Page 1697 of 2103
ABS
Code No. 15 Wheel speed sensor system
[Comment]l Malfunction of wheel speed sensorThis diagnostic trouble code is output when there i s a malfunction (other than brokenl wire or short circuit) in any of the wheel speed sensor output signals while driving.
l A B S r o t o r
The following can be considered as the cause of the wheel speed sensor output
l Malfunction of wheel
malfunction.l Malfunction of ABS-ECU
l Distortion of rotor, teeth missing
lLow frequency noise interference when sensor harnes s wire is broken.l Noise interference in sensor signallSensor output signal is below the standard value or amplitude modulation is overthe standard value. Using an oscilloscope to measur e the wave shape of the
wheel speed sensor output signal is very effective.
l Broken sensor harness
l Poor connection of connector
N G Repair
(Refer to
N G Repair
Replace the ABS-ECU.
Revision
Page 1698 of 2103
![MITSUBISHI SPYDER 1990 Service Repair Manual ABS Troubleshooting
Code No. 16 Power supply system
[Comment]lMalfunction of wiring harness or connector,
This diagnostic trouble code is output when the ABS -ECU power voltage is outside
l MITSUBISHI SPYDER 1990 Service Repair Manual ABS Troubleshooting
Code No. 16 Power supply system
[Comment]lMalfunction of wiring harness or connector,
This diagnostic trouble code is output when the ABS -ECU power voltage is outside
l](/manual-img/19/57345/w960_57345-1697.png)
ABS Troubleshooting
Code No. 16 Power supply system
[Comment]lMalfunction of wiring harness or connector,
This diagnostic trouble code is output when the ABS -ECU power voltage is outside
l Malfunction of battery or generator’
the standard value. Furthermore, if the voltage ret urns to normal, this diagnostic
l Malfunction of ABS-ECU
trouble code will not be output.
Caution
If the battery voltage drops during check, this cod e will be output as a current
and correct
diagnostic of the problem cannot be made.
Before carrying out the following check, check the battery condition;
Measure at the ABS-ECU connector
l
OK
5 4 9 , and
NG Repair. .
Check the or
. N G Check the following connector:
OK
Check trouble symptoms Replace ABS-ECU.
Code No. Wheel speed sensor gap
or short circuit
[Comment]l Improper installation of wheel speed sensor
These diagnostic trouble codes are output when the detection speed of the wheellMalfunction of wheel speed sensor (intermittent ope nspeed sensors is below the standard value.
circuit or short circuit)lMalfunction of ABS rotor (chipped tooth or rotor notinstalled)l Noise interference in wheel speed sensor
l Malfunction of ABS-ECU ,
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NOTE
1. Momentary interruptions within approximately 100 ms are not detected.
2. To inspect the twisted pair wires in the wheel s peed sensor, check if there is
cables, and flex the cables to check for any open c ircuits.
NG Repair
(Refer to
NGWheel speed sensor checkReplace the wheel speed sensor.check(Refer to(Refer to
Wheelspeedsensorbody-side harness
Page 1699 of 2103
ABS
Code No. 38 Stop light switch system
[Comment]
The ABS-ECU outputs this diagnostic trouble code in the following cases.l Malfunction of stop light switch Malfunction of or lStop light switch remains on for more than 15 minutes while the ABS is . M a l f u n c t i o n ing.l The harness wire for the stop light switch may be o pen-circuited.If the stop light operates normally, there is an open circuit in the harness for the
stop light switch input circuit or there is a malfu nction in the ABS-ECU.
Yes
Stop light switch check (Refer to
GROUP On-vehicle Service.) Replace the
Measure at ABS-ECU connector l
Disconnect the connector and mea-
sure at the harness side.
l Stop light switch: ON
lVoltage between terminal 29 and body
ground
OK Battery positive
OK
Check the following connector:
l
OK
Check trouble symptom.
NG Repair
NG Replace the ABS-ECU.
Revision
Page 1700 of 2103
ABS
Code No. Solenoid valve system
[Comment]l Malfunction of hydraulic unitThe ABS-ECU normally the solenoid valve drive circuit.
If no current flows in the solenoid even if ECU turns the solenoid ON or itl continues to flow even when turned OFF, the ECU det ermines the solenoid coil wireis broken/short-circuited or the harness is broken/ short-circuited, and then thesediagnostic trouble codes are output.
Measure at hydraulic unit connector l Disconnect the connector and Replace the hydraulic unit.
sure at the hydraulic l Resistance value between terminals
7-3, 7-5 and 7-6.
O K
NGMeasure at ABS-ECU connector l Disconnect the connector and mea-
sure at the harness side
l Resistance value between terminals
22-17. 22-19 and
Check the following NG Repair
OK
Check trouble symptom.NG Replace the ABS-ECU.
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Page 1701 of 2103
![MITSUBISHI SPYDER 1990 Service Repair Manual Code No. 51 Valve Probable cause
[Comment] of ABS valve relayWhen the ignition switch is turned ON, the ABS-ECU switches relay OFF Malfunction of harness or and ON for an initial c MITSUBISHI SPYDER 1990 Service Repair Manual Code No. 51 Valve Probable cause
[Comment] of ABS valve relayWhen the ignition switch is turned ON, the ABS-ECU switches relay OFF Malfunction of harness or and ON for an initial c](/manual-img/19/57345/w960_57345-1700.png)
Code No. 51 Valve Probable cause
[Comment] of ABS valve relayWhen the ignition switch is turned ON, the ABS-ECU switches relay OFF Malfunction of harness or and ON for an initial check, compares the voltage of the signal to the valve relay
l Malfunction of hydraulic unit and valve power monitor line voltage to. check whet her the valve relay is
l Malfunction of ABS-ECUnormal.In addition, normally it monitors whether or not th ere is power in the valvepower monitor line since the valve relay is normall y ON.
If the supply of power,to the valve power monitor line is interrupted, thi s diagnostic trouble code will beoutput.
A B S v a l v e r e l a y c h e c k ( R e f e r t oReplace, the ABS valve
Measure at hydraulic unit connector l Disconnect the connector and
lVoltage between terminal 12 and body
Repair
OK N G
Measure at ABS-ECU connector
l Disconnect the connector and mea-
sure at the harness side.
l Resistance value between terminals
OK
) R e p a i r
,
2 27
O K Check trouble symptom.
OK
l Disconnect the connector and
l
. NG Repair
OK
Check trouble symptom. Replace the ABS-ECU.
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Page 1702 of 2103
Code No. 53 Motor relay, motor system
[Comment]The ABS-ECU outputs this diagnostic trouble code for the motor relay and motor
in the following cases.
lWhen motor relay is ON and no signal is input to th e motor monitor line (when
motor is not operating, etc.)
l
5 seconds or more (when motor continues operating, etc.)
l When the motor relay does not function
ABS motor relay check (Refer to
Inspect the harness between fusible
link No. 8 and the hydraulic unit.
Measure at ABS-ECU connector
l Disconnect the connector and Check the following l
NG,
OK
Check trouble
NG
Check the harness thehydraulic unit and ABS-ECU. Repair,if
l Disconnect the connector and
Revision
.
Repair.
OK
Check trouble symptom.NG Replace the ABS-ECU.
Page 1703 of 2103
ABS Troubleshooting
ABS WARNING LIGHT CHECK’
.
Check that the ABS warning light as-
1. When the ignition switch is turned
warning light illuminates..
2. When the ignition switch is turned to “START”, t
o
the engine, the ABS warning light
1 second.
3. If the is other’ above, check
diagnostic trouble codes.
Revision
Page 1704 of 2103

6ABS
INSPECTION CHART FOR TROUBLE SYMPTOMS35201140074
Get an understanding of the trouble symptoms and check according to the inspection
Trouble symptom InspectionReference
p a g e
C o m m u n i c a t i o n w i t h s c a n C o m m u n i c a t i o n w i t h a l l s y s te m s i s n o t p o s s i b l e . 1
tool is not possible.
Communication with is not possible.2 __
When the ignition key is turned to “ON” (engine ABS warning light3
does not illuminate.
After the engine starts, the ABS warning light rema ins illuminated.
When the ignition key is turned to “START”, the ABS warning light 5
not illuminate.
After the ignition key is turned to “ON”, the ABS warning light blinks once, and6
when turned to “START”, it illuminates. When return ed to “ON”, the light flashes
once, and then switches off.
Faulty ABS operation Unequal braking power on both s ides7
Insufficient braking power
ABS operates under normal braking conditions
ABS operates before vehicle stops under normal
braking conditions
Large brake pedal vibration (Caution 2.)
Caution
1.if steering movements are made when driving at high speed, or when driving on road surfaces
with low frictional resistance, or when passing over bumps, the ABS may operate even though
sudden braking is not being applied. Because of thi s, when getting information from the customer,
check if the occurred driving under such conditions as these.
2.During ABS operation, changes in the feeling of the brake (vibration may occur or
may not be able to be depressed). Such changes are due to intermittent changes in hydraulic
pressure inside the brake line to prevent the from locking, and is considered normal.
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