Ascender 2WD L6-4.2L (2003)
Step 13 - 14
Test Description
The numbers below refer to the step numbers on the diagnostic table.
6. This step tests for battery voltage on the signal circuits that are not required.
7. This step tests for no battery voltage on the required signal circuits.
8. If any ignition switch parameters that should be inactive in the present ignition switch position are active, 2 ignition switch signal circuits may be
shorted together.
9. This step eliminates open circuits as the cause of the malfunction.
Scan Tool Data Definitions
Scan Tool Data Definitions
Battery Voltage: The scan tool displays 0.0-16.0 volts. The battery voltage input represents the system voltage measured at the BCM ignition feed
input.
Ignition Accessory: Input from ignition switch Accessory circuit. Used to determine power mode. Hot in ACC and ON.
Ignition 0: Input to the control module from the ignition switch indicating the Ignition 0 position. Switch closed (HOT) in ignition switch positions
UNLOCK, ACC, ON, and START
Ignition 1: Input to the control module from the ignition switch indicating the Ignition 1 position. Switch closed (HOT) in ignition switch positions ON
and START
Ignition 3: Input to the control module from the ignition switch indicating the Ignition 3 position. Switch closed (HOT) in ignition switch position ON.
Key in Ignition: Input from ignition switch indicating that the ignition key is inserted into the ignition switch. HOT with key in ignition switch.
Module Part Number: Indicates the module part number.
Seed and Key Timer: Indicates the time remaining for programming functions.
Software Part Number: Part number of component program or the ECU. Used to determine applicability to vehicle RPO content.
Scan Tool Output Controls