Test G

PINPOINT TEST G: THE AUDIO CONTROL MODULE (ACM) DOES NOT RESPOND TO THE DIAGNOSTIC TOOL

Test G1-G2:

Test G2-G3:

Test G3-G4:

Test G5:

Normal Operation
The ACM module communicates with the diagnostic tool through the SCP communications network circuits 4-EG10 (GY/BK) and 5-EG10 (BU/YE). If one of the bus wires becomes shorted to ground or voltage, or if some but not all termination resistors are lost, communications can continue. Check circuits 4-EG10 (GY/BK) and 5-EG10 (BU/YE) between the ACM C240c and the DLC C251. Total resistance values must not be more than 5 ohms. If the resistance is more than 5 ohms, there is either an open in circuits 4-EG10 (GY/BK) and 5-EG10 (BU/YE), damage to the DLC C251, the ACM C240c, or in joint connector No.4 C223.

Possible Causes
- circuits 4-EG10 (GY/BK) and 5-EG10 (BU/YE) shorted to ground or open
- C240c
- joint connector No.4 C223
- DLC C251
- ACM