Test J: The Fire Suppression Module Does Not Respond To The Scan Tool

PINPOINT TEST J: THE FIRE SUPPRESSION MODULE DOES NOT RESPOND TO THE SCAN TOOL

J1:

J2-J4:

J5-J6:

Normal Operation
The fire suppression module communicates with the scan tool through the international standards organization (ISO) 9141 communications network circuit 70 (LB/WH). The fire suppression module also communicates with the powertrain control module (PCM) via the controller area network (CAN) circuits 1827 (WH/LG) and 1828 (PK/LG). Voltage for the fire suppression module is supplied on circuit 2319 (RD/YE). Ground is supplied through the module chassis and through circuit 1203 (BK/LB).

Possible Causes
- Fuse
- Circuit 70 (LB/WH) open
- Circuit 1203 (BK/LB) open
- Circuit 1827 (WH/LG) open (HS-CAN +)
- Circuit 1828 (PK/LG) open (HS-CAN -)
- Circuit 2319 (RD/YE) open
- Fire suppression module