Hummer H1 (2002+). Manual - part 293

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PCM/Tech 1 Scan Tool 105

®

05745159

DTC P1216 - Fuel Solenoid Response Time Too Short

Step

Action

Value(s)

Yes

No

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?

—

Go to Step 2.

Go to OBD 

System Check.

2

Is DTC P0219 set?

—

Go to 

applicable 

table.

Go to Step 3.

3

Will engine start?

—

Go to Step 4.

Go to Step 7.

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?

0.75 ms

Go to Step 5.

Go to Step 6.

5

1. Engine running.
2. Again, observe Inj. Pump Closure Time on scan tool.

Does Inj. Pump Closure Time display the specified value?

0.1 ms

Go to Step 8.

Go to Step 10.

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?

—

Go to 

applicable 

DTC table.

Go to 

Diagnostic Aids

7

1. Check the Closure ground circuit for an open.
2. If the Closure circuit is open, repair as necessary.

Was a repair performed?

—

Go to Step 12. Go to Step 10.

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?

—

Go to Step 12.

Go to Step 9.

9

Check the Closure signal circuit for a poor connection at PCM and replace 
terminal if necessary.
Is action complete?

—

Go to Step 12. Go to Step 11.

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?

—

Go to Step 12.

—

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?

—

Go to Step 12.

—

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?

—

Go to Step 13.

Go to Step 2.

13

Using the Scan Tool, select “Capture Info”, “Review Info”.
Are any DTCs displayed that have not been diagnosed?

—

Go to the 

applicable 

DTC table

System OK.

106

PCM/Tech 1 Scan Tool

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®

DTC P1217 Fuel Solenoid Response Time Too 
Long

Circuit Description

The injection pump delivers fuel to individual cylinders by
opening and closing a solenoid control fuel valve. The PCM
monitors the amount of time it takes for the fuel solenoid valve
to physically close after commanded to close. Closure time out
of range is seen as a fault. This response time is measured in
milliseconds. This is a type D DTC.

Conditions for Setting the DTC

• Battery voltage greater than 10 volts and less than 16 

volts.

• Engine coolant temperature greater than -1°C (34°F).

• Engine speed greater than 506 RPM.

• Requested fuel rate is greater than 0.0 mm.

• Inj. Pump Closure Time less than .75 ms.

Action Taken When the DTC Sets

Possible poor performance.

Conditions for Clearing the MIL/DTC

• A History DTC will clear when forty consecutive 

warm-up cycles that the diagnostic does not fail (coolant 
temperature has risen 5°C (40°F) from start up coolant 
temperature and engine coolant temperature exceeds 
71°C (160°F) that same ignition cycle).

• Use of a scan.

Diagnostic Aids

A weak (mechanical failure) fuel solenoid will result in a DTC
P1217. If DTC P1217 is set with any other DTCs, diagnose
them first. If the vehicle is running close to the DTC setting
closure time, vehicle should be checked during cold start ups
and during hot conditions.

Test Description

Number(s) below refer to the number(s) on the diagnostic ta-
ble.
3. This step will determine if DTC P1217 is a hard failure or an

intermittent.

This step will determine if the solenoid is at fault, or if there is
a problem with the PCM or wiring.

FUSE 3B
20AMP
EXTERIOR
FUSE BOX

DRAIN
FILTER

HOT IN RUN
AND START

WATER IN
FUEL LIGHT
LEFT HAND
STATUS CENTER

C9-D

C3-F4

C1-45

B

A

327 YL

C

C9-J

WATER IN
FUEL
SENSOR

FUEL
HEATER

291 PK

57 BK

G2

57 BK

C

A

9-S12-056

FUSE 4B
5AMP
INTERIOR
FUSE BOX

TO

IGNITION

SWITCH

C3-N7

30 GY

FUSE 3A
20AMP
EXTERIOR
FUSE BOX

HOT IN RUN
AND START

C5-A4

239 PK

ENGINE

SHUTOFF

SOLENOID

FUEL

SOLENOID

701 DB

A

A

A

B

C

D

F

E

A

B

FUEL

SOLENOID

DRIVER

IGN

FUEL

SOLENOID

HIGH

FUEL

SOLENOID

LOW

FUEL
SOLENOID
CONTROL

CLOSURE

SIGNAL

CLOSURE

GROUND

ESO

SOLENOID

CONTROL

FUEL INJECT

CONTROL

CLOSURE

SIGNAL

CLOSURE

GROUND

712 LG

713 RD

491 BK

POWER

CONTROL

MODULE

C28-C15

C28-D3

C28-C3

C27-C13

C29-A1

____________________________________________________

PCM/Tech 1 Scan Tool 107

®

05745159

DTC P1217 - Fuel Solenoid Response Time Too Long

Step

Action

Value(s)

Yes

No

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?

—

Go to Step 2.

Go to OBD 

System Check.

2

Is DTC P0370 set?

—

Refer to 

applicable 

table.

Go to Step 3.

3

1. Engine at operating temperature.
2. Observe Inj. Pump Closure Time on scan tool.

Is the scan tool display greater than or equal to the specified value?

2.4 ms

Go to Step 5.

Go to Step 4.

4

1. All accessories on (includes aftermarket add-ons). 
2. Engine idling. 

3. All post glow plug cycles completed. 

4. With a J–39200 connected to ground, measure voltage at the FUEL SOL

fuse (fuel solenoid driver ignition feed circuit) in the U/H relay center. 

Is voltage between specified value? 

12 - 15v

Go to Step 7. 

Go to Step 6. 

5

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?

—

Go to 

applicable 

DTC table.

Go to 

Diagnostic Aids

6

Repair the fuel solenoid driver ignition feed circuit poor connections or 
aftermarket add-ons. 
Was a repair performed? 

—

Go to Step 8. 

—

7

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?

—

Go to Step 8.

—

8

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?

—

Go to Step 9.

Go to Step 2.

9

Using the Scan Tool, select “Capture Info”, “Review Info”.
Are any DTCs displayed that have not been diagnosed?

—

Go to the 

applicable 

DTC table

System OK.

108

PCM/Tech 1 Scan Tool

___________________________________________________

®

DTC P1218 Injection Pump Calibration 
Circuit

Circuit Description

The PCM uses a calibrated resistor mounted internally in the
injection pump to determine fuel rates. The resistor value is
stored in the PCM memory. If the PCM memory has been dis-
turbed or the PCM has been replaced, the PCM will relearn the
resistor value on the next ignition cycle. This is a type B DTC.

Conditions for Setting the DTC

• PCM currently does not have a valid resistor valve.

• PCM is unable to read a resistor value.

Action Taken When the DTC Sets

The lowest fuel table. Possible poor performance problem.

Conditions for Clearing the MIL/DTC

• The PCM will turn the MIL off after three consecutive 

trips without a fault condition.

• A History DTC will clear when forty consecutive 

warm-up cycles that the diagnostic does not fail (coolant 
temperature has risen 5°C (40°F) from start up coolant 
temperature and engine coolant temperature exceeds 
71°C (160°F) that same ignition cycle).

• Use of a scan.

Diagnostic Aids

Check connection at fuel injector driver. Clear DTC, and cycle
ignition. If DTC clears, treat condition as intermittent.

Test Description

Number(s) below refer to the number(s) on the diagnostic ta-
ble.

3. This step will determine if there is a problem with the con-

nection at the fuel solenoid driver or faulty injection pump.

FUSE 3B
20AMP
EXTERIOR
FUSE BOX

DRAIN
FILTER

HOT IN RUN
AND START

WATER IN
FUEL LIGHT
LEFT HAND
STATUS CENTER

C9-D

C3-F4

C1-45

B

A

327 YL

C

C9-J

WATER IN
FUEL
SENSOR

FUEL
HEATER

291 PK

57 BK

G2

57 BK

C

A

9-S12-056

FUSE 4B
5AMP
INTERIOR
FUSE BOX

TO

IGNITION

SWITCH

C3-N7

30 GY

FUSE 3A
20AMP
EXTERIOR
FUSE BOX

HOT IN RUN
AND START

C5-A4

239 PK

ENGINE

SHUTOFF

SOLENOID

FUEL

SOLENOID

701 DB

A

A

A

B

C

D

F

E

A

B

FUEL

SOLENOID

DRIVER

IGN

FUEL

SOLENOID

HIGH

FUEL

SOLENOID

LOW

FUEL
SOLENOID
CONTROL

CLOSURE

SIGNAL

CLOSURE

GROUND

ESO

SOLENOID

CONTROL

FUEL INJECT

CONTROL

CLOSURE

SIGNAL

CLOSURE

GROUND

712 LG

713 RD

491 BK

POWER

CONTROL

MODULE

C28-C15

C28-D3

C28-C3

C27-C13

C29-A1