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HOMESERVICE MANUALSPONTIAC2007WAVE LT, 4D HATCHBACK, STANDARD, Y4M/MLMREPAIR AND DIAGNOSISBRAKESTRACTION CONTROLANTI-LOCK BRAKE SYSTEMDIAGNOSTIC INFORMATION AND PROCEDURESNO COMMUNICATION WITH ELECTRONIC BRAKE CONTROL MODULEDIAGNOSTIC AIDS
2007 Pontiac Wave LT, 4D Hatchback, Standard, Y4M/MLM

Diagnostic Aids

2007 Pontiac Wave LT, 4D Hatchback, Standard, Y4M/MLMSECTION Diagnostic Aids

Typical causes of no communication with the EBCM:

  • Poor terminal contact at the EBCM
  • Loss of EBCM ground to terminal 8 and 24
  • Loss of battery voltage at EBCM terminals 9 and/or 25
  • Loss of ignition voltage at EBCM 4
  • Open/grounded data line
  • Data line with high resistance
No Communication with Electronic Brake Control Module

Step Action Value(s) Yes No
1 Did you perform the Diagnostic System Check - Vehicle? - Go to Step 2  Go to Diagnostic System Check - Vehicle
2
  1. Turn the ignition switch OFF.
  2. Disconnect the electronic brake control module (EBCM) harness.
  3. Connect a voltmeter to the EBCM harness terminal 9 and then to body ground.
Does the voltage measure within the specified range?		 B+ Go to Step 4  Go to Step 3 
3
  1. Repair the source of the low voltage to terminal 9.
  2. Inspect for an open fuse, poor terminal contact, or a grounded wire.
Did you find and correct the condition?		 - System OK -
4 Connect a voltmeter to the EBCM harness terminal 25 and then to the body ground.
Does the voltage measure within the specified range?		 B+ Go to Step 6  Go to Step 5 
5
  1. Repair the source of the low voltage to terminal 25.
  2. Inspect for an open fuse, poor terminal contact, or a grounded wire.
Did you find and correct the condition?		 - System OK -
6
  1. Turn ON the ignition switch.
  2. Connect a voltmeter to the EBCM harness terminal 4 and then to body ground.
Does the voltage measure within the specified range?		 B+ Go to Step 8  Go to Step 7 
7
  1. Repair the source of the low voltage to terminal 4.
  2. Inspect for an open fuse, poor terminal contact, or a grounded wire.
Did you find and correct the condition?		 - System OK -
8
  1. Turn the ignition switch OFF.
  2. Connect an ohmmeter to the EBCM harness terminal 8 and 24 and then to body ground.
Does the resistance measure less than the specified value?		 2 Ω Go to Step 10  Go to Step 9 
9
  1. Repair the source of the high resistance between terminal 8 and 24.
  2. Find and inspect the ground location where the circuit is secured to body ground.
Did you find and correct the condition?		 - System OK -
10
  1. Turn OFF the ignition switch.
  2. Verify the EBCM harness is still disconnected from the EBCM.
  3. Connect an ohmmeter to the EBCM harness terminal 7 and the data link connector (DLC) terminal 7.
Does the resistance measure less than the specified value?		 2 Ω Go to Step 12  Go to Step 11 
11 Repair the source the high resistance between terminal 7 and DLC terminal 7.
Did you complete the repair?		 - System OK -
12
  1. Turn the ignition switch OFF.
  2. Verify the EBCM harness is still disconnected.
  3. Connect an ohmmeter to the EBCM harness terminal 7 and then to body ground.
Does the resistance measure OL, open circuit?		 - Go to Step 14  Go to Step 13 
13 Find and repair the short to ground on the data line.
Did you find and correct the condition?		 - System OK -
14 Replace the EBCM.
Did you complete the replacement?		 - System OK -
RENDER: 1.0x

NO RELATED

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.