Acura CSX. Manual — part 514
01
SNR9A00K732000Y1150FAAT00
−
−
−
−
YES
NO
YES
NO
DTC B1150:
22-106
22-106
Multiplex Integrated Control System
GAUGE CONTROL MODULE (TACH) 36P CONNECTOR
IG1 (BRN)
8. Measure the voltage between gauge control
module (tach) 36P connector terminal No. 17 and
body ground.
Faulty MICU; substitute a known-good
under-dash fuse/relay box and recheck (see page
22-66).
Check No. 10 (7.5 A) fuse in the under-dash
fuse/relay box. If the fuse is OK, check for an open
in the wire between the under-dash fuse/relay box
and the gauge control module (tach), or repair a
short in the wire between the under-dash fuse/relay
box and the gauge control module (tach).
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.
Troubleshooting DTC B1000.
If only DTC B1150 is present, replace the
gauge control module (tach) assembly. If no DTCs
are present, it’s an intermittent failure, the system
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).
Communication Bus Line Error
(Bus OFF)
Wire side of female terminals
Is ther e batter y voltage?
Ar e DT Cs B1001, B1008, B1011, B1032, and or
B1900 also indicated with DT C B1150?
08/08/21 14:25:02 61SNR030_220_0108
SNR9A00K711000Y1200FAAT00
SNR9A0DK734000Y1750FAAT00
−
−
−
−
DTC B1200:
DTC B1750:
YES
NO
YES
NO
22-107
22-107
Communication Bus Line Error
(Bus OFF)
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.
Troubleshoot DTC B1000.
If only DTC B1200 is present, replace the
climate control unit. If no DTCs are present, it’s an
intermittent failure, the system is OK at this time.
Check for loose or poor connections at the climate
control unit 32P connector, and at under-dash fuse/
relay box connector Q (16P).
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.
Troubleshoot DTC B1000.
If only DTC B1750 is present, replace the
HandsFreeLink control unit. If no DTCs are present,
it’s an intermittent failure, the system is OK at this
time. Check for loose or poor connections at the
HandsFreeLink control unit 28P connector, and at
under-dash fuse/relay box connector Q (16P).
Ar e DT Cs B1000, B1008, B1011, B1032, and or
B1900 also indicated with DT C B1200?
Ar e DT Cs B1000, B1008, B1011, and B1032 and or
B1900 also indicated with DT C B17 50?
08/08/21 14:25:02 61SNR030_220_0109
SNR9A00K742000Y1900FAAT00
−
−
DTC B1900:
YES
NO
22-108
Multiplex Integrated Control System
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.
Troubleshoot DTC B1000.
If only DTC B1900 is present, replace the
immobilizer-keyless control unit. If no DTCs are
present, it’s an intermittent failure, the system is
OK at this time. Check for loose or poor
connections at the immobilizer control unit 7P
connector, and at under-dash fuse/relay box
connector Q (16P).
Ar e DT Cs B1000, B1008, B1011, and B1032 also
indicated with DT C B1900?
08/08/21 14:25:02 61SNR030_220_0110
01
SNR9A00J00050641951FCAT00
22-109
MICU Input Test
UNDER-DASH FUSE/RELAY BOX CONNECTOR E (42P)
BLK
BLK
UNDER-DASH FUSE/RELAY BOX CONNECTOR F (34P)
BLK
ORN
UNDER-DASH FUSE/RELAY BOX CONNECTOR G (21P)
1. Before troubleshooting the multiplex integrated control system, troubleshoot the system using B-CAN System
Diagnosis Test Mode A (see page 22-93).
2. Check the No. 10 (7.5 A) fuse in the under-dash fuse/relay box. If the fuse is blown, replace it and go to step 3.
3. Disconnect under-dash fuse/relay box connectors E, F, G, K, and T.
NOTE: All connector views are wire side of female terminals.
08/08/21 14:25:02 61SNR030_220_0111
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