Acura TSX / Honda Accord CL. Manual — part 707

Fig. 36: Identifying Dashboard Wire Harness 24-pin Connector
Courtesy of AMERICAN HONDA MOTOR CO., INC.

DTC 85-79

1. Before proceeding, see AIR BAG SAFETY PRECAUTIONS . Erase Diagnostic Trouble Code (DTC)

memory. See ERASING DIAGNOSTIC TROUBLE CODE MEMORY under DIAGNOSTICS. Turn
ignition switch to ON position. If AIR BAG warning light stays on, go to next step. If AIR BAG warning
light goes off after about 6 seconds, system is okay at this time. Check for intermittent malfunction. See
TROUBLESHOOTING INTERMITTENT FAILURES under DIAGNOSTICS.

2. Ensure nothing is on right front seat. Turn ignition switch to ON position. If AIR BAG warning light goes

off after about 6 seconds, system is okay at this time. If AIR BAG warning light stays on, initialize
Occupant Position Detection System (OPDS) unit. See INITIALIZING OCCUPANT POSITION
DETECTION SYSTEM (OPDS) UNIT under DIAGNOSTICS.

DTC 86-1, 86-2

1. Before proceeding, see AIR BAG SAFETY PRECAUTIONS . Erase Diagnostic Trouble Code (DTC)

memory. See ERASING DIAGNOSTIC TROUBLE CODE MEMORY under DIAGNOSTICS. Turn
ignition switch to ON position. If AIR BAG warning light stays on, go to next step. If AIR BAG warning
light goes off after about 6 seconds, system is okay at this time. Check for intermittent malfunction. See
TROUBLESHOOTING INTERMITTENT FAILURES under DIAGNOSTICS.

2004 Acura TSX

2004 ACCESSORIES/SAFETY EQUIPMENT Acura - Air Bag Restraint Systems

2. Access Occupant Position Detection System (OPDS) unit and OPDS sensor and check connectors for

proper connection. See OCCUPANT POSITION DETECTION SYSTEM (OPDS) UNIT under
REMOVAL & INSTALLATION. If connections are okay, go to next step. If connections are not okay,
reconnect connectors. Erase Diagnostic Trouble Code (DTC) memory.

3. Replace OPDS sensor and seat back foam. Erase Diagnostic Trouble Code (DTC) memory. Retrieve

DTC. See RETRIEVING DIAGNOSTIC TROUBLE CODE (DTC) under DIAGNOSTICS. If DTC
86-1 or 86-2 is indicated, go to next step. If DTC 86-1 or 86-2 is not indicated, system is okay at this
time.

4. Replace OPDS unit. See OCCUPANT POSITION DETECTION SYSTEM (OPDS) UNIT under

REMOVAL & INSTALLATION. Initialize OPDS unit. See INITIALIZING OCCUPANT POSITION
DETECTION SYSTEM (OPDS) UNIT under DIAGNOSTICS. Erase Diagnostic Trouble Code (DTC)
memory. Retrieve DTC. If DTC 86-1 or 86-2 is indicated, replace SRS unit. See SRS UNIT under
REMOVAL & INSTALLATION. If DTC 86-1 or 86-2 is not indicated, system is okay at this time.

DTC 87-31, 87-32

1. Before proceeding, see AIR BAG SAFETY PRECAUTIONS . Erase Diagnostic Trouble Code (DTC)

memory. See ERASING DIAGNOSTIC TROUBLE CODE MEMORY under DIAGNOSTICS. Turn
ignition switch to ON position. If AIR BAG warning light stays on, go to next step. If AIR BAG warning
light goes off after about 6 seconds, system is okay at this time. Check for intermittent malfunction. See
TROUBLESHOOTING INTERMITTENT FAILURES under DIAGNOSTICS.

2. Turn ignition switch to OFF position. Ensure nothing is on right front seat. Access Occupant Position

Detection System (OPDS) unit and disconnect OPDS unit 8-pin connector. See OCCUPANT
POSITION DETECTION SYSTEM (OPDS) UNIT under REMOVAL & INSTALLATION. Turn
ignition switch to ON position. Measure voltage between ground and OPDS harness 8-pin connector
terminal No. 3. See Fig. 35 . If battery voltage is present, replace OPDS unit. If battery voltage is not
present, go to next step.

3. Turn ignition switch to OFF position. Access instrument cluster harness connectors. See INSTRUMENT

CLUSTER under REMOVAL & INSTALLATION. Disconnect instrument cluster 22-pin harness
connector "B". See Fig. 32 . Measure resistance between ground and OPDS harness 8-pin connector
terminal No. 3. If resistance is more than one megohm, go to next step. If resistance is less than one
megohm, short to ground exists in OPDS harness, floor wire harness or dashboard wire harness. Replace
appropriate wire harness.

4. Measure resistance between instrument cluster 22-pin harness connector "B", terminal No. 10 and OPDS

harness 8-pin connector terminal No. 3. If resistance is 0-1 ohm, replace instrument cluster. If resistance
is not 0-1 ohm, check for open in OPDS unit harness, floor wire harness or dashboard wire harness.
Replace appropriate harness. See WIRING DIAGRAMS .

DTC A1-1

1. Check fuse No. 10 (7.5-amp) located in instrument panel fuse/relay box. If fuse is okay, go to next step. If

fuse is blown, repair short to ground in fuse No. 10 circuit. See WIRING DIAGRAMS .

2. Disable air bag system. See DISABLING SYSTEM under DISABLING & ACTIVATING AIR BAG

SYSTEM. Access and disconnect SRS unit connector "A". See SRS UNIT under REMOVAL &
INSTALLATION. Reconnect negative battery cable. Connect voltmeter between ground and SRS unit
connector "A", terminal No. 17. See Fig. 33 . Turn ignition switch to ON position and measure voltage. If

2004 Acura TSX

2004 ACCESSORIES/SAFETY EQUIPMENT Acura - Air Bag Restraint Systems

battery voltage is present, check connection between SRS unit connector "A" and SRS unit. If connection
is okay, replace SRS unit. If battery voltage is not present, go to next step.

3. Turn ignition switch to OFF position. Disconnect instrument panel fuse/relay box connector "S". See Fig.

37 . Measure resistance between connector "S", terminal No. 1 and SRS unit connector "A", terminal No.
17. If resistance is 0-1 ohm, check connections between fuse/relay box connector "S" and instrument
panel fuse/relay box. If connection is okay, replace instrument panel fuse box. If resistance is more than
one ohm, replace dashboard wire harness.

Fig. 37: Identifying Instrument Panel Fuse/relay Box Connector "S"
Courtesy of AMERICAN HONDA MOTOR CO., INC.

DTC A2-1

1. Check fuse No. 22 (10-amp) in instrument panel fuse/relay box. If fuse is okay, go to step 4 . If fuse is

blown, go to next step.

2. Replace fuse No. 22 (10-amp). Turn ignition switch to ON position and wait at least 30 seconds. Check

fuse No. 22. If fuse No. 22 is okay, system is okay at this time. If fuse No. 22 is blown, go to next step.

3. Replace fuse No. 22 (10-amp). Disable air bag system. See DISABLING SYSTEM under DISABLING

& ACTIVATING AIR BAG SYSTEM. Access and disconnect SRS unit connector "A". See SRS UNIT
under REMOVAL & INSTALLATION. Reconnect negative battery cable. Turn ignition switch to ON
position and wait at least 30 seconds. Check fuse No. 22. If fuse No. 22 is okay, replace SRS unit. If fuse
No. 22 is blown, short to ground exists in dashboard wire harness or fuse No. 22 circuit. Replace
dashboard wire harness. If problem persists, replace instrument panel fuse/relay box.

4. Disable air bag system. See DISABLING SYSTEM under DISABLING & ACTIVATING AIR BAG

2004 Acura TSX

2004 ACCESSORIES/SAFETY EQUIPMENT Acura - Air Bag Restraint Systems

SYSTEM. Access and disconnect SRS unit connector "A". See SRS UNIT under REMOVAL &
INSTALLATION. Reconnect negative battery cable. Connect voltmeter between ground and SRS unit
connector "A", terminal No. 18. Turn ignition switch to ON position and measure voltage. If battery
voltage is present, check connection between SRS unit connector "A" and SRS unit. If connection is
okay, replace SRS unit. If battery voltage is not present, go to next step.

5. Turn ignition switch to OFF position. Disconnect instrument panel fuse/relay box connector "S". See Fig.

37 . Measure resistance between instrument panel fuse/relay box connector "S", terminal No. 2 and SRS
unit connector "A", terminal No. 18. If resistance is 0-1 ohm, check connections between fuse/relay box
connector "S" and instrument panel fuse/relay box. If connection is okay, replace instrument panel fuse
box. If resistance is more than one ohm, replace dashboard wire harness.

6. Disconnect SRS main harness connector C801. See Fig. 33 . Measure resistance between SRS main

harness connector terminal No. 2 and SRS main harness C803, terminal No. 18. If resistance is 0-1 ohm,
replace SRS main subharness. If resistance is more than one ohm, replace SRS main harness.

WIRING DIAGRAMS

2004 Acura TSX

2004 ACCESSORIES/SAFETY EQUIPMENT Acura - Air Bag Restraint Systems