GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Pontiac 🢒 2009 🢒 Vibe - FWD 🢒 DTC 🢒 DTC C1241

Circuit Description

If a malfunction in the power source circuit occurs, or a malfunction in communication with the skid control module, or in a speed sensor occurs, the 4WD control module will prohibit operations by the fail safe function.

DTC Descriptor

This diagnostic procedure supports the following DTC:

DTC C1241 Low Power Supply Voltage

Conditions for Running the DTC

This DTC shall run when the ignition is On.

Conditions for Setting the DTC

When one of the following conditions is met:

    • For 10 seconds or more, at a vehicle speed of 3 km/h (2 mph) or more, voltage of the 4WD control module terminal 11 is 9.5 volts or less.
    • When both of the following continue for 60 seconds or more:
       - With the voltage of the 4WD control module terminal 11 is 9.5 volts or less and communication with the skid control module cannot be performed.
       - A malfunction in communication with the skid control module.
    • For 3 seconds or more, with the voltage of the 4WD control module terminal 11 is 9.5 volts or more, communication with the skid control module cannot be performed.

Action Taken When the DTC Sets

The 4WD control module will prohibit operations by the fail safe function.

Conditions for Clearing the DTC

The DTC will clear when conditions for setting the DTC have been repaired.

Step

Action

Value(s)

Yes

No

Schematic Reference: Transfer Case Control Schematics

Connector End View Reference: Component Connector End Views

1

Did you perform the Diagnostic System Check - Vehicle?

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Go to Step 2

Go to Diagnostic System Check - Vehicle

2
  1. Turn the ignition Off.
  2. Install a scan tool.
  3. Turn the ignition On, with the engine Off.
  4. Using scan tool, clear any DTCs.
  5. Start the engine.
  6. Drive the vehicle, accelerate to a speed of 2 km/h (1 mph) or more and check that no brake control system DTC or communication DTC is set.

Is any DTC set?

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Go to Diagnostic Trouble Code (DTC) List - Vehicle

Go to Step 3

3

  1. Turn OFF ignition.
  2. Remove fuse IG1.
  3. Measure the resistance of the fuse.

Is the resistance measured within the specified value?

Below 1 Ohms

Go to Step 4

Go to Step 8

4
  1. Disconnect the 4WD control module connector.
  2. Turn ignition On, with engine Off.
  3. Measure the voltage between the 4WD control module connector IG1 terminal 11 and body ground.

Is the voltage measured within the specified values?

10-14 Volts

Go to Step 5

Go to Step 7

5

Measure the voltage between the 4WD control module connector IG1 terminal 23 and body ground.

Is the resistance measured within the specified values?

Below 1 Ohm

Go to Step 6

Go to Step 7

6
  1. Using scan tool, clear any DTCs.
  2. Start the engine.
  3. Drive the vehicle, accelerate to a speed of 2 km/h (1 mph) or more and check that no brake control system DTC or communication DTC is set.

Is any DTC set?

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Go to Step 9

Go to Step 10

7

Repair or replace harness or 4WD control module connector.

Did you complete the repair or replacement?

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Go to Step 10

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8

Replace fuse IG1.

Did you complete the replacement?

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Go to Step 10

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9

Replace 4WD control module.

Did you complete the replacement?

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Go to Step 10

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10
  1. Use the scan tool in order to clear the DTC.
  2. Operate the vehicle within the Conditions for Running the DTC, as specified in the supporting text.

Does the DTC reset?

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Go to Step 2

System OK