Hummer H1 Service Manual page 1170

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DTC P1216 - Fuel Solenoid Response Time Too Short
Step
1 Important: Before clearing DTC(s) use the scan tool "Capture Info" to
record freeze frame and failure records for reference, as data will be lost
when "Clear Info" function is used.
Was the "On-Board Diagnostic (OBD) System Check" performed?
2
Is DTC P0219 set?
3
Will engine start?
4 1. Engine at operating temperature.
2. Observe Inj. Pump Closure Time on scan tool.
Is the scan tool display less than the specified value?
5 1. Engine running.
2. Again, observe Inj. Pump Closure Time on scan tool.
Does Inj. Pump Closure Time display the specified value?
6 DTC is intermittent. If no additional DTCs are stored, refer to "Diagnostic
Aids". If additional DTCs are stored, refer to those charts(s) first.
Are additional DTCs stored?
7 1. Check the Closure ground circuit for an open.
2. If the Closure circuit is open, repair as necessary.
Was a repair performed?
8 1. Check the Closure signal circuit for an open or short to ground.
2. If the Closure signal circuit is open or shorted to ground, repair as neces-
sary.
Was a repair performed?
9 Check the Closure signal circuit for a poor connection at PCM and replace
terminal if necessary.
Is action complete?
10 Replace injection pump. Notice: If injection pump is faulty, the new injec-
tion pump must be timed. Refer to Checking and Adjusting Injection Timing
in Section 4.
Is the action complete?
11 Replace the faulty PCM. Notice: If the PCM is faulty, the new PCM must
be programmed. Go to PCM replacement and programming procedures.
Is the action complete?
12 1. Using the Scan Tool, select "DTC", "Clear Info".
2. Start engine and idle at normal operating temperature.
3. Select "DTC", "Specific", then enter the DTC number which was set.
4. Operate vehicle within the conditions for setting this DTC as specified in
the supporting text.
Does the Scan Tool indicate that this diagnostic Ran and Passed?
13 Using the Scan Tool, select "Capture Info", "Review Info".
Are any DTCs displayed that have not been diagnosed?
05745159
Action
PCM/Tech 1 Scan Tool 105
Value(s) Yes
— Go to Step 2.
— Go to
applicable
table.
— Go to Step 4.
0.75 ms Go to Step 5.
0.1 ms Go to Step 8. Go to Step 10.
— Go to
applicable
DTC table.
— Go to Step 12. Go to Step 10.
— Go to Step 12. Go to Step 9.
— Go to Step 12. Go to Step 11.
— Go to Step 12.
— Go to Step 12.
— Go to Step 13. Go to Step 2.
— Go to the
applicable
DTC table
No
Go to OBD
System Check.
Go to Step 3.
Go to Step 7.
Go to Step 6.
Go to
Diagnostic Aids
—
—
System OK.