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HOMESERVICE MANUALSCHEVROLET2006SUBURBAN C1500, 5.3 ZREPAIR AND DIAGNOSISBRAKESANTILOCK BRAKE SYSTEM WITH TRACTION CONTROL SYSTEM & STABILITY CONTROL SYSTEMDIAGNOSTIC INFORMATION AND PROCEDURESDTC C0287, P1644, OR P1689TEST DESCRIPTION
2006 Chevrolet Suburban C1500, 5.3 Z

Test Description

2006 Chevrolet Suburban C1500, 5.3 ZSECTION Test Description

The numbers below refer to the step numbers on the diagnostic table.

  1. 4:  This step tests for voltage supplied to the PCM from the EBCM.
  2. 5:  This step tests for a shorted resistor in the EBCM or a short to voltage within the circuit, by verifying that a large voltage drop occurs in the circuit when the test lamp is placed in parallel with the DMM. The PCM may be damaged if either of these conditions is present.
DTC C0287, P1644, or P1689

Step Action Values Yes No
Schematic Reference: ABS Schematics 
Connector End View Reference: ABS Connector End Views  and Powertrain Control Module (PCM) Connector End Views for the 4.8L, 5.3L and 6.0L engine
1 Did you perform the Diagnostic System Check - Vehicle? - Go to Step 2  Go to Diagnostic System Check - Vehicle
2
  1. Use a scan tool in order to clear the DTCs.
  2. Turn OFF the ignition for 5 seconds.
  3. Start the engine.
Does the DTC set?		 - Go to Step 3  Go to Diagnostic Aids
3 Is this vehicle equipped with vehicle stability enhancement system (VSES) (JL4)? - Go to DTC C0244 (W/O JL4)  or DTC C0244 (W/JL4)  Go to Step 4 
4 
  1. Turn OFF the ignition.
  2. Disconnect from the powertrain control module (PCM), the harness connector containing the delivered torque signal circuit.
  3. Turn ON the ignition.
  4. Use a DMM in order to measure the voltage between the delivered torque signal circuit and a good ground.
Does the voltage measure greater than the specified value?		 4.75 V Go to Step 5  Go to Step 6 
5 
  1. With the DMM still connected to monitor the delivered torque signal circuit, connect one end of a test lamp to a good ground.
  2. Connect the other end of the test lamp to the positive lead of the DMM.
Does the voltage measure less than the specified value?		 0.15 V Go to Step 7  Go to Step 11 
6 Test the delivered torque signal circuit for an open, or a short to ground. Refer to Circuit Testing and Wiring Repairs .
Did you find and correct the condition?		 - Go to Step 14  Go to Step 9 
7
  1. Turn OFF the ignition.
  2. Reconnect the PCM harness connector.
  3. Start the engine.
  4. Select the Traction Assist Data List on the scan tool.
  5. Observe the Delivered Torque parameter on the scan tool.
Does the scan tool display a duty cycle of the delivered torque signal within the specified range?		 25-95% Go to Step 8  Go to Step 12 
8
  1. Turn OFF the ignition.
  2. Install a J 39700  Universal Breakout Box and a J 39700-325  Adaptor Cable. See Special Tools . Install the equipment between the electronic brake control module (EBCM) and the EBCM harness connector.
  3. Start the engine.
  4. Use a DMM in order to measure the Hz frequency between the delivered torque signal circuit and a ground circuit.
Does the frequency of the delivered torque signal measure within the specified range?		 121-134 Hz Go to Step 10  Go to Step 13 
9
  1. Turn OFF the ignition.
  2. Inspect for poor connections at the harness connector of the EBCM. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs .
Did you find and correct the condition?		 - Go to Step 14  Go to Step 10 
10 Replace the EBCM. Refer to Control Module References for replacement, setup, and programming.
Did you complete the replacement?		 - Go to Step 14  -
11 Test the delivered torque signal circuit for a short to voltage. Refer to Circuit Testing and Wiring Repairs .
Did you find and correct the condition?		 - Go to Step 14  Go to Step 13 
12 Inspect for poor connections at the harness connector of the PCM. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs .
Did you find and correct the condition?		 - Go to Step 14  Go to Step 13 
13 Replace the PCM. Refer to Control Module References for replacement, setup, and programming.
Did you complete the replacement?		 - Go to Step 14  -
14
  1. Use the scan tool in order to clear the DTCs.
  2. Operate the vehicle within the Conditions for Running the DTC, as specified in the supporting text.
Does the DTC reset?		 - Go to Step 3  System OK
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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.