diagnostic MITSUBISHI 380 2005 Workshop Manual

AUTO-CRUISE CONTROL
ENGINE AND EMISSION CONTROL17-16
STEP 1. Using diagnostic tool , check data list item 78:
Clutch Switch.
To prevent damage to diagnostic tool , always turn the
ignition switch to the "LOCK"(OFF) position before con-
necting or disconnecting diagnostic tool .
(1) Connect diagnostic tool to the data link connector.
(2) Turn the ignition switch to the "ON" position.
(3) Set diagnostic tool to the data reading mode for item 78,
Clutch Switch.
When the clutch pedal is depressed the display on diag-
nostic tool should read "ON".
When the clutch pedal is released the display on diag-
nostic tool should read "OFF".
(4) Turn the ignition switch to the "LOCK"(OFF) position.
Q: Is the switch operating properly?
YES : It can be assumed that this malfunction is intermittent.
Refer to GROUP 00, How to Use
Troubleshooting/Inspection Service Points
How to
Cope with Intermittent Malfunctions 00-14.
NO : Then go to Step 2.
STEP 2. Check the clutch pedal adjustment and switch
operation.
Refer to GROUP 21A, Clutch - On-vehicle Service - Clutch
Pedal Check and Adjustment P.21A-2
Q: Is the pedal and switch adjustment correct?
YES : Go to Step 3.
NO : Adjust the pedal or replace the switch if damaged or
not operating correctly. Then go to Step 6.

AUTO-CRUISE CONTROL
ENGINE AND EMISSION CONTROL17-19
STEP 6. Measure the resistance between Clutch switch
connector C-07 (terminal No. 2) and earth.
(1) Measure the resitence between terminal No. 2 and ground.
The resistance should measure less than 2 ohms.
Q: Is the measured resistance less than 2 ohms?
YES : Go to Step 7.
NO : Repair harness wire or connection between Clutch
switch connector C-07 (terminal No. 2) and earth
because of open circuit. Then go to Step 7.
STEP 7. Test the OBD-II drive cycle.
(1) Carry out a test drive with the drive cycle pattern. Refer to
Diagnostic Function
OBD-II Drive Cycle P.13A-13.
(2) Read the diagnostic trouble code.
Q: Is DTC P0830 set?
YES : Retry the troubleshooting.
NO : The inspection is complete.

AUTO-CRUISE CONTROL
ENGINE AND EMISSION CONTROL17-21
CIRCUIT OPERATION
This circuit judges the signals of each switch
("COAST/SET", "ACC/RES" and "CANCEL") of the
auto-cruise control switch. The Engine ECU detects
the state of the auto-cruise control switch by sensing
the voltages shown below.
When all switches are OFF: 4.7 5.0 volts
When the "CRUISE" (MAIN) switch is "ON": 0
0.3 volt
When the "COAST/SET" switch is ON: 2.0 2.8
volts
When the "ACC/RES" switch is ON: 3.3 4.1
volts
When the "CANCEL" switch is ON: 0.8 1.5 volts
.
DTC SET CONDITIONS
Check Condition
The "CRUISE" indicator lamp illuminates.Judgement Criteria
If the auto-cruise control switch is operated, this
DTC will be set when the Engine ECU terminal
voltage is different from the standard value.
.
TROUBLESHOOTING HINTS (THE MOST
LIKELY CAUSES FOR THIS CASE:)
Malfunction of the auto-cruise control switch.
Malfunction of the clock spring.
Damaged harness or connector.
Malfunction of the Engine ECU.
Circuit drawings
Refer to circuit diagrams GROUP-90
Refer to configuration diagrams GROUP-80
Refer to component locations GROUP-70
DIAGNOSIS
Required Special Tools:
MB991958: Diagnostic Tool (MUT-III Sub Assembly)
MB991824: V.C.I.
MB991827: MUT-III USB Cable
MB991910: MUT-III Main Harness A
MB991223: Harness Set
MB992044: ENGINE-ECU Check Harness

AUTO-CRUISE CONTROL
ENGINE AND EMISSION CONTROL17-22
STEP 1. Using Diagnostic Tool MB991958, check data list
item 86: Main Switch, list item 92: Set Switch, item 91:
Resume Switch and list item 75: Cancel Switch.
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
connector. (Refer to P.17-11).
(2) Turn the ignition switch to the "ON" position.
(3) Set Diagnostic Tool MB991958 to data reading mode for
auto-cruise control system. (Refer to P.17-11).
Item 86: Main Switch.
When "CRUISE" (MAIN) switch is at the "ON" posi-
tion, the display on Diagnostic Tool MB991958
should be "ON".
When ""CRUISE" (MAIN) switch is at the "OFF"
position, the display on Diagnostic Tool MB991958
should be "OFF".
Item 92: Set Switch.
When "COAST/SET" switch is at the "ON" position,
the display on Diagnostic Tool MB991958 should be
"ON".
When "COAST/SET" switch is at the "OFF" position,
the display on Diagnostic Tool MB991958 should be
"OFF".
Item 91: Resume Switch.
When "ACC/RES" switch is at the "ON" position, the
display on Diagnostic Tool MB991958 should be
"ON".
When "ACC/RES" switch is at the "OFF" position,
the display on Diagnostic Tool MB991958 should be
"OFF".
Item 75: Cancel Switch.
When "CANCEL" switch is at the "ON" position, the
display on Diagnostic Tool MB991958 should be
"ON".
When "ACC/RES" switch is at the "OFF" position,
the display on Diagnostic Tool MB991958 should be
"OFF".
(4) Turn the ignition switch to the "LOCK" (OFF) position.
(5) Disconnect Diagnostic Tool MB991958.
Q: Is the switch operating properly?
YES : Go to Step 17.
NO : Go to Step 2.

AUTO-CRUISE CONTROL
ENGINE AND EMISSION CONTROL17-32
STEP 16. Check the auto-cruise control switch.
(1) Remove auto-cruise control switch. (Refer to P.17-75).
(2) Measure the resistance between terminal 2 and terminal 3
when each of the "CRUISE" (MAIN), "COAST/SET",
"ACC/RES" and "CANCEL" switch is pressed.
Q: Is the resistance within specifications?
YES : Install the air bag module (driver’s side). (Refer to
GROUP 52B, Air Bag Modules and Clock Spring
P.52B-237). Then go to Step 17.
NO : Replace the auto-cruise control switch. (Refer to
P.17-75). Install the air bag module (driver’s side).
(Refer to GROUP 52B, Air Bag Modules and Clock
Spring P.52B-237). Then go to Step 18.
STEP 17. Using Diagnostic Tool MB991958, read the
diagnostic trouble code.
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
connector. (Refer to P.17-11).
(2) Turn the ignition switch to the "ON" position.
(3) Set Diagnostic Tool MB991958 to read the diagnostic
trouble codes. (Refer to P.17-11).
(4) Turn the ignition switch to the "LOCK" (OFF) position.
(5) Disconnect Diagnostic Tool MB991958.
Q: Is DTC 1564 set?
YES : Replace the Engine ECU.[Refer to GROUP 13A,
Engine ECU 13A-675] . Then go to Step 18.
NO : It can be assumed that this malfunction is intermittent.
(Refer to GROUP 00, How to Use
Troubleshooting/Inspection Service Points
How to
Cope with Intermittent Malfunction P.00-14). SWITCH POSITION SPECIFIED CONDITION
"CRUISE" (MAIN) switch
"OFF"Open circuit
"CRUISE" (MAIN) switch
"ON"Less than 2 ohms
"CANCEL" switch ON Approximately 100
"ACC/RES" switch ON Approximately 887
"COAST/SET" switch ON Approximately 300

AUTO-CRUISE CONTROL
ENGINE AND EMISSION CONTROL17-33
STEP 18. Using Diagnostic Tool MB991958, read the
diagnostic trouble code.
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
connector. (Refer to P.17-11).
(2) Turn the ignition switch to the "ON" position.
(3) Set Diagnostic Tool MB991958 to read the diagnostic
trouble codes. (Refer to P.17-11).
(4) Turn the ignition switch to the "LOCK" (OFF) position.
(5) Disconnect Diagnostic Tool MB991958.
Q: Is DTC 1564 set?
YES : Return to Step 1.
NO : The procedure is complete.

AUTO-CRUISE CONTROL
ENGINE AND EMISSION CONTROL17-34
DTC 1575: Cancel Latch Signal System
.
DTC SET CONDITIONS
The Engine ECU communicates cancellation reten-
tion information between the two microprocessors.
This DTC is set when cancellation retention informa-
tion contains inconsistency.
.
TROUBLESHOOTING HINTS (THE MOST
LIKELY CAUSES FOR THIS CODE TO BE
SET ARE:)
Malfunction of the Engine ECU.
Circuit drawings
Refer to circuit diagrams GROUP-90
Refer to configuration diagrams GROUP-80
Refer to component locations GROUP-70
DIAGNOSIS
Replace the Engine ECU.[Refer to GROUP 13A, Engine ECU
13A-675] . Then check that diagnostic trouble code P1575 is
not set.

AUTO-CRUISE CONTROL
ENGINE AND EMISSION CONTROL17-36
DIAGNOSIS
Required Special Tools:
MB991958: Diagnostic ToolDiagnostic Tool (MUT-III Sub
Assembly)
MB991824: V.C.I.
MB991827: MUT-III USB Cable
MB991910: MUT-III Main Harness A
MB991223: Harness Set
MB992044: ENGINE-ECU Check Harness
STEP 1. Using Diagnostic Tool MB991958, check data list
item 74: Stoplamp Switch.
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
connector. (Refer to P.17-11).
(2) Turn the ignition switch to the "ON" position.
(3) Set Diagnostic Tool MB991958 to data reading mode for
auto-cruise control system. (Refer to P.17-11).
Item 74, Stoplamp Switch.
When the brake pedal is depressed, the display on
Diagnostic Tool MB991958 should be "ON".
When the brake pedal is released, the display on
Diagnostic Tool MB991958 should be "OFF".
(4) Turn the ignition switch to the "LOCK" (OFF) position.
(5) Disconnect Diagnostic Tool MB991958.
Q: Is the switch operating properly?
YES : Go to Step 14.
NO : Go to Step 2.
STEP 2. Check the stoplamp operation.
Check the stoplamp operation.
When the brake pedal is depressed, the stoplamp will
illuminate.
When the brake pedal is released, the stoplamp does
not illuminate.
Q: Does the stoplamp illuminate (when the brake pedal is
depressed) and the stoplamp does not illuminate (when
the brake pedal is released)?
YES : Go to Step 3.
NO : Go to Step 6.

AUTO-CRUISE CONTROL
ENGINE AND EMISSION CONTROL17-44
STEP 13. Using Diagnostic Tool MB991958, check data list
item 74: Stoplamp Switch.
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
connector. (Refer to P.17-11).
(2) Turn the ignition switch to the "ON" position.
(3) Set Diagnostic Tool MB991958 to data reading mode for
auto-cruise control system. (Refer to P.17-11).
Item 74, Stoplamp Switch.
When the brake pedal is depressed, the display on
Diagnostic Tool MB991958 should be "ON".
When the brake pedal is released, the display on
Diagnostic Tool MB991958 should be "OFF".
(4) Turn the ignition switch to the "LOCK" (OFF) position.
(5) Disconnect Diagnostic Tool MB991958.
Q: Is the switch operating properly?
YES : Go to Step 21.
NO : Replace the Engine ECU. [Refer to GROUP 13A,
Engine ECU 13A-675] . Then go to Step 22.
STEP 14. Using Diagnostic Tool MB991958, check data list
item 89: Normally closed Brake Switch.
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
connector. (Refer to P.17-11).
(2) Turn the ignition switch to the "ON" position.
(3) Set Diagnostic Tool MB991958 to data reading mode for
auto-cruise control system. (Refer to P.17-11).
Item 89, Normally closed Brake Switch.
When the brake pedal is depressed, the display on
Diagnostic Tool MB991958 should be "ON".
When the brake pedal is released, the display on
Diagnostic Tool MB991958 should be "OFF".
(4) Turn the ignition switch to the "LOCK" (OFF) position.
(5) Disconnect Diagnostic Tool MB991958.
Q: Is the switch operating properly?
YES : Go to Step 21.
NO : Go to Step 15.

AUTO-CRUISE CONTROL
ENGINE AND EMISSION CONTROL17-48
STEP 20. Using Diagnostic Tool MB991958, check data list
item 89: Normally closed Brake Switch.
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
connector. (Refer to P.17-11).
(2) Turn the ignition switch to the "ON" position.
(3) Set Diagnostic Tool MB991958 to data reading mode for
auto-cruise control system. (Refer to P.17-11).
Item 89, Normally closed Brake Switch.
When the brake pedal is depressed, the display on
Diagnostic Tool MB991958 should be "ON".
When the brake pedal is released, the display on
Diagnostic Tool MB991958 should be "OFF".
(4) Turn the ignition switch to the "LOCK" (OFF) position.
(5) Disconnect Diagnostic Tool MB991958.
Q: Is the switch operating properly?
YES : Go to Step 21.
NO : Replace the Engine ECU. [Refer to GROUP 13A,
Engine ECU 13A-675] . Then go to Step 22.
STEP 21. Using Diagnostic Tool MB991958, read the
diagnostic trouble codes.
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
connector. (Refer to P.17-11).
(2) Turn the ignition switch to the "ON" position.
(3) Set Diagnostic Tool MB991958 to read the diagnostic
trouble codes. (Refer to P.17-11).
(4) Turn the ignition switch to the "LOCK" (OFF) position.
(5) Disconnect Diagnostic Tool MB991958.
Q: Is DTC 1571 set?
YES : Replace the Engine ECU.[Refer to GROUP 13A,
Engine ECU 13A-675] . Then go to Step 22.
NO : It can be assumed that this malfunction is intermittent.
(Refer to GROUP 00, How to Use
Troubleshooting/Inspection Service Points
How to
Cope with Intermittent Malfunction P.00-14).