Acura CSX. Instruction — page 131

21

11

YES

NO

YES

NO

11-198

PGM-FI System

ECM/PCM CONNECTOR A (44P)

CANL (RED)

CANH (WHT)

ECM/PCM CONNECTOR A (44P)

CANL (RED)

CANH (WHT)

34. Measure the resistance between ECM/PCM

connector terminals A36 and A37.

Go to step 35.

Substitute a known-good SRS unit (see page

24-203). If the HDS identifies the vehicle, replace
the original SRS unit (see page 24-203).

35. Disconnect SRS unit connector A (28P).

36. Reconnect EPS control unit connector D (28P).

37. Measure the resistance between ECM/PCM

connector terminals A36 and A37.

• With TPMS: Go to step 38.
• Without TPMS: Update the ECM/PCM if it does

not have the latest software (see page 11-227), or
substitute a known-good ECM/PCM (see page
11-7), then recheck. If the symptom/indication
goes away with a known-good ECM/PCM,
replace the original ECM/PCM (see page 11-228).

Substitute a known-good EPS control unit

(see page 17-84). If the HDS identifies the vehicle,
replace the original EPS control unit (see page
17-84).

Terminal side of female terminals

Terminal side of female terminals

Is ther e about 2.34

2.86 k

?

Is ther e about 2.34

2.86 k

?

08/08/21 14:21:52 61SNR030_110_0198

12

YES

NO

11-199

ECM/PCM CONNECTOR A (44P)

CANL (RED)

CANH (WHT)

38. Disconnect EPS control unit connector D (28P).

39. Reconnect the TPMS control unit 20P connector.

40. Measure the resistance between ECM/PCM

connector terminals A36 and A37.

Update the ECM/PCM if it does not have the

latest software (see page 11-227), or substitute a
known-good ECM/PCM (see page 11-7), then
recheck. If the symptom/indication goes away with
a known-good ECM/PCM, replace the original ECM/
PCM (see page 11-228).

Substitute a known-good TPMS control unit

(see page 18-75). If the HDS identifies the vehicle,
replace the original TPMS control unit (see page
18-75).

41. Disconnect the gauge control module (tach) 36P

connector (see page 22-277).

42. Disconnect the ABS modulator-control unit 25P

connector (see page 19-90) (or the VSA modulator-
control unit 37P connector (see page 19-171) and
the yaw rate-lateral acceleration sensor 5P
connector (see page 19-169)).

43. Disconnect SRS unit connector A (28P) (see page

24-203).

44. Disconnect EPS control unit connector D (28P)

(see page 17-84).

45. With TPMS: Disconnect the TPMS control unit 20P

connector (see page 18-75).

Terminal side of female terminals

Is ther e about 2.34

2.86 k

?

08/08/21 14:21:53 61SNR030_110_0199

*02

24

YES

NO

YES

NO

11-200

PGM-FI System

ECM/PCM CONNECTOR A (44P)

CANH (WHT)

ECM/PCM CONNECTOR A (44P)

CANL (RED)

46. Check for continuity between ECM/PCM connector

terminal A36 and body ground.

Repair short in the wire between the ECM/

PCM connector terminal A36 and the gauge control
module (tach), the ABS modulator-control unit, the
VSA modulator-control unit, the yaw rate-lateral
acceleration sensor, the SRS unit, the EPS control
unit, the TPMS control unit (with TPMS), or the
DLC.

Go to step 47.

47. Check for continuity between ECM/PCM connector

terminal A37 and body ground.

Repair short in the wire between ECM/PCM

connector terminal A37 and the gauge control
module (tach), the ABS modulator-control unit, the
VSA modulator-control unit, the yaw rate-lateral
acceleration sensor, the SRS unit, the EPS control
unit, the TPMS control unit (with TPMS), or the
DLC.

Go to step 48.

Terminal side of female terminals

Terminal side of female terminals

Is ther e continuity?

Is ther e continuity?

08/08/21 14:21:53 61SNR030_110_0200

YES

NO

YES

NO

YES

NO

YES

NO

11-201

48. Reconnect all connectors.

49. Connect the HDS to the DLC (see page 11-3).

50. Disconnect the gauge control module (tach) 36P

connector.

51. Turn the ignition switch to ON (II), and read the

HDS.

Replace the gauge control module (tach)

(see page 22-277).

• With ABS: Go to step 52.
• With VSA system: Go to step 56.

52. Turn the ignition switch to LOCK (0).

53. Reconnect the gauge control module (tach) 36P

connector.

54. Disconnect the ABS modulator-control unit 25P

connector.

55. Turn the ignition switch to ON (II), and read the

HDS.

Replace the ABS modulator-control unit

(see page 19-90).

Go to step 64.

56. Turn the ignition switch to LOCK (0).

57. Reconnect the gauge control module (tach) 36P

connector.

58. Disconnect the VSA modulator-control unit 37P

connector.

59. Turn the ignition switch to ON (II), and read the

HDS.

Replace the VSA modulator-control unit

(see page 19-171).

Go to step 60.

60. Turn the ignition switch to LOCK (0).

61. Reconnect the VSA modulator-control unit 37P

connector.

62. Disconnect the yaw rate-lateral acceleration sensor

5P connector.

63. Turn the ignition switch to ON (II), and read the

HDS.

Replace the yaw rate-lateral acceleration

sensor (see page 19-169).

Go to step 64.

Does the HDS identif y the vehicle?

Does the HDS identif y the vehicle?

Does the HDS identif y the vehicle?

Does the HDS identif y the vehicle?

08/08/21 14:21:53 61SNR030_110_0201

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