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Section 04 ENGINE MANAGEMENT (1503 4-TEC)
Subsection 03 (COMPONENT INSPECTION, REPLACEMENT AND ADJUSTMENT)
Pressure stays below
40 kPa (5.8 PSI) for 10 min.
(TOPS valve is open)
TOPS DIAGNOSTIC FLOW CHART
Connect safety
lanyard
TOPS valve opens
(short knocking noise)
Check
TOPS switch
Check output voltage
on wiring harness
Replace
TOPS valve
Lower than 8 V
Greater than 8 V
No
OK
Fails
Repair or
replace
Install engine leak test pump
gauge on oil dipstick tube
Start engine
Yes
No
TOPS OK
Yes
Check
TOPS valve
Fails
OK
Fails
OK
Fails
Replace
TOPS valve
Retest
Retest
OK
Try a new MPEM
Check
wiring harness
Retest
Working?
No
Yes
Try a new
ECM
smr2005-013-006_aen
132
smr2005-013
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