VDC(diag)-109
VEHICLE DYNAMICS CONTROL (VDC) (DIAGNOSTICS)
Diagnostic Procedure with Diagnostic Trouble Code (DTC)
Step
Check
Yes
No
1
CHECK YAW RATE & LATERAL G SENSOR
POWER SUPPLY.
1) Turn the ignition switch to OFF.
2) Disconnect the connector from the yaw rate
& lateral G sensor.
3) Turn the ignition switch to ON.
4) Measure the voltage between yaw rate &
lateral G sensor and chassis ground.
Connector & terminal
(B230) No. 3 (+) — Chassis ground (
−
):
Is the voltage 10 — 15 V?
Go to step 4.
Go to step 2.
2
CHECK OUTPUT VOLTAGE OF VDCCM&H/
U.
Measure the voltage between VDCCM&H/U
and chassis ground.
Connector & terminal
(B310) No. 30 (+) — Chassis ground (
−
):
Is the voltage 10 — 15 V?
Repair the har-
ness between yaw
rate & lateral G
sensor and
VDCCM&H/U.
Go to step 3.
3
CHECK POOR CONTACT IN CONNECTORS. Is there poor contact in con-
nector?
Correct or replace
the connector.
Go to step 10.
4
CHECK GROUND CIRCUIT OF YAW RATE &
LATERAL G SENSOR.
Measure the resistance between yaw rate &
lateral G sensor and chassis ground.
Connector & terminal
(B230) No. 6 — Chassis ground:
Is the resistance less than 0.5
Ω
?
Go to step 7.
Go to step 5.
5
CHECK GROUND CIRCUIT FOR VDCCM&H/
U.
Measure the resistance between VDCCM&H/U
and chassis ground.
Connector & terminal
(B310) No. 16 — Chassis ground:
Is the resistance less than 0.5
Ω
?
Repair the har-
ness between yaw
rate & lateral G
sensor and
VDCCM&H/U.
Go to step 6.
6
CHECK POOR CONTACT IN CONNECTORS. Is there poor contact in con-
nector?
Correct or replace
the connector.
Go to step 10.
7
CHECK YAW RATE & LATERAL G SENSOR
HARNESS.
1) Disconnect the connector from VDCCM&H/
U.
2) Measure the resistance between
VDCCM&H/U and yaw rate & lateral G sensor.
Connector & terminal
(B310) No. 28 — (B230) No. 4:
Is the resistance less than 0.5
Ω
?
Go to step 8.
Repair the har-
ness between yaw
rate & lateral G
sensor and
VDCCM&H/U.
8
CHECK GROUND SHORT OF HARNESS.
Measure the resistance between VDCCM&H/U
connector and chassis ground.
Connector & terminal
(B310) No. 28 — Chassis ground:
Is the resistance more than 1
M
Ω
?
Go to step 9.
Repair the har-
ness between yaw
rate & lateral G
sensor and
VDCCM&H/U.
9
CHECK YAW RATE & LATERAL G SENSOR.
1) Connect all the connectors.
2) Turn the ignition switch to ON.
3) Check the signal pattern of oscilloscope
between VDCCM&H/U connector terminals.
<Ref. to VDC(diag)-15, WAVEFORM, MEA-
SUREMENT, Control Module I/O Signal.>
Connector & terminal
(B310) No. 2 — No. 16:
(B310) No. 28 — No. 16:
Is the oscilloscope pattern the
same waveform as shown in
the figure?
Go to step 10.
Replace the yaw
rate & lateral G
sensor.
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