Mitsubishi L200. Manual — part 229
CRUISE CONTROL
ENGINE AND EMISSION CONTROL
17-20
CHECK CHART FOR TROUBLE
SYMPTOMS
M1172002301938
Trouble symptom
Inspection
procedure No.
Reference page
Communication
with M.U.T.-III is
not possible.
Communication with the engine-ECU only
is impossible.
−
GROUP 13A
−
Troubleshooting,
Symptom Procedures,
Inspection Procedure 1
When the brake pedal is depressed, cruise control is not
cancelled.
1
When the clutch pedal is depressed, cruise control is not
cancelled <M/T>.
2
When the select lever is set to "N" position, cruise control is
not cancelled <A/T>.
3
When the "CANCEL" switch is pushed, cruise control is not
cancelled.
4
Cruise control cannot be set (No response when the
"COAST/SET" switch and the "ACC/RES" switch is pushed).
5
Hunting (repeated acceleration and deceleration) occurs at
the set vehicle speed.
6
When the "ON/OFF" switch is turned ON, the cruise control
indicator lamp does not illuminate (However, the cruise
control system is normal).
7
SYMPTOM PROCEDURES
Inspection Procedure 1: When the Brake Pedal is Depressed, Cruise Control is not Cancelled.
COMMENT ON TROUBLE SYMPTOM
The stop lamp switch circuit is suspected.
PROBABLE CAUSE
• Damaged harness or connector.
• Malfunction of the stop lamp switch.
• Malfunction of the engine-ECU.
DIAGNOSIS PROCEDURE
STEP 1. Check the data list.
Using M.U.T.-III, check the data list (Refer to
− data list reference table).
• Item 134: Brake switch
• Item 135: Stop lamp switch
Q: Is the check result normal?
YES :
Go to Step 2.
NO :
Check the stop lamp switch system (Refer
to
− Diagnosis Code Procedures,
Code No.P1571: Malfunction of the stop
lamp switch system). Then go to Step 3 .
STEP 2. Check the symptom.
Q: When the brake pedal is depressed, is the cruise
control cancelled?
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
Malfunction ).
NO :
Replace the engine-ECU (Refer to GROUP
13A
− Engine-ECU ). Then go to Step 3.
CRUISE CONTROL
ENGINE AND EMISSION CONTROL
17-21
STEP 3. Check the symptom.
Q: When the brake pedal is depressed, is the cruise
control cancelled?
YES :
The procedure is complete.
NO :
Return to Step 1.
Inspection Procedure 2: When the Clutch Pedal is Depressed, Cruise Control is not Cancelled <M/T>.
ACA01419
Wire colour code
B : Black LG : Light green G : Green L : Blue W : White Y : Yellow SB : Sky blue
BR : Brown O : Orange GR : Grey R : Red P : Pink V : Violet PU : Purple SI : Silver
CLUTCH
SWITCH
ENGINE-ECU
Clutch Switch System Circuit
AB
ACA01401
C-103 (B)
Connector: C-103 <LH drive vehicles>
AB
ACA01402
C-103 (B)
Connector: C-103 <RH drive vehicles>
AB
ACA01405
Connector: C-152 <LH drive vehicles>
AC
C-152
ACA01406 AC
C-152
Connector: C-152 <RH drive vehicles>
CRUISE CONTROL
ENGINE AND EMISSION CONTROL
17-22
OPERATION
• The engine-ECU connector C-103 terminal
No.112 monitor the clutch switch state.
• The clutch switch turn ON/OFF when the clutch
pedal is depressed/released, and the input signal
to the engine-ECU change. According to this
change, the engine-ECU judges the clutch switch
status.
COMMENT ON TROUBLE SYMPTOM
The cause is probably a malfunction of the clutch
switch circuit.
POSSIBLE CAUSES
• Damaged harness or connector.
• Malfunction of the clutch switch.
• Malfunction of the engine-ECU.
DIAGNOSIS PROCEDURE
STEP 1. Check the data list.
Using M.U.T.-III, check the data list (Refer to
− data list reference table).
• Item 131: Clutch switch
Q: Is the check result normal?
YES :
Go to Step 6.
NO :
Go to Step 2.
STEP 2. Connectors check: C-103 engine-ECU
connector and C-152 clutch switch connector.
Q: Is the check result normal?
YES :
Go to Step 3.
NO :
Repair or replace the damaged connector.
Then go to Step 7.
STEP 3. Check the harness wire between engine-
ECU connector C-103 terminal No.112 and clutch
switch connector C-152 terminal No.1, and
between clutch switch connector C-152 terminal
No.2 and earth.
• Check harness wire for open/short circuit and
damage.
Q: Is the check result normal?
YES :
Go to Step 4.
NO :
Repair or replace the damaged harness
wire. Then go to Step 7.
STEP 4. Check the clutch switch.
Refer to GROUP 21A
− Clutch Pedal, Inspection,
Clutch Switch Continuity Check .
Q: Is the check result normal?
YES :
Go to Step 5.
NO :
Replace the clutch switch (Refer to GROUP
21A
− Clutch Pedal ). Then go to Step 7.
STEP 5. Check the data list
Using M.U.T.-III, check the data list (Refer to
− data list reference table).
• Item 131: Clutch switch
Q: Is the check result normal?
YES :
Go to Step 6.
NO :
Replace the engine-ECU (Refer to GROUP
13A
− Engine-ECU ). Then go to Step 7.
STEP 6. Check the symptom.
Q: When the clutch pedal is depressed, is the cruise
control cancelled?
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
Malfunction ).
NO :
Replace the engine-ECU (Refer to GROUP
13A
− Engine-ECU ). Then go to Step 7.
STEP 7. Check the symptom.
Q: When the clutch pedal is depressed, is the cruise
control cancelled?
YES :
The procedure is complete.
NO :
Return to Step 1.
CRUISE CONTROL
ENGINE AND EMISSION CONTROL
17-23
Inspection Procedure 3: When the Selector Lever is Set to "N" Position, Cruise Control is not
Cancelled <A/T>.
OPERATION
When the selector lever is operated, the selector
lever position signal from the inhibitor switch is sent
to the A/T-ECU. Engine-ECU receives the selector
lever position signal from the A/T-ECU via the CAN
bus line.
COMMENTS ON TROUBLE SYMPTOM
• The inhibitor switch circuit is suspected.
• The CAN bus line between the engine-ECU and
the A/T-ECU, the A/T-ECU, the engine-ECU may
be defective.
PROBABLE CAUSES
• Malfunction of CAN bus system.
• Damaged harness or connector.
• Malfunction of the inhibitor switch.
• Malfunction of the A/T-ECU.
• Malfunction of the engine-ECU.
DIAGNOSIS PROCEDURE
CAUTION
• If there is any problem in the CAN bus lines,
an incorrect diagnosis code may be set. Prior
to this diagnosis, diagnose the CAN bus
lines.
• Before replacing the ECU, ensure that the
CAN bus lines is normal.
STEP 1. Check the CAN bus system diagnosis.
Using M.U.T.-III, perform CAN bus diagnosis (Refer
to GROUP 54C
− Explanation About The M.U.T-III
Can Bus Diagnostics ).
Q: Is the check result satisfactory?
YES :
Go to Step 2.
NO :
Repair the CAN bus lines (Refer to GROUP
54C
− Troubleshooting, Can Bus Diagnostic
Table ). Then go to Step 5.
STEP 2. Check the data list.
Using M.U.T.-III, check the data list (Refer to
− data list reference table).
• Item 42: Inhibitor switch
Q: Is the check result normal?
YES :
Go to Step 3.
NO :
Check the inhibitor switch system [Refer to
GROUP 23A
− Troubleshooting, Diagnosis
Code Procedures Code No.P1770: Inhibitor
switch system (Open Circuit) or , Code
No.P1771: Inhibitor switch system (Short
Circuit) ] <4A/T> or [Refer to GROUP 23A
−
Troubleshooting, Diagnosis Code
Procedures Code No.P1770: Inhibitor
switch system (Open Circuit) or , Code
No.P1771: Inhibitor switch system (Short
Circuit) ] <5A/T>. Then go to Step 5.
STEP 3. Check the A/T system diagnosis code.
Using M.U.T.-III, perform A/T system diagnosis code
(Refer to GROUP 23A
− Troubleshooting, Diagnosis
Function ).
Q: Is any diagnosis code set?
YES :
Repair the A/T system (Refer to GROUP
23A
− Troubleshooting, Diagnosis Code
Chart ). Then go to Step 5.
NO :
Go to Step 4.
STEP 4. Check the symptom.
Q: When the selector lever is set to "N" position, is
the cruise control cancelled?
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
Malfunction ).
NO :
Replace the engine-ECU (Refer to GROUP
13A
− Engine-ECU ). Then go to Step 5.
STEP 5. Check the symptom.
Q: When the selector lever is set to "N" position, is
the cruise control cancelled?
YES :
The procedure is complete.
NO :
Return to Step 1.
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