Acura CSX. Manual — part 513
SNR9A00K763000Y1000FAAT10
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−
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−
−
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DTC B1000:
YES
NO
YES
NO
Control Unit
Connector
YES
NO
Control Unit
Appropriate Connector
22-102
Multiplex Integrated Control System
DTC Troubleshooting
Communication Bus Line Error
(BUS-OFF)
NOTE: If you are troubleshooting multiple DTCs, be
sure to follow the instructions in B-CAN System
Diagnosis Test Mode A (see page 22-93).
1. Clear the DTCs with the HDS.
2. Turn the ignition switch to LOCK (0), and then back
to ON (II).
3. Wait for at least 6 seconds.
4. Check for DTCs with the HDS.
Go to step 5.
Intermittent failure, the communication bus
line is OK at this time. Check for loose or poor
connections, or worn/shorted wires. If the
connections are good, check the battery condition
(see page 22-67) and the charging system.
5. Check for DTCs with the HDS.
Go to step 6.
Faulty MICU; replace the under-dash fuse/
relay box (see page 22-66).
6. Turn the ignition switch to LOCK (0).
7. Disconnect the appropriate connector at each
control unit in the table one at a time. Clear the
DTCs, then recheck for DTCs after each unit is
disconnected.
Gauge control
module (tach)
36P connector
Immobilizer-keyless
control unit
7P connector
Climate control unit
32P connector
HandsFreeLink
control unit
28P connector
Go to step 8.
Check the power and grounds to the control
unit that was disconnected when B1000 did not
reset. If OK, replace the control unit.
8. Disconnect all of the appropriate connectors for
each of the units in the table.
Gauge control
module (tach)
36P connector
Immobilizer-keyless
control unit
7P connector
Climate control unit
32P connector
HandsFreeLink
control unit
28P connector
Is DT C B1000 indicated?
Ar e DT Cs B1008, B1011, and B1032 also
indicated?
Is DT C B1000 indicated with each individual unit
disconnected?
08/08/21 14:25:01 61SNR030_220_0104
*01
*02
SNR9A00K763000Y1001FAAT00
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−
−
−
−
−
YES
NO
YES
NO
YES
NO
DTC B1001:
DTC B1002:
22-103
22-103
UNDER-DASH FUSE/RELAY BOX CONNECTOR Q (16P)
B-CAN (PNK)
UNDER-DASH FUSE/RELAY BOX CONNECTOR Q (16P)
B-CAN (PNK)
9. Disconnect under-dash fuse/relay box connector Q
(16P).
10. Check for continuity between under-dash fuse/relay
box connector Q (16P) No. 6 terminal and body
ground.
Repair a short to ground in the wire between
the under-dash fuse/relay box and the affected
control unit.
Go to step 11.
11. Measure the voltage between under-dash fuse/
relay box connector Q (16P) terminal No. 6 and
body ground.
Replace the under-dash fuse/relay box
(see page 22-66).
Repair a short to power in the wire between
the under-dash fuse/relay box and the affected
control unit.
NOTE: If you are troubleshooting multiple DTCs, be
sure to follow the instructions in B-CAN System
Diagnosis Test Mode A (see page 22-93).
1. Clear the DTCs with the HDS.
2. Turn the ignition switch to LOCK (0), and then back
to ON (II).
3. Wait for at least 6 seconds.
4. Check for DTCs with the HDS.
Faulty MICU; replace the under-dash fuse/
relay box (see page 22-66).
Intermittent failure, the MICU is OK at this
time. Check for loose or poor connections. If the
connections are good, check the battery condition
(see page 22-67) and the charging system.
MICU (CPU) Error
MICU (EEPROM) Error
Wire side of female terminals
Wire side of female terminals
Is ther e continuity?
Is ther e less than 0.1 V ?
Is DT C B1001 and/ or B1002 indicated?
08/08/21 14:25:01 61SNR030_220_0105
SNR9AA1K763000Y1008FAAT00
SNR9A00K763000Y1011FAAT00
−
−
−
−
−
−
−
−
DTC B1008:
DTC B1011:
YES
NO
YES
NO
YES
NO
YES
NO
22-104
22-104
Multiplex Integrated Control System
MICU Lost Communication with
Gauge Control Module (A/T Message)
MICU Lost Communication with
Gauge Control Module (VSP/NE Message)
NOTE: If you are troubleshooting multiple DTCs, be
sure to follow the instructions in B-CAN System
Diagnosis Test Mode A (see page 22-93).
1. Clear the DTCs with the HDS.
2. Turn the ignition switch to LOCK (0), and then back
to ON (II).
3. Wait for at least 6 seconds.
4. Check for DTCs with the HDS.
Go to step 5.
Intermittent failure, the gauge control module
is OK at this time. Check for loose or poor
connections at the gauge control module (tach) 36P
connector and at under-dash fuse/relay box
connector Q (16P). If the connections are good,
check the battery condition (see page 22-67) and
the charging system.
5. Check for DTCs with the HDS.
Check for an open in the communication
circuit between the MICU and the gauge control
module (tach). If the circuit is bad, repair the
open.
Go to the gauge control module (tach) input
test (see page 22-271).
NOTE: If you are troubleshooting multiple DTCs, be
sure to follow the instructions in B-CAN System
Diagnosis Test Mode A (see page 22-93).
1. Clear the DTCs with the HDS.
2. Turn the ignition switch to LOCK (0), and then back
to ON (II).
3. Wait for at least 6 seconds.
4. Check for DTCs with the HDS.
Go to step 5.
Intermittent failure, the gauge control module
is OK at this time. Check for loose or poor
connections at the gauge control module (tach) 36P
connector and at under-dash fuse/relay box
connector Q (16P). If the connections are good,
check the battery condition (see page 22-67) and
the charging system.
5. Check for DTCs with the HDS.
Check for an open in the communication
circuit between the MICU and the gauge control
module (tach). If the circuit is bad, repair the
open.
Go to the gauge control module (tach) input
test (see page 22-271).
Is DT C B1008 indicated?
Ar e DT Cs B1011 and B1032 also indicated with
DT C B1008?
Is DT C B1011 indicated?
Ar e DT Cs B1008 and B1032 also indicated with
DT C B1011?
08/08/21 14:25:01 61SNR030_220_0106
SNR9A00K763000Y1032FAAT00
SNR9A00K763000Y1036FAAT00
−
−
−
−
−
−
−
−
DTC B1032:
DTC B1036:
YES
NO
YES
NO
YES
NO
YES
NO
22-105
22-105
MICU Lost Communication with
the SRS Unit (CDS Message) CDS (Collision
detection signal) input circuit malfunction
IG1 Line Input Error
NOTE: If you are troubleshooting multiple DTCs, be
sure to follow the instructions in B-CAN System
Diagnosis Test Mode A (see page 22-93).
1. Clear the DTCs with the HDS.
2. Turn the ignition switch to LOCK (0), and then back
to ON (II).
3. Wait for at least 6 seconds.
4. Check for DTCs with the HDS.
Go to step 5.
Intermittent failure, the gauge control module
is OK at this time. Check for loose or poor
connections at the gauge control module (tach) 36P
connector, and at under-dash fuse/relay box
connector Q (16P). If the connections are good,
check the battery condition (see page 22-67) and
the charging system.
5. Check for DTCs with the HDS.
Check for an open in the communication
circuit between the MICU and the gauge control
module (tach). If the circuit is bad, repair the
open.
Go to the gauge control module (tach) input
test (see page 22-271).
NOTE: If you are troubleshooting multiple DTCs, be
sure to follow the instructions in B-CAN System
Diagnosis Test Mode A (see page 22-93).
1. Clear the DTCs with the HDS.
2. Turn the ignition switch to LOCK (0), and then back
to ON (II).
3. Wait for at least 6 seconds.
4. Check for DTCs with the HDS.
Go to step 5.
Intermittent failure, the system is OK at this
time. Check for loose or poor connection at the
gauge control module (tach) 36P connector, and at
under-dash fuse/relay box connector Q (16P). If the
connections are good, check the battery condition
(see page 22-67) and the charging system.
5. Check for DTCs with the HDS.
Troubleshoot the indicated DTC.
Go to step 6.
6. Turn the ignition switch to LOCK (0).
7. Turn the ignition switch to ON (II).
Is DT C B1032 indicated?
Ar e DT Cs B1008 and B1011 also indicated with
DT C B1032?
Is DT C B1036 indicated?
Is DT C B1008 indicated with DT C B1036?
08/08/21 14:25:01 61SNR030_220_0107
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