Question 1

What is the Evaporative System Integrity Monitor (ESIM) System?

Accepted Answer

The Evaporative System Integrity Monitor (ESIM) system is used on Chrysler, Dodge, Jeeps, Rams and Fiats.

Question 2

How does the ESIM perform tests?

Accepted Answer

The ESIM conducts tests on the evaporative system as follows: An engine off, non-intrusive test for small leaks and an engine running, intrusive test for medium/large leaks.

Question 3

What are ESIM diagnostic checks?

Accepted Answer

Inspect for loose gas cap
Inspect hoses for cracks, leaks and proper routing and attachment
Check purge solenoid function with scan tool or jumper wires
Check purge solenoid for mechanical leakage
Check ESIM switch Circuits
Check ESIM internal switch with vacuum pump
Perform a ssmoke/flow test

Question 4

What are the Evaporative System Integrity Monitor (ESIM) components?

Accepted Answer

Purge solenoid
Charcoal canister
ESIM assembly
Fuel Tank Pressure sensor