Hummer H1 (2006+). Manual - part 89

 

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Hummer H1 (2006+). Manual - part 89

 

 

OBD-200

On-Board Diagnostics

_____________________________________________

DTC P0611 Fuel Injector Control Module (FICM) Performance

DTC P01293 Injector Circuit Low to High Current Transition Time Bank 1

DTC P01294 Injector Circuit Low to High Current Transition Time Bank 2

DTC P01295 Injector Circuit High to Low Current Transition Time Bank 1

DTC P01296 Injector Circuit High to Low Current Transition Time Bank 2

DTC P01658 Fuel Injector Control Module (FICM) Driver Performance 

DTC P01687 Fuel Injector Control Module (FICM) Driver Stuck On

Circuit Description

This diagnostic applies to internal microprocessor integrity conditions within the fuel injection control module (FICM).

Conditions for Setting the DTC

These codes will set when there is an internal failure in the FICM for less than 1 second.

Action Taken When DTC P1293, P1294, P1295, P1296, P1658, or P1687 Sets 

• The control module illuminates the malfunction indicator lamp (MIL) when the diagnostic runs and fails. 

• The control module records the operating conditions at the time the diagnostic fails. The control module stores this informa-

tion in the Freeze Frame/Failure Records. 

Action Taken When the DTC P0611 Sets 

• The control module illuminates the malfunction indicator lamp (MIL) on the second consecutive ignition cycle that the diag-

nostic runs and fails. 

• The control module records the operating conditions at the time the diagnostic fails. The first time the diagnostic fails, the

control module stores this information in the Failure Records. If the diagnostic reports a failure on the second consecu-
tive ignition cycle, the control module records the operating conditions at the time of the failure. The control module 
writes the operating conditions to the Freeze Frame and updates the Failure Records. 

Conditions for Clearing the MIL/DTC 

• The control module turns OFF the malfunction indicator lamp (MIL) after 3 consecutive ignition cycles that the diagnostic 

runs and does not fail. 

• A current DTC, Last Test Failed, clears when the diagnostic runs and passes. 

• A history DTC clears after 40 consecutive warm-up cycles, if no failures are reported by this or any other emission related 

diagnostic.

• Clear the MIL and the DTC with a scan tool. 

Step

Action

Value(s)

Yes

No

    1

NOTE: 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” per-
formed?

Go to step 2.

Go to OBD Sys-

tem Check.

_____________________________________________

 On-Board Diagnostics  OBD-201

5745804

    2

Replace the faulty fuel injection control module (FICM).

Did you complete the replacement?

Go to Step 3

    3

1.

Clear the DTCs with a scan tool.

2.

Turn OFF the ignition for 30 seconds.

3.

Start the engine.

4.

Operate the vehicle within the Conditions for Running the 
DTC. You may also operate the vehicle within the conditions 
that you observed from the Freeze Frame/Failure Records.

Did the DTC fail this ignition?

Go to Step 1 

Go to Step 4

   4

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

Go to the appli-

cable DTC 

table.

System OK.

Step

Action

Value(s)

Yes

No

OBD-202

On-Board Diagnostics

_____________________________________________

DTC P0612 Fuel Injector Control Module (FICM) Relay Control Circuit

Circuit Description

The engine control module (ECM) monitors the condition of the ignition relay control circuit. If the ECM senses excessive voltage
on this circuit, DTC P0612 will set.

Conditions for Setting the DTC

The feedback voltage does not match the output state for more than 1 second.

Action Taken When the DTC Sets 

• The control module illuminates the malfunction indicator lamp (MIL) on the second consecutive ignition cycle that the diag-

nostic runs and fails. 

• The control module records the operating conditions at the time the diagnostic fails. The first time the diagnostic fails, the

control module stores this information in the Failure Records. If the diagnostic reports a failure on the second consecu-
tive ignition cycle, the control module records the operating conditions at the time of the failure. The control module 
writes the operating conditions to the Freeze Frame and updates the Failure Records. 

Conditions for Clearing the MIL/DTC 

• The control module turns OFF the malfunction indicator lamp (MIL) after 3 consecutive ignition cycles that the diagnostic 

runs and does not fail. 

• A current DTC, Last Test Failed, clears when the diagnostic runs and passes. 

• A history DTC clears after 40 consecutive warm-up cycles, if no failures are reported by this or any other emission related 

diagnostic.

• Clear the MIL and the DTC with a scan tool. 

Diagnostic Aids

If the engine starts, the ignition relay control circuit is shorted to power intermittently. 

Step

Action

Value(s)

Yes

No

    1

NOTE: 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” per-
formed?

Go to step 2.

Go to OBD Sys-

tem Check.

    2

Attempt to start the engine.

Does the engine start?

Go to Diagnos-

tic Aids

Go to Step 3

    3

1.

Turn OFF the ignition.

2.

Remove the relay that supplies ignition voltage to the fuel 
injection control module (FICM) 

3.

Disconnect the engine control module (ECM) C75 contain-
ing the relay control circuit 516 (GY/BK).

4.

Turn ON the ignition.

5.

Probe the relay control circuit 516 (GY/BK) pin 52 with a 
test lamp connected to a good ground.

Does the test lamp illuminate?

Go to Step 5

Go to Step 4

_____________________________________________

 On-Board Diagnostics  OBD-203

5745804

    4

Measure the resistance of the coil circuit of the relay with a
DVOM.

Does the resistance measure within the specified range?

60-80

ohms

Go to Step 7

Go to Step 6

    5

Repair the short to battery or ignition voltage on the relay control
circuit.

Did you complete the repair?

Go to Step 8

    6

Replace the faulty relay.

Did you complete the replacement?

Go to Step 8

    7

Replace the faulty ECM. 

Did you complete the replacement?

Go to Step 8

    8

1.

Clear the DTCs with a scan tool.

2.

Turn OFF the ignition for 30 seconds.

3.

Start the engine.

4.

Operate the vehicle within the Conditions for Running the 
DTC. You may also operate the vehicle within the conditions 
that you observed from the Freeze Frame/Failure Records.

Did the DTC fail this ignition?

Go to Step 2 

Go to Step 9

   9

Observe the Capture Info with a scan tool.

Are there any DTCs that have not been diagnosed?

Go to the appli-

cable DTC 

table.

System OK.

Step

Action

Value(s)

Yes

No

 

 

 

 

 

 

 

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