Diagnosis Item
2: Diagnose shorts in the earth to CAN bus line.
| caution |
When servicing a CAN bus line, earth yourself by
touching
a metal object such as an unpainted water pipe. If you fail to do, a
component connected to
the CAN bus line may be broken.
|
FUNCTION
When diagnosing the CAN bus lines, the M.U.T.-III
measures the voltage of CAN_H
and CAN_L line and detects the short to power supply or earth.
TROUBLE JUDGEMENT CONDITIONS
The M.U.T.-III judges the trouble
when it is impossible to receive the periodically sent
data and the voltage of CAN_H or CAN_L line is less than 1.0
volt.
TROUBLESHOOTING HINTS
- Malfunction of the wiring harness
- Malfunction of the connector
- Malfunction of each ECU
|
|
STEP 1. Check the CAN bus lines. Resistance measurement
at D-127 diagnosis connector.
|
|
|
| caution |
A digital multimeter should be used. For details
refer to  .
|
|
|
|
| caution |
The test wiring harness should be used. For details
refer
to .
|
|
|
|
| note |
This inspection allows you to check that there is a
short to earth in either CAN_H
line or CAN_L line. Thus, in the following steps, check the CAN
bus line that is defective.
|
|
|
|
(1)Disconnect ASTC-ECU D-223 and combination meter connector
D-223, and measure the
resistance at harness side of diagnosis connector D-127.
|
|
|
(2)
| caution |
When measuring the resistance, disconnect the
negative battery
terminal. For details refer to .
|
Ensure that the negative battery terminal is disconnected.
|
|
|
(3)Resistance between D-127 diagnosis connector terminal No.6
(CAN_H) and
body earth
OK: 1 kΩ or more
|
|
|
(4)Resistance between D-127 diagnosis connector terminal
No.14 (CAN_L) and
body earth
OK: 1 kΩ or more
|
|
|
Q.
Is the check result normal?
|
|
|
 <Both of the measurement
results show 1 kΩ or more> Go
to Step 24 .
|
|
|
|
|
|
 <Either of CAN_H line
or CAN_L line the measurement
results show 1 kΩ or more> Go to Step 2.
|
|
|
|
|
|
STEP 2. Check the CAN line. Resistance measurement at D-230
intermediate
connector.
|
|
|
| caution |
A digital multimeter should be used. For details
refer to .
|
|
|
|
| caution |
The test wiring harness should be used. For details
refer
to .
|
|
|
|
(1)Disconnect the intermediate connector (D-230), and measure
at its male-side intermediate
connector (at the front wiring harness side).
|
|
|
(2)
| caution |
When measuring the resistance, disconnect the
negative battery
terminal. For details refer to .
|
Ensure that the negative battery terminal is disconnected.
|
|
|
(3)Resistance between D-230 intermediate connector terminal
No.13 (CAN_H)
and body earth
OK: 1 kΩ or more
|
|
|
(4)Resistance between D-230 intermediate connector terminal
No.12 (CAN_L)
and body earth
OK: 1 kΩ or more
|
|
|
Q.
Is the check result normal?
|
|
|
<1 kΩ or more>
Go to Step 13.
|
|
|
|
|
|
<less than 1
kΩ> Go to Step 3.
|
|
|
|
|
|
STEP 3. Check the CAN line between joint connector (CAN2) and the
ASTC-ECU. Resistance measurement at D-22 joint connector
(CAN2).
|
|
|
| caution |
A digital multimeter should be used. For details
refer to .
|
|
|
|
| caution |
The test wiring harness should be used. For details
refer
to .
|
|
|
|
(1)Disconnect joint connector (CAN2), and measure at the
wiring harness side.
|
|
|
(2)
| caution |
When measuring the resistance, disconnect the
negative battery
terminal. For details refer to .
|
Ensure that the negative battery terminal is disconnected.
|
|
|
(3)Resistance between D-22 joint connector (CAN2) terminal
No.6 (CAN_H) and
body earth
OK: 1 kΩ or more
|
|
|
(4)Resistance between D-22 joint connector (CAN2) terminal
No.11 (CAN_L)
and body earth
OK: 1 kΩ or more
|
|
|
(5)
| caution |
Strictly observe the specified wiring harness repair
procedure.
For details refer to .
|
|
|
|
Q.
Is the check result normal?
|
|
|
YES <petrol powered vehicles without
ASTC> :
<1 kΩ or more> Go to Step 8.
|
|
|
|
|
|
YES <diesel powered vehicles without
ASTC-M/T> : <1 kΩ or
more> Go to Step 8.
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|
|
|
|
|
YES <diesel powered vehicles without
ASTC-A/T> : <1 kΩ or
more> Go to Step 6.
|
|
|
|
|
|
YES <vehicles with ASTC> : <1
kΩ or more> Go to Step 4.
|
|
|
|
|
|
NO (the check result is not normal.) :
<less than 1 kΩ> Repair the wiring harness between joint
connector (CAN2) and the ASTC-ECU connector.
|
|
|
|
|
|
STEP 4. Check the CAN line between joint connector (CAN2) and the
G and yaw rate sensor. Resistance measurement at D-22 joint connector
(CAN2).
|
|
|
| caution |
A digital multimeter should be used. For details
refer to .
|
|
|
|
| caution |
The test wiring harness should be used. For details
refer
to .
|
|
|
|
(1)Disconnect joint connector (CAN2), and measure at the
wiring harness side.
|
|
|
(2)
| caution |
When measuring the resistance, disconnect the
negative battery
terminal. For details refer to .
|
Ensure that the negative battery terminal is disconnected.
|
|
|
(3)Resistance between D-22 joint connector (CAN2) terminal
No.1 (CAN_H) and
body earth
OK: 1 kΩ or more
|
|
|
(4)Resistance between D-22 joint connector (CAN2) terminal
No.4 (CAN_L) and
body earth
OK: 1 kΩ or more
|
|
|
(5)
| caution |
Strictly observe the specified wiring harness repair
procedure.
For details refer to .
|
|
|
|
Q.
Is the check result normal?
|
|
|
YES <petrol powred vehicles or diesel
powered vehicles-M/T> : <1 kΩ or
more> Go to Step 8.
|
|
|
|
|
|
YES <diesel powered
vehicles-A/T> : <1 kΩ or
more> Go to Step 6.
|
|
|
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|
|
NO (the check result is not normal.) : <less
than 1 kΩ> Go to Step 5.
|
|
|
|
|
|
STEP 5. M.U.T.-III CAN bus diagnostics [G and yaw rate sensor
connector disconnected]
|
|
|
(1)Disconnect G and yaw rate sensor connector D-18, and
diagnose by using the M.U.T.-III.
|
|
(2)Diagnose CAN bus lines, and check if
M.U.T.-III screen is as shown in the illustration.
Q.
Does M.U.T.-III screen correspond to the illustration?
Check the intermediate connector
(D-225), and repair if necessary. If the intermediate
connector is in good condition, repair the wiring harness between joint
connector (CAN2) and
the G and yaw rate sensor connector.
Check the G and yaw rate sensor
connector, and repair if necessary. If the G and
yaw rate sensor connector is in good condition, repair the G and yaw rate
sensor power supply
circuit. Refer to GROUP 35C - Troubleshooting .
|
|
|
STEP 6. Check the CAN line between joint connector (CAN2) and the
A/T-ECU. Resistance measurement at D-22 joint connector
(CAN2).
|
|
|
| caution |
A digital multimeter should be used. For details
refer to .
|
|
|
|
| caution |
The test wiring harness should be used. For details
refer
to .
|
|
|
|
(1)Disconnect joint connector (CAN2), and measure at the
wiring harness side.
|
|
|
(2)
| caution |
When measuring the resistance, disconnect the
negative battery
terminal. For details refer to .
|
Ensure that the negative battery terminal is disconnected.
|
|
|
(3)Resistance between D-22 joint connector (CAN2) terminal
No.8 (CAN_H) and
body earth
OK: 1 kΩ or more
|
|
|
(4)Resistance between D-22 joint connector (CAN2) terminal
No.10 (CAN_L)
and body earth
OK: 1 kΩ or more
|
|
|
(5)
| caution |
Strictly observe the specified wiring harness repair
procedure.
For details refer to .
|
|
|
|
Q.
Is the check result normal?
|
|
|
<1 kΩ or more>
Repair intermediate connector (D-230),
or the wiring harness between joint connector (CAN2) and the intermediate
connector (D-230).
|
|
|
|
|
|
NO : <less than 1
kΩ> Go to Step 7.
|
|
|
|
|
|
STEP 7. M.U.T.-III CAN bus diagnostics [A/T-ECU connector
disconnected]
|
|
|
(1)Disconnect A/T-ECU connector D-39, and diagnose by
using the M.U.T.-III.
|
|
(2)Diagnose CAN bus lines, and check if
M.U.T.-III screen is as shown in the illustration.
Q.
Does M.U.T.-III screen correspond to the illustration?
Repair the wiring harness between
joint connector (CAN2) and the A/T-ECU
connector.
Check the
A/T-ECU connector, and repair if necessary. If the A/T-ECU
connector is in good condition, repair the A/T-ECU power supply
circuit. Refer to GROUP
23A - Troubleshooting .
|
|
|
STEP 8. Check the CAN line between joint connector (CAN2) and the
SRS-ECU. Resistance measurement at D-22 joint connector
(CAN2).
|
|
|
| caution |
A digital multimeter should be used. For details
refer to .
|
|
|
|
| caution |
The test wiring harness should be used. For details
refer
to .
|
|
|
|
(1)Disconnect joint connector (CAN2), and measure at the
wiring harness side.
|
|
|
(2)
| caution |
When measuring the resistance, disconnect the
negative battery
terminal. For details refer to .
|
Ensure that the negative battery terminal is disconnected.
|
|
|
(3)Resistance between D-22 joint connector (CAN2) terminal
No.3 (CAN_H) and
body earth
OK: 1 kΩ or more
|
|
|
(4)Resistance between D-22 joint connector (CAN2) terminal
No.9 (CAN_L) and
body earth
OK: 1 kΩ or more
|
|
|
(5)
| caution |
Strictly observe the specified wiring harness repair
procedure.
For details refer to .
|
|
|
|
Q.
Is the check result normal?
|
|
|
YES <except 2800> : <1 kΩ or
more> Go to Step 10.
|
|
|
|
|
|
YES <2800> : <1 kΩ or
more> Repair intermediate connector (D-230),
or the wiring harness between joint connector (CAN2) and the intermediate
connector (D-230).
|
|
|
|
|
|
NO (the check result is not normal.) : <less
than 1 kΩ> Go to Step 9.
|
|
|
|
|
|
STEP 9. M.U.T.-III CAN bus diagnostics [SRS-ECU connector
disconnected]
|
|
|
(1)Disconnect SRS-ECU connector D-24, and diagnose by using
the M.U.T.-III.
|
|
(2)Diagnose CAN bus lines, and check if
M.U.T.-III screen is as shown in the illustration.
Q.
Does M.U.T.-III screen correspond to the illustration?
Check the intermediate connector
(D-231), and repair if necessary. If the intermediate
connector is in good condition, repair the wiring harness between joint
connector (CAN2) and
the SRS-ECU connector.
Check the SRS-ECU connector, and
repair if necessary. If the SRS-ECU connector
is in good condition, repair the SRS-ECU power supply circuit. Refer to
GROUP 52B - Troubleshooting .
|
|
|
STEP 10. Check the CAN line between joint connector (CAN2) and the
engine-ECU <M/T> or engine-A/T-ECU
<A/T>.
Resistance measurement at D-22 joint connector (CAN2).
|
|
|
| caution |
A digital multimeter should be used. For details
refer to .
|
|
|
|
| caution |
The test wiring harness should be used. For details
refer
to .
|
|
|
|
(1)Disconnect joint connector (CAN2), and measure at the
wiring harness side.
|
|
|
(2)
| caution |
When measuring the resistance, disconnect the
negative battery
terminal. For details refer to .
|
Ensure that the negative battery terminal is disconnected.
|
|
|
(3)Resistance between D-22 joint connector (CAN2) terminal
No.7 (CAN_H) and
body earth
OK: 1 kΩ or more
|
|
|
(4)Resistance between D-22 joint connector (CAN2) terminal
No.12 (CAN_L)
and body earth
OK: 1 kΩ or more
|
|
|
Q.
Is the check result normal?
|
|
|
<1 kΩ or more>
Repair intermediate connector (D-230),
or the wiring harness between joint connector (CAN2) and the intermediate
connector (D-230).
|
|
|
|
|
|
<less than 1
kΩ> Go to Step 11.
|
|
|
|
|
|
STEP 11. M.U.T.-III CAN bus diagnostics [engine-ECU connector
<3000-M/T,
3200, 3800-M/T> or engine-A/T-ECU connector
<3000-A/T, 3800-A/T>
disconnected]
|
|
|
(1)Disconnect engine-ECU connector D-215 <3200>
or D-245 <3000-M/T,
3800-M/T> or engine-A/T-ECU connector D-216
<3000-A/T, 3800-A/T>,
and diagnose by using the M.U.T.-III.
|
|
(2)Diagnose CAN bus lines, and check if
M.U.T.-III screen is as shown in the illustration.
Q.
Does M.U.T.-III screen correspond to the illustration?
Repair the wiring harness between
joint connector (CAN2) and engine-ECU connector <3000-M/T,
3200, 3800-M/T> or engine-A/T-ECU connector
<3000-A/T,
3800-A/T>.
Check engine-ECU connector
<3000-M/T, 3200, 3800-M/T> or
engine-A/T-ECU connector <3000-A/T,
3800-A/T>, and
repair if necessary. If engine-ECU connector <3000-M/T, 3200,
3800-M/T> or
engine-A/T-ECU connector <3000-A/T, 3800-A/T>
is
in good condition, go to Step 12.
|
|
|
STEP 12. M.U.T.-III CAN bus diagnostics (retest the
system)
|
|
|
Diagnose CAN bus lines, and check if M.U.T.-III
screen shows normal state.
|
|
|
Q.
Is the check result normal?
|
|
|
The
trouble can be an intermittent malfunction (Refer to GROUP 00 - How
to use Troubleshooting/inspection Service Points - How to Cope
with Intermittent
Malfunction ).
|
|
|
|
|
|
Replace the engine-ECU connector
<3000-M/T, 3200, 3800-M/T> or
engine-A/T-ECU connector <3000-A/T,
3800-A/T>.
|
|
|
|
|
|
STEP 13. Check the CAN line between joint connector (CAN1) and the
combination meter. Resistance measurement at D-03 joint connector
(CAN1).
|
|
|
| caution |
A digital multimeter should be used. For details
refer to .
|
|
|
|
| caution |
The test wiring harness should be used. For details
refer
to .
|
|
|
|
(1)Disconnect joint connector (CAN1), and measure at the
wiring harness side.
|
|
|
(2)
| caution |
When measuring the resistance, disconnect the
negative battery
terminal. For details refer to .
|
Ensure that the negative battery terminal is disconnected.
|
|
|
(3)Resistance between D-03 joint connector (CAN1) terminal
No.1 (CAN_H) and
body earth <LH drive vehicles>
OK: 1 kΩ or
more
|
|
|
(4)Resistance between D-03 joint connector (CAN1) terminal
No.3 (CAN_H) and
body earth <RH drive vehicles>
OK: 1 kΩ or
more
|
|
|
(5)Resistance between D-03 joint connector (CAN1) terminal
No.12 (CAN_L)
and body earth <LH drive vehicles>
OK: 1 kΩ
or more
|
|
|
(6)Resistance between D-03 joint connector (CAN1) terminal
No.14 (CAN_L)
and body earth <RH drive vehicles>
OK: 1 kΩ
or more
|
|
|
Q.
Is the check result normal?
|
|
|
YES <except vehicles for South
Africa-3200> : <1 kΩ or
more> Go to Step 16.
|
|
|
|
|
|
YES <vehicles for South
Africa-3200> : <1 kΩ or
more> Go to Step 14.
|
|
|
|
|
|
NO (the check result is not normal.) :
<less than 1 kΩ> Repair the wiring harness between joint
connector (CAN1) and the combination meter connector.
|
|
|
|
|
|
STEP 14. Check the CAN line between joint connector (CAN1) and the
immobilizer-ECU. Resistance measurement at D-03 joint connector
(CAN1).
|
|
|
| caution |
A digital multimeter should be used. For details
refer to .
|
|
|
|
| caution |
The test wiring harness should be used. For details
refer
to .
|
|
|
|
(1)Disconnect joint connector (CAN1), and measure at the
wiring harness side.
|
|
|
(2)
| caution |
When measuring the resistance, disconnect the
negative battery
terminal. For details refer to .
|
Ensure that the negative battery terminal is disconnected.
|
|
|
(3)Resistance between D-03 joint connector (CAN1) terminal
No.5 (CAN_H) and
body earth
OK: 1 kΩ or more
|
|
|
(4)Resistance between D-03 joint connector (CAN1) terminal
No.16 (CAN_L)
and body earth
OK: 1 kΩ or more
|
|
|
(5)
| caution |
Strictly observe the specified wiring harness repair
procedure.
For details refer to .
|
|
|
|
Q.
Is the check result normal?
|
|
|
<1 kΩ or more>
Go to Step 16.
|
|
|
|
|
|
<less than 1
kΩ> Go to Step 15.
|
|
|
|
|
|
STEP 15. M.U.T.-III CAN bus diagnostics [immobilizer-ECU
connector
disconnected]
|
|
|
(1)Disconnect immobilizer-ECU connector D-126, and diagnose
by using the M.U.T.-III.
|
|
(2)Diagnose CAN bus lines, and check if
M.U.T.-III screen is as shown in the illustration.
Q.
Does M.U.T.-III screen correspond to the illustration?
Repair the wiring harness between
joint connector (CAN1) and the immobilizer-ECU
connector.
Check the
immobilizer-ECU connector, and repair if necessary. If the immobilizer-ECU
connector is in good condition, repair the immobilizer-ECU power supply
circuit. Refer to GROUP
54A - Troubleshooting .
|
|
|
STEP 16. Check CAN line between joint connector (CAN1) and the
ETACS-ECU.
Resistance measurement at D-03 joint connector (CAN1).
|
|
|
| caution |
A digital multimeter should be used. For details
refer to .
|
|
|
|
| caution |
The test wiring harness should be used. For details
refer
to .
|
|
|
|
(1)Disconnect joint connector (CAN1), and measure at the
wiring harness side.
|
|
|
(2)
| caution |
When measuring the resistance, disconnect the
negative battery
terminal. For details refer to .
|
Ensure that the negative battery terminal is disconnected.
|
|
|
(3)Resistance between D-03 joint connector (CAN1) terminal
No.6 (CAN_H) and
body earth
OK: 1 kΩ or more
|
|
|
(4)Resistance between D-03 joint connector (CAN1) terminal
No.17 (CAN_L)
and body earth
OK: 1 kΩ or more
|
|
|
(5)
| caution |
Strictly observe the specified wiring harness repair
procedure.
For details refer to .
|
|
|
|
Q.
Is the check result normal?
|
|
|
YES <vehicles with centre
display> :
<1 kΩ or more> Go to Step 19.
|
|
|
|
|
|
YES <vehicles without centre display and
ASTC> :
<1 kΩ or more> Go to Step 23.
|
|
|
|
|
|
YES <vehicles without centre display and
with ASTC>
: <1 kΩ or more> Go to Step 21.
|
|
|
|
|
|
NO (the check result is not normal.) : <less
than 1 kΩ> Go to Step 17.
|
|
|
|
|
|
STEP 17. M.U.T.-III CAN bus diagnostics [ETACS-ECU connector
disconnected]
|
|
|
(1)Disconnect ETACS-ECU connector D-420, and diagnose by
using the M.U.T.-III.
|
|
(2)Diagnose CAN bus lines, and check if
M.U.T.-III screen is as shown in the illustration.
Q.
Does M.U.T.-III screen correspond to the illustration?
Repair the wiring harness between
joint connector (CAN2) and the ETACS-ECU connector.
Check the
ETACS-ECU connector, and repair if necessary. If the ETACS-ECU connector
is in good condition, go to Step 18.
|
|
|
STEP 18. M.U.T.-III CAN bus diagnostics (retest the
system)
|
|
|
Diagnose CAN bus lines, and check if M.U.T.-III
screen shows normal state.
|
|
|
Q.
Is the check result normal?
|
|
|
The
trouble can be an intermittent malfunction (Refer to GROUP 00 - How
to use Troubleshooting/inspection Service Points - How to Cope
with Intermittent
Malfunction ).
|
|
|
|
|
|
Replace the ETACS-ECU.
|
|
|
|
|
|
STEP 19. Check the CAN line between joint connector (CAN1) and the
centre display. Resistance measurement at D-03 joint connector
(CAN1).
|
|
|
| caution |
A digital multimeter should be used. For details
refer to .
|
|
|
|
| caution |
The test wiring harness should be used. For details
refer
to .
|
|
|
|
(1)Disconnect joint connector (CAN1), and measure at the
wiring harness side.
|
|
|
(2)
| caution |
When measuring the resistance, disconnect the
negative battery
terminal. For details refer to .
|
Ensure that the negative battery terminal is disconnected.
|
|
|
(3)Resistance between D-03 joint connector (CAN1) terminal
No.4 (CAN_H) and
body earth
OK: 1 kΩ or more
|
|
|
(4)Resistance between D-03 joint connector (CAN1) terminal
No.15 (CAN_L)
and body earth
OK: 1 kΩ or more
|
|
|
(5)
| caution |
Strictly observe the specified wiring harness repair
procedure.
For details refer to .
|
|
|
|
Q.
Is the check result normal?
|
|
|
YES <vehicles without ASTC> : <1
kΩ or more> Go to Step 23.
|
|
|
|
|
|
YES <vehicles with ASTC> : <1
kΩ or more> Go to Step 21.
|
|
|
|
|
|
NO (the check result is not normal.) : <less
than 1 kΩ> Go to Step 20.
|
|
|
|
|
|
STEP 20. M.U.T.-III CAN bus diagnostics [centre display connector
disconnected]
|
|
|
(1)Disconnect centre display connector D-106, and diagnose by
using the M.U.T.-III.
|
|
(2)Diagnose CAN bus lines, and check if
M.U.T.-III screen is as shown in the illustration.
Q.
Does M.U.T.-III screen correspond to the illustration?
Repair the wiring harness between
joint connector (CAN1) and the centre display
connector.
Check the centre
display connector, and repair if necessary. If the centre display
connector is in good condition, repair the centre display power supply
circuit. Refer to GROUP
54A - Troubleshooting .
|
|
|
STEP 21. Check the CAN line between joint connector (CAN1) and the
steering wheel sensor. Resistance measurement at D-03 joint connector
(CAN1).
|
|
|
| caution |
A digital multimeter should be used. For details
refer to .
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|
| caution |
The test wiring harness should be used. For details
refer
to .
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(1)Disconnect joint connector (CAN1), and measure at the
wiring harness side.
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(2)
| caution |
When measuring the resistance, disconnect the
negative battery
terminal. For details refer to .
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Ensure that the negative battery terminal is disconnected.
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(3)Resistance between D-03 joint connector (CAN1) terminal
No.2 (CAN_H) and
body earth
OK: 1 kΩ or more
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(4)Resistance between D-03 joint connector (CAN1) terminal
No.13 (CAN_L)
and body earth
OK: 1 kΩ or more
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(5)
| caution |
Strictly observe the specified wiring harness repair
procedure.
For details refer to .
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Q.
Is the check result normal?
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<1 kΩ or more>
Go to Step 23.
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<less than 1
kΩ> Go to Step 22.
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STEP 22. M.U.T.-III CAN bus diagnostics [steering wheel sensor
connector disconnected]
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(1)Disconnect steering wheel sensor connector D-308, and
diagnose by using the M.U.T.-III.
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(2)Diagnose CAN bus lines, and check if
M.U.T.-III screen is as shown in the illustration.
Q.
Does M.U.T.-III screen correspond to the illustration?
Repair the wiring harness between
joint connector (CAN1) and the steering wheel
sensor connector.
Check the
steering wheel sensor connector, and repair if necessary. If the steering
wheel sensor connector is in good condition, repair the steering wheel
sensor power supply circuit.
Refer to GROUP 35C - Troubleshooting .
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STEP 23. Check the CAN line between joint connector (CAN1) and the
diagnosis connector. Resistance measurement at D-03 joint connector
(CAN1).
|
|
|
| caution |
A digital multimeter should be used. For details
refer to .
|
|
|
|
| caution |
The test wiring harness should be used. For details
refer
to .
|
|
|
|
(1)Disconnect joint connector (CAN1), and measure at the
wiring harness side.
|
|
|
(2)
| caution |
When measuring the resistance, disconnect the
negative battery
terminal. For details refer to .
|
Ensure that the negative battery terminal is disconnected.
|
|
|
(3)Resistance between D-03 joint connector (CAN1) terminal
No.1 (CAN_H) and
body earth <RH drive vehicles>
OK: 1 kΩ or
more
|
|
|
(4)Resistance between D-03 joint connector (CAN1) terminal
No.3 (CAN_H) and
body earth <LH drive vehicles>
OK: 1 kΩ or
more
|
|
|
(5)Resistance between D-03 joint connector (CAN1) terminal
No.12 (CAN_L)
and body earth <RH drive vehicles>
OK: 1 kΩ
or more
|
|
|
(6)Resistance between D-03 joint connector (CAN1) terminal
No.14 (CAN_L)
and body earth <LH drive vehicles>
OK: 1 kΩ
or more
|
|
|
(7)
| caution |
Strictly observe the specified wiring harness repair
procedure.
For details refer to .
|
|
|
|
Q.
Is the check result normal?
|
|
|
<1 kΩ or more>
Repair the intermediate connector, or
the wiring harness between joint connector (CAN1) and the intermediate
connector (D-230).
|
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|
|
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<less than 1 kΩ>
Repair the diagnosis connector, or
the wiring harness between joint connector (CAN1) and the diagnosis
connector.
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STEP 24. M.U.T.-III CAN bus diagnostics [ASTC-ECU connector
disconnected]
|
|
|
(1)Disconnect ASTC-ECU connector D-223 and diagnose by using
the M.U.T.-III.
|
|
(2)Diagnose CAN bus lines, and check if
M.U.T.-III screen is as shown in the illustration.
Q.
Does M.U.T.-III screen correspond to the illustration?
Go to Step
26.
Check
the ASTC-ECU connector, and repair if necessary. If the ASTC-ECU connector
is in good condition, go to Step 25.
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|
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STEP 25. M.U.T.-III CAN bus diagnostics (retest the
system)
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|
|
Diagnose CAN bus lines, and check if M.U.T.-III
screen shows normal state.
|
|
|
Q.
Is the check result normal?
|
|
|
The
trouble can be an intermittent malfunction (Refer to GROUP 00 - How
to use Troubleshooting/inspection Service Points - How to Cope
with Intermittent
Malfunction ).
|
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|
Replace the ASTC-ECU.
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STEP 26. M.U.T.-III CAN bus diagnostics [combination meter
connector disconnected]
|
|
|
(1)Disconnect combination meter connector D-04, and diagnose
by using the M.U.T.-III.
|
|
(2)Diagnose CAN bus lines, and check if
M.U.T.-III screen is as shown in the illustration.
Q.
Does M.U.T.-III screen correspond to the illustration?
The trouble can be an intermittent
malfunction (Refer to GROUP 00 - How
to use Troubleshooting/inspection Service Points - How to Cope
with Intermittent
Malfunction ).
Check the combination meter
connector, and repair if necessary. If the combination
meter connector is in good condition, go to Step 27.
|
|
|
STEP 27. M.U.T.-III CAN bus diagnostics (retest the
system)
|
|
|
Diagnose CAN bus lines, and check if M.U.T.-III
screen shows normal state.
|
|
|
Q.
Is the check result normal?
|
|
|
The
trouble can be an intermittent malfunction (Refer to GROUP 00 - How
to use Troubleshooting/inspection Service Points - How to Cope
with Intermittent
Malfunction ).
|
|
|
|
|
|
Replace the combination
meter.
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