Mitsubishi Grandis. Manual — part 797
AUTO-CRUISE CONTROL
ENGINE AND EMISSION CONTROL
17-29
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.
AC311916
Connector: C-127
AB
C-127
AC310685AC
Earth
terminal
AUTO-CRUISE CONTROL
ENGINE AND EMISSION CONTROL
17-30
Code No.22 Stop Lamp Switch System <R.H. drive vehicles>
OPERATION
• Battery positive voltage is supplied to the stop
lamp switch (terminal 2 and 4).
• When the brake pedal is depressed, battery
positive voltage is applied to the engine-ECU
<M/T> or engine-A/T-ECU <A/T> (terminal 39
and 54).
Stop lamp
switch
J/C (6)
B-P
W
W
B-P
L-O
L-O
V-Y
B
B
B
B
V-Y
C-111
C-17
C-01
C-18
C-125
C-127
Stop lamp
26
FUSIBLE
LINK
Engine-ECU <M/T> or
engine-A/T-ECU <A/T>
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
Stoplight Switch System Circuit <R.H. drive vehicles>
AC311229
AUTO-CRUISE CONTROL
ENGINE AND EMISSION CONTROL
17-31
DIAGNOSIS CODE SET CONDITIONS
Check Condition
• The "CRUISE" indicator light illuminates.
Judgement Criteria
• Short in stop lamp switch circuit.
• Open circuit in the brake switch circuit (between
engine-ECU <M/T> or engine-A/T-ECU <A/T>
terminal 54 and earth).
POSSIBLE CAUSES
• Malfunction of the stop lamp switch.
• Damaged harness or connector.
• Malfunction of the engine-ECU <M/T>.
• Malfunction of the engine-A/T-ECU <A/T>.
DIAGNOSIS
STEP 1. MUT-III data list
Item 05: Stop lamp switch (Refer to data list
reference table
Q: Is the check result normal?
YES :
Go to Step 14.
NO :
Go to Step 2.
STEP 2. Check the stop lamp operation.
Check the stop lamp operation.
OK:
Brake pedal depressed: Stop lamp will
illuminate
Brake pedal not depressed: Stop lamp
does not illuminate
Q: Is the check result normal?
YES :
Go to Step 3.
NO :
Go to Step 6.
STEP 3. Measure the voltage at engine-ECU
connector C-111 <M/T> or engine-A/T-ECU
connector C-111 <A/T>.
(1) Turn the ignition switch to the "ON" position.
(2) Measure the voltage between engine-ECU
connector C-111 <M/T> terminal No.39 or
engine-A/T-ECU connector C-111 <A/T> terminal
No.39 and earth.
OK:
Brake pedal depressed: System voltage
Brake pedal not depressed: 1 V or less
(3) Turn the ignition switch to the "LOCK" (OFF)
position.
Q: Is the check result normal?
YES :
Go to Step 13.
NO :
Go to Step 4.
AC311909AB
C-111 (GR)
Connector: C-111
AC304645AE
C-111 harness
connector:
harness side
AUTO-CRUISE CONTROL
ENGINE AND EMISSION CONTROL
17-32
STEP 4. Connectors check: C-111 engine-ECU
connector <M/T> or C-111 engine-A/T-ECU
connector <A/T>, C-18 intermediate connector
Q: Is the check result normal?
YES :
Go to Step 5.
NO :
Repair or replace the damaged
components. Then go to Step 23.
STEP 5. Check the harness between engine-ECU
connector C-111 <M/T> terminal No.39 or
engine-A/T-ECU connector C-111 <A/T> terminal
No.39 and stop lamp switch connector C-127
terminal No.1.
Q: Is the check result normal?
YES :
Go to Step 13.
NO :
Repair the damaged harness wire. Then go
to Step 23.
AC311909AB
C-111 (GR)
Connector: C-111
AC311915
Connector: C-18
C-18
AC
AC311909AB
C-111 (GR)
Connector: C-111
AC311916
Connector: C-127
AB
C-127
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