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ABS <2WD> -
Troubleshooting
35B-13
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.
D Blown fuse
D Malfunction of wiring harness or connector
D Malfunction of hydraulic unit
NG
Repair
NG
Check the harness wire, and repair if necessary.
D Between ABS-ECU and diagnosis connector
OK
NG
Repair
NG
Check the harness wire, and repair if necessary.
D Between ignition switch and ABS-ECU
OK
NG
Repair
NG
Check the harness wire, and repair if necessary.
D Between ABS-ECU and earth
NG
Repair
NG
Replace the hydraulic unit.
OK
Check the trouble symp-
tom.
OK
Check the trouble symp-
tom.
OK
Check the following connector:
A-04
Measure at the ABS-ECU connector A-04.
D Disconnect the connector, and measure at the harness side
connector.
D Continuity between 8 and body earth, between 11 and body
earth and between 24 and body earth
OK:
Continuity
NG
Check the following connector:
A-04
OK
Check the trouble symp-
tom.
Measure at the ABS-ECU connector A-04.
D Disconnect the connector, and measure at the harness side
connector.
D Ignition switch: ON
D Voltage between 4 and body earth
OK:
Battery voltage
NG
Check the following connectors:
A-04, C-75, C-66 <L.H. drive vehicles>, C-134, C-131
OK
Check the trouble symp-
tom.
Measure at the diagnosis connector C-20 and the ABS-ECU con-
nector A-04.
D Disconnect the connector, and measure at the harness side
connector.
D Continuity between the following terminals
ABS-ECU side - Diagnosis connector side
14 - 1
7-7
OK:
Continuity
NG
Check the following connectors:
<PETROL-POWERED VEHICLES>
C-51, C-49, C-83, C-66, C-20
<DIESEL-POWERED VEHICLES>
C-51, C-56, C-83, C-66, C-20