Action Taken

WARNING: This page is about a different car, the 1991 Geo Storm, 1991 Geo Metro, 1990 Geo Storm, and 1990 Geo Metro. However, it is still accessible from the selected car via links, so may be relevant.

DERM turns on INFLATABLE RESTRAINT indicator light.

NOTE: Test numbers refer to test numbers on diagnostic chart. For circuit number identification, see WIRING DIAGRAMS .

Checks for an open in circuit No. 347 between resistor module and arming sensor.
Checks for an open in circuit No. 349 between resistor module and steering column connector.

Fig 1: Code 21, Chart 2, Steering Column Resistance Too High

Courtesy of GENERAL MOTORS CORP.