Chart E Warning Lamp Does Not Come "ON" Steady During Crank

CIRCUIT DESCRIPTION
When the ignition switch is first turned "ON" system voltage is applied from Fuse 17 to "SIR Indicator High," terminal "B9," and to the "INFL REST" warning lamp which is connected to "SIR Indicator Low," terminal "A1." Fuse 12 applies system voltage to the "Ignition 1" inputs, terminals "A3" and "B3." The DERM responds by flashing the "INFL REST" warning lamp 7 to 9 times.

When the engine is being cranked, system voltage is applied from Fuse 20 to the DERM at the "Crank" input. The DERM responds by grounding the "S1R Indicator Low" output until system voltage is removed from the "Crank" input. This results in the "INFL REST" warning lamp being "ON" during cranking.

After cranking the DERM will again flash the "INFL REST" warning lamp 7 to 9 times.

TEST DESCRIPTION
Number(s) below refer to circled number(s) on the diagnostic chart.
1. This test checks whether the malfunction is due to an open Fuse 20.
2. This test checks for a proper signal to the "Crank" input during cranking.
3. This test determines whether the lack of a proper crank signal is due to an open "Crank" input circuit or an open power feed to Fuse 20.
4. This test checks whether Fuse 20 is open due to a short to ground in the "Crank" input circuit.
5. This test determines whether the short to ground is in the wiring harness or in the DERM.