original PCM See: Powertrain Management/Computers and Control Systems/Engine Control Module/Service and Repair.?
VSA System
VSA DTC Troubleshooting: 83
DTC 83:
PGM-FI Malfunction
NOTE: Before you troubleshoot, record all freeze data and any on-board snapshot, and review the general troubleshooting information.
1. Turn the ignition switch to ON (II).
2. Check for DTCs with the HDS.
Is DTC 86 indicated with DTC 83 at the same time?
YES -
Do the DTC 86 troubleshooting See: 86.
NO -
Go to step 3.
3. Check for fuel and emissions systems DTCs with the HDS See: Powertrain Management/Computers and Control Systems/Testing and
Inspection/Initial Inspection and Diagnostic Overview.
Are any DTCs indicated?
YES -
Do the applicable troubleshooting for the PCM.?
NO -
Go to step 4.
4. Clear the DTC with the HDS.
5. Turn the ignition switch to LOCK (0), then start the engine.
6. Check for DTCs with the HDS.
Is DTC 83 indicated?
YES -
Go to step 7.
NO -
Intermittent failure, the system is OK at this time. Check for loose terminals between the PCM connector A (49P), and the VSA modulator-control
unit 46P connector. Check for a loose connection at G303. Refer to intermittent failures troubleshooting.?
7. Update the VSA modulator-control unit if it does not have the latest software See: Brakes and Traction Control/Antilock Brakes / Traction
Control Systems/Traction Control Module/Testing and Inspection. If the unit already has the latest software, substitute a known-good VSA
modulator-control unit See: Brakes and Traction Control/Antilock Brakes / Traction Control Systems/Traction Control Module/Service and
Repair.
8. Turn the ignition switch to LOCK (0), then start the engine.
9. Check for DTCs with the HDS.
Is DTC 83 indicated?
YES -
Check for loose terminals in the VSA modulator-control unit 46P connector. Check for a loose connection at G303. If the VSA modulator-control
unit was updated, substitute a known-good VSA modulator-control unit See: Brakes and Traction Control/Antilock Brakes / Traction Control
Systems/Traction Control Module/Service and Repair, then retest. If the VSA modulator-control unit was substituted, go to step 1.
