ignition ACURA CSX 2006 Service Repair Manual
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Page 2221 of 2893
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22-271
Gauge Control Module (Tach) Input Test
GAUGE CONTROL MODULE (TACH) 36P CONNECTOR
GRY BLU
BRN YEL PUR
REDBLK
WHT
LT GRN GRNRED BLK
BRN
LT GRN
BLU
NOTE: Before testing, do the gauge control module self-diagnosis function, and make sure the B-CAN communication
line and the UART line are OK.
1. Turn the ignition switch to LOCK (0).
2. Remove the gauge control module (tach) and disconnect the 36P connector from it (see page 22-277).
3. Inspect the connector and socket terminals to be sure they are all making good contact. If the terminals are bent, loose or corroded, repair them as necessary, and recheck the system.
IftheterminalsareOK,gotostep4.
(cont’d)
Wire side of female terminals
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Page 2222 of 2893
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¦§
¦§
µ
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Cavity Wire Test condition
Test: Desired result Possible cause if desired result
is not obtained
Cavity Wire Test condition Test: Desired result Possible cause if desired result
is not obtained
22-272Gauges
Gauge Control Module (Tach) Input Test (cont’d)
4. With the connector still disconnected, do these input tests at the following connector.
If any test indicates a problem, find and correct the cause, then recheck the system.
If all the input tests prove OK, go to step 5.
20
2 LT GRN
GRY Disconnect the
gauge control
module (speedo)
12P connector Check for continuity between
terminal No. 20 No. 2 and
gauge control module (speedo)
12P connector terminal No. 7
No. 1 :
There should be continuity. An open in the wire
Check for continuity to ground:
There should be no continuity. A short to ground in the wire
13 RED Combination light switch ON Attach to ground:
The illuminations of the seat
heater switches and the
ambient light should come on
full bright. Faulty LEDs
An open in the wire
14 RED Combination light switch ON Attach to ground:
The illuminations of the dash
lights, the audio unit, the
steering wheel switches, and
the climate control unit lights
should come on full bright. Faulty LEDs
An open in the wire
: TYPE S model
5. Reconnect the connector to the gauge control module (tach), and do these input tests at the following connector. If any test indicates a problem, find and correct the cause, then recheck the system.
If all the input tests prove OK, the gauge control module (tach) must be faulty; replace it.
15 BLK Under all
conditions Measure the voltage to ground:
There should be less than 0.5 V. Poor ground (G503)
An open in the wire
16 BLK Under all conditions Measure the voltage to ground:
There should be less than 0.5 V. Poor ground (G504)
An open in the wire
17 BRN Ignition switch ON (II) Measure the voltage to ground:
There should be battery voltage. Blown No. 10 (7.5 A) fuse in
the under-dash fuse/relay box
An open in the wire
18 WHT Under all conditions Measure the voltage to ground:
There should be battery voltage.
An open in the wire
4 BRN Ignition switch ON (II), ILLUMI ( )
button pressed Measure the voltage to ground:
There should be less than 1 V.
Poor ground (G501)
Faulty dash light brightness
controller and odometer
select/reset switch
An open in the wire
Ignition switch ON
(II), ILLUMI ( )
button released Measure the voltage to ground:
There should be more than 5 V.
Faulty dash light brightness
controller and odometer
select/reset switch
A short to ground in the wire
Blown No. 23 (10 A) fuse in the
under-hood fuse/relay box
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Page 2223 of 2893
´
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Cavity Wire Test condition Test: Desired result Possible cause if desired result
is not obtained
22-273
5 YEL Ignition switch ON
(II), ILLUMI ( )
button pressed Measure the voltage to ground:
There should be less than 1 V.
Poor ground (G501)
Faulty dash light brightness
controller and odometer
select/reset switch
An open in the wire
Ignition switch ON
(II), ILLUMI ( )
button released Measure the voltage to ground:
There should be more than 5 V.
Faulty dash light brightness
controller and odometer
select/reset switch
A short to ground in the wire
6 BLU Ignition switch ON (II), SELECT/RESET
button pressed Measure the voltage to ground:
There should be less than 1 V.
Poor ground (G501)
Faulty dash light brightness
controller and odometer
select/reset switch
An open in the wire
Ignition switch ON
(II), SELECT/RESET
button released Measure the voltage to ground:
There should be more than 5 V.
Faulty dash light brightness
controller and odometer
select/reset switch
A short to ground in the wire
7 PUR Ignition switch ON (II), km/h-mph
button pressed Measure the voltage to ground:
There should be less than 1 V.
Poor ground (G501)
Faulty dash light brightness
controller and odometer
select/reset switch
An open in the wire
Ignition switch ON
(II), km/h-mph
button released Measure the voltage to ground:
There should be more than 5 V.
Faulty dash light brightness
controller and odometer
select/reset switch
A short to ground in the wire
8 BLU Ignition switch ON (II), washer fluid is
half or more in the
washer reservoir Measure the voltage to ground:
There should be more than 5 V.
Faulty washer fluid level
switch
A short to ground in the wire
Ignition switch ON
(II), washer fluid is
empty in the
washer reservoir Measure the voltage to ground:
There should be less than 1 V.
Poor ground (G401)
Faulty washer fluid level
switch
An open in the wire
27 GRN Ignition switch ON (II), brake fluid is
full level in the
reservoir Measure the voltage to ground:
There should be less than 1 V.
Poor ground (G401)
Faulty brake fluid level switch
An open in the wire
Ignition switch ON
(II), brake fluid is
lower level in the
reservoir Measure the voltage to ground:
There should be more than 5 V.
Faulty brake fluid level switch
A short to ground in the wire
28 LT GRNIgnition switch ON
(II), parking brake
lever pulled Measure the voltage to ground:
There should be less than 1 V.
Faulty parking brake switch
An open in the wire
Ignition switch ON
(II), parking brake
lever released Measure the voltage to ground:
There should be more than 5 V.
Faulty parking brake switch
A short to ground in the wire
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Page 2224 of 2893
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22-274Gauges
Gauge Control Module (Speedo) Input Test
GAUGE CONTROL MODULE (SPEEDO) 12P CONNECTOR
LT GRN BLUGRN
GRY
BLKBRN
WHT
NOTE: Before testing, do the gauge control module self-diagnosis function, and make sure the B-CAN communication
line and the UART line are OK.
1. Turn the ignition switch to LOCK (0).
2. Remove the gauge control module (speedo) and disconnect the 12P connector from it (see page 22- 277).
3. Inspect the connector and socket terminals to be sure they are all making good contact. If the terminals are bent, loose or corroded, repair them as necessary, and recheck the system.
IftheterminalsareOK,gotostep4.
Wire side of female terminals
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¦§ ¦§
¦§ Cavity Wire Test condition
Test: Desired result Possible cause if desired result
is not obtained
Cavity Wire Test condition Test: Desired result Possible cause if desired result
is not obtained
22-275
4. With the connector still disconnected, do these input tests at the following connector.
If any test indicates a problem, find and correct the cause, then recheck the system.
If all the input tests prove OK, go to step 5.
11 BLU Ignition switch ON,
turn signal switch
in LEFT Measure the voltage to ground:
There should be battery voltage
when the lights are flashing. Faulty MICU
Faulty combination light
switch
An open in the wire
12 GRN Ignition switch ON, turn signal switch
in RIGHT Measure the voltage to ground:
There should be battery voltage
when the lights are flashing. Faulty MICU
Faulty combination light
switch
An open in the wire
7
1 LT GRN
GRY Disconnect the
gauge control
module (tach) 36P
connector Check for continuity between
terminal No. 7 No. 1 and
gauge control module (tach)
36P connector terminal No. 20
No. 2 :
There should be continuity. An open in the wire
Check for continuity between
terminal No. 7 No. 1 and
body ground (gauge control
module (tach) 36P connector
disconnected):
There should be no continuity. A short to ground in the wire
: TYPE S model
5. Reconnect the connector to the gauge control module (speedo), and do these input tests at the following connector.
If any test indicates a problem, find and correct the cause, then recheck the system.
If all the input tests prove OK, the gauge control module (speedo) must be faulty; replace it.
6 WHT Under all
conditions Measure the voltage to ground:
There should be battery voltage. Blown No. 23 (10 A) fuse in
the under-hood fuse/relay
box
An open in the wire
5 BRN Ignition switch ON (II) Measure the voltage to ground:
There should be battery voltage. Blown No. 10 (7.5 A) fuse in
the under-dash fuse/relay box
An open in the wire
4 BLK Under all conditions Measure the voltage to ground:
There should be less than 0.5 V. Poor ground (G504)
An open in the wire
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Page 2226 of 2893
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Release Locked odometer mileage to the
original gauge control module.
22-276 Gauges
Rewriting the ODO Data and Transferring the Maintenance Minder Data to a
New Gauge Control Module
NOTE:
Obtain a new gauge control module before starting the rewriting process.
Rewriting is not possible on a gauge control module that will not communicate with the HDS.
Make sure that the HDS shows the correct VIN for the car you are working on.
One you have started this procedure, you must complete it before removing the HDS from the DLC.
Connect a battery jump box (not a Battery charger) to insure that correct battery voltage will be maintained.
1. Before replacing the gauge control module, connect the HDS.
2. Select GAUGES from the BODY ELECTRICAL menu display.
3. Select ‘‘Gauge Control M odule Replacement (ODO
rewrite)’’ from the ADJUSTMENT menu, and follow
the instructions on the display to retrieve the ODO
data and the Maintenance Minder information.
4. Replace the gauge control module.
5. Follow the instructions on the display to write the new ODO data and Maintenance Minder data to a
new gauge control module. If the data transfer fails,
refer to the instructions below to release the locked
ODO data. If after you attempt to transfer mileage the odometer
has dashes ( ), garbled, or incorrect value
displayed, do the following start over. The original
gauge control module is going to be unlocked and
restored to its original state.
1. Confirm that you have the latest HDS version of software.
2. Make sure that the HDS shows the correct VIN for the car you are working on.
3. With the ignition switch to LOCK (0), reconnect the original gauge assembly.
4. Completely re-boot the HDS.
5. Clear any stored DTCs.
6. Navigation to Body. Electric/Gauges/Adjustment/Instrument Panel
Replacement.
7. Select ‘‘3. Releasing Locked ODO Data’’.
8. Follow the prompts and the Odometer mileage will be restored.
9. Start over and make sure the screen prompts are followed.
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Page 2229 of 2893
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Description
Outside Air Temperature Indicator Logic Update to the outside air temperature
indicator while driving
Troubleshooting
22-279
Outside Air Temperature Indicator Calibration
The outside temperature sensor is located behind the
center of the front bumper. The gauge control module
(tach) uses measurements from this sensor to display
the outside air temperature.
Because of the location of the sensor, it may be affected
by heat reflection from the road, engine and radiator
heat or hot exhaust from surrounding traffic.
These conditions can heat soak the outside air
temperature sensor and cause inaccurate readings.
Logic has been written into the gauge control module
(tach) to help prevent abnormal or fluctuating outside
air temperature indicator readings.
Initial outside air temperature indication after the
ignition switch is turned to ON (II).
If the engine coolant temperature is 60 °C (140 °F) or higher when the ignition switch is turned to ON (II),
the outside air temperature indicated the last time the
key was turned off will be displayed regardless of the
current temperature measured by the outside air
temperature sensor.
If the engine coolant temperature is 59 °C (139 °F) or lower when the ignition switch is turned to ON (II), the
current temperature measured by the outside air
temperature sensor will be indicated. If the temperature measured by the outside air
temperature sensor is greater than the temperature on
the outside air temperature indicator, the outside air
temperature indicator will increase by 1 °C (1.8 °F) per
minute after the vehicle speed is greater than 30 km/h
(19 mph) for more than 1 minute and 30 seconds. It will
continue to increase until the current outside air
temperature is indicated. So, the first change to the
outside air temperature indicator is 1 minute and
30 seconds after the vehicle speed is greater than
30 km/h (19 mph). If the vehicle speed drops below
30 km/h (19 mph), the indicator will not update again
until the vehicle speed is increased to 30 km/h (19 mph)
or more for more than 1 minute and 30 seconds again.
If the outside air temperature is less than the indicated
temperature, the temperature will decrease 1 °C every
2 seconds (1 °F
every 1.1 seconds) until the current
outside air temperature is indicated regardless of
vehicle speed.
If the indicator displays ‘‘ ’’ for more than 2
seconds after selecting the outside air temperature
display mode, check the outside air temperature sensor
(see page 21-68), or gauge control module self-
diagnosis (see page 22-241).
(cont’d)
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Calibration
Example:
Incorrect value = 20 °C (68 °F)
Desired correction value = 1 °C ( 2 °F)
Correct value = 21 °C (70 °F)
Desired correction value = 1 °C ( 2 °F)
Correct value = 19 °C (66 °F)
22-280 Gauges
Outside Air Temperature Indicator Calibration (cont’d)
B
A
C
The outside air temperature indicator’s displayed
temperature can be recalibrated 3 °C (or 5 °F) to
meet the client’s expectations. 1. Turn the ignition switch to ON (II).
2. Select the outside air temperature display.
3. Press and hold the SEL/RESET button until the trip meter resets, then release it. Press, and continue to
hold, the switch again, and the display will scroll
through temperature settings from 3 °C to 3 °C
(or 5 °F to 5 °F) as shown.
4. When the desired correction value appears on the display, release the button, and the recalibrated
outside air temperature will be displayed.
NOTE: To recalibration temperature is not the value
the sensor sees. Therefore the temperature can
only be adjusted degrees from the sensor. NOTE: To recalibrate the display to the true
temperature, remove the outside air temperature
sensor (A), but leave it connected. Submerge the sensor
and a thermometer (B) in a container of ice water (C).
Select the calibration mode as described above, then
recalibrate the display to the true temperature.
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Page 2231 of 2893
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22-281
Reminder Systems
Component Location Index
GAUGE CONTROL MODULE (TACH)
MICU COMBINATION LIGHT SWITCH
IGNITION KEY SWITCH PARKING BRAKE SWITCH SRS UNIT
DRIVER’S DOOR SWITCH FRONT SEAT BELT
BUCKLE SWITCHES
Input Test, page 22-271
Input Test, page 22-284 Test/Replacement, page 22-166
Test, page 22-72 Test, page 19-11
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22-282 Reminder Systems
Circuit Diagram
MICU
ORN
(10 A) No. 23
BLK1 2
SRS UNIT
G602
B11
A12
A11 YEL
WHT REDRED
WHT
ORN28
LT GRN BLK16
G504
INDICATOR DRIVE CIRCUIT
MICU
ECM/PCM MAIN CIRCUIT
21
PNK
124
CAN L
CAN H
CHIME
WHT
BRN
RED 19
1
WHT No. 2 (IG) (50 A)
GAUGE CONTROL MODULE (TACH) 18
17
IG1
BAT
BLU
WHT
UNDER-HOOD FUSE/RELAY BOX
BATTERY IGNITION SWITCH
No. 1 (BAT) (100 A)
(7.5 A) No. 10UNDER-DASH
FUSE/RELAY
BOX
DRIVE
CIRCUIT
PARKING
BRAKE
REMINDER
SEAT
BELT
REMINDER
KEY-IN
REMINDER
F-CAN
TRANSCEIVER B-CAN
TRANSCEIVERLIGHTS-ON
INDICATOR
(LED)
IG1 HOT in ON (II)
and START (III)
ABS MODULATOR-
CONTROL UNIT*1 LIGHTS-ON INDICATOR
DIMMING CIRCUIT
PARKING
BRAKE
SWITCH
(Closed:
Lever pulled)
DRIVER’S
SEAT BELT
BUCKLE
SWITCH
(Closed:
unbuckled) SEAT BELT
REMINDER
INDICATOR
(LED)
BRAKE
SYSTEM
INDICATOR
(LED)COMPULSORY
TURNING-ON
CIRCUIT
LIGHTS-ON
REMINDER
CLIMATE
CONTROL
UNIT
IMMOBILIZER-
KEYLESS
CONTROL UNIT
HANDSFREELINK
CONTROL UNIT*4
H1
D4 D2
Q1 Q9
G2 :CANline
1
VSA MODULATOR-
CONTROL UNIT*2
YAW RATE-LATERAL
ACCELERATION SENSOR*2
DATA LINK CONNECTOR
EPS CONTROL UNIT
TPMS CONTROL UNIT*3 10 V
STABILIZING
CIRCUIT
*1: ’06 07 Touring and Premium models
*2: ’07 TYPE S and ’08 09 models
*3: ’08 09 models
*4: ’09 model with navigation system
MICU
A
B
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