1996 ACURA RL KA9 heater

Troubleshooting
Diagnostic Troubl e Cod e (DTC ) Char t (cont'd )
DTC(MI L indication )
P0139 (63)*2
P014 1 (65 )
P0153 (61)*2
P015 4 (1 )
P015 5 (41 )
P017 1 (46)*
2
P017 2 (46)*2
P017 4 (45)*2
P017 5 (45)*2
P030 0
P0325 (53 )
P033 0 (23 )
Detection Ite m
Secondar y Heate d Oxyge n Senso r(Secondar y H02S ) Slo w Respons e
(Sensor 2 )
Secondar y Heate d Oxyge n
Senso r (Secondar y HO2S ) Heate r
Circui t Malfunctio n (Senso r 2 )
Lef t Primar y Heate d Oxyge n
Senso r (Lef t Primar y HO2S ) Slo w
Respons e (Ban k 2 , Senso r 1 )
Lef t Primar y Heate d Oxyge n
Senso r (Lef t Primar y HO2S )
Heater Syste m Malfunctio n
Left Primar y Heate d Oxyge n
Sensor (Lef t Primar y H02S )
Heate r Circui t Malfunctio n (Ban k
2 , Senso r 1 )
Fue l Syste m To o Lea n [Righ t
Ban k (Ban k 1) ]
Fue l Syste m To o Ric h [Righ t Ban k
(Ban k 1) ]
Fue l Syste m To o Lea n [Lef t Ban k
(Ban k 2) ]
Fue l Syste m To o Ric h [Lef t Ban k
(Ban k 2) ]
Rando m Misfir e
Right Knoc k Senso r (Ban k 1 )Circui t Malfunctio n
Left Knoc k Senso r (Ban k 2 )Circui t Malfunctio n
Probable Caus e
• Secondar y H02 S (Senso r 2 )
• Ope n o r shor t i n Secondar y H02 S
(Senso r 2 ) heate r circui t
• PC M
• Lef t Primar y H02 S (Ban k 2 , Senso r 1 )
• Exhaus t syste m
• Ope n i n Lef t Primar y H02 S (Ban k 2 ,
Senso r 1 ) circui t
• Lef t Primar y H02 S (Ban k 2 , Senso r 1 )
• PC M
• Ope n o r shor t i n Lef t Primar y HO2 S
(Ban k 2 , Senso r 1 ) heate r circui t
• PC M
• Fue l suppl y syste m
• Righ t Primar y H02 S (Ban k 1 , Senso r 1 )
• MA P senso r
• Contaminate d fue l
• Valv e clearanc e
• Exhaus t leakag e
• Fue l suppl y syste m
• Righ t Primar y HO2 S (Ban k 1 , Senso r 1 )
• MA P senso r
• Contaminate d fue l
• Valv e clearanc e
• Fue l suppl y syste m
• Lef t Primar y H02 S (Ban k 2 , Senso r 1 )
• MA P senso r
• Contaminate d fue l• Exhaus t leakag e
• Fue l suppl y syste m
• Lef t Primar y H02 S (Ban k 2 , Senso r 1 )
• MA P senso r
• Contaminate d fue l
• Ignitio n syste m
• Fue l suppl y syste m
• MA P senso r
• EG R syste m
• Contaminate d fue l• Lac k o f fue l
• Ope n o r shor t i n Righ t Knoc k Senso r
(Ban k 1 ) circui t
• Righ t Knoc k Senso r (Ban k 1 )
• PC M
• Ope n o r shor t i n Lef t Knoc k Senso r
(Bank 2 ) circui t• Lef t Knoc k Senso r (Ban k 2 )• PC M
Page
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*2: Thes e DTC s requir e tw o "trips " o r tw o drivin g cycle s unles s th e SC S servic e connecto r i s connected .
11-90
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ProCarManuals.com

The HDS or the scan tool indicates Diagnostic Trouble Code (DTC) P0133: A slow response problem in the Right

Primary Heated Oxygen Sensor (Right Primary H02S) (Bank 1, Sensor 1) circuit.

The HDS or the scan tool indicates Diagnostic Trouble Code (DTC) P0153: A slow response problem in the Left

Primary Heated Oxygen Sensor (Left Primary HO2S) (Bank 2, Sensor 1) circuit.

Description

By controlling the air/fuel ratio with a Primary HO2S (Sensor 1) and a Secondary HO2S (Sensor 2), the deterioration of the

Primary H02S (Sensor 1) can be evaluated by its feedback period. When the feedback period of the H02S exceeds a certain

value during stable driving conditions, the sensor will be judged as deteriorated. When deterioration has been detected dur-

ing two consecutive trips, the MIL comes on and DTC P0133 or P0153 will be stored.

NOTE: If DTC P2195, P0134, P2297 and/or P0135 are stored at the same time as DTC P0133, troubleshoot those DTCs first,

then troubleshoot DTC P0133. If DTC P2197, P0154, P2298 and/or P0155 are stored at the same time as DTC P0153, trou-

bleshoot those DTCs first, then troubleshoot DTC P0153.

Possible Cause

• Primary HO2S (Sensor 1) Deterioration

• Primary H02S Heater (Sensor 1) Deterioration

• Exhaust system leakage
Primary Heated Oxygen Sensor (HO2S) (Sensor 1)

The Heated Oxygen Sensors (HO2S) detect the oxygen content in the exhaust gas and signal the PCM. In operation, the

PCM receives the signals from the sensor and varies the duration during which fuel is injected. To stabilize the sensor's

output, the sensor has an internal heater. The Right Primary HO2S (Bank 1, Sensor 1) is installed in the right exhaust man-

ifold, and the Left Primary HO2S (Bank 2, Sensor 1) is installed in the left exhaust manifold.ProCarManuals.com

The HDS or the scan tool indicates Diagnostic Trouble Code (DTC) P0134: Right Primary Heated Oxygen Sensor

(Right Primary HO2S) (Bank 1, Sensor 1) heater system malfunction.

The HDS or the scan tool indicates Diagnostic Trouble Code (DTC) P0154: Left Primary Heated Oxygen Sensor

(Left Primary H02S) (Bank 2, Sensor 1) heater system malfunction.

The MIL has been reported on.

DTC P0134 and/or P0154 are

stored.

Problem verification:

1. Do the PCM Reset Procedure.

2. Start the engine. Hold the

engine at 3,000 rpm with no

load (in Park or neutral) until

the
radiator
fan
comes
on.

Is DTC P0134 and/or P0154

indicated?

YES

Check for an open in the HO2S:

1. Turn the ignition switch OFF.

2.
Disconnect
the
right primary

H02S (Bank 1, Sensor 1) or left

primary HO2S* (Bank2, Sen-

sor 1) connector.

3. Install a jumper wire on the

harness side of the right prima-

ry H02S (Bank 1,Sensor 1) or

left primary H02S*connector

between terminals No. 1 and

No. 2.

4. Turn the ignition switch ON (II).

5. Check the right primary HO2S

(Bank 1, Sensor 1) or left pri-

mary HO2S*(Bank2, Sensorl)

output voltage with the HDS

or the scan tool.

Is there 1.5 V or more?

YES

Check for an open in the wires

(PHO2S line):

1. Turn the ignition switch OFF.

2. Install a jumper wire on the

PCM connector between D19,

orD18*andD22.

3. Turn the ignition switch ON (II).

4. Check the right primary H02S

(Bank 1, Sensor 1) or left pri-

mary H02S* (Bank 2, Sensor 1)

output voltage with the HDS

or the scan tool.

Is there 1.5 V or more?

YES
NO
Intermittent failure, system is OK

at this time. Check for poor con-

nections or loose terminals at

C251, C254 (located at right shock

tower), C119 (right primary H02S

(Bank 1, Sensor 1)) or C126 (left

primary H02S (Bank 2, Sensor 1))*

and
PCM.

Replace the HO2S.

Repair open in the wire between

PCM (019 or D18*) and right pri-

mary HO2S (Bank 1, Sensor 1) or

left primary HO2S* (Bank 2,

Sensor 1).

Substitute a known-good PCM and

recheck. If symptom/indication

goes away, replace the original

PCM.ProCarManuals.com

Fuel Supply System

The HDS or the scan tool indicates Diagnostic Trouble Code (DTC) P0171: The fuel system is too lean [Right

Bank (Bank 1)].

The HDS or the scan tool indicates Diagnostic Trouble Code (DTC) P0172: The fuel system is too rich [Right

Bank (Bank 1)].

The HDS or the scan tool indicates Diagnostic Trouble Code (DTC) P0174: The fuel system is too lean [Left Bank

(Bank 2)].

The HDS or the scan tool indicates Diagnostic Trouble Code (DTC) P0175: The fuel system is too rich [Left Bank

(Bank 2)].

Description

By monitoring the Long Term Fuel Trim, long term malfunctions in the fuel system will be detected.

If a
malfunction
has
been detected
during
two
consecutive
trips,
the MIL
will
come
on and DTC
P0171,
P0172, P0174

and/or P0175 will be stored.

NOTE: If some of the DTCs listed below are stored at the same time as DTC P0171, P0172, P0174 and/or P0175, trou-

bleshoot those DTCs first, then troubleshoot DTC P0171, P0172, P0174 and/or P0175.

P0107, P0108, P1128, P1129: MAP Sensor

P0135: Right Primary HO2S Heater (Bank 1, Sensor 1)

P0137, P0138: Secondary HO2S (Sensor 2)

P0141: Secondary HO2S Heater (Sensor 2)

P0155: Left Primary H02S Heater (Bank 2, Sensor 1)

P0401: EGR Flow Insufficient

P0404: EGR Valve Lift Insufficient

P0406: EGR Valve Position Sensor High Voltage

Possible Cause

Fuel Pump insufficient flow/pressure

Fuel Feed Line clogged, leaking

Fuel Pressure Regulator stuck open

Fuel Filter clogged

Injector clogged, air inclusion

Gasoline doesn't meet Owner's Manual spec.

Primary H02S (Sensor 1) deteriorated

EGR System insufficient flow

Exhaust leak

Fuel Pressure Regulator clogged, stuck closed

Fuel Return Pipe clogged

Injector leaking

Gasoline doesn't meet Owner's Manual spec.

Primary HO2S (Sensor 1) deteriorated

EGR System malfunction (too much flow)

EVAP Canister Purge Valve leaking, stuck opened

(cont'd)ProCarManuals.com

Front Seat
Disassembl y
SRS component s ar e locate d i n thi s area . Revie w th e SR S componen t locations , precautions , an d procedure s i n th e SR S
sectio n befor e performin g repair s o r service . Refe r t o th e
'99 - 0 1 Acur a 3. 5 R L Servic e Manual , P/ N 61SZ305 .
CAUTION :
• Pu t o n glove s t o protec t you r hands .
• Whe n pryin g wit h a flat-ti p screwdriver , wra p it wit h protectiv e tap e t o preven t damage .
8-wa y powe r adjustabl e (wit h powe r lumba r suppor t an d sea t heater) :
NOTE:
Take car e no t t o tea r th e seam s o r damag e th e sea t covers .
Refe r t o pag e 20- 8 fo r th e sea t harnes s wirin g locations . Rout e th e sea t wir e harnes s correctly .
Mak e sur e th e bushin g an d pivo t washe r ar e installe d correctly .
Appl y multipurpos e greas e t o th e movin g portio n o f th e sea t track .
T o preven t wrinkle s i n th e seat-bac k cover , stretc h th e materia l evenl y ove r th e pad .
ProCarManuals.com

Seat Harness Wiring Locations

NOTE: When assembling the front seat, make sure the

seat harness and connectors are fastened correctly.

8-way power adjustable (with power lumbar support

and seat heater):

SEAT-BACK

WIRE TIES

SIDE AIRBAG

HARNESS
POWER

LUMBAR

SUPPORT

MOTOR

SEAT-BACK

HEATER

HARNESS

[C] [A] [B]

[D]

POWER LUMBAR SUPPORT

SUBHARNESS

HOOK

SEAT

CUSHION

COVER

To seat belt

buckle.
To power

seat

switch.

HOOK

POWER

LUMBAR

SUPPORT

CONNECTOR

To seat

cushion

heater.

20-8
SEAT-BACK

HEATER

CONNECTORProCarManuals.com

Engine Hos e Connections :
HEATERHOSES
FAS T IDL E THERM O
VALV E
HEATE RVALVE
WATE R BYPAS S
HOSE S
IDL E AI R
CONTRO L
VALV E
THERMOSTA THOUSING
REAR WATE R
OUTLE T
AT F COOLE R
HOSE S
Refe r t o sectio n 1 4
whe n installing .
ATF COOLE RLINES
COOLAN TRESERVOI R
ProCarManuals.com

PGM-FI System

How to Set Readiness Codes (cont'd)

HO2S Monitor

NOTE:

• Do not turn the ignition switch OFF.

• When the battery negative cable is disconnected, all

readiness codes are cleared.

Required condition ('96 - 97 models):

• Ambient temperature between 32 - 95°F (0 - 35°C).

• Altitude below 2,400 m (7,874 ft.).

Required condition ('98 - 01 models):

Ambient temperature between 20 - 95°F (-7 - 35°C).

1. Connect the scan tool to the Data Link Connector

(DLC).

2. Start the engine, and hold it at 3,000 rpm with no

load (in Park or neutral) until the radiator fan comes

on.

3. Let the engine idle for 5 seconds.

4. Drive at a steady speed between 50 - 62 mph (80 -

100 km/h) for about 2 minutes.

5. With the A/T in D4 position, decelerate from 62 mph

(100 km/h) by completely releasing the throttle for

at least 5 seconds. If the engine is stopped during

this procedure, go to step 4 and do the procedure

again.

6. Check for the readiness code with the scan tool.

HO2S Heater Monitor

NOTE: When the battery negative cable is disconnected,

all readiness codes are cleared.

1. Connect the scan tool to the Data Link Connector

(DLC).

2. Start the engine, and let the engine idle for 10 min-

utes.

3. Check for the readiness code with the scan tool.ProCarManuals.com