A symptom based TSB is required before using this procedure.
IMPORTANT: Before starting, make sure:
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ASIST on the C-III computer has been freshly synchronized (updated).
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All C-III software updates (if any) have been installed.
NOTE:
The C-III computer automatically gets applicable ECM reprogramming data during ASIST synchronization.
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C-III PCMCIA Card Adapter is installed.
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C-III Security Card is installed.
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A screen print for Warranty documentation can be done from C-III during this process while still cable-connected to the vehicle.
1. Use the USB cable to connect the Vehicle Interface (VI) to the C-III computer and then connect the VI to the vehicle.
CAUTION
2. Connect the AC Adapter to the C-III computer.
CAUTION
3. Connect a battery charger to the vehicle battery:
For Conventional Vehicles
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Set the battery charger at a low charge rate.
NOTE:
The GR-8 (Battery and Electrical Diagnostic Station) set to "Power Supply" mode is recommended.
CAUTION
For Hybrid Vehicles
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Use the GR-8 Battery and Electrical Diagnostic Station.
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If needed, refer to Hybrid Service TSBs for connecting the GR-8 to the Hybrid 12V battery.
CAUTION
4. Turn the ignition ON with the engine OFF.
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The engine must be OFF (not running) during the reprogramming procedure.
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For Hybrid vehicles, Make sure the dash warning lights are ON and the "READY" light is OFF.
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Turn OFF all vehicle electrical loads such as exterior lights, interior lights, HVAC, blower, rear defogger, audio, NAVI, seat heater, steering wheel heater, etc.
CAUTION
5. Make sure the engine cooling fan(s) are not running.
If the cooling fans are running:
a. Turn the ignition OFF.
b. Wait for the engine to cool.
c. Turn the ignition ON (with engine OFF).
d. Make sure the engine cooling fans are not running.
6. Open / start ASIST on the C-III computer.
7. Select CONSULT Utilities, CONSULT-III, and Wait for the "Detecting VI/MI in progress" message to clear.
8. Select the detected VI from the list. (See Figure 1.)
9. Select Connect. (See Figure 1.)
10. Wait for the "Checking the firmware version" message to clear.
11. Select ECM reprogramming / Programming (see Figure 2).
12. Select Select.
13. Select Confirm
14. Select Diagnosis
15. Wait for ECM Diagnosis to complete.
16. If there are no DTCs, select the "Repair" icon (see Figure 5).
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If there are any DTCs other than those listed in the accompanying Symptom based TSB, diagnose, perform repairs, and erase DTCs before continuing.
17. Select the "ECM Reprogram" icon. (See Figure 6.)
18. At this point, refer to the symptom based TSB that directed you to reprogram the ECM.
The symptom based TSB is required, in order to determine which reprogramming part number to use.
19. Select Next
NOTE:
If the screen in Figure 8 appears, there is data stored in the VI. Select "Yes" to proceed with Reprogramming.
20. The screen in Figure 9 is displayed during data transfer.
CAUTION: During data transfer:
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DO NOT disturb the VI, DDL, or USB connections.
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DO NOT try to start the engine or turn the ignition OFF.
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The engine fans may turn on. This is normal.
NOTE:
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If "Transfer To VI" reaches 100%, and "Transfer To ECU" does not start, or
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The Error in Figure 9A displays.
a. DO NOT replace the ECM. The ECM is not damaged.
b. Check / make sure the battery voltage is above 12 V and all vehicle electrical loads are turned OFF (see step 3 and 4).
c. Select Cancel Data Transmission, then click on the "Home" icon (upper left corner of C-III screen) and re-start from the beginning (step 1).
