Mitsubishi Eclipse / Eclipse Spyder (2000-2002). Service and repair manual — part 673
SRS AIR BAG DIAGNOSIS
TSB Revision
SUPPLEMENTAL RESTRAINT SYSTEM (SRS)
52B-19
NOTE:
.
1. *1: If the vehicle condition returns to normal, the DTC will be automatically erased, and the SRS warning
light will return to normal.
2. *2: However, if no DTC resets, the SRS warning light will be switched off (The DTC will be retained).
<Vehicles without SRS side air bag>
3. If the vehicle has a discharged battery, it will store the DTC 41 or 42. When these DTC are read, check the
battery condition.
73
Right hand side-air bag module (squib) system detected short
circuit
74
Right hand side-air bag module (squib) system detected open
circuit
75
Right hand side-air bag module (squib) system fault power supply
circuit
76
Right hand side-air bag module (squib) system fault ground circuit
79Left hand side-air bag module (squib) system fault 5 for power
supply circuit
81*
2
Left hand side-air bag module (squib) system fault 1
82*
2
Left hand side-air bag module (squib) system fault 2
83
Left hand side-air bag module (squib) system fault 3 for ignition
drive circuit
84
Left hand side-air bag module (squib) system fault 4 for ignition
drive circuit
85
Left hand side-air bag module (squib) system fault power supply
circuit
86
Left hand side-air bag module (squib) system fault ground circuit
89Right hand side-air bag module (squib) system fault 5 for power
supply circuit
91*
1
Left hand side-impact sensor power supply circuit system
92
Left hand side-impact sensor system for fault 1
93
Left hand side-air bag module (squib) system fault 6 for
communication system
94*
1
Right hand side-impact sensor power supply circuit system
95
Right hand side-impact sensor system for fault 1
96
Right hand side-air bag module (squib) system fault 6 for
communication system
CODE NO.
ON-BOARD DIAGNOSTIC ITEM
REFERENCE PAGE
SRS AIR BAG DIAGNOSIS
TSB Revision
SUPPLEMENTAL RESTRAINT SYSTEM (SRS)
52B-20
SYMPTOM CHART
M1524003400116
DIAGNOSTIC TROUBLE CODE PROCEDURES
DTC 14: Analog G-sensor system in the SRS-ECU
DTC 15: Safing G-sensor short circuit
DTC 16: Safing G-sensor open circuit
DTC 17: Safing G-sensor for side air bag faults
DTC 31: SRS-ECU capacitor circuit voltage too high
DTC 32: SRS-ECU capacitor circuit voltage too low
DTC 45: SRS-ECU non-volatile memory (EEPROM) and A/D converter system
DTC 51: Driver's side air bag module (squib ignition drive circuit) system detected short circuit
DTC 52: Driver's side air bag module (squib ignition drive circuit) system detected open circuit
DTC 54: Passenger (front)-side air bag module (squib ignition drive circuit) system detected short
circuit
DTC 55: Passenger (front)-side air bag module (squib ignition drive circuit) system detected open
circuit
DTC 73: Right hand side-air bag module (squib) sytem detected short circuit
DTC 74: RIght hand side-air bag module (squib) sytem detected open circuit
DTC 83: Left hand side-air bag module (squib) system fault 3 for ignition drive circuit
DTC 84: Left hand side-air bag module (squib) system fault 4 for ignition drive circuit
DTC SET CONDITIONS
•
These DTC are output when a fault is detected in
the SRS-ECU. The most likely causes for this
code to be set are shown in the table below:
TROUBLESHOOTING HINTS
•
Malfunction of the SRS-ECU
SYMPTOMS
INSPECTION PROCEDURE NO. REFERENCE PAGE
Communication with scan tool MB991502 is not
possible (Communication with all systems is not
possible).
-
GROUP 13A,
DIAGNOSIS
GROUP 13B,
DIAGNOSIS
Communication with scan tool MB991502 is not
possible (Communication is not possible with
SRS only).
1
When the ignition switch is turned to "ON"
(engine stopped), the SRS warning light does
not illuminate.
Refer to DTC No. 43.
After the ignition switch is turned to "ON," the
SRS warning light does not go off within
approximately 7 seconds.
Refer to DTC No. 43.
CODE NO.
DEFECTIVE PART
SYMPTOMS
14
Analog G-sensor
•
When the analog G-sensor is not operating
•
When the characteristics of the analog G-sensor are
abnormal
•
When the output from the analog G-sensor is
abnormal
15
Safing G-sensor (front air bag)
•
Short circuit in the safing G-sensor
16
•
Open circuit in the safing G-sensor
SRS AIR BAG DIAGNOSIS
TSB Revision
SUPPLEMENTAL RESTRAINT SYSTEM (SRS)
52B-21
DIAGNOSIS
Replace the SRS-ECU. Refer to
Q: Is any of DTC output?
YES : There is no action to be taken
NO : This diagnosis is complete.
17
Safing G-sensor (side air bag)
•
When the safing G-sensor is not operating
•
When the characteristics of the safing G-sensor are
abnormal
•
When the output from the safing G-sensor is abnormal
31
Capacitor
•
Voltage at the capacitor terminal is higher than the
specified value for five seconds or more
32
•
Voltage at the capacitor terminal is lower than the
specified value for five seconds or more (This is not
detected if diagnostic trouble code No. 41 or 42
indicating battery positive voltage drop has been
output.)
45
Non-volatile memory (EEPROM)
and A/D converter
•
When the non-volatile memory (EEPROM) and A/D
converter system are abnormal
51
Driver's side air bag module
(squib ignition drive circuit)
•
Short circuit in the squib ignition drive circuit
52
•
Open circuit in the squib ignition drive circuit
54
Front passenger's side air bag
module (squib ignition drive
circuit)
•
Short circuit in the squib ignition drive circuit
55
•
Open circuit in the squib ignition drive circuit
73
Side air bag module (RH) (squib
ignition drive circuit)
•
Short circuit in the squib ignition drive circuit
74
•
Open circuit in the squib ignition drive circuit
83
Side air bag module (LH) (squib
ignition drive circuit)
•
Short circuit in the squib ignition drive circuit
84
•
Open circuit in the squib ignition drive circuit
CODE NO.
DEFECTIVE PART
SYMPTOMS
SRS AIR BAG DIAGNOSIS
TSB Revision
SUPPLEMENTAL RESTRAINT SYSTEM (SRS)
52B-22
DTC 21 : Driver's side air bag module (squib) system fault 1
DTC 22: Driver's side air bag module (squib) system fault 2
DTC 61: Driver's side air bag module (squib) system fault for power supply circuit
DTC 62: Driver's side air bag module (squib) system fault for ground circuit
CIRCUIT OPERATION
•
The SRS-ECU judges how severe a collision is
by detecting signals from the left and right side
impact sensors and the analog G-sensor. If the
impact is over a predetermined level, the SRS-
ECU outputs an ignition signal. At this time, if the
safing G-sensor is on, the SRS air bag will inflate.
•
The ignition signal is input to the air bag module
via the clock spring to inflate the air bag.
DTC SET CONDITIONS
•
These DTC are output if there is abnormal
resistance between the input terminals of the
driver's side air bag module (squib). The most
likely causes for this code to be set are shown in
the table below: However, if no DTC resets, the
SRS warning light will be switched off (The DTC
will be retained). <Vehicles without SRS side air
bag>
AC003877AB
Driver's Side Air Bag Module (Squib) Circuit
AC000358AD
SRS-ECU
ACCELERATOR PEDAL
CENTER REINFORCEMENT(LH)
CONNECTOR: C-72
AC000359AD
CONNECTOR: C-81, C-85
C-81
C-85
CLOCK
SPRING
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