Acura RL (1996-2004 year). Manual — part 527
DTC 51: Motor Lock
When the vehicle starts, the
ABS indicator conies on.
With the SCS service connec-
tor connected (see page
), DTC 51 is indicated.
Problem verification:
1. Erase the DTC.
2. Test-drive the vehicle at 6 mph
(10 km/h) or more.
Does the ABS indicator come
on and is DTC 51 indicated?
Replace the modulator unit.
The system is OK at this time.
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Troubleshooting
DTC 52: Motor Stuck OFF
When the vehicle starts, the
ABS indicator conies on.
With the SCS service connec-
tor connected (see page
), DTC 52 is indicated.
Check the ABS MOTOR (40 A) fuse
in the under-hood fuse/relay box,
and reinstall the fuse if it is OK.
Is the fuse OK?
Check the ABS UNIT (7.5 A) fuse
in the under-hood fuse/relay box,
and reinstall the fuse if it is OK.
Is the fuse OK?
Check the pump motor relay (see
).
Is the relay OK?
Check the motor circuit:
Connect the pump motor relay
connector terminal No. 3 to No. 4
with a jumper wire for a moment.
Does the pump motor operate?
Check for an open in the MOTOR
circuit:
1. Disconnect the pump motor
connector.
2. Connect the pump motor
relay connector terminal No.
3 to No. 4 with a jumper wire.
3. Measure the voltage between
the pump motor connector
terminal No. 1 and body
ground.
Is there battery voltage?
Replace the fuse and recheck.
NOTE: Connect the pump motor relay
connector terminal No. 3 to No. 4 for a
moment, and recheck the fuse. If the fuse
is blown, check for a short to body
ground in the motor power source circuit.
Replace the fuse and recheck.
NOTE: Connect the pump motor relay
connector terminal No. 3 to No. 4 for a
moment, and recheck the fuse. If the
fuse is blown, check for a short to body
ground in the MCK circuit.
Replace the pump motor relay.
PUMP MOTOR RELAY CONNECTOR
Check the PMR circuit.
(To page
Repair open in the wire between
the under-hood fuse/relay box
and the pump motor.
Terminal side of female terminals
PUMP MOTOR CONNECTOR
JUMPER WIRE
Terminal side of female terminals
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Check for an open in the MOTOR
GND circuit:
Measure the voltage between the
pump motor connector terminal
No. 1 and No. 2.
Is there battery voltage?
PUMP MOTOR CONNECTOR
Terminal side of female terminals
Repair open in the wire between
the pump motor and body
ground.
Repair poor ground (G251).
Replace the modulator unit.
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Troubleshooting
DTC 52: Motor Stuck OFF (cont'd)
Check for an open in the PMR cir-
cuit:
1. Disconnect the ABS control
unit 12P connector.
2. Connect the pump motor relay
connector terminal No. 2 to
No. 4 with a jumper wire.
3. Measure the voltage between
the ABS control unit 12P con-
nector terminal No. 12 and
body ground.
Is there battery voltage?
Check for a short to power in the
PMR circuit:
1. Remove the jumper wire from
pump motor relay connector.
2. Start the engine.
3. Measure the voltage between
the ABS control unit 12P con-
nector terminal No. 12 and
body ground.
Repair open in the wire between
the under-hood fuse/relay box
and the ABS control unit.
Wire side of female terminals
Is there battery voltage?
Repair short to power in the wire
between the under-hood fuse/
relay box and the ABS control
unit.
If the problem occurs again,
replace the ABS control unit.
PUMP MOTOR RELAY CONNECTOR
JUMPER
WIRE
Terminal side of female terminals
ABS CONTROL UNIT 12P CONNECTOR
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