Honda Civic. Manual — part 700

Fig. 5: Checking Gauge Drive Circuit Blinking Pattern

If the needle fails to sweep, or the beeper does not sound, replace the gauge control
module (tach).

THE COMMUNICATION LINE CHECK

While in the self-diagnostic mode, the Communication Line Check starts after the
LCD Segments Check.

If all segments come on, the communication line is OK. If faulty, the word "Error"
will be indicated on the odometer display followed by number(s).

4-DOOR ERROR CODE LIST

2-DOOR ERROR CODE LIST

Error code

Type of communication line(s) error

Error 1

F-CAN communication

Error 2

B-CAN communication

Error 3

UART communication

Error 12

F-CAN and B-CAN communication

Error 13

F-CAN and UART communication

Error 23

B-CAN and UART communication

Error 123

F-CAN, B-CAN and UART communication

Error code

Type of communication line(s) error

Error 1

F-CAN communication

Error 2

B-CAN communication

Error 3

F-CAN and B-CAN communication

2008 Honda Civic EX

2006-08 ACCESSORIES & EQUIPMENT Gauges - Civic (All Except Hybrid)

Example Indication

Fig. 6: Example Of Indication

If the word "Error 1" is indicated, there is a malfunction in the communication
line between the gauge control module (tach) and the fast-controller area
network (F-CAN). Check for DTCs in the ECM/PCM and troubleshoot any
DTCs found. If no DTCs are found, go to indicated troubleshooting.

If the word "Error 2" is indicated, there is a malfunction in the communication
line between the gauge control module (tach) and the body-controller area
network (B-CAN). Go to troubleshooting DTC B1155 to DTC B1160 .

4-door: the word "Error 3" is indicated, there is a malfunction in the UART
communication line between the gauge control module (tach) and the gauge
control module (speedo). Go to GAUGE CONTROL MODULE (TACH)
INPUT TEST and check the No. 20 terminal . If the wire harness is OK,
substitute a known-good gauge control module (speedo) and recheck.

If any F-CAN or B-CAN communication line errors are found, go to DTC check
using HDS .

ENDING THE SELF-DIAGNOSTIC FUNCTION

Turn the ignition switch OFF.

Error 12

F-CAN and B-CAN communication

Error 13

F-CAN and B-CAN communication

Error 23

F-CAN and B-CAN communication

Error 123

F-CAN and B-CAN communication

NOTE:

If the vehicle speed exceeds 1.2 mph (2 km/h), the self-

2008 Honda Civic EX

2006-08 ACCESSORIES & EQUIPMENT Gauges - Civic (All Except Hybrid)

CIRCUIT DIAGRAM - GAUGE CONTROL MODULE (TACH)

Fig. 7: Circuit Diagram - Gauge Control Module (Tach) (1 Of 5)

diagnostic function ends.

2008 Honda Civic EX

2006-08 ACCESSORIES & EQUIPMENT Gauges - Civic (All Except Hybrid)

Fig. 8: Circuit Diagram - Gauge Control Module (Tach) (2 Of 5)

2008 Honda Civic EX

2006-08 ACCESSORIES & EQUIPMENT Gauges - Civic (All Except Hybrid)