Test K: DTCs B29AF, B29B0, B29B1 and B29B2 - Fire Suppression Manual Switch Failure

PINPOINT TEST K: DTCS B29AF, B29B0, B29B1 AND B29B2 - FIRE SUPPRESSION MANUAL SWITCH FAILURE

K1-K2:

K2-K4:

K4-K6:

K6-K7:

K8-K10:

K11-K13:

K13-K14:

Normal Operation
The fire suppression module (FSM) checks the fire suppression manual switch circuits for faults. If the FSM detects an open or a short to ground on circuit 2315 (BK/PK), it stores diagnostic trouble code (DTC) B29AF in memory and illuminates the fire suppression system indicator. If the FSM detects a short to voltage on circuit 2315 (BK/PK), it stores DTC B29B0 in memory and illuminates the fire suppression system indicator. If the FSM detects an open or a short to voltage on circuit 2314 (LB/BK), it stores DTC B29B1 in memory and illuminates the fire suppression system indicator. If the FSM detects a short to ground on circuit 2314 (LB/BK), it stores DTC B29B2 in memory and illuminates the fire suppression system indicator.

Possible Causes
- fuse
- circuit 2314 (LB/BK) open, short to ground, or short to voltage
- circuit 2315 (BK/PK) open, short to ground, or short to voltage
- fire suppression manual switch
- fire suppression manual switch wiring harness
- FSM