Mitsubishi Lancer Evolution 7. Manual — part 361
SRS -
Troubleshooting
52B-9
WARNING LAMP CIRCUIT CONNECTOR LOCK SWITCH
Mechanism to automatically short-circuit the power supply
terminal and the earth terminal of the warning lamp circuit
when the SRS-ECU connector is disconnected. The structure
is the same as that of squib circuit connector lock switch.
INSPECTION CHART FOR DIAGNOSIS CODES
Inspect according to the inspection chart that is appropriate for the malfunction code.
Code no.
Diagnostic item
Page
14
SRS-ECU front impact analog G-sensor system
52B-11
15
SRS-ECU front impact safing G-sensor system
Short circuit in the
sensor
52B-11
16
SRS-ECU front impact safing G-sensor system
Open circuit in the
sensor
21*
1
Driver’s air bag module (squib) system
Short circuit between
terminals of the squib
circuit
52B-12
22*
1
Driver’s air bag module (squib) system
Open in the squib
circuit
52B-16
24*
1
Front passenger’s air bag module (squib) system
Short circuit between
terminals of the squib
circuit
52B-20
25*
1
Front passenger’s air bag module (squib) system
Open in the squib
circuit
52B-22
26*
1
Driver’s seat belt pre-tensioner (squib) system
Short circuit between
terminals of the squib
circuit
52B-23
27*
1
Driver’s seat belt pre-tensioner (squib) system
Open in the squib
circuit
52B-25
28*
1
Front passenger’s seat belt pre-tensioner (squib) system
Short circuit between
terminals of the squib
circuit
52B-26
29*
1
Front passenger’s seat belt pre-tensioner (squib) system/
Open in the squib
circuit
52B-28
31
SRS-ECU DC-DC converter system
Increased
terminal
voltage
52B-11
32
SRS-ECU DC-DC converter system
Decreased
terminal
voltage
Ignition switch (IG
1
)
SRS warning lamp
SRS-ECU harness
side connector
Short spring
ON
ON
OFF
OFF
Connector*
lock switch
NOTE
*:connector engaged:ON
connector disengaged:OFF
SRS -
Troubleshooting
52B-10
Code no.
Page
Diagnostic item
34*
2
Connector lock system
52B-29
35
SRS-ECU (deployed air bag) system
52B-29
41*
2
Power supply circuit system (fuse No.2 circuit)
52B-30
42*
2
Power supply circuit system (fuse No.3 circuit)
52B-32
43*
2
SRS warning lamp drive circuit system
Lamp does not illumi-
nate.
52B-33
SRS warning lamp drive circuit system
Lamp does not go out.
52B-33
44*
2
SRS warning lamp drive circuit system
52B-33
45
SRS-EUC internal circuit system including non-volatile memory (EEPROM)
52B-11
51
Driver’s air bag module (squib) ignition drive circuit system
Short in the ignition
drive circuit
52B-11
52
Driver’s air bag module (squib) ignition drive circuit system
Open in the ignition
drive circuit
54
Front passenger’s air bag (squib) ignition drive circuit
system
Short in the ignition
drive circuit
52B-11
55
Front passenger’s air bag (squib) ignition drive circuit
system
Open in the ignition
drive circuit
56
Driver’s seat belt pre-tensioner (squib) ignition drive circuit
system
Short in the ignition
drive circuit
52B-11
57
Driver’s seat belt pre-tensioner (squib) ignition drive circuit
system
Open in the ignition
drive circuit
58
Front passenger’s seat belt pre-tensioner (squib) ignition
drive circuit system
Short in the ignition
drive circuit
52B-11
59
Front passenger’s seat belt pre-tensioner (squib) ignition
drive circuit system
Open in the ignition
drive circuit
61
Driver’s air bag module (squib) system
Short-circuited to
power supply
52B-34
62
Driver’s air bag module (squib) system
Short-circuited to earth
64
Front passenger’s air bag module (squib) system
Short-circuited to
power supply
52B-38
65
Front passenger’s air bag module (squib) system
Short-circuited to earth
66
Driver’s seat belt pre-tensioner (squib) system
Short-circuited to
power supply
52B-39
67
Driver’s seat belt pre-tensioner (squib) system
Short-circuited to earth
68
Front passenger’s seat belt pre-tensioner (squib) system
Short-circuited to
power supply
52B-40
69
Front passenger’s seat belt pre-tensioner (squib) system
Short-circuited to earth
NOTE
(1) *
1
: If the trouble(s) are removed, the SRS warning lamp go out with diagnosis code history stored.
(2) *
2
: If the trouble(s) are removed, the SRS warning lamp will go out with diagnosis code history automatically erased.
(3) When the battery has been discharged, diagnosis code No.41 or 42 is stored. Check the battery when either of
these is displayed.
SRS -
Troubleshooting
52B-11
INSPECTION PROCEDURE CLASSIFIED BY DIAGNOSIS CODE
Code No.14, 15, 16, 31, 32, 45, 51, 52, 54, 55, 56, 57, 58, 59
System inside SRS-ECU
Probable cause
Malfunction is present inside SRS-ECU. See table below for what each code
tells.
D
Malfunction of SRS-ECU
Code No.
Defective parts
Trouble
14
Front impact analog G-sensor
D
Not operating
D
Abnormal characteristics
D
Abnormal output
15
Front impact safing G-sensor
D
Short in the circuit
16
D
Open in the circuit
31
DC-DC converter
D
Terminal voltage of the converter higher than specified for
five seconds or more
32
D
Terminal voltage of the converter lower than specified for
5 seconds or more (this code is not detected when code
No.41 or 42, which indicates discharged battery, has been
detected)
45
Non-volatile memory (EEPROM)
D
Defective parts inside
51
Driver’s air bag module (squib)
D
Short in the circuit
51
Driver’s air bag module (squib)
ignition drive circuit
D
Short in the circuit
52
ignition drive circuit
D
Open in the circuit
54
Front passenger’s air bag module
(squib) ignition drive circuit
D
Short in the circuit
55
(squib) ignition drive circuit
D
Open in the circuit
56
Driver’s seat belt pre-tensioner
(squib) ignition drive circuit
D
Short in the circuit
57
(squib) ignition drive circuit
D
Open in the circuit
58
Front passenger’s seat belt pre-ten-
sioner (squib) ignition drive circuit
D
Short in the circuit
59
sioner (squib) ignition drive circuit
D
Open in the circuit
If the above-mentioned code No. is output, replace the SRS-ECU.
SRS -
Troubleshooting
52B-12
Code No.21 Driver’s air bag module (squib) system
Possible Cause
This code is output when short circuit occurs between terminals of the
SRS-ECU driver’s air bag module (squib) circuit.
However, SRS warning lamp goes out when a normal operation is resumed
(diagnosis code is not cleared.)
D
Connector engagement faulty or short bar faulty*
D
Short circuit in the clock spring
D
Short circuit between terminals of the driver’s air
bag module (squib) circuit
D
Faulty connector
D
SRS-ECU inoperable
NOTE:
(1) *: The connector of the squib circuit contains a short bar (short-circuiting the positive (+) cable and
the negative (-) cable to avoid an erroneous deployment caused by static electricity when a connector
is not connected). Thus, when a connector is connected, the short bar may not be released due
to improper engagement of the connector or faulty connector as shown in the illustration below.
Disconnect the connector as shown in the illustration below, then reconnect it. Check that a diagnosis
code is output again after erasing the memory. If the diagnosis code is not output, the above-mentioned
code is output due to improper engagement of the connector.
C-204
C-207
SRS-ECU
Clock spring
Driver’s air bag module
C-21
(2) Two different types of driver’s air bag modules by model are featured. Thus, two types of air bag
module by model are described in the following flowchart.
RS: Steering wheel and air bag module separate type
RS-II: Steering wheel and air bag module incorporate type
<RS>
<RS-II>
Нет комментариевНе стесняйтесь поделиться с нами вашим ценным мнением.
Текст