FUEL TRANSFER PUMP FAILS TO OPERATE -- CONTINUED
Clear restrictions. If restrictions cannot
be cleared, replace hose/connection
(WP 0202 00). Verify fault is corrected.
CONTINUED FROM STEP I
Are hoses and connections free of restrictions?
1. Remove subfloor plate 22 (WP 0454 00).
2. Check pump return hose and connection at
filter manifold and hoses and connections at
pump for restrictions (kinks/blockage).
CONTINUED ON NEXT PAGE
Is vehicle equipped with Enhanced Diagnostic
1. Install a 0--300 psi dial pressure gauge with 1/2--inch
tee between port R1 and hose at filter manifold.
2. Perform step I and record pressures at test port R1
and at impact wrench return port.
Are pressures at both ports approximately the same?
Replace hydraulic filters
(WP 0554 00). Verify
fault is corrected.
Clear obstructions. If obstructions
cannot be cleared, replace check
valve (WP 0551 00). Verify fault
STEP H AND O
Are passages and check valve free of obstructions?
Check filter manifold oil passages and check valve
at port R1 for obstructions.
Go to Step O.