2000 MITSUBISHI MONTERO Service Repair Manual

S
to p la m p sw it c h V
ehic le sp eed
s e nso r
I n hib it o r sw it c h T
hro ttle va lv e
c o ntr o lle r
T
hro ttle va lv e
c o ntr o lse rv o C
lu tc h sw it c h A
uto -c ru is e
c o ntr o lsw it c h
D ia gnosis
c o nnecto r M
ain sw it c h
E ngin e-E C U or
E ngin e-A /T -E C U
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P urc h ased f r o m w ww.W ork sh opM an uals .c o .u k

S
to p la m p sw it c h
Vehic le sp eed se nso r
I n hib it o r sw it c h
A/T -E C U
G
E actu ato r
( e le ctr o nic gove rn or) C
lu tc h sw it c h A
uto -c ru is e
c o ntr o lsw it c h
D ia gnosis
c o nnecto r M
ain sw it c h
E ngin e-E C U
S PEC IA L TO OL
T o ol N
um ber N
am e U
se M
B991502 M
UT-II su b
a sse m bly

T
R O UBLE SH O OTIN G
S TA NDARD FLO W OF DIA G NO SIS TR O UBLE SH O OTIN G
R efe r to GRO UP 00 -How to Use Tro uble sh ootin g/In sp ectio n Serv ic e Poin ts .
N O TE
C heck th at th e va cu um hose is co nnecte d co rre ctly and is not dam aged, and th en ca rry out th e dia gnosis .
D IA G NO SIS FU NCTIO N
M ETH O D OF REA DIN G TH E DIA G NO SIS CO DES
U sin g th e MUT-I
I
1 . Connect th e MUT-I
I
to th e dia gnosis co nnecto r (1 6-p in )
u nder th e in str u m ent under co ve r.
2 . Wit h th e ig nit io n sw it c h in th e ON posit io n,ta ke are adin g
o f th e dia gnosis co des.
C au tio n
T u rn off th e ig nit io n sw it c h befo re co nnectin g or
d is co nnectin g th e MUT-I
I
.
U sin g aAuto -c ru is e Contr o l In dic ato r Lam p
1 . Turn th e ig nit io n sw it c h ON wit h th e SET sw it c h on.T hen,
t u rn th e RESU M E sw it c h ON wit h in 1se co nd.
2 . Read a dia gnosis co de by obse rv in g th e fla sh dis p la y
p atte rn of th e auto -c ru is e co ntr o l in dic a to r la m p in th e
c o m bin atio n mete r.
I n dic atio n of dia g nosis co de by au to -c ru is e co ntr o l in dic ato r la m p
W hen th e dia gnosis co de No.2 3 is outp ut W
hen no dia gnosis co de is outp ut 1
2V 0
V 1
.5 s 0
.5 s
P ause
t im e:3 s 0
.5 s C
ontin uous ON and OFF
s ig nals atin te rv a ls of0 .5 s
1
2 V
0 V 0
.5 s D
ia gnosis
c o nnecto r A
uto -c ru is e
c o ntr o lsw it c h R
ESU M E
s w it c h : O N S
ET
s w it c h : O N
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ENGINE AND EMISSION CONTROL -Auto-cruise Control System17-10
METHOD OF ERASING THE DIAGNOSIS
CODES
Refer to GROUP 00 - How to Use Troubleshooting/Inspection
Service Points.
INSPECTION CHART FOR DIAGNOSIS CODES <6G7>
Code No.Diagnosis itemReference page
15Auto-cruise control switch system17-10
21Cancel latch signal system17-11
22Stop lamp switch system17-11
23Engine-ECU orengine-A/T-ECU system17-12
INSPECTION PROCEDURE FOR DIAGNOSIS CODES <6G7>
Code No. 15 Auto-cruise control switch systemProbable cause
This diagnosis code is output if the RESUME and SET switches of the auto-cruise
control switch remain on.DMalfunction of the auto-cruise control switch
DMalfunction of the connector
DMalfunction of the harness
DMalfunction of the throttle valve controller
Repair
Check the auto-cruise control switch. (Refer to P.17-29.)NG
Replace
OK
Check the following connectors:
D-205-3, D-205-2, D-205, E-10, D-11NG
Repair
NGCheck the harness between the auto-cruise control switch and
throttle valve controller.
NG
OK
Replace the throttle valve controller.
OK
Check trouble symptom.
Check trouble symptom.
NG


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ENGINE AND EMISSION CONTROL -Auto-cruise Control System17-11
Code No. 21 Cancel latch signal systemProbable cause
The throttle valve controller and engine-ECU or engine-A/T-ECU send
a cancelholding information to the engine-ECU or engine-A/T-ECU
via a cancel latch signal line and the serial communication line.
This diagnosis code is output if there is a failure in the cancel latch signal line, or
a disaccord in the communication data.DMalfunction of the connector
DMalfunction of the harness
DMalfunction of the throttle valve controller
DMalfunction of the engine-ECU
DMalfunction of the engine-A/T-ECU
Repair NG
RepairCheck the following connectors:
D-118, D-122, D-11NG
OK
Replace the throttle valve controller.
NG
NG
Check the harness between the throttle valve controller and engine-
ECU or engine-A/T-ECU .
Replace the engine-ECU or engine-A/T-ECU
Check trouble symptom.
OK
Check trouble symptom.
Check trouble symptom.NG
Code No. 22 Stop lamp switch systemProbable cause
This diagnosis code is output when the throttle valve controller detects a failure in
the stoplampswitch output.DMalfunction of the stoplampswitch
DMalfunction of the connector
DMalfunction of the harness
DMalfunction of the throttle valve controller
(2)NG
NG
Check the harness between the throttle valve connector and stop
lampswitch, and body earth, and repair if necessary.
NG
Repair
OK
Check trouble symptom.
Measure at the throttle valve controller connector D-11.
DDisconnect the connector and measure at the harness side.
(1) Voltage between terminal 25 and body earth
OK:0V (When brakepedal is not depressed.)
System voltage (When brakepedal is depressed.)
(2) Continuity between terminal 26 and body earth
OK:Continuity (When brakepedal is not depressed.)
No continuity (When brakepedal is depressed.)NO
Do the stop lamps illuminate normally?
OK
To the next page.
Check the following connectors:
D-136, D-26, D-33, E-13, D-128, D-11
D-136, D-124, E-13, D-128, D-11
OK
Check trouble symptom.
NG
Check the harness between the stoplampswitch and throttle valve
controller, and repair if necessary.NG
Repair
Check the stoplampcircuit.
YES
(1)NG
Check the following connectors:
D-136, D-26, E-10, D-11
D-136, D-124, E-10, D-11


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ENGINE AND EMISSION CONTROL -Auto-cruise Control System17-12
NG
Check the harness between the joint connector (4) and engine-ECU
or engine-A/T-ECU , and repair if necessary.
NG
Repair
OK
Check trouble symptom.
From the previous page.
OK
Check the following connectors:
D-128, D-63
D-128, D-122
OK
Check trouble symptom.
NG
Replace the throttle valve controller.NG
Measure at the engine-ECU connector D-117 or engine-A/T-
ECU connector D-122.
DDisconnect the connector and measure at the harness side.
DVoltage between terminal 63 and body earth or
voltage between terminal 123 and body earth
OK:0V (When brakepedal is not depressed.)
System voltage (When brakepedal is depressed.)
Code No. 23 Engine-ECU or engine-A/T-ECU
systemProbable cause
This diagnosis code is output if the engine-ECU or engine-A/T-ECU
system is defective as follows:
DCommunication error between the throttle valve controller and the engine-ECU

DCommunication error between the throttle valve controller and the engine-A/T-ECU

DMalfunction of the engine-ECU
DMalfunction of the engine-A/T-ECU
DMalfunction of the throttle position sensor
DMalfunction of the accelerator pedal positionsensor
DMalfunction of the throttle control servo
DMalfunction of the vehicle speed sensorDMalfunction of the engine-ECU
DMalfunction of the engine-A/T-ECU
MUT-
IISelf-Diag code
Confirm diagnosis code regarding the GDI system.Diagnosis
code outputCarry out the troubleshooting regarding the GDI system.
(Refer to GROUP 13A.)
No diagnosis code output
Check trouble symptom.


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ENGINE AND EMISSION CONTROL -Auto-cruise Control System17-13
INSPECTION CHART FOR DIAGNOSIS CODES <4M4>
Code No.Diagnosis itemReference page
15Auto-cruise control switch system17-13
22Stop lamp switch system17-14
23Engine-ECU system17-14
INSPECTION PROCEDURE FOR DIAGNOSIS CODES <4M4>
Code No. 15 Auto-cruise control switch systemProbable cause
This diagnosis code is output if the RESUME and SET switches of the auto-cruise
control switch remain on.DMalfunction of the auto-cruise control switch
DMalfunction of the connector
DMalfunction of the harness
DMalfunction of the engine-ECU
Repair
Check the auto-cruise control switch. (Refer to P.17-29.)NG
Replace
OK
Check the following connectors:
D-205-3, D-205-2, D-205, E-10, D-111NG
Repair
NGCheck the harness between the auto-cruise control switch and
engine-ECU.
NG
OK
Replace the engine-ECU.
OK
Check trouble symptom.
Check trouble symptom.
NG


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ENGINE AND EMISSION CONTROL -Auto-cruise Control System17-14
Code No. 22 Stop lamp switch systemProbable cause
This diagnosis code is output when the engine-ECU detects a failure in the stop
lampswitch output.DMalfunction of the stoplampswitch
DMalfunction of the connector
DMalfunction of the harness
DMalfunction of the engine-ECU
(2)NG
NG
Check the harness between the engine-ECU and stoplampswitch,
and body earth, and repair if necessary.
NG
Repair
OK
Check trouble symptom.
Measure at the engine-ECU connector D-111.
DDisconnect the connector and measure at the harness side.
(1) Voltage between terminal 39 and body earth
OK:0V (When brakepedal is not depressed.)
System voltage (When brakepedal is depressed.)
(2) Continuity between terminal 40 and body earth
OK:Continuity (When brakepedal is not depressed.)
No continuity (When brakepedal is depressed.)NO
Do the stop lamps illuminate normally?
OK
Check trouble symptom.
Check the following connectors:
D-136, D-26, D-33, E-13, D-128, D-111
D-136, D-124, E-13, D-128, D-111
OK
Check trouble symptom.
NG
Check the harness between the stoplampswitch and engine-ECU,
and repair if necessary.NG
Repair
Check the stoplampcircuit.
YES
(1)NG
Check the following connectors:
D-136, D-26, E-10, D-111
D-136, D-124, E-10, D-111 NG
Replace the engine-ECU.
Code No. 23 Engine-ECU systemProbable cause
This diagnosis code is output if the engine-ECU system is defective as follows:
DMalfunction of the engine-ECU
DMalfunction of the accelerator pedal positionsensor
DMalfunction of the GE actuator (electronic governor)
DMalfunction of the vehicle speed sensorDMalfunction of the engine-ECU
MUT-
IISelf-Diag code
Confirm diagnosis code regarding the diesel fuel system.Diagnosis
code outputCarry out the troubleshooting regarding the diesel fuel system.
(Refer to GROUP 13C.)
No diagnosis code output
Check trouble symptom.


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