page 21 MITSUBISHI LANCER 2005 User Guide

COMBINATION METER ASSEMBLY
CHASSIS ELECTRICAL54A-31
TROUBLESHOOTING
SYMPTOM CHARTM1543007201086
MB991223
A: MB991219
B: MB991220
C: MB991221
D: MB991222Harness set
A: Test harness
B: LED harness
C: LED harness
adapter
D: ProbeMaking voltage and
resistance measurements
during troubleshooting
A: Connect pin contact
pressure inspection
B: Power circuit inspection
C: Power circuit inspection
D: Commercial tester
connection Tool Number Name Use
MB991223
A
B
C
D
AC
Symptom Inspection
procedure No.Reference page
Speedometer does not work (the other meters work). 1
P.54A-32
Speedometer does not work (the other meters work). 2
P.54A-37
Tachometer does not work (the other meters work). 3
P.54A-44
Fuel gauge does not work (the other meters work). 4
P.54A-48
Engine coolant temperature gauge does not work (the other
meters work).5
P.54A-51
Combination meters does not work (the instruments do not
work).6
P.54A-54

55-1
GROUP 55
HEATER, AIR
CONDITIONER AND
VENTILATION
CONTENTS
SERVICE SPECIFICATIONS . . . . . . .55-3
LUBRICANTS . . . . . . . . . . . . . . . . . .55-3
SPECIAL TOOLS . . . . . . . . . . . . . . . .55-4
TROUBLESHOOTING . . . . . . . . . . . .55-5DIAGNOSIS TROUBLESHOOTING
FLOW . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55-5
SYMPTOM CHART . . . . . . . . . . . . . . . . . . . 55-5
SYMPTOM PROCEDURES . . . . . . . . . . . . 55-5
CHECK AT ECU TERMINAL . . . . 55-67
CHECK AT ECU TERMINAL . . . . 55-68
Continued on next page
W ARNING S RE GA RDING S E RV ICIN G O F SUP P LE MEN TAL R ES TRAI NT S Y ST EM (SRS ) E Q UIP PE D VE HICL ES
I mp roper se rvi ce o r m ai nte na nce of a ny c omp onent of the SRS , or an y SRS -re la te d c om pone nt, ca n le a d to
personal injury or death to service personnel (from inadvertent firing of the air bag) or to the driver (from
re nd er ing the S RS inop er ati ve).
S e rvic e or m ai nten anc e of an y SRS com pon ent or SRS -re late d com pone nt m ust be pe rfor me d only a t an
authorized MITSUBISHI dealer.
M ITSUBISHI dealer p erso nnel must thoroughly review th is man ual, and esp ecially its GROU P 52B - Su pplemen tal
Restraint System (SR S) b efore beginn ing an y service o r maintenance of any comp onent of th e SRS or any SRS-
rel ated com ponent.
NOTE
The SRS includes the following components: front impact sens ors , SRS-ECU, SRS warning lamp, air bag module, c lock spring
and interconnecting wiring. Other SRS-related components (that may have to be remov ed/installed in connection with SRS
service or maintenance) are indicated in the table of c ontents by an asterisk (*).

TROUBLESHOOTING
HEATER, AIR CONDITIONER AND VENTILATION55-5
TROUBLESHOOTING
DIAGNOSIS TROUBLESHOOTING FLOWM1552009600364
Refer to GROUP 00, How to Use
Troubleshooting/Inspection Service Points P.00-5.
SYMPTOM CHARTM1552009900611
NOTE: Refer to GROUP 14, Troubleshooting P.14-5
for the condenser fan.
SYMPTOM PROCEDURES
INSPECTION PROCEDURE 1: When the Ignition Switch is "ON" the A/C does not Operate.
COMMENTS ON TROUBLE SYMPTOM
The blower system or the compressor system may
be defective if there is no cool air coming from the
spit hole.
TROUBLESHOOTING HINTS
•Malfunction of blower motor
•Malfunction of A/C compressor
DIAGNOSIS
Check that the blower motor operation when the
blower switch is moved to the "HI" position.
(1) Turn the ignition switch to the "ON" position.
(2) Turn the blower switch to the "HI" position.
Q: Does the blower motor operate when the blower
switch is moved to the "HI" position?
YES :
Refer to Inspection procedure 3
"When the A/C is operating, temperature
inside the passenger compartment does not
decrease (cool air is not emitted).
P.55-11."
YES : Refer to Inspection procedure 4
"When the A/C is operating, temperature
inside the passenger compartment does not
decrease (cool air is not emitted).
P.55-20."
NO : Refer to Inspection procedure 5 "Blower fan
and motor do not turn P.55-29." Symptom Inspection
ProcedureReference
Page
When the ignition switch is "ON" the A/C does not operate. 1
P.55-5
Inside/outside air selection is not possible. 2
P.55-6
When the A/C is operating, temperature inside the passenger
compartment does not decrease (cool air is not emitted). 3
P.55-11
When the A/C is operating, temperature inside the passenger
compartment does not decrease (cool air is not emitted). 4
P.55-20
Blower fan and motor do not turn. 5
P.55-29
Blower air amount cannot be changed. 6
P.55-39
Rear window defogger function does not operate. 7
P.55-42
Rear window defogger Timer function does not operate. 8
P.55-52
Malfunction of the A/C-ECU power supply system. 9
P.55-53
Malfunction of the A/C-ECU power supply system. 10
P.55-56
A/C compressor power supply system. 11
P.55-59
Condenser Fan does not operate. 12 Refer to
GROUP 14
P.14-5

90-1
GROUP 90
CIRCUIT DIAGRAMS
CONTENTS
J/B . . . . . . . . . . . . . . . . . . . . . . . . . . .90-4
J/C . . . . . . . . . . . . . . . . . . . . .90-6
J/C . . . . . . . . . . . . . . . . . . . . .90-8
CENTRALIZED JUNCTION . . . . . . . .90-10
POWER DISTRIBUTION SYSTEM
. . . . . . . . . . . . . . . . . . . . . . . .90-15
POWER DISTRIBUTION SYSTEM
. . . . . . . . . . . . . . . . . . . . . . . .90-17
STARTING SYSTEM . . . . . . .90-19
STARTING SYSTEM . . . . . . . .90-20
IGNITION SYSTEM
<4G1-M/T (LHD)>. . . . . . . . . . . . . . . .90-21
IGNITION SYSTEM
<4G1-M/T (RHD)> . . . . . . . . . . . . . . .90-22
IGNITION SYSTEM
<4G1-A/T (LHD)> . . . . . . . . . . . . . . . .90-23
IGNITION SYSTEM
<4G1-A/T (RHD)>. . . . . . . . . . . . . . . .90-24
IGNITION SYSTEM <4G6 (LHD)> . . .90-25
IGNITION SYSTEM <4G6 (RHD)> . . .90-26
CHARGING SYSTEM . . . . . . .90-27CHARGING SYSTEM . . . . . . .90-28
ENGINE CONTROL SYSTEM
<4G1-M/T (LHD)> . . . . . . . . . . . . . . . .90-29
ENGINE CONTROL SYSTEM
<4G1-M/T (RHD)> . . . . . . . . . . . . . . . .90-31
ENGINE CONTROL SYSTEM
<4G1-A/T (LHD)> . . . . . . . . . . . . . . . .90-33
ENGINE CONTROL SYSTEM
<4G1-A/T (RHD)> . . . . . . . . . . . . . . . .90-35
ENGINE CONTROL SYSTEM
<4G6 (LHD)> . . . . . . . . . . . . . . . . . . . .90-37
ENGINE CONTROL SYSTEM
<4G6 (RHD)> . . . . . . . . . . . . . . . . . . .90-39
COOLING SYSTEM . . . . . . . .90-41
COOLING SYSTEM . . . . . . . .90-42
INVECS-II 4A/T . . . . . . . . . . . .90-43
INVECS-II 4A/T . . . . . . . . . . .90-45
HEADLAMP . . . . . . . . . . . . . .90-47
HEADLAMP . . . . . . . . . . . . . .90-49
Continued on next page

90-2
TAIL LAMP, POSITION LAMP, LICENCE
PLATE LAMP AND LIGHTING MONITOR
BUZZER . . . . . . . . . . . . . . . . .90-51
TAIL LAMP, POSITION LAMP, LICENCE
PLATE LAMP AND LIGHTING MONITOR
BUZZER . . . . . . . . . . . . . . . .90-54
FRONT FOG LAMP . . . . . . . .90-57
FRONT FOG LAMP . . . . . . .90-59
ROOM LAMP AND LUGGAGE
COMPARTMENT LAMP
. . . . . . . . . . . . . . . .90-61
ROOM LAMP AND LUGGAGE
COMPARTMENT LAMP
. . . . . . . . . . . . . . . .90-63
ROOM LAMP,PERSONAL LAMP
AND LUGGAGE ROOM LAMP
. . . . . . . . . . . . . . . .90-65
ROOM LAMP,PERSONAL LAMP AND
LUGGAGE ROOM LAMP
. . . . . . . . . . . . . . .90-67
REAR FOG LAMP . . . . . . . . .90-69
REAR FOG LAMP . . . . . . . . .90-71
HEADLAMP LEVELLING SYSTEM
. . . . . . . . . . . . . . . . . . . . . . . .90-73
HEADLAMP LEVELLING SYSTEM
. . . . . . . . . . . . . . . . . . . . . . . .90-74
TURN SIGNAL LAMP AND HAZARD
WARNING LAMP . . . . . . . . .90-76
TURN SIGNAL LAMP AND HAZARD
WARNING LAMP . . . . . . . . .90-78
BACK-UP LAMP . . . . . . . . . .90-80BACK-UP LAMP . . . . . . . . . .90-81
STOP LAMP . . . . . .90-82
STOP LAMP . . . . . .90-83
STOP LAMP . . . . .90-84
STOP LAMP . . . . .90-85
HORN . . . . . . . . . . . . . . . . . . . . . . . . .90-86
METER AND GAUGE . . . . . .90-87
METER AND GAUGE . . . . . .90-89
FUEL WARNING LAMP, OIL PRESSURE
WARNING LAMP AND BRAKE WARNING
LAMP . . . . . . . . . . . . . . . . . . .90-91
FUEL WARNING LAMP, OIL PRESSURE
WARNING LAMP AND BRAKE WARNING
LAMP . . . . . . . . . . . . . . . . . . .90-92
POWER WINDOWS . . . . . . . .90-93
POWER WINDOWS . . . . . . . .90-95
CENTRAL DOOR LOCKING SYSTEM
ENTRY> . . . . . . . . . . . . . . . . . . . . . . .90-97
CENTRAL DOOR LOCKING SYSTEM
ENTRY> . . . . . . . . . . . . . . . . . . . . . . .90-99
CENTRAL DOOR LOCKING SYSTEM
ENTRY> . . . . . . . . . . . . . . . . . . . . . . .90-101
CENTRAL DOOR LOCKING SYSTEM
ENTRY> . . . . . . . . . . . . . . . . . . . . . . .90-103
Continued on next page