Mitsubishi Pajero Pinin. Manual — part 254
ABS <4WD> –
Troubleshooting
35B-7
Code No.16 ABS-ECU power supply system (abnormal
voltage drop or rise)
Probable cause
This code is output if the ABS-ECU power supply voltage drops below or rises
above the rated values.
Furthermore, turning the ignition switch to ACC will erase this code.
Malfunction of battery
Malfunction of wiring harness or connector
Malfunction of hydraulic unit and ABS-ECU
Caution
If battery voltage drops or rises during inspection, this code will be output as well. If the voltage
returns to standard value, this code is no longer output.
Before carrying out the following inspection, check the battery level, and refill it if necessary.
NG
Repair
NG
Replace the hydraulic unit and ABS-ECU.
NG
Repair
NG
Check the harness wire, and repair if necessary.
Between ignition switch and ABS-ECU
OK
Check the trouble symp-
tom.
OK
Check the trouble symp-
tom.
OK
Check the following connector: A-58
Measure at the ABS-ECU connector A-58.
Disconnect the connector, and measure at the harness side
connector.
Start the engine. Voltage between 32 and body earth
OK: System voltage
NG
Check the following connectors: A-58, C-40 <R.H. drive
vehicles>, C-02 <R.H. drive vehicles>, C-78 <L.H. drive vehicles>,
C-76 <R.H. drive vehicles>, C-74
ABS <4WD> –
Troubleshooting
35B-8
Code No.32 G sensor system
Probable cause
This code is output in the following cases.
G sensor output voltage is less than 0.5 V or more than 4.5 V. (An open or
short circuit is present in the G sensor circuit.)
G sensor output voltage does not change. (G sensor output voltage is abnormal.)
Malfunction of G sensor
Malfunction of wiring harness or connector
Malfunction of hydraulic unit and ABS-ECU
NG
Repair
NG
Check the harness wire, and repair if necessary.
Between ignition switch and G sensor
OK
OK
OK
Check the trouble symp-
tom.
Check the following connector: D-29
G sensor check
NG
NG
Repair
NG
Replace the hydraulic unit and ABS-ECU.
OK
Check the trouble symp-
tom.
Check the following connector: A-58
NG
Measure at the ABS-ECU connector A-58.
Disconnect the connector, and measure at the harness side
connector.
Ignition switch: ON
Voltage between 9 and 6
OK: 2.4 – 2.6 V (When labeled surface is faced to vertical
direction)
Replace
Measure at the G sensor connector D-29.
Disconnect the connector, and measure at the harness side
connector.
Ignition switch: ON
Voltage between 1 and body earth
OK: System voltage
NG
Repair
NG
Check the harness wire, and repair if necessary.
Between G sensor and ABS-ECU
OK
Check the trouble symp-
tom.
Check the following connectors: A-58, C-25 <L.H. drive
vehicles>, D-29
NG
OK
Code Nos.41, 42, 43 and 44 Solenoid valve
Probable cause
Code No.52 Valve relay problem (stays off)
Code No.53 Motor relay problem (stays off)
Code No.55 Motor system (seized pump motor)
These codes are output if there is an open circuit or short-circuit in the ABS-ECU
power supply circuit (power supply circuit for solenoid valve and motor), or the internal
circuit in the hydraulic unit and ABS-ECU is defective.
Malfunction of wiring harness or connector
Malfunction of hydraulic unit and ABS-ECU
NG
Repair
NG
Check the harness wire, and repair if necessary.
Between fusible link No.1 and ABS-ECU
NG
Repair
NG
Replace the hydraulic unit and ABS-ECU.
OK
Check the trouble symp-
tom.
Check the following connector: A-58
OK
OK
Check the trouble symp-
tom.
Check the following connectors: A-58, C-24 <R.H. drive
vehicles>
Measure at the ABS-ECU connector A-58.
Disconnect the connector, and measure at the harness side
connector.
Voltage between 34 and body earth, and between 12 and
body earth
OK: System voltage
NG
ABS <4WD> –
Troubleshooting
35B-9
INSPECTION CHART FOR TROUBLE SYMPTOMS
Trouble symptoms
Inspection procedure
No.
Reference page
Communication between the MUT-
II
and the whole system is not
possible.
1
–
Communication between the MUT-
II
and the ABS-ECU is not possible.
2
35B-10
When the ignition key is turned to “ON” (engine stopped), the ABS warning
lamp does not illuminate.
3
–
Even after the engine is started, the ABS warning lamp remains
illuminated.
4
35B-11
Faulty ABS operation
5
35B-12
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 this, when getting information from the customer,
check if the problem occurred while driving under such conditions as these.
2.
During ABS operation, the brake pedal may vibrate or may not be able to be depressed. Such
phenomena are due to intermittent changes in hydraulic pressure inside the brake line to prevent
the wheels from locking and is not an abnormality.
ABS <4WD> –
Troubleshooting
35B-10
INSPECTION PROCEDURE FOR TROUBLE SYMPTOMS
Inspection Procedure 2
Communication between MUT-
II
and the ABS-ECU is not
possible.
Probable cause
The cause may be an open circuit in the ABS-ECU power supply circuit or an open
circuit in the diagnosis output circuit.
Blown fuse
Malfunction of wiring harness or connector
Malfunction of hydraulic unit and ABS-ECU
NG
NG
NG
Repair
NG
Check the harness wire, and repair if necessary.
Between ABS-ECU and diagnosis connector
OK
NG
Repair
NG
Check the harness wire, and repair if necessary.
Between ignition switch and ABS-ECU
OK
NG
Repair
NG
Check the harness wire, and repair if necessary.
Between ABS-ECU and earth
NG
Repair
NG
Replace the hydraulic unit and ABS-ECU.
OK
Check the trouble symp-
tom.
OK
Check the trouble symp-
tom.
OK
Check the following connector: A-58
Measure at the ABS-ECU connector A-58.
Disconnect the connector, and measure at the harness side
connector.
Continuity between 33 and body earth, and between 11 and
body earth
OK: Continuity
Check the following connector: A-58
OK
Check the trouble symp-
tom.
Measure at the ABS-ECU connector A-58.
Disconnect the connector, and measure at the harness side
connector.
Ignition switch: ON
Voltage between 32 and body earth
OK: System voltage
Check the following connectors: A-58, C-40 <R.H. drive
vehicles>, C-02 <R.H. drive vehicles>, C-78 <L.H. drive vehicles>,
C-76 <R.H. drive vehicles>, C-74
OK
Check the trouble symp-
tom.
Measure at the diagnosis connector C-35 and the ABS-ECU con-
nector A-58.
Disconnect the connectors, and measure at the harness side
connectors.
Continuity between the following terminals
ABS-ECU side – Diagnosis connector side
19 – 1
21 – 7
OK: Continuity
NG
Check the following connectors: A-58, C-28 <L.H. drive
vehicles>, C-40 <R.H. drive vehicles>, C-70, C-35
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