Corvette V8-6.2L (2008)
Automatic Transmission Inline 16-Way Connector End View in SI) and the valve body assembly. If continuity exists, a short to ground is
present in the TEHCM and it should be replaced. If the Vehicle Build Date is prior to March 31, 2007, also replace the IMS. If there is no
continuity, the problem is outside the transmission.
Important
The bad bit should be consistent with the bad bit identified in Step 2.
3. Connect a 3-amp fused jumper wire between the common pin (Pin A) and pins B, C, D & F in the TEHCM IMS connector (refer to Automatic
Transmission Internal Connector End Views in SI). As each circuit (B, C, D & F) is grounded with ignition ON, engine OFF, the Tech 2(R) should
display low (L) for the IMS bit.
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If any of the A/B/C/P circuits displays high (H) when grounded, the TEHCM is faulty and should be replaced. If the Vehicle Build Date is
prior to March 31, 2007, also replace the IMS.
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If Pin F in the PNP Switch Circuit (Tech 2(R) Engine data) displays "In Gear" when grounded, an open exist in the TEHCM or the wiring
connecting it to the ECM. Disconnect the transmission pass-through connector. Check for continuity between the pass-through P/N Signal Pin
3 (refer to Automatic Transmission Inline 16-Way Connector End View in SI) and TEHCM IMS connection Pin F (refer to Automatic
Transmission Internal Connector End Views in SI). If there is continuity, the problem is outside the transmission. If there is no continuity,
replace the TEHCM. If the Vehicle Build Date is prior to March 31, 2007, also replace the IMS.
Important
The bad bit should be consistent with the bad bit identified in Step 2.
4. If the two tests above indicate correct TEHCM operation and the condition still exists, the IMS is faulty and should be replaced.
Important
There is no calibration update for vehicles equipped with a 6L90 RPO MYD transmission or 2008 model year vehicles. These calibrations
were updated before production began.
5. Update the TCM calibration file to the latest released on TIS2WEB.
Disclaimer
