Code No.41, 42,
43, 44: Control Solenoid Valve (FR, FL, RR, RL) System
Code No.45, 46:
Switch Solenoid
Valve (FR, FL) System
<L.H.drive
vehicles>
<R.H.drive
vehicles>
OPERATION
- The solenoid valve is always energised through the ABS-ECU internal valve
relay.
- The ABS-ECU activates the solenoid valve by turning ON its valve
relay.
DIAGNOSIS CODE SET CONDITIONS
Diagnosis codes No. 41, 42, 43, 44,
45, 46, 47, and 48 are set in the following cases;
- The solenoid valve is not energised when the ABS-ECU turned the valve
relay
to ON. (Open in the ABS-ECU power supply circuit)
- The solenoid valve is not energised when the ABS-ECU turned the valve
relay to ON.
(Open circuit of ABS-ECU internal solenoid valve)
- The solenoid valve remains to be energised when the ABS-ECU turned the
valve relay
to OFF. (Short in the solenoid valve circuit)
- When a solenoid valve failure is detected
PROBABLE CAUSES
The most likely causes for these diagnosis codes
to set are:
- Damaged wiring harness or connector
- Malfunction of the solenoid valve
- Malfunction of the ABS-ECU
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STEP 1. Resistance measurement at HBB connector B-106, B-107
and B-108.
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Measure the resistance between the terminals of
each solenoid valve at HBB connector B-106,
B-107 and B-108 (equipment side) (Refer to  ).
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Q.
Is the check result normal?
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 Go to Step 2.
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 Replace the HBB. Then go to Step
4.
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STEP 2. Check the harness wires between HBB connector B-106 and ABS-ECU
connector D-250, D-251.
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Check the wiring harnesses between the
following terminals.
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Code No.41
- HBB connector B-106 (terminal No.19) - ABS-ECU connector D-250
(terminal
No.52)
- HBB connector B-106 (terminal No.20) - ABS-ECU connector D-250
(terminal
No.41)
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Code No.42
- HBB connector B-106 (terminal No.21) - ABS-ECU connector D-251
(terminal
No.14)
- HBB connector B-106 (terminal No.22) - ABS-ECU connector D-251
(terminal
No.1)
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Code No.43
- HBB connector B-106 (terminal No.15) - ABS-ECU connector D-251
(terminal
No.15)
- HBB connector B-106 (terminal No.16) - ABS-ECU connector D-251
(terminal
No.2)
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Code No.44
- HBB connector B-106 (terminal No.13) - ABS-ECU connector D-250
(terminal
No.51)
- HBB connector B-106 (terminal No.14) - ABS-ECU connector D-250
(terminal
No.40)
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Code No.45
- HBB connector B-106 (terminal No.18) - ABS-ECU connector D-251
(terminal
No.16)
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Code No.46
- HBB connector B-106 (terminal No.17) - ABS-ECU connector D-251
(terminal
No.3)
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Q.
Is the check result normal?
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Go to Step 3.
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Repair
the wiring harness.
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STEP 3. Check whether the diagnosis code is reset.
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Check again if the diagnosis code is
set.
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(1)Turn the ignition switch to the "ON" position.
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(2)Erase the diagnosis code.
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(3)Turn the ignition switch to the "LOCK" (OFF)
position.
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(4)Turn the ignition switch to the "ON" position.
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(5)Check if the diagnosis code is reset.
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(6)Turn the ignition switch to the "LOCK" (OFF)
position.
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Q.
Is code No.41, 42, 43, 44, 45 or 46 set?
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Replace the ABS-ECU. Then go to
Step 4.
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It can
be assumed that this malfunction is intermittent. Refer to GROUP 00, How
to Use Troubleshooting/Inspection Service Points - How to Cope
with Intermittent
Malfunction .
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STEP 4. Check whether the diagnosis code is reset.
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Check again if the diagnosis code is
set.
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(1)Turn the ignition switch to the "ON" position.
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(2)Erase the diagnosis code.
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(3)Turn the ignition switch to the "LOCK" (OFF)
position.
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(4)Turn the ignition switch to the "ON" position.
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(5)Check if the diagnosis code is reset.
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(6)Turn the ignition switch to the "LOCK" (OFF)
position.
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Q.
Is code No.41, 42, 43, 44, 45 or 46 set?
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Repeat the troubleshooting from
Step 1.
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The
procedure is complete.
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