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Home >> Isuzu >> 2003 >> Axiom Base, 4WD >> Repair and Diagnosis >> Engine Performance >> System >> Transmission Control System >> General Description >> Backup Mode
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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 Powertrain Control Module (PCM).

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

Backup Mode

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.