration) occurs at the
set vehicle speed.
6
When "CRUISE" (MAIN) switch is turned "ON", "CRUISE"
indicator lamp inside combination meter does not illuminate.
(However, auto-cruise control system is normal).
7
AUTO-CRUISE CONTROL
ENGINE AND EMISSION CONTROL
17-54
SYMPTOM PROCEDURES
INSPECTION PROCEDURE 1: When the Brake Pedal is Depressed, Auto-cruise Control System is not
Cancelled.
.
COMMENT
The stoplamp switch circuit is suspected.
.
TROUBLESHOOTING HINTS (THE MOST
LIKELY CAUSES FOR THIS CASE:)
• Malfunction of the stoplamp switch.
• Damaged harness or connector.
• Malfunction of the Engine ECU.
Circuit drawings
• Refer to circuit diagrams GROUP-
• Refer to configuration diagrams GROUP-
• Refer to component locations GROUP-
DIAGNOSIS
Refer to
, Diagnostic Trouble Code Procedures
− DTC
22: Stoplamp Switch System.
INSPECTION PROCEDURE 2: When the Selector Lever is Moved to "N" Range, Auto-cruise Control
System is not Cancelled.
.
COMMENT
The transmission inhibitor switch circuit is suspected.
.
TROUBLESHOOTING HINTS (THE MOST
LIKELY CAUSES FOR THIS CASE:)
• Malfunction of the transmission inhibitor switch.
• Damaged harness or connector.
• Malfunction of the Engine ECU.
• Malfunction of A/T ECU.
Circuit drawings
• Refer to circuit diagrams GROUP-
• Refer to configuration diagrams GROUP-
• Refer to component locations GROUP-
DIAGNOSIS
Refer to GROUP 23A, A/T Diagnosis
− Diagnostic Trouble
Code Procedures
− DTC 0705: Transmission Inhibitor Switch
System (Open/short Circuit)
.
AUTO-CRUISE CONTROL
ENGINE AND EMISSION CONTROL
17-55
INSPECTION PROCEDURE 3: When the Auto-cruise Control "CANCEL" Switch is Set to ON,
Auto-cruise Control System is not Cancelled.
.
COMMENT
The cause is probably an open-circuit in the output in
the circuit inside the "CANCEL" switch.
.
TROUBLESHOOTING HINTS (THE MOST
LIKELY CAUSES FOR THIS CASE:)
• Malfunction of the auto-cruise control switch.
Circuit drawings
• Refer to circuit diagrams GROUP-
• Refer to configuration diagrams GROUP-
• Refer to component locations GROUP-
DIAGNOSIS
Replace the auto-cruise control switch. (Refer to
,
Auto-cruise Control).
INSPECTION PROCEDURE 4: When the Clutch Pedal is Depressed, Auto-cruise Control System is not
Cancelled.
.
COMMENT
The clutch switch circuit is suspected.
.
TROUBLESHOOTING HINTS (THE MOST
LIKELY CAUSES FOR THIS CASE:)
• Malfunction of the clutch switch.
• Damaged harness or connector.
• Malfunction of the Engine ECU.
Circuit drawings
• Refer to circuit diagrams GROUP-
• Refer to configuration diagrams GROUP-
• Refer to component locations GROUP-
DIAGNOSIS
Refer to
, Diagnostic Trouble Code Procedures
− DTC
0830: Clutch Switch System.
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