Mitsubishi Eclipse / Eclipse Spyder (2000-2002). Service and repair manual — part 679

SRS AIR BAG DIAGNOSIS

TSB Revision

SUPPLEMENTAL RESTRAINT SYSTEM (SRS)

52B-43

DIAGNOSIS

Required Special Tool:

•

MB991502: Scan Tool (MUT-II)

•

MB991613: SRS Check Harness

STEP 1. Check the side air bag module line using the scan
tool and MB991613 SRS Check harness.
(1) Disconnect side air bag module (LH) connector D-15.
(2) Connect special tool MB991613 connector (1).
(3) Connect the negative battery terminal.
(4) Erase DTC memory.

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

YES : Go to Step 2.
NO : Replace the seat back assembly of the front seat

(LH). Refer to GROUP 52A, Front Seat

P.52A-18

.

Then go to Step 3.

DTC

SYMPTOMS

81

•

Short circuit in side air bag module (LH) (squib) or harness

82

•

Open circuit in side air bag module (LH) (squib) or harness

•

Malfunction of connector contact

85

•

Short circuit in side air bag module (LH) (squib) harness leading to
the power supply

86

•

Short circuit in side air bag module (LH) (squib) harness leading to
ground

AC003098AB

MB991613

D-15

1

SRS AIR BAG DIAGNOSIS

TSB Revision

SUPPLEMENTAL RESTRAINT SYSTEM (SRS)

52B-44

STEP 2. Check the harness wires between SRS-ECU
connector C-74 and side air bag module (LH) connector D-
15.
Q: Are the harness wires between SRS-ECU connector C-

74 and side air bag module (LH) connector D-15 in good
condition?
YES : Go to Step 3.
NO : Repair them. Then go to Step 3.

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-66

.

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

P.00-6

.)

AC000358AF

CONNECTOR: C-74

SRS-ECU

ACCELERATOR PEDAL

CENTER REINFORCEMENT (LH)

AC002981AB

CONNECTOR: D-15

SRS AIR BAG DIAGNOSIS

TSB Revision

SUPPLEMENTAL RESTRAINT SYSTEM (SRS)

52B-45

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

AC002965AB

Side Impact Sensor (RH) Circuit

AC000358AF

CONNECTOR: C-74

SRS-ECU

ACCELERATOR PEDAL

CENTER REINFORCEMENT (LH)

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-76

. Go to Step 3.

NO : Go to Step 2.

AC003136AB

CONNECTOR: D-02

<ECLIPSE>

<ECLIPSE SPYDER>

FRONT
SEAT BELT

FRONT OF
VEHICLE

REAR
SPEAKER

FRONT
SEAT BELT

FRONT OF
VEHICLE

REAR SPEAKER
BRACKET