Acura CSX. Manual — part 556
*01
SNR9A00J22100030053FCAT00
22-271
Gauge Control Module (Tach) Input Test
GAUGE CONTROL MODULE (TACH) 36P CONNECTOR
GRY
BLU
BRN
YEL
PUR
RED
BLK
WHT
LT GRN
GRN
RED
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.
• If the terminals are OK, go to step 4.
Wire side of female terminals
08/08/21 14:35:58 61SNR030_220_0273
[ ]
[
]
[
]
[
]
[ ]
−
−
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
22-272
Gauges
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
08/08/21 14:35:58 61SNR030_220_0274
+
+
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
GRN
Ignition 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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02
SNR9A00J22100030053FCAT01
22-274
Gauges
Gauge Control Module (Speedo) Input Test
GAUGE CONTROL MODULE (SPEEDO) 12P CONNECTOR
LT GRN
BLU
GRN
GRY
BLK
BRN
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.
• If the terminals are OK, go to step 4.
Wire side of female terminals
08/08/21 14:35:59 61SNR030_220_0276
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