Mitsubishi Galant. Manual — part 601

SRS AIR BAG DIAGNOSIS

TSB Revision

SUPPLEMENTAL RESTRAINT SYSTEM(SRS)

52B-45

STEP 3. Check for DTC.

Q: Is any of DTC 81, 82, 85 or 86 output?

YES : Replace the SRS-ECU. Refer to

P.52B-65

.

NO : This diagnosis is compleate.(If no malfunctions are

not found in all steps, an intermittent malfunction is
suspected. Refer to GROUP 00, How to Use
Troubleshooting/Inspection Service Points

−

How to

Cope with Intermittent Malfunction.)

DTC 89: Right hand side-air bag module (squib) system fault 5 for power supply circuit
DTC 96: Right hand side-air bag module (squib) system fault 6 for communication system

AC000825AB

Side Impact Sensor (RH) Circuit

SRS AIR BAG DIAGNOSIS

TSB Revision

SUPPLEMENTAL RESTRAINT SYSTEM(SRS)

52B-46

CIRCUIT OPERATION

•

The SRS-ECU judges how severe a 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.

DTC SET CONDITIONS

•

These DTC are output if communication between
the side impact sensor (RH) and the SRS-ECU is
not possible or faulty.

TROUBLESHOOTING HINTS

•

Damaged wiring harnesses or connectors

•

Malfunction of the side impact sensor (RH)

•

Malfunction of the SRS-ECU

DIAGNOSIS

Required Special Tool:

•

MB991502: Scan Tool (MUT-II)

STEP 1. Check the side impact sensor
(1)Replace the side impact sensor (RH) with the side impact

sensor (LH)

(2)Connect the negative battery terminal.
(3)Erase DTC memory.

Q: Is any of DTC 89 or 96 erased or DTC 79 or 93 out put?

YES : Replace the side impact sensor (RH) with a new one.

Refer to

P.52B-74

. Go to Step 3.

NO : Go to Step 2.

AC003211AB

CONNECTOR: D-09

AC003195AE

CONNECTOR: C-44, C-45

CENTER
REINFORCEMENT

SRS-ECU

AC003212AB

CONNECTOR: D-18

SRS AIR BAG DIAGNOSIS

TSB Revision

SUPPLEMENTAL RESTRAINT SYSTEM(SRS)

52B-47

STEP 2. Check the harness wires between SRS-ECU
connector C-45 and side impact sensor (RH) connector D-
09.
NOTE: After inspecting intermediate connector D-18, inspect
the wiring harness. If the intermediate connector D-18 is
damaged, repair or replace it. Refer to GROUP 00E, Harness
Connector Inspection

P.00E-2

. Then go to Step 3. If harness

wires are in good condition, go to Step 3. If any harness wires
between SRS-ECU connector C-45 and side impact sensor
(RH) connector D-09 are damaged, repair them or install the
sensor cable. Refer to

P.52B-74

. Then go to Step 3.

Q: Are the harness wires between SRS-ECU connector C-

45 and side impact sensor (RH) connector D-09?
YES : Go to Step 3.
NO : Repair them. Then go to Step 3.

STEP 3. Check for DTC.

Q: Is any of DTC 89 or 96 output?

YES : Replace the SRS-ECU. Refer to

P.52B-65

.

NO : This diagnosis is complete.(If no malfunctions are not

found in all steps, an intermittent malfunction is
suspected. Refer to GROUP 00, How to Use
Troubleshooting/Inspection Service Points

−

How to

Cope with Intermittent Malfunction.)

AC003195AD

CONNECTOR: C-45

CENTER
REINFORCEMENT

SRS-ECU

AC003211AB

CONNECTOR: D-09

AC003212AB

CONNECTOR: D-18

SRS AIR BAG DIAGNOSIS

TSB Revision

SUPPLEMENTAL RESTRAINT SYSTEM(SRS)

52B-48

DTC 91: Left hand side-impact sensor power supply circuit system

AC000826AB

Side Impact Sensor (LH) Power Supply Circuit

AC003195AD

CONNECTOR: C-45

CENTER
REINFORCEMENT

SRS-ECU

AC003208AB

CONNECTOR: D-23

AC003207AB

CONNECTOR: D-20