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Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> External Pages >> Different car >> Section 980 (Supplemental Inflatable Restraint System) >> Diagnostic Information and Procedures >> DTC 064: NA >> Test Description

Test Description

WARNING: This page is about a different car, the 2004 GMC Sierra, 2004 GMC Cab & Chassis Sierra, 2004 Chevrolet Silverado, and 2004 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.

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

  1. 2:  Tests for current PPS DTCs.
  2. 8:  Tests for a short to ground, a high resistance, or an open in the PPS class 2 serial data circuit.
  3. 9:  Tests for a short to voltage in the PPS class 2 serial data circuit.
DTC 064

Step Action Yes No
Schematic Reference: SIR Schematics 
Connector End View Reference: SIR Connector End Views 
1 Did you perform the Diagnostic System Check - SIR? Go to Step 2  Go to Diagnostic System Check - SIR 
2 
  1. Install a scan tool.
  2. Turn ON the ignition, with the engine OFF.
  3. With a scan tool, request the passenger presence system (PPS) to flash DTCs. Refer toPassenger Presence System Flash Code Procedures .
Does the PPS indicate that DTC 064 is current?		 Go to Step 3  Go to Step 13 
3 Does the scan tool indicate that DTC B0098 is current? Go to DTC B0098  Go to Step 4 
4
  1. Turn OFF the ignition.
  2. Disconnect the PPS module connector. Refer to Inflatable Restraint Passenger Presence System Replacement - Front .
  3. Inspect the PPS module terminals and harness connector for damage or corrosion.
Does the PPS module terminals or harness connector exhibit any signs of damage or corrosion?		 Go to Step 5  Go to Step 6 
5
  1. If the PPS module terminals are damaged, replace the PPS. Refer to Inflatable Restraint Passenger Presence System Replacement - Front .
  2. If the PPS harness connector is damaged, replace the connector. Refer to Connector Repairs in Wiring Systems.
Did you complete the replacement?		 Go to Step 13  -
6
  1. Disconnect the main seat harness connector located under the RF seat. Refer to Power Seat Systems Connector End Views in Seats.
  2. Inspect both halves of the connector for corrosion or damage. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems.
Did you find and correct the condition?		 Go to Step 13  Go to Step 7 
7
  1. Disconnect the SDM connector. Refer toInflatable Restraint Sensing and Diagnostic Module Replacement .
  2. Inspect the SDM connector for corrosion or damage. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems.
Did you find and correct the condition?		 Go to Step 13  Go to Step 8 
8  Test the PPS class 2 serial data circuit for a short to ground, a high resistance, or an open. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.
Did you find and correct the condition?		 Go to Step 13  Go to Step 9 
9 
  1. Turn ON the ignition, with the engine OFF.
  2. Test the PPS class 2 serial data circuit for a short to voltage. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.
Did you find and correct the condition?		 Go to Step 13  Go to Step 10 
10
IMPORTANT: The PPS is a calibrated system. The PPS must be rezeroed after replacement.
Replace the PPS. Refer to Inflatable Restraint Passenger Presence System Replacement - Front .Did you complete the replacement?		 Go to Step 11  -
11
  1. Reconnect all SIR and PPS system components.
  2. Verify that all components, connectors, and CPAs are properly mounted.
  3. Use the scan tool in order to clear the SIR and PPS DTCs.
  4. Rezero the PPS. Refer to Passenger Presence System Rezeroing Procedure .
  5. Operate the vehicle within the Conditions for Running the DTC as specified in the supporting text.
Does the DTC reset?		 Go to Step 12  System OK
12 Replace the SDM. Refer toInflatable Restraint Sensing and Diagnostic Module Replacement .
Did you complete the replacement?		 Go to Step 13  -
13
  1. Reconnect all SIR and PPS system components.
  2. Verify that all components, connectors and CPAs are properly mounted.
  3. Use the scan tool in order to clear the SIR and PPS DTCs.
  4. Rezero the PPS. Refer to Passenger Presence System Rezeroing Procedure .
  5. 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
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