Mitsubishi Lancer Evolution IX. Manual — part 624
![](/vehicles/winoney/wruvea/ger/purethithous.png)
TROUBLESHOOTING
SUPPLEMENTAL RESTRAINT SYSTEM (SRS)
52B-9
CHECK CHART FOR DIAGNOSIS CODES
M1524003300885
Inspect according to the inspection chart that is
appropriate for the diagnosis code.
Code No.
Diagnosis item
Reference Page
1A
Front impact sensor (LH) circuit short
1B
Front impact sensor (LH) circuit open
1C
Front impact sensor (LH) short-circuited to power supply
1D
Front impact sensor (LH) short-circuited to earth
2A
Front impact sensor (RH) circuit short
2B
Front impact sensor (RH) circuit open
2C
Front impact sensor (RH) short-circuited to power supply
2D
Front impact sensor (RH) short-circuited to earth
14
Analogue G-sensor malfunction
15
Safing G-sensor (for frontal collision) short-circuited
16
Safing G-sensor (for frontal collision) open-circuited
21*
2
Driver's air bag module (squib) system (short-circuited
between terminals of the squib circuit)
22*
2
Driver's air bag module (squib) system (open-circuited in the
squib circuit)
24*
2
Passenger's (front) air bag module (squib) system
(short-circuited between terminals of the squib circuit)
25*
2
Passenger's (front) air bag module (squib) system
(open-circuited in the squib circuit)
26*
2
Driver's seat belt pre-tensioner (squib) system
(short-circuited between terminals of the squib circuit)
27*
2
Driver's seat belt pre-tensioner (squib) system
(open-circuited in the squib circuit)
28*
2
Passenger's (front) seat belt pre-tensioner (squib) system
(short-circuit between terminals of the squib circuit)
29*
2
Passenger's (front) seat belt pre-tensioner (squib) system
(open-circuited in the squib circuit)
31
SRS-ECU capacitor circuit voltage too high
32
SRS-ECU capacitor circuit voltage too low
34*
1
SRS-ECU connector lock out of order
35
Ignition of the air bag completed
39
Air bag deployed simultaneously
41*
1
Power supply voltage (IG1 (A) voltage) drops abnormally.
42*
1
Power supply voltage (IG1 (B) voltage) drops abnormally.
43*
1
SRS warning lamp circuit
open-circuited
Lamp does not illuminate
Lamp does not switch off
44*
1
SRS warning lamp circuit malfunction
![](/vehicles/winoney/wruvea/ger/yos.png)
TROUBLESHOOTING
SUPPLEMENTAL RESTRAINT SYSTEM (SRS)
52B-10
NOTE:
.
1. *
1
: If the vehicle condition returns to normal, the diagnosis code will be automatically erased, and the SRS
warning lamp will return to normal.
2. *
2
: However, if no diagnosis code resets, the SRS warning lamp will be switched off (The diagnosis code
will be retained).
3. If the vehicle has a discharged battery, it will store the diagnosis code 41 or 42. When these diagnosis
codes are read, check the battery.
45
SRS-ECU non-volatile memory (EEPROM) and A/D
converter system
46*
1
Improper installed of SRS-ECU
51
Driver's air bag squib activating circuit short-circuited
52
Driver's air bag squib activating circuit open-circuited
54
Passenger's (front) air bag squib activating circuit
short-circuited
55
Passenger's (front) air bag squib activating circuit
open-circuited
56
Driver’s seat belt pre-tensioner activating circuit short-
circuited
57
Driver’s seat belt pre-tensioner activating circuit open-
circuited
58
Passenger’s (front) seat belt pre-tensioner activating circuit
short- circuited
59
Passenger’s (front) seat belt pre-tensioner activating circuit
open- circuited
61
Driver's air bag module (squib) system (short-circuited to the
power supply)
62
Driver's air bag module (squib) system (short-circuited to the
earth)
64
Passenger's (front) air bag module (squib) system
(short-circuited to the power supply)
65
Passenger's (front) air bag module (squib) system
(short-circuited to the earth)
66
Driver's seat belt pre-tensioner (squib) system
(short-circuited to the power the supply)
67
Driver's seat belt pre-tensioner (squib) system
(short-circuited to the earth)
68
Passenger's (front) seat belt pre-tensioner (squib) system
(short-circuited to the power supply)
69
Passenger's (front) seat belt pre-tensioner (squib) system
(short-circuited to the earth)
Code No.
Diagnosis item
Reference Page
![](/vehicles/winoney/wruvea/ger/mal.png)
TROUBLESHOOTING
SUPPLEMENTAL RESTRAINT SYSTEM (SRS)
52B-11
DIAGNOSTIC TROUBLE CODE
PROCEDURES
Code No.1A Front impact sensor (LH) circuit short
Code No.1B Front impact sensor (LH) circuit open
Code No.1C Front impact sensor (LH) short-circuited to power supply
Code No.1D Front impact sensor (LH) short-circuited to earth
Code No.2A Front impact sensor (RH) circuit short
Code No.2B Front impact sensor (RH) circuit open
Code No.2C Front impact sensor (RH) short-circuited to power supply
Code No.2D Front impact sensor (RH) short-circuited to earth
OPERATION
• When the left and right front impact sensors
detect a collision, the switches inside the sensors
turn ON.
• SRS-ECU judges how severe a collision is by
detecting signals from the front impact sensors
and the front air bag analogue G-sensor. If the
impact is over a predetermined level, the
SRS-ECU sends an ignition signal. At this time, if
the front air bag safing G-sensor is on, the SRS
air bag will inflate.
MICROCOMPUTER
INTERFACE CIRCUIT
SRS-ECU
FRONT IMPACT
SENSOR (LH)
FRONT IMPACT
SENSOR (RH)
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
NOTE
: LH drive vehicles
: RH drive vehicles
Front Impact Sensor Circuit
![](/vehicles/winoney/wruvea/ger/veat.png)
TROUBLESHOOTING
SUPPLEMENTAL RESTRAINT SYSTEM (SRS)
52B-12
DIAGNOSIS CODE SET CONDITIONS
These diagnosis codes are set if these are abnormal
resistance between the input terminals of the front
impact sensors.
The most likely causes for these codes to be set are
shown in the table below:
PROBABLE CAUSE
• Damaged harness wires and connectors
• Front impact sensor failed
• Malfunction of the SRS-ECU
DIAGNOSIS
Step 1. Check the front impact sensor.
Refer to
Q: Is the check result satisfactory?
YES :
Go to Step 2.
NO :
Replace the front impact sensor (Refer to
).
Code No.
Trouble causes
1A
• Left front impact sensor or its wiring shorted
1B
• Left front impact sensor or wiring open circuit
1C
• Short to the power supply in the left front impact sensor harness
1D
• Short to body earth in the left front impact sensor harness
2A
• Right front impact sensor or its wiring shorted
2B
• Right front impact sensor or wiring open circuit
2C
• Short to the power supply in the right front impact sensor harness
2D
• Short to body earth in the right front impact sensor harness
Нет комментариевНе стесняйтесь поделиться с нами вашим ценным мнением.
Текст