ABS(diag)-72
ABS (DIAGNOSTICS)
Diagnostic Procedure with Diagnostic Trouble Code (DTC)
Step
Check
Yes
No
1
CHECK INPUT VOLTAGE OF ABSCM&H/U.
1) Turn the ignition switch to OFF.
2) Disconnect the connector from ABSCM&H/
U.
3) Turn the ignition switch to ON.
4) Measure the voltage between ABSCM&H/
U connector and chassis ground.
Connector & terminal
(B301) No. 13 (+) — Chassis ground (
−
):
Is the voltage 10 — 15 V?
Go to step 2.
Repair the har-
ness connector
between battery
and ABSCM&H/U.
2
CHECK GROUND CIRCUIT OF MOTOR.
1) Turn the ignition switch to OFF.
2) Measure the resistance between
ABSCM&H/U connector and chassis ground.
Connector & terminal
(B301) No. 12 — Chassis ground:
Is the resistance less than 0.5
Ω
?
Go to step 3.
Repair the
ABSCM&H/U
ground harness.
3
CHECK INPUT VOLTAGE OF ABSCM&H/U.
1) Run the engine at idle.
2) Measure the voltage between ABSCM&H/
U connector and chassis ground.
Connector & terminal
(B301) No. 18 (+) — Chassis ground (
−
):
Is the voltage 10 — 15 V?
Go to step 4.
Repair the har-
ness connector
between battery,
ignition switch and
ABSCM&H/U.
4
CHECK GROUND CIRCUIT OF ABSCM&H/U.
1) Turn the ignition switch to OFF.
2) Measure the resistance between
ABSCM&H/U connector and chassis ground.
Connector & terminal
(B301) No. 15 — Chassis ground:
Is the resistance less than 0.5
Ω
?
Go to step 5.
Repair the
ABSCM&H/U
ground harness.
5
CHECK MOTOR OPERATION.
Operate the ABS sequence control. <Ref. to
ABS-10, ABS Sequence Control.>
NOTE:
Use the diagnosis connector to operate the
ABS sequence control.
Can the motor revolution noise
(buzz) be heard when carrying
out the ABS sequence control?
Go to step 6.
Replace
ABSCM&H/U.
<Ref. to ABS-6,
ABS Control Mod-
ule and Hydraulic
Control Unit
(ABSCM&H/U).>
6
CHECK POOR CONTACT IN CONNECTOR.
Turn the ignition switch to OFF.
Is there poor contact in con-
nector between generator, bat-
tery and ABSCM&H/U?
Repair the con-
nector.
Go to step 7.
7
CHECK ABSCM&H/U.
1) Connect all the connectors.
2) Erase the memory.
3) Perform the inspection mode.
4) Read the DTC.
Is the same DTC displayed?
Replace
ABSCM&H/U.
<Ref. to ABS-6,
ABS Control Mod-
ule and Hydraulic
Control Unit
(ABSCM&H/U).>
Go to step 8.
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