Acura TSX / Honda Accord CL. Manual — part 46

Fig. 2: Locating Gauges Components (2 Of 2)

SELF-DIAGNOSTIC PROCEDURE

Before troubleshooting the gauge system, refer to multiplex integrated control system B-CAN System
Diagnosis Test Mode A (see B-CAN SYSTEM DIAGNOSIS TEST MODE A ).

2004 Acura TSX

2004 ACCESSORIES & EQUIPMENT Gauges & Indicators - TSX

The gauge control module has a self-diagnosis function.

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The beeper drive circuit check

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The indicator drive circuit check

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The switch input test

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The LCD segments check

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The gauges drive circuit check (Speedometer, Tachometer, Fuel gauge, Coolant temperature gauge)

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The communication line check (of the body-controller area network (B-CAN) communication line and
the frame-controller area network (F-CAN) communication line between the gauges).

Entering the self-diagnosis function

Before doing the self-diagnosis function, check the No. 7 (10A) fuse and the No. 21 (7.5A) fuse in the under-
dash fuse/relay box.

1. Push and hold the trip/reset button.

2. Turn the headlights ON.

3. Turn the ignition switch ON (II).

4. Within 5 sec., turn the headlights OFF, then ON and OFF again.

5. Within 5 sec., release the trip/reset button, and then push and release the button three times repeatedly.

NOTE:

Indicators are also controlled via the communication line.

NOTE:

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While in the self-diagnosis mode, the dash lights brightness controller
operates normally.

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While in the self-diagnosis mode, the trip/reset button is used to start the
Beeper Drive Circuit Test and the Gauge Drive Circuit Check.

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If the vehicle speed exceeds 1.2 mph (2 km/h) or the ignition switch is
turned OFF, the self-diagnosis mode ends.

2004 Acura TSX

2004 ACCESSORIES & EQUIPMENT Gauges & Indicators - TSX

Fig. 3: Self-Diagnosis Mode

The Beeper Drive Circuit Check

When entering the self-diagnosis mode, the beeper sounds five times.

The Indicator Drive Circuit Check

When entering the self-diagnosis mode, the following indicator lights blink:

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seat belt indicator

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charging system indicator

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low fuel indicator

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maintenance required indicator

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security indicator

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high beam indicator

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lights on indicator

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malfunction indicator lamp (MIL)

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A/T gear position indicator

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ABS indicator

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cruise main indicator

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safety indicators (doors and trunk)

Switch Input Check

After the intermittent beeper sounds at the initial stage of self-diagnosis, a beeper sounds continuously while
any of the following switch inputs are switched from OFF to ON:

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cruise control main cruise set switch

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cruise cancel switch

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cruise resume switch

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VSA OFF switch

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parking brake switch

The LCD Segment Check

When entering the self-diagnosis mode, the odo/trip segments and outside air temperature segment blink five
times.

The Gauge Drive Circuit Check

When entering the self-diagnosis mode, the speedometer, the tachometer, the fuel gauge, and the coolant
temperature gauge needles sweep from the minimum position to maximum position, then return to the
minimum position.

2004 Acura TSX

2004 ACCESSORIES & EQUIPMENT Gauges & Indicators - TSX

The check cannot be started again until the gauge needles return to the minimum position. If a needle fails to
sweep or the beeper does not sound, replace the gauge control module.

Fig. 4: The Gauge Drive Circuit Check

The Communication Line Check

While in the self-diagnosis mode, the Communication Line Check starts after the odo/trip LCD Segments
Check. If all segments come on, the communication line is OK.

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If the word "Error 1" is indicated, there is a malfunction in the communication line between the gauge
control module and the frame-controller area network (F-CAN). Check for DTCs in the ECM/PCM. If no
DTCs are found, go to B-CAN System Diagnosis Test Mode A (see B-CAN SYSTEM DIAGNOSIS
TEST MODE A ).

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If the word "Error 2" is indicated, there is a malfunction in the communication line between the gauge
control module and the body-controller area network (B-CAN). Go to B-CAN System Diagnosis Test
Mode A (see B-CAN SYSTEM DIAGNOSIS TEST MODE A ).

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If the word "Error 3" is indicated, there is a malfunction in the communication line between the gauge
control module and the body-controller area network (B-CAN) and the frame-controller area network (F-
CAN). Check for DTCs in the ECM/PCM. If no DTCs are found, go to B-CAN System Diagnosis Test
Mode A (see B-CAN SYSTEM DIAGNOSIS TEST MODE A ).

NOTE:

After the beeper stops sounding and the gauge needles return to the minimum
position, pushing the trip/reset button starts the Beeper Drive Circuit Check
(one beep) and the Gauge Drive Circuit Check again.

2004 Acura TSX

2004 ACCESSORIES & EQUIPMENT Gauges & Indicators - TSX