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Acura CSX. Manual - part 513

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DTC B1000:

YES

Control Unit

Connector

YES

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?

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YES

DTC B1001:

DTC B1002:

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

Is ther e continuity?

Is ther e less than 0.1 V ?

Is DT C B1001 and/ or B1002 indicated?

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DTC B1008:

DTC B1011:

YES

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

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?

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DTC B1032:

DTC B1036:

YES

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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