Service Bulletin

Service Bulletin
Applies To:
14-002
January 18, 2014
See VEHICLES AFFECTED
MIL Is On With DTC P0420 or P0430
SYMPTOM
The MIL is on with DTC P0420 or DTC P0430 (catalyst
system efficiency below threshold) with a possible DTC
P2243 or DTC P2247 (A/F sensor 1 circuit high
voltage).
PARTS INFORMATION
POSSIBLE CAUSE
One or both primary A/F Sensor (Air Fuel Ratio) caps
may have fallen off and bored a hole through the
affected WU-TWC (Warm Up Three Way Catalyst).
EGR Pipe Upper Gasket (front WU-TWC replacement):
P/N 18716–R70–A01
VEHICLES AFFECTED
2010 MDX:
From VIN 2HNYD2...AH518583 thru
2HNYD2...AH521143
2010 TL 2WD:
From VIN 19UUA8...AA018467 thru
19UUA8...AA019599
2010 TL AWD:
From VIN 19UUA9...AA006991 thru
19UUA9...AA007357
2010 ZDX:
From VIN 2HNYB1...AH503166 thru
2HNYB1...AH503413
Lower WU-TWC Gasket:
P/N 18212–SA7–003
CORRECTIVE ACTION
Replace the affected primary A/F sensor and
WU-TWC, then find the missing A/F sensor cap from
the under floor TWC.
MDX
Castle Nut (rear WU-TWC replacement):
P/N 90365–STX–A00
All Models
EGR Pipe Lower Gasket (front WU-TWC replacement):
P/N 18719–R70–A01
Front Primary A/F Sensor:
P/N 36531–R70–A02
Rear Primary A/F Sensor:
P/N 36541–R70–A01
Self-Locking Nut (8 mm) (four required):
P/N 90212–RCA–A01
Self-Locking Nut (10 mm) (12 required):
P/N 90212–SA5–003
Spindle Nut (rear WU-TWC replacement):
P/N 90305–S3V–A11
Upper WU-TWC Gasket:
P/N 18115–R70–A01
Cotter Pin (rear WU-TWC replacement):
P/N 90701–S3V–A01
Front WU-TWC:
P/N 18190–RYE–A10
Intermediate Shaft Snap-Ring
(rear WU-TWC replacement):
P/N 44319–STX–A60
Rear WU-TWC:
P/N 18290–RYE–A10
Under Floor TWC Gasket:
P/N 18393–SJA–A01
 2014 American Honda Motor Co., Inc. – All Rights Reserved
BTB 50579 (1401)
1 of 10
CLIENT INFORMATION: The information in this bulletin is intended for use only by skilled technicians who have the proper tools, equipment, and
training to correctly and safely maintain your vehicle. These procedures should not be attempted by “do-it-yourselfers,” and you should not assume this
bulletin applies to your vehicle, or that your vehicle has the condition described. To determine whether this information applies, contact an authorized
Acura automobile dealer.
TL
Castle Nut (rear WU-TWC replacement):
P/N 90363–TK4–A01
ZDX
Castle Nut (rear WU-TWC replacement):
P/N 90365–STX–A00
Cotter Pin (rear WU-TWC replacement):
P/N 94201–30220
Cotter Pin (rear WU-TWC replacement):
P/N 90701–S3V–A01
Check Bolt (M/T):
P/N 90442–397–000
Drain Washer (rear WU-TWC replacement):
P/N 90471–PX4–000
Drain Washer (A/T) (rear WU-TWC replacement):
P/N 90471–PX4–000
Fill Washer (rear WU-TWC replacement):
P/N 90441–PK4–000
Drain Washer (M/T) (rear WU-TWC replacement):
P/N 94109–20000
Front WU-TWC:
P/N 18190–RYE–A10
Fill Washer (A/T) (rear WU-TWC replacement):
P/N 90441–PK4–000
Intermediate Shaft Snap-Ring
(rear WU-TWC replacement):
P/N 44319–STX–A60
Fill Washer (M/T) (rear Wu-TWC replacement):
P/N 94109–20000
Front WU-TWC (2WD):
P/N 18190–R70–A10
Front WU-TWC (AWD):
P/N 18190–RK2–A00
Intermediate Shaft Snap-Ring (A/T)
(rear WU-TWC replacement):
P/N 44319–SD4–010
Intermediate Shaft Snap-Ring (M/T)
(rear WU-TWC replacement):
P/N 44319–STX–A60
Rear WU-TWC (2WD):
P/N 18290–R70–A00
Rear WU-TWC (AWD):
P/N 18290–RK2–A00
Rear WU-TWC:
P/N 18290–RYE–A10
Under Floor TWC Gasket:
P/N 18393–SJA–A01
REQUIRED MATERIALS
Moly 60 Paste:
P/N 08734-0001
High Temp Urea Grease:
P/N 08798-9002
ATF fluid (4 quarts):
P/N 08200–9008A
M/T fluid (3 quarts):
P/N 08798–9031A
Under Floor TWC Gasket (2WD):
P/N 18393–SDB–A00
TOOL INFORMATION
Ball Joint Remover:
T/N 07MAC-SL0A102
Under Floor TWC Gasket (AWD):
P/N 18302–SP0–003
Ball Joint Thread Protector:
T/N 071AF-SZVA000
O2 Sensor Socket Wrench (commercially available):
2 of 10
14-002
WARRANTY CLAIM INFORMATION
The normal warranty applies.
2. Remove the primary A/F sensor located on top of
the affected catalytic converter. For example: If
DTC P0420 is stored remove the rear (bank one)
primary A/F sensor.
MDX
OP#
Description
FRT
1201K5
Procedure A-Replace the front WUTWC, primary A/F sensor, and check
the TWC for cap (includes diagnosis).
2.4 hr
1201K6
Procedure B-Replace the rear WUTWC, primary A/F sensor, and check
the TWC for cap (includes diagnosis
and alignment).
1.6 hr
3. Check for a missing cap from the primary A/F
sensor.
TL
OP#
Description
FRT
1201K5
Procedure A-Replace the front WUTWC, primary A/F sensor, and check
the TWC for cap (diagnosis included).
1.3 hr
1201K6
Procedure B-Replace the rear WUTWC, primary A/F sensor, and check
the TWC for cap (includes diagnosis
and alignment).
1.9 hr
ZDX
OP#
Description
FRT
1201K5
Procedure A-Replace the front WUTWC, primary A/F sensor, and check
the TWC for cap (includes diagnosis).
1.3 hr
1201K6
Procedure B-Replace the rear WUTWC, primary A/F sensor, and check
the TWC for cap (includes diagnosis
and alignment).
1.9 hr
Failed Part:
P/N 36541–R70–A01
Defect Code:
07801
Symptom Code:
03203
Skill Level:
Repair Technician
DIAGNOSIS
1. Connect the HDS to the vehicle and check for
DTCs P0420 or P0430.
NOTE: In addition to DTCs P0420 or P0430, you
may also see DTCs P2243 or P2247 stored; the
A/F sensor tip may have broken off the A/F sensor.
• If DTC P0430 is stored and the cap is missing
from the front (bank two) primary A/F sensor, go
to REPAIR PROCEDURE A
• If DTC P0420 is stored and the cap is missing
from the rear (bank one) primary A/F sensor go,
to REPAIR PROCEDURE B.
• If the cap is not missing, this bulletin does not
apply. Continue with normal troubleshooting.
14-002
3 of 10
ELECTRONIC SERVICE MANUAL PROCEDURES
The following procedures have been used in full or in
part within this service bulletin. For more detail on
them, and torque specifications for some components,
refer to the appropriate electronic service manual.
• Condenser Fan Removal/Installation
• A Pipe Removal/Installation
• Driveshaft Removal/Installation
• Warm Up TWC Removal/Installation
• Under Floor TWC Removal/Installation
3. Disconnect the 4P connector and remove the
harness clamps securing the front WU-TWC
secondary A/F sensor harness.
A/F 4P
CONNECTOR
REPAIR PROCEDURE A
1. Remove the engine cover.
ENGINE COVER
HARNESS
CLAMPS
4. Remove the front secondary A/F sensor.
CLIPS
2. If not already disconnected, disconnect the 4P
connector and remove the front primary
A/F sensor.
SECONDARY
A/F SENSOR
44 N.m (33 lb-ft)
CONNECTOR
PRIMARY A/F
SENSOR
44 N.m (33 lb-ft)
4 of 10
14-002
5. Remove the EGR pipe.
7. Remove the No. 5 ignition coil and the ignition coil
heat insulator.
GASKET
Replace.
6 x 1.0 mm
NO.5
IGNITION
COIL
EGR PIPE
12 N.m
(8.7 lb-ft)
MOUNTING NUTS
22 N.m (16 lb-ft)
IGNITION
COIL HEAT
INSULATOR
GASKET
Replace.
8. Raise the vehicle.
6. If necessary, remove the A/C condenser fan shroud
assembly.
NOTE: Place an appropriate size piece of
cardboard in front of the radiator that protects the
radiator from damage when removing the front
catalytic converter.
BOLTS
7 N.m
(5 lb-ft)
CONDENSER FAN
SHROUD ASSEMBLY
14-002
5 of 10
9. Remove the front subframe stiffener.
MDX/ZDX:
10. Remove the exhaust pipe hangers, then remove
the exhaust pipe A.
GASKET
GASKETS
Replace.
Replace.
EXHAUST
PIPE A
SELF-LOCKING NUTS
10 x 1.25 mm
33 N·m (25 lb-ft)
Replace.
SELF-LOCKING NUTS
BOLTS
10 x 1.25 mm
54 N·m (40 lb-ft)
Replace.
54 N.m (40 lb-ft)
TL:
11. Remove the front WU-TWC.
NEW
GASKET
NEW FRONT
WU-TWC
ASSEMBLY
BOLTS (5)
SUBFRAME
STIFFENER
54 N.m (40 lb-ft)
Replace.
FRONT WU-TWC
BRACKET
NEW SELFLOCKING
NUTS
31 N.m
(23 lb-ft)
22 N.m
(16 lb-ft)
12. Go to UNDER FLOOR TWC and check for the
missing primary A/F sensor cap.
6 of 10
14-002
REPAIR PROCEDURE B
1. Remove the engine cover.
4. Remove the front subframe stiffener.
MDX/ZDX:
ENGINE COVER
2. Disconnect the connector and remove the rear
primary A/F sensor.
BOLTS
54 N.m (40 lb-ft)
TL:
BOLTS (5)
CONNECTOR
SUBFRAME
STIFFENER
54 N.m (40 lb-ft)
Replace.
PRIMARY A/F SENSOR
44 N.m (33 lb-ft)
3. Raise the vehicle.
14-002
7 of 10
5. Remove the rear secondary A/F sensor.
8. MDX and ZDX: Remove the brake hose mounting
bolt from the right damper.
BRAKE HOSE
MOUNTING BOLT
CLIPS
22N.m (16 lb-ft)
BRAKE
HOSE
9. TL only: Remove the ABS bracket from the
damper.
TL only:
ABS BRACKET
SECONDARY
A/F SENSOR
44 N.m (33 lb-ft)
6. Remove the right front wheel.
7. Remove the exhaust pipe hangers then remove the
exhaust pipe A.
GASKET
GASKETS
Replace.
Replace.
EXHAUST
PIPE A
BOLT
9.8 N.m (7.2 lb-ft)
10. TL only: Remove the brake line bracket from the
damper.
TL only:
BOLT
SELF-LOCKING NUTS
10 x 1.25 mm
33 N·m (25 lb-ft)
Replace.
BRAKE LINE
BRACKET
8 x 1.25 mm
22 N.m (16 lb-ft)
SELF-LOCKING NUTS
10 x 1.25 mm
54 N·m (40 lb-ft)
Replace.
8 of 10
14-002
11. TL only: Remove the right damper fork.
TL only:
BOLT
10 x 1.25 mm
49 N.m (36 lb-ft)
14. Remove the right driveshaft.
NOTE: Drive the inboard joint off the intermediate
shaft using a drift and hammer. Do not pull on the
driveshaft or the inboard joint may come out.
DRIVESHAFT
INBOARD
JOINT
15. Remove the set ring from the intermediate shaft.
NUT
10 x 1.25 mm
64 N.m (47 lb-ft)
Replace.
BOLT
Replace.
12. Separate the right lower ball joint.
SET RING
LOCK PIN
CASTLE NUT
103 - 113 N.m
(75.9 - 83.2 lb-ft)
Replace.
BALL JOINT
REMOVER, 32 mm
07MAC-SL0A102
BALL JOINT THREAD
PROTECTOR, 14 mm
071AF-S3VA000
16. TL and ZDX: Drain the transmission fluid.
17. TL and ZDX: Remove the intermediate shaft from
the differential.
NOTE: Hold the intermediate shaft horizontal until it
is clear of the differential to prevent damaging the
oil seal.
OIL SEAL
13. Remove the spindle nut.
FLANGE BOLT
39 N.m (29 lb-ft)
SET RING
Replace.
DOWEL BOLTS
SET RING
GROOVE
INTERMEDIATE
SHAFT
39 N.m (29 lb-ft)
14-002
9 of 10
18. Remove the rear WU-TWC exhaust pipe bracket.
UNDER FLOOR TWC
1. Remove the under floor TWC.
GASKET
Replace.
EXHAUST
PIPE
HANGERS
EXHAUST PIPE
BRACKET
BOLTS
8 x 1.25 mm
22 N.m (16 lb-ft)
NEW
SELFLOCKING
NUTS
33 N.m
(25 lb-ft)
19. Remove the rear WU-TWC.
GASKET
UNDER-FLOOR
TWC ASSEMBLY
Replace.
SELFLOCKING
NUTS
GASKET
Replace.
2. Search the under floor TWC for the missing primary
A/F sensor cap and remove it.
Replace.
31 N.m
(23 lb-ft)
3. Install all parts in the reverse order of removal.
4. Check wheel alignment and adjust if necessary.
REAR
WU-TWC
ASSEMBLY
22 N.m
(16 lb-ft)
Replace.
REAR
WU-TWC
BRACKET
20. Go to UNDER FLOOR TWC and check for the
missing A/F sensor cap.
10 of 10
14-002