Acura RL. Manual - part 538

ENTERING THE SELF-DIAGNOSTIC FUNCTION

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

1. Push and hold the SELECT/RESET button.

2. Turn the lighting switch ( ) ON.

3. Turn the ignition switch ON (II).

4. Within 5 sec, turn the lighting switch ( ) OFF, then ON and OFF again.

5. Within 5 sec, release the SELECT/RESET button, and then push and release the button three times

repeatedly.

THE INDICATOR DRIVE CIRCUIT CHECK

When entering the self-diagnostic mode, these indicators blink:

Seat belt indicator, charging system indicator, low fuel indicator, oil pressure indicator, high beam indicator,
VSA indicator, VSA activation indicator, brake system indicator, fog light indicator, lights on indicator,
malfunction indicator lamp (MIL), A/T gear position indicator, ABS indicator, SH-AWD indicator, AFS
indicator, security indicator, message indicator, tire pressure indicator, ECPS indicator, cruise main
indicator, ACC indicator, CMBS indicator and cruise set indicator.

SWITCH INPUT CHECK

After the intermittent beeper sounds at the initial stage of self-diagnosis, a beeper sounds continuously while

NOTE:

Indicators are also controlled via the communication line.

NOTE:



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



While in the self-diagnostic mode, the SELECT/RESET button is used to
start the Beeper Drive Circuit Test and the Gauge Drive Circuit Check.



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

Fig. 3: Ignition Switch Self-Diagnostic Mode Chart
Courtesy of AMERICAN HONDA MOTOR CO., INC.

2007 Acura RL

2005-08 ACCESSORIES AND EQUIPMENT Gauges - RL

Friday, June 05, 2009 3:33:40 PM

Page 3

any of the following switch inputs are switched from OFF to ON:

Parking brake switch, VSA OFF switch, cruise control master, SET, RESUME, CANCEL switches, select,
previous, next switches, DISTANCE switch A, DISTANCE switch B, CMBS OFF switch, and dash lights
brightness controller (VOL (+), VOL(-)).

THE BEEPER DRIVE CIRCUIT CHECK

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

THE LCD [SPORT SHIFT AND MULTI-INFORMATION DISPLAY (MID)] SEGMENT CHECK

When entering the self-diagnostic mode, the word "Checking Now" shows on the MID.

THE GAUGE DRIVE CIRCUIT CHECK

When entering the self-diagnostic 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.

Fig. 4: Select Switch Self-Diagnostic Mode Chart
Courtesy of AMERICAN HONDA MOTOR CO., INC.

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

THE COMMUNICATION LINE CHECK

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

NOTE:

After the beeper stops sounding and the gauge needles return to the
minimum position, pushing the select/reset button starts the Beeper Drive
Circuit Check (one beep) and the Gauge Drive Circuit Check again. The
check cannot be started again until the gauge needles return to the minimum
position.

2007 Acura RL

2005-08 ACCESSORIES AND EQUIPMENT Gauges - RL

Friday, June 05, 2009 3:33:40 PM

Page 4

Fig. 5: LCD Segment Display - Checking Now
Courtesy of AMERICAN HONDA MOTOR CO., INC.

If the communication line is OK, the word "OK" will be indicated on the multi-information display (MID).
If there is a communication line error, the word "NG" will be indicated on the MID.

Indication pattern

There is a malfunction in the communication line between the F-CAN and gauge control module. The B-
CAN is OK at this time. Check for DTCs in the PCM and troubleshoot any DTCs found. If no DTCs are
found, go to B-CAN System Diagnosis Test Mode A (see TROUBLESHOOTING - B-CAN SYSTEM
DIAGNOSIS TEST MODE A ).

Fig. 6: LCD Segment Display - Communication Check
Courtesy of AMERICAN HONDA MOTOR CO., INC.

There is a malfunction in the communication line between the B-CAN and gauge control module. The F-
CAN line is OK at this time. Go to B-CAN System Diagnosis Test Mode A (see TROUBLESHOOTING -
B-CAN SYSTEM DIAGNOSIS TEST MODE A ).

Fig. 7: LCD Segment Display - Communication Check
Courtesy of AMERICAN HONDA MOTOR CO., INC.

There is a malfunction in the communication line between the gauge control module and F-CAN and B-
CAN. Check for DTCs in the PCM and troubleshoot any DTCs found. If no DTCs are found, go to B-CAN
System Diagnosis Test Mode A (see TROUBLESHOOTING - B-CAN SYSTEM DIAGNOSIS TEST
MODE A ).

Fig. 8: LCD Segment Display - Communication Check
Courtesy of AMERICAN HONDA MOTOR CO., INC.

ENDING THE SELF-DIAGNOSTIC FUNCTION

Turn the ignition switch OFF.

NOTE:

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

2007 Acura RL

2005-08 ACCESSORIES AND EQUIPMENT Gauges - RL

Friday, June 05, 2009 3:33:40 PM

Page 5

CIRCUIT DIAGRAM

Fig. 9: Gauges - Circuit Diagram (1 Of 7)
Courtesy of AMERICAN HONDA MOTOR CO., INC.

ends.

2007 Acura RL

2005-08 ACCESSORIES AND EQUIPMENT Gauges - RL

Friday, June 05, 2009 3:33:40 PM

Page 6

Content .. 536 537 538 539 ..