Test M: The Fire Suppression System Indicator Is Always On (Police Vehicles Only)

PINPOINT TEST M: THE FIRE SUPPRESSION SYSTEM INDICATOR IS ALWAYS ON (POLICE VEHICLES ONLY)

Normal Operation
The fire suppression module is hardwired to the instrument cluster (IC) through circuit 2318 (LG/RD), and is grounded through circuit 1203 (LG/RD). If a fault occurs in the fire suppression system, a DTC is set and the fire suppression module grounds circuit 2318 (LG/RD) to illuminate the fire suppression system indicator. The fire suppression module connector is equipped with a shorting bar that grounds circuit 2318 (LG/RD) when the fire suppression module is disconnected to illuminate the fire suppression system indicator.

- DTC B29B3 (Fire Suppression Indicator Lamp Circuit Failure) - is a continuous and on-demand DTC that sets if the fire suppression module detects a short to ground on the fire suppression indicator lamp (FSIL) circuit 2318 (LG/RD).

This pinpoint test is intended to diagnose the following:
- Wiring, terminals or connectors
- Fire suppression module
- Instrument cluster (IC)

M1:

M2-M6:

M6 Continued: