B2101-IGNITION RUN/START INPUT LOW

For a complete wiring diagram Refer to Section 8W.

When Monitored:
With the ignition switch on.
Set Condition:
The WCM/WIN (SKREEM) Module has detected the ignition switch input voltage below a calibrated value.

(F20) IGNITION SWITCH OUTPUT (RUN-START) CIRCUIT OPEN

Diagnostic Test

NOTE: Check to make sure the battery and charging system are operating properly. Battery and charging system problems may cause these DTC's to set.

NOTE: Diagnose any related Powertrain DTC(s) before continuing.

Turn the ignition on.
With a scan tool, read, record and erase TIPM DTCs.
Perform 5 ignition cycles, leaving the ignition switch on for a minimum of 90 seconds per cycle.
Using the scan tool, read TIPM DTCs.

Does the scan tool display this DTC as active?

Yes

Go To 2

The condition that caused this code to set is not present at this time. Check for an intermittent condition by inspecting the related wiring harness for chafed, pierced, pinched, and partially broken wires. Also inspect the related connectors for broken, bent, pushed out, spread, corroded, or contaminated terminals.
Perform BODY VERIFICATION TEST - VER 1. (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - STANDARD PROCEDURE)

2. (F20) IGNITION SWITCH OUTPUT (RUN-START) CIRCUIT OPEN

NOTE: Check the related fuse(s) to the (F20) Ignition Switch Output (Run-Start) circuit. If a fuse is found to be open, repair the circuit for a shorted condition.

Turn the ignition off.
Disconnect the WCM/WIN (SKREEM) harness connector.
Turn the ignition on.
Using a 12-volt test light connected to ground, probe the (F20) Ignition Switch Output (Run-Start) circuit in the WCM/WIN (SKREEM) harness connector.

Does the test light illuminate brightly?

Yes

Go to 3

Repair the (F20) Ignition Switch Output (Run-Start) circuit for an open.
Perform BODY VERIFICATION TEST - VER 1. (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - STANDARD PROCEDURE)

3. (Z905) GROUND CIRCUIT OPEN

NOTE: A dirty (partial) ground can cause abnormal conditions within a system. This step ensures the module has a good ground.

Turn the ignition off.
Using a 12-volt test light connected to 12-volts, probe the (Z905) Ground circuit in the WCM/WIN (SKREEM) harness connector.

Does the test light illuminate brightly?

Yes

Replace and program the SKREEM in accordance with the Service Information.

Perform BODY VERIFICATION TEST - VER 1. (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - STANDARD PROCEDURE)

Repair the (Z905) Ground circuit for an open.
Perform BODY VERIFICATION TEST - VER 1. (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - STANDARD PROCEDURE)