Content .. 111 112 113 114 ..

Acura RL. Manual - part 113

71-22

Short to power in driver's
seat position sensor

73-1X

Open in the driver's e-
pretensioner motor ('06-
08 models)

74-2X

Open in the front
passenger's e-pretensioner
motor ('06-08 models)

76-3X

Faulty F-can
communication or
internal failure of e-
pretensioner unit ('06-08
models)

76-4X

Internal failure of e-
pretensioner unit ('06-08
models)

76-5X

76-61

No signal from the e-
pretensioner unit ('06-08
models)

76-63

Internal failure of e-
pretensioner unit ('06-08
models)

81-4X

Internal failure of the
front passenger's weight
sensor unit

81-5X

81-61

No signal from the front
passenger's weight sensor
unit

81-62

Response data error from
the front passenger's
weight sensor unit

81-63

Internal failure of the
front passenger's weight
sensor unit

81-64

81-71

Front passenger's weight
sensor unit does not
calibrate

81-78

81-79

Front passenger's weight
sensors initial check
failure

82-1X

No signal from the inner
side front passenger's
weight sensor

83-2X

No signal from the outer
side front passenger's
weight sensor

85-4X

Internal failure of the
OPDS unit

85-5X

2007 Acura RL

2005-08 RESTRAINTS SRS (Supplemental Restraint System) - RL

Friday, June 05, 2009 2:21:55 PM

Page 36

85-61

No signal from the OPDS
unit

85-63

Internal failure of the
OPDS unit

85-64
85-71

OPDS unit not initialized

85-78
85-79

OPDS sensor initial check
failure

86-1X

Faulty OPDS sensor

86-2X
87-3X

Side airbag cutoff
indicator stays on/off

91-1X

Internal failure of SRS
unit

91-2X

Short to ground in the
SRS indicator circuit

92-1X

Open in front passenger's
airbag cutoff indicator

92-2X

Open or short to ground
in passenger's airbag
cutoff indicator

A1-1X

Faulty Dower supply (VA
line)

A2-1X

Faulty power supply (VB
line)

B2-1X

No signal from the rear
safing sensor

B2-2X

Internal failure of the rear
safing sensor

B2-2X

B2-9X

B2-BX

B2-CX

Faulty power supply to
the rear safing sensor

EX-XX

Control operation
recorded

FX-XX

Airbags and/or tensioners
deployment recorded

NOTE:

The "x" at the end of each DTC denotes a numeric character (0 thru 9) or an alpha character (A
thru F) that you will see on the HDS display. The character is unrelated to your troubleshooting; it
designates the SRS unit manufacturer and other details used for product analysis.

(1)

The SRS indicator comes on and stays on whenever the ignition switch is in the ON (II) position,
or until the code is cleared.

(2)

The SRS indicator comes on when the DTC is set. The SRS indicator will not come on after the
ignition switch is cycled from ON (II) to OFF (0), but the DTC will be stored in the SRS unit.

2007 Acura RL

2005-08 RESTRAINTS SRS (Supplemental Restraint System) - RL

Friday, June 05, 2009 2:21:55 PM

Page 37

SYMPTOM TROUBLESHOOTING INDEX

SYSTEM DESCRIPTION

SRS COMPONENTS

Airbags

The SRS is a safety device which, when used with the seat belt, is designed to help protect the driver and
front passenger in a frontal impact exceeding a certain set limit. The system consists of the SRS unit,
including safing sensor and impact sensor (A), the cable reel (B), the driver's airbag (C), the front
passenger's airbag (D), side airbags (E), side curtain airbags (L), seat belt tensioners (I), front impact sensors
(J), side impact sensors (first) (F), and side impact sensors (second) (K).

Since the driver's and front passenger's airbags use the same sensors, both normally inflate at the same time.
However, it is possible for only one airbag to inflate. This can occur when the severity of a collision is at the

Symptom

Diagnostic procedure

Also check for

SRS indicator does not come
on

Symptom Troubleshooting (see
SRS INDICATOR DOES NOT
COME ON )

Communication with HDS

SRS indicator stays on, but no
DTCs are stored

Symptom Troubleshooting (see
SRS INDICATOR STAYS ON,
BUT NO DTCS ARE STORED )

Charging system for under or
overcharging

Side airbag cutoff indicator
stays on after bulb check, and
no DTCs are stored, or side
airbag cutoff indicator is
flashing



Make sure nothing is on the
front passenger's seat.



If the side airbag cutoff
indicator stays on after the
ignition switch is turned ON
(II), initialize the OPDS unit
(see OPDS UNIT
INITIALIZATION ).



If the side airbag cutoff
indicator operates
normally, the system is
OK.



If the side airbag cutoff
indicator stays on,
replace the OPDS
sensor (see FRONT
SEAT-BACK
COVER
REPLACEMENT ).
The sensor is part of the
seat-back pad.

DTC 87-3x troubleshooting (see
DTC 87-3X ("X" CAN BE 0
THRU 9 OR A THRU F):
SIDE AIRBAG CUTOFF
INDICATOR STAYS
ON/OFF ).

HDS does not communicate
with the SRS unit or the vehicle

Troubleshoot the DLC circuit (see
'08 MODEL )

2007 Acura RL

2005-08 RESTRAINTS SRS (Supplemental Restraint System) - RL

Friday, June 05, 2009 2:21:55 PM

Page 38

margin, or threshold, that the SRS unit determines whether or not the airbags will deploy. In such cases, the
seat belt will provide sufficient protection, and the supplemental protection offered by the airbag would be
minimal.

Fig. 44: Identifying SRS Components Locations
Courtesy of AMERICAN HONDA MOTOR CO., INC.

Front Passenger's Weight Sensors

The front passenger's weight sensor unit (M) is under the front passenger's seat along with the front
passenger's weight sensors (N). The weight sensors detect the weight on the seat, and send the information
to the front passenger's weight sensor unit. If the total weight is about 65 lbs (30 kg) or less, the front
passenger's weight sensor unit sends a signal to the SRS unit to prevent the passenger's airbag from
deploying. When the passenger's airbag is disabled, the passenger airbag cutoff indicator on the center panel
comes on to alert the driver that the front passenger's airbag will not deploy in a front-end collision.

Driver's Seat Position Sensor

The driver's seat position sensor (0) is under the driver's seat on the left side. When the driver's seat is
moved to its full forward position, the deployment of the driver's airbag is moderated to decrease its force of
impact during a front-end collision.

Rear Safing Sensor

The rear safing sensor (P) is located under the middle of the rear seat. The rear safing sensor performs the
same basic function as the safing sensor in the SRS unit. It measures sideways G force, such as the force the
vehicle would receive in a side collision in the rear, and sends that information to the SRS unit. The SRS
unit uses that information, and the information from the second side impact sensors to determine the side
that is impacted and the force. If the threshold is met, the SRS unit deploys the side airbag, the side curtain
airbag and the seat belt tensioner on that side.

Side Airbags

The side airbags (E) are in each front seat-back. They help protect the upper torso of the driver or front seat
passenger during a moderate to severe side impact. Side impact sensors (first) (F) in each door sill, side
impact sensors (second) (K) in each rear door sill, rear safing sensor under the rear seat (P), and the SRS
unit safing sensor detect such an impact and instantly inflate the driver's or the passenger's side airbag. Only

2007 Acura RL

2005-08 RESTRAINTS SRS (Supplemental Restraint System) - RL

Friday, June 05, 2009 2:21:55 PM

Page 39

Content .. 111 112 113 114 ..