GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Pontiac 🢒 2009 🢒 Vibe - FWD 🢒 Safety and Security 🢒 Supplemental Inflatable Restraints 🢒 DTC B1242

Circuit Description

The door control receiver receives signals from the transmitter and sends these signals to the body control module (BCM).

DTC Descriptor

This diagnostic procedure supports the following DTC:

DTC C1242 Wireless Door Lock Tuner Circuit Malfunction

Conditions for Running the DTC

This DTC shall run when the ignition is On.

Conditions for Setting the DTC

An applicable RDA signal cannot be received within 1 second after an PRG signal has been output from the BCM.

When one of the following conditions is met:

Action Taken When the DTC Sets

Door lock does not 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: Door Lock/Indicator 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 OFF ignition.
  2. Disconnect the body control module (BCM) connector E61 and the door control receiver connector M12.
  3. Measure the as follows:
    4. • Between connector E61 terminal 16 to connector M12 terminal 2
    • Between connector E61 terminal 16 and body ground
    • Between connector E61 terminal 17 and connector M12 terminal 3
    • Between connector E61 terminal 17 and body ground

Is the resistance measured within the specified values?

E61 terminal 16 to M12 terminal 2 = Below 1 Ohm

E61 terminal 16 to body ground = 10 K ohms or higher

E61 terminal 17 to M12 terminal 3 = Below 1 Ohm

E61 terminal 17 to body ground = 10 K ohms or higher

Go to Step 3

Go to Step 5

3

Measure the resistance and voltage at the door control receiver connector M12 as follows:

    • Resistance between terminal 1 and body ground
    • Voltage between terminal 5 and body ground

Is the resistance and voltage measured with the specified values?

Resistance = Below 1 Ohm

Voltage = 11 - 14 Volts

Go to Step 4

Go to Step 6

4
  1. Reconnect the BCM connector E61.
  2. Replace the door control receiver with a known good one.
  3. Perform the registration procedure.

Does the wireless door lock function normally?

 

Go to Step 7

Go to Step 8

5

Repair or replace harness or connector between the BCM and door control receiver.

Did you complete the repair or replacement?

--

Go to Step 9

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6

Repair or replace harness or connector of door control receiver.

Did you complete the repair or replacement?

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Go to Step 9

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7

Replace door control receiver.

Did you complete the replacement?

--

Go to Step 9

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8

Replace the BCM. Refer to Control Module References for BCM replacement, setup, and programming.

Did you complete the replacement?

--

Go to Step 9

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9
  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?

--

Go to Step 2

System OK