ABS <4WD> -
Troubleshooting
35B-10
Code No.16 ABS-ECU power supply system (abnormal
voltage increase or decrease)
Probable cause
This code is output if the ABS-ECU power supply voltage or valve relay power
supply voltage drops below or rises above a certain level.
D
Malfunction of battery
D
Malfunction of harness or connector
D
Malfunction of the ABS-ECU
Caution
If the system voltage drops or rises during inspection, this code will be output to indicate a current
problem. And correct problem diagnosis will not be possible. Before carrying out the following
procedure, check the battery and recharge it if necessary.
OK
NG
Repair
OK
(1)NG
Check the following connectors:
D-32 <R.H.D.>, D-128,
D-208, D-210 <R.H.D.>, D-213 <L.H.D.>, E-08 <Diesel>, E-13,
E-106
NG
Check the harness wire, and repair if necessary.
D
Between the ignition switch and the ABS-ECU
(2)NG
OK
Check the trouble symptoms.
NG
Repair
NG
Check the harness wire, and repair if necessary.
D
Between the ignition switch and the ABS-ECU
Check the following connectors:
E-13, E-107
Measure at E-106, E-107 ABS-ECU connectors.
D
Disconnect the connector and measure at the harness
side.
D
Ignition switch: ON
(1) Voltage between terminal 13 and body earth
OK:
System voltage
(2) Voltage between terminal 31 and body earth
OK:
System voltage
NG
(1)NG
Check the ABS valve relay (Refer to P.35B-28).
NG
Replace the ABS valve relay.
OK
Check the harness wire, and repair if necessary.
D
Between ignition switch and ABS valve relay
OK
Repair
OK
Replace the ABS-ECU.
Check the trouble symptoms.
Check the following connectors:
B-21X, D-32 <R.H.D.>,
D-128, D-208, D-210 <R.H.D.>, D-213 <L.H.D.>, E-13
OK
NG
(2)NG
Check the harness wire, and repair if necessary.
D
Between fusible link No. 8 and the ABS valve relay
OK
NG
Repair
NG
Check the trouble symptoms.
Check the following connector:
B-21X
OK
NG
OK
NG
Repair
Check the harness wire, and repair if necessary.
D
Between ABS-ECU and ABS valve relay
NG
Check the trouble symptoms.
Check the following connectors:
E-107, B-21X
OK
OK
NG
Repair
Check the trouble symptoms.
Check the following connectors:
B-17, B-18, B-21X, E-107
NG
Repair
Check the harness wire, and repair if necessary.
D
Between ABS valve relay and HBB and ABS-ECU terminal
(48)
Measure at ABS-ECU connector E-107.
D
Disconnect the connector and measure at the harness
side.
D
Ignition switch: ON
D
Voltage between terminal 37 and body earth
OK:
System voltage
Measure at ABS valve relay connector B-21X.
D
Disconnect the connector and measure at the harness
side.
D
Ignition switch: ON
(1) Voltage between 1 and body earth
OK:
System voltage
(2) Voltage between terminal 5 and body earth
OK:
System voltage
Check the trouble symptoms.
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