Test F: The Power Supply Relay Is Inoperative - All Switched System Power (SSP) Features

PINPOINT TEST F: THE POWER SUPPLY RELAY IS INOPERATIVE - ALL SWITCHED SYSTEM POWER (SSP) FEATURES

F1:

F1-F3:

F4-F7:

F8:

Normal Operation
Battery voltage is supplied to the SSP relays through the battery junction box (BJB). Ground for the SSP relay coils is controlled by the front electronic module (FEM) and the rear electronic module (REM) through the following circuits: 31S-DG51 (BK/YE), 31S-DG55 (BK/RD), 31S-DG57 (BK/YE), 31S-DG53 (BK/OG), 31S-DK21 (BK/WH) and 31S-DK30 (BK/OG). All of these circuits are spliced together so that either the FEM or the REM can ground this circuit and energize the SSP relays.

Possible Causes
- Fuse
- Circuit 31S-DG51 (BK/YE) short to voltage
- Circuit 31S-DG55 (BK/RD) short to voltage
- Circuit 31S-DG57 (BK/YE) short to voltage
- Circuit 31S-DG53 (BK/OG) short to voltage
- Circuit 31S-DK21 (BK/WH) short to voltage
- Circuit 31S-DK30 (BK/OG) short to voltage
- SSP relay
- BJB
- FEM
- REM