Mitsubishi 3000GT 1991, Service Manual

Page: 1030 / 1146

SUPPLEMENTAL RESTRAINT SYSTEM (SRS)
Troubleshooting
SELF-DIAGNOSIS QUICK REFERENCE CHART
Fault
No.
11
32
Diagnosis code name
[Failure mode]
(NORMAL)
G-SENS. TRBL
[Short circuit]
G-SENS. TRBL 2
[One open-circuit]
G-SENS. TRBL 3
[Two open-circuit]
TRBL
[Short circuit]
TRBL 2
[Open-circuit]
VO. HI
VO. LO
CRANKING TRBL
UNLOCKED
Explanation
Normal. The SRS is in good order.
The circuits for the front impact sensor are shorted
to each other.
Right or left impact sensor cirucit is open or the
wire from the sensor to the SDU is open-circuit.
Right and left impact sensor circuits are open or the
wires from the sensors to the SDU are open-circuit.
The circuits for the air bag module are
shorted to each other or the circuit is grounded.
The air bag module circuit is open or the wire
from the air bag to the SDU (clock spring) is
circuit.
The capacitor (integrated in the terminal voltage
is higher than the specified value for 5 seconds.
The capacitor (integrated in the terminal voltage
is lower than the specified value for 5 seconds.
The circuit for the cranking signal is shorted to
some power supply circuits.
It takes at least 45 seconds that the SDU detects
this fault.
The lock switch (short bar) of the SDU double lock
connector is open.
Service
Perform TEST 5
Perform TEST 6
Turn the ignition key
to the “LOCK” posi-
tion, disconnect the
negative battery
cable and tape the
terminal.
After waiting at
least 30 seconds,
replace the SDU.
(Refer to
Perform TEST 7
Perform TEST 8
NOTE IMPORTANT
(1) After repairing the SRS, reconnect the battery cable, erase the diagnosis code memory from the
Multi-use Tester and check the SRS warning light operation to verify the system functions
properly. (Refer to TEST 1.)
(2) SDU SRS Diagnosis Unit
TSB Revision