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Home >> Isuzu >> 1990 >> Trooper II V6-2827cc 2.8L >> Repair and Diagnosis >> Powertrain Management >> Transmission Control Systems >> Description and Operation >> Backup Mode

Backup Mode

If a major system failure occurs which could affect safety or damage the transmission under normal vehicle operation, the diagnostic system detects the fault and overrides the TCM.

The "CHECK TRANS" light flashes to alert the driver, and the transmission must be manually shifted as follows:


Select lever position Gear Ratio Selected

D 4 (Fourth)

Manual 3 4 (Fourth)

Manual 2 3 (Third)

Manual L 1 (First)

R Reverse


Shifts are firmer to prevent clutch slip and consequent wear. The fault should be corrected as soon as possible.