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TROUBLESHOOTING INDEX (WATER HEATER SYSTEM)

BME070301038216

No. | TROUBLESHOOTING ITEM | ACTION
--- | --- | ---
1 | Fuel odor | • Inspect the water heater system in the vehicle fuel system. • Inspect the fuel line for leakage, kinks, or blockage. • If normal, there is an internal water heater leak.

  - Replace the water heater unit.

2 | The heater does not achieve full load operation | • Replace the water heater unit.
3 | Continuous white smoke during combustion operation | • Replace the water heater unit.
4 | Loss of coolant (leakage). Heater develops smoke during combustion operation; smell of exhaust fumes extremely sweet | • Inspect the coolant hose for leakage, kinks, looseness, and loose hose clamps. • If normal, there is an internal water heater leak.

  - Replace the water heater unit.

5 | Loss of fuel (leakage) | • Inspect the water heater system integration in the vehicle's fuel system. • Inspect the fuel line connections for leakage. • If normal, there is an internal water heater leak.

  - Replace the water heater unit.

6 | The water heater unit does not communicate with the SST (WDS or equivalent) | • Refer to section T, ON-BOARD DIAGNOSTIC [MULTIPLEX COMMUNICATION SYSTEM].