NHTSA ID Number: 10214310
Manufacturer Communication Number: DSM.0054
TSB/Document Date: 2022-06-21
Summary
Service manual
for Hexagon Agility® 488LPI propane autogas (LPG) fuel storage system and evaporative emissions system components.
Fuel Storage and EVAP System
Page 24 of 35
D. Make-up air line, engine to EVAP canister
1. Remove make-up air line (not shown)
from make-up air line fitting (11) on intake
air tube (17). Figure 7
2. Remove make-up air line (15) from quick
connect fitting (1) on EVAP pump module
(12) . Figure 8
3. Loosen P-clamps (20) to release makeup air line (15). Figure 8 Refer to OEM
procedure.
11
17
Figure 7: Make-up air line fitting (11),
intake air tube (17).
20
15
1
12
Figure 8: Make-up air line (15), quick connect
fitting (1), EVAP pump module (12),
P-clamps (20).
DSM.0054 Ver. 1.0 05/27/2022
488LPI Propane Autogas
Fuel Storage and EVAP System
Page 25 of 35
E. PCV line, EVAP module box to EVAP
canister
1. Remove PCV line, EVAP module box to
EVAP canister (18) from quick connects
(1) at EVAP module (12) and EVAP
canister (13). Figure 9
18
1
1
13
FRONT
12
Figure 9: EVAP pump module (12),
PCV line, engine to EVAP pump module (16),
EVAP canister (13).
DSM.0054 Ver. 1.0 05/27/2022
488LPI Propane Autogas
Fuel Storage and EVAP System
Page 26 of 35
F. PCV lines, EVAP pump module box top
to EVAP pump
1. Remove QTY: 4 fasteners securing
EVAP pump module () cover (19).
Figure 10
2. Remove PCV lines (22) from EVAP
pump (22) at quick disconnects (1).
Figure 11
21
FRONT
19
12
Figure 10. EVAP pump module box (12),
cover (19), fasteners (21).
1
FRONT
23
1
22
12
Figure 11: EVAP module box (12), quick connect
fittings (1), EVAP pump (22).
DSM.0054 Ver. 1.0 05/27/2022
488LPI Propane Autogas
Fuel Storage and EVAP System
Page 27 of 35
INSTALLATION PROCEDURE
7
1. Verify PCV line (not shown) connections
at PCV valve (10) and rear intake
manifold fitting (9) are securely fastened.
Figure 1
Gently position and secure lines and
fittings to avoid cracking the tubing or
weakening the connections.
2. Verify EVAP purge solenoid quick
connect fitting (16) and manifold fitting
(14) are securely fastened. Figure 2
3. Verify EVAP purge line quick connect
fitting (15) at EVAP purge solenoid (7) is
securely fastened. Figure 1
4. Verify make-up air line (16) quick
connect fitting at intake air tube (17) is
securely fastened. Figure 2
15
16
14
9
10
Figure 1: EVAP purge solenoid (7), purge
solenoid to EVAP purge line location (15), purge
solenoid fitting to intake location (16), purge line
fitting (14) location on intake manifold.
PCV intake fitting (11), PCV valve (10).
NOTE: Intake air tube not shown for clarity.
16
17
Figure 3: Make-up air line fitting (6) location on
intake air tube (17).
5. Verify PVC line (16) quick connect fittings
(1) at top of EVAP pump module (12) and
DSM.0054 Ver. 1.0 05/27/2022
488LPI Propane Autogas
Fuel Storage and EVAP System
Page 28 of 35
top of EVAP canister (13) are secure.
Figure 3
6. Verify EVAP purge line (14) quick
connect fittings (1) at EVAP canister (3)
a securely fastened. Figure 3
7. Verify make-up air line (15) quick
connect fitting (1) at EVAP canister (3)
is securely fastened. Figure 3
8. Verify PCV line quick connect fittings (19)
to EVAP pump (2) are securely fastened.
Figure 4
9. If removed: Install cover (19) on EVAP
module box (8). Figure 3.
10. Verify proper operation.
14
16
15
1
18
1
13
1
FRONT
19
12
Figure 3: EVAP pump module (12), cover (19),
PCV lines (5), quick connector fittings (1),
make-up air line (6), EVAP canister (3).
FRONT
1
22
12
Figure 4: EVAP pump module box (12, PCV line
quick connect fittings (1), EVAP pump (22).
DSM.0054 Ver. 1.0 05/27/2022
488LPI Propane Autogas
Fuel Storage and EVAP System
Page 29 of 35
EVAP Pump Replacement
DESCRIPTION AND OPERATION
The EVAP pump circulates propane vapors from the engine intake manifold via the PCV system
and the EVAP purge solenoid to the EVAP canister. The EVAP pump is controlled by the EVAP
module which is controlled by the electronic control module (ECM) using a ground side driver.
The EVAP pump powers on during the fuel purge cycle and anytime the engine is running. The
EVAP pump is located inside the EVAP module box on the passenger side frame rail.
REMOVAL PROCEDURE
1. Secure vehicle on an approved hoist.
2. Remove negative battery cable or, if
equipped: use battery disconnect switch
on battery box to shutoff vehicle power.
3. Raise vehicle.
4. Unplug chassis harness electrical
harness (not shown; refer to OEM
procedure) from EVAP plug electrical
connector (1) on bottom of EVAP box
(4). Figure 1
5. Remove four bolts (2) securing EVAP
module front cover (3). Figure 1
6. Remove EVAP pump module box front
cover (3). Figure 1
DSM.0054 Ver. 1.0 05/27/2022
4
2
3
1
Figure 1: EVAP pump module box (4), cover (3),
cover bolts (2), electrical connector (1).
488LPI Propane Autogas
Fuel Storage and EVAP System
Page 30 of 35
7. Disconnect PVC out line quick connect
adaptor (5). Figure 2
8. Disconnect PCV in purge line quick
connect adaptor (6). Figure 2
9. Remove EVAP module harness
connector (7) from EVAP pump (8).
Figure 2
10. Remove EVAP pump retaining bolts (9).
Figure 2
11. Remove EVAP pump (8) from EVAP
module box (4). Figures 2 & 3
5
6
8
10
9
4
7
Figure 2: EVAP module box (4), PCV out line
quick connect adapter (5), PCV in line quick
connect adapter (6), EVAP module harness (10),
EVAP pump harness connector (7), EVAP pump
(8), EVAP pump bolts (5).
DSM.0054 Ver. 1.0 05/27/2022
488LPI Propane Autogas
Fuel Storage and EVAP System
Page 31 of 35
INSTALLATION PROCEDURE
8
1. Install new EVAP pump (8) into EVAP
module box (4). Figure 3
2. Install EVAP pump retaining bolts (9).
Refer to Fuel System Torque and
Tightening Specifications. Figure 1
3. Apply dielectric grease to EVAP module
harness connector (7) and connect to
EVAP pump (8). Figure 2
4. Connect EVAP pump (8) to PCV in line
quick connect adaptor (5). Figure 4
5. Connect EVAP pump (8) to PCV out
purge line quick connect adaptor (6).
Figure 4
Pull gently but firmly upward on
PCV and EVAP purge lines to
ensure connectors are seated.
6. Install EVAP module front cover (3).
Figure 1
4
Figure 3: EVAP module box (4), EVAP pump (8).
5
7. Install EVAP module front cover
retaining bolts (2). Refer to Fuel System
Torque and Tightening Specifications.
Figure 1
8. Apply dielectric grease chassis electrical
harness connector (not shown) and plug
into EVAP module harness connector
(1). Figure 1
Clean and inspect harness plug and
connector for corrosion before
plugging in; replace harness as
necessary.
9. Reinstall negative battery cable or, if
equipped: use battery disconnect switch
on battery box to restore vehicle power.
10. Verify proper operation.
DSM.0054 Ver. 1.0 05/27/2022
6
8
4
Figure 4: EVAP module box (4), PCV out line
quick connect adapter (5), PCV in line quick
connect adapter (6), EVAP pump (8).
488LPI Propane Autogas
Fuel Storage and EVAP System
Page 32 of 35
EVAP System Inspection
DESCRIPTION AND OPERATION
A properly functioning EVAP system is essential for optimum 488LPI™ engine performance with
minimal emissions. Refer to 488LPI™ Operators Manual for EVAP system inspection intervals.
The EVAP system runs from the passenger
side Valve Cover and rear of the Upper Intake
Manifold back to chassis mounted portions of
the EVAP system comprising the following
components:
1.
2.
3.
4.
5.
6.
7.
FRONT
9
EVAP Module*
EVAP Pump*
EVAP Canister
EVAP Purge Line
PCV Lines
Make-up Air Line
EVAP Purge Solenoid
*Located inside EVAP Module Box.
10
7
6
5
8
1
4
2
3
Figure 1:
EVAP system components:
Intake Manifold (9), EVAP Module Box (8),
EVAP Module (1), EVAP Pump (2),
EVAP Canister (3), EVAP Purge Line (4),
PCV Lines (5), Make-up Air Line (6),
EVAP Purge Solenoid (7), PCV Valve (10)
DSM.0054 Ver. 1.0 05/27/2022
488LPI Propane Autogas
Fuel Storage and EVAP System
Page 33 of 35
7
INSPECTION PROCEDURE
1. Secure vehicle on an approved hoist.
2. Remove negative (‒) battery cable or, if
equipped: use battery disconnect switch
on battery box to shut off vehicle power.
3. Open hood.
4. Raise vehicle.
5. Verify PCV Line (5) connections at PCV
Valve (10) and rear Upper Intake
Manifold fitting (11) are securely
fastened. Figure 1
6. Verify EVAP Purge Solenoid Quick
Connect Fitting (16) and Upper Intake
Manifold fitting (14) are securely
fastened. Figure 2
7. EVAP Purge Line quick connect fitting
(15) at EVAP Purge Solenoid (7) is
securely fastened. Figure 2
8. Verify Make-Up Air Line (6) quick
connect fitting at Air Intake Tube (12) is
securely fastened. Figure 3
9. Verify PCV Line quick connect fittings
(19) at top of EVAP Module Box (1) and
top of EVAP Canister (3) are secure.
Figure 4
10. Verify EVAP Purge Line (4) quick
connect fitting (18) at EVAP Canister (3)
is securely fastened. Figure 4
11. Verify Make-Up Air Line (6) quick
connect fitting (17) at EVAP Canister (3)
is securely fastened. Figure 4
12. Remove cover (13) from EVAP Module
Box (8) to gain access to PCV Line
connections at EVAP Pump. Figure 4.
Refer to EVAP Pump Replacement
procedure.
13. Verify PCV Line quick connect fittings
(19) to EVAP Pump (2) are securely
fastened. Figure 5
14. Install cover (13) on EVAP Module Box
(8). Refer to EVAP Pump Replacement
procedure. Figure 4.
DSM.0054 Ver. 1.0 05/27/2022
15
16
14
11
10
Figure 2:
EVAP Purge Solenoid (7), purge solenoid to
EVAP purge line location (15), purge solenoid
fitting to intake location (16), purge line fitting (14)
location on Upper Intake Manifold.
PCV Intake Fitting (11), PCV Valve (10).
NOTE: Air Intake Tube not shown for clarity.
6
12
Figure 3:
Make-up Air Line fitting (6) location on
Air Intake Tube (12).
488LPI Propane Autogas
Fuel Storage and EVAP System
Page 34 of 35
5
6
17
15. Reinstall negative battery cable (‒) or, if
equipped: use battery disconnect switch
on battery box to restore vehicle power.
16. Verify proper operation.
19
18
3
19
FRONT
13
8
Figure 4:
EVAP Module box (8), cover (13), PCV Lines
(5), PCV Line quick connector fittings (19),
EVAP Purge Line fitting (18), EVAP Canister (3),
Make-Up Air Line (6)
FRONT
19
2
8
Figure 5:
EVAP Module box (8), PCV line quick connect
fittings (19), EVAP Pump (2).
DSM.0054 Ver. 1.0 05/27/2022
488LPI Propane Autogas
Fuel Storage and EVAP System
Page 35 of 35
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TSB/Document ID: DSM.0054
Replacement Service Bulletin Number:
MFR Communication Date: 2022-05-27
MFR Internal Campaign ID/Software Version:
Communication Type: Service Bulletin/Repair Instructions
NHTSA Components: EQUIPMENT
MFR Component System:
MFR Component Subsystem:
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