Mitsubishi Grandis. Manual — part 799
AUTO-CRUISE CONTROL
ENGINE AND EMISSION CONTROL
17-37
STEP 17. Connectors check: C-111 engine-ECU
connector <M/T> or C-111 engine-A/T-ECU
connector <A/T>, C-17 intermediate connector,
C-127 stop lamp switch connector
Q: Is the check result normal?
YES :
Go to Step 18.
NO :
Repair or replace the damaged
components. Then go to Step 23.
STEP 18. Check the harness between
engine-ECU connector C-111 <M/T> terminal
No.54 or engine-A/T-ECU connector C-111 <A/T>
terminal No.54 and stop lamp switch connector
C-127 terminal No.4.
Q: Is the check result normal?
YES :
Go to Step 19.
NO :
Repair the damaged harness wire. Then go
to Step 23.
STEP 19. Connectors check: C-127 stop lamp
switch connector, C-01 J/C (6)
Q: Is the check result normal?
YES :
Go to Step 20.
NO :
Repair or replace the damaged
components. Then go to Step 23.
AC311909AB
C-111 (GR)
Connector: C-111
AC311915AD
Connector: C-17
C-17
AC311916
Connector: C-127
AB
C-127
AC311909AB
C-111 (GR)
Connector: C-111
AC311916
Connector: C-127
AB
C-127
AC311916
Connectors: C-01, C-127
AD
C-127
C-127
C-01
C-01
AUTO-CRUISE CONTROL
ENGINE AND EMISSION CONTROL
17-38
STEP 20. Check the harness between stop lamp
switch connector C-127 terminal No.3 and earth.
Q: Is the check result normal?
YES :
Go to Step 21.
NO :
Repair the damaged harness wire. Then go
to Step 23.
STEP 21. MUT-III data list
Item 06: Brake switch (Refer to data list reference
table
).
Q: Is the check result normal?
YES :
Go to Step 22.
NO :
Replace the engine-ECU <M/T> or
engine-A/T-ECU <A/T> (Refer to GROUP
13A, Engine-ECU and Engine-A/T-ECU
STEP 22. Check the MUT-III diagnosis code No.
22.
Q: Is the MUT-III diagnosis code No. 22 output?
YES :
Replace the engine-ECU <M/T> or
engine-A/T-ECU <A/T> (Refer to GROUP
13A, Engine-ECU and Engine-A/T-ECU
NO :
It can be assumed that this malfunction is
intermittent.
STEP 23. Check the MUT-III diagnosis code No.
22.
Q: Is the MUT-III diagnosis code No. 22 output?
YES :
Return to Step 1.
NO :
The procedure is complete.
Code No. 23 Engine-ECU <M/T> or engine-A/T-ECU <A/T> and its related components
DIAGNOSIS CODE SET CONDITIONS
This diagnosis code is set when there is an failure in
the engine-ECU <M/T> or engine-A/T-ECU <A/T>
and its related components.
PROBABLE CAUSE
• Malfunction of the MPI system.
• Malfunction of the A/T system.
• Malfunction of the engine-ECU <M/T>.
• Malfunction of the engine-A/T-ECU <A/T>.
DIAGNOSIS
STEP 1. Check the MPI system diagnosis code.
Q: Is any diagnosis code set?
YES :
Repair the MPI control system. (Refer to
GROUP 13A, Troubleshooting
− Inspection
chart for diagnosis codeTrouble Code Chart
NO <M/T> :
Go to Step 3.
NO <A/T> :
Go to Step 2.
AC311916
Connector: C-127
AB
C-127
AC302155
AE
Ground terminal
AC302156
AE
Ground terminal
AUTO-CRUISE CONTROL
ENGINE AND EMISSION CONTROL
17-39
STEP 2. Check the A/T system diagnosis code.
Q: Is any diagnosis code set?
YES :
Repair the A/T system (Refer to GROUP
23A, Troubleshooting <A/T>
− Check chart
for diagnosis codes
). Then go to
Step 4.
NO :
Go to Step 3.
STEP 3. Check the MUT-III diagnosis code No. 23.
Q: Is the MUT-III diagnosis code No. 23 output?
YES :
Replace the engine-ECU <M/T> or
engine-A/T-ECU <A/T> (Refer to GROUP
13A, Engine-ECU and
Engine-A/T-ECU
). Then go to
Step 4.
NO :
This malfunction is intermittent. (Refer to
GROUP 00 - How to Use
Troubleshooting/Inspection Service Points
).
STEP 4. Check the MUT-III diagnosis code No. 23.
Q: Is the MUT-III diagnosis code No. 23 output?
YES :
Return to Step 1 .
NO :
This procedure is complete.
CHECK CHART FOR TROUBLE
SYMPTOMS
M1172002300430
SYMPTOM PROCEDURES
INSPECTION PROCEDURE 1: When the Brake Pedal is Depressed, Auto-cruise Control is not
Cancelled.
COMMENTS ON TROUBLE SYMPTOM
The stop lamp switch circuit is suspected.
PROBABLE CAUSE
• Malfunction of the connector.
• Malfunction of the harness.
Trouble symptom
Inspection
procedure No.
Reference page
Communication with
MUT-III is not
possible.
Communication with the engine-ECU
<M/T> or engine-A/T-ECU <A/T> only is
impossible
-
Group 13A,
Symptom
Procedures
−
Inspection
Procedure 1
Auto-cruise control
is not cancelled.
Even if brake pedal is depressed
1
Even if clutch pedal is depressed <M/T>
2
Even if select lever is set to N range <A/T> 3
Even if auto-cruise control CANCEL switch
in set to ON
4
Auto-cruise control cannot be set.
5
Hunting (repeated acceleration and deceleration) occurs at the
set vehicle speed. <M/T>
6
Hunting (repeated acceleration and deceleration) occurs at the
set vehicle speed. <A/T>
7
When the auto-cruise control MAIN switch is turned ON, the
auto-cruise control indicator lamp does not illuminate. (However,
the auto-cruise control system is normal).
8
AUTO-CRUISE CONTROL
ENGINE AND EMISSION CONTROL
17-40
• Malfunction of the stop lamp switch.
• Malfunction of the engine-ECU <M/T>.
• Malfunction of the engine-A/T-ECU <A/T>.
DIAGNOSIS
Refer to
<L.H. drive vehicles>,
<R.H. drive vehicles>, Diagnosis Trouble Code
Procedures
− Code No. 22: Stop lamp switch
system.
INSPECTION PROCEDURE 2: When the Clutch Pedal is Depressed, Auto-cruise Control is not
Cancelled <M/T>.
OPERATION
This circuit indicates the operation status of the
clutch pedal position switch. When the clutch switch
is ON (clutch pedal is depressed), the voltage of
engine-ECU terminal number 40 will indicate 0 volt.
COMMENTS ON TROUBLE SYMPTOM
The cause is probably a malfunction of the clutch
switch circuit.
POSSIBLE CAUSES
• Malfunction of the clutch switch.
Clutch switch circuit
AC311468
Wire colour code
B: Black LG: Light green G: Green L: Blue W: White Y: Yellow SB: Sky blue BR: Brown O: Orange GR: Gray
R: Red P: Pink V: Violet
Clutch switch
J/C (7)
Engine-ECU
V
V
B
B
B
B
B
B-P
B
B
C-01
C-32
J/C (6)
C-131
C-111
C-17
NOTE
*1: L.H. drive vehicles
*2: R.H. drive vehicles
*1
*2
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