B2109
B2109-IGNITION SWITCH SENSE INPUT CIRCUIT HIGH- When Monitored:
Continuously.
- Set Condition:
The Steering Column Module (SCM) detects that the Ignition Switch Sense circuit is open for more than 5 seconds.
Possible Causes
INTERMITTENT IGNITION SWITCH SENSE INPUT CIRCUIT HIGH DTC
(G20) IGNITION SWITCH SENSE CIRCUIT OPEN OR HIGH RESISTANCE
(Z907) GROUND CIRCUIT OPEN OR HIGH RESISTANCE
STEERING COLUMN MODULE (SCM)
Diagnostic Test
1. DTC STATUS IS ACTIVE
Turn the ignition on.
With the scan tool, select View DTCs in the Steering Column Module.
Is the DTC status Active at this time?
Yes >>Go to 2
No >>Go to 5
2. (G20) IGNITION SWITCH SENSE CIRCUIT OPEN OR HIGH RESISTANCE
Turn the ignition off.
Disconnect the Steering Column Module harness connector.
Turn the ignition on.
Using a 12-volt test light connected to ground, check the (G20) Ignition Switch Sense circuit in the Steering Column Module harness connector.
NOTE: The test light must illuminate brightly. Compare the brightness to that of a direct connection to the battery.
Does the test light illuminate brightly?
Yes >>Repair the (G20) Ignition Switch Sense circuit for an open circuit or high resistance.
No >> Go to 3
3. (Z907) GROUND CIRCUIT OPEN OR HIGH RESISTANCE
Turn the ignition off.
Using a 12-volt test light connected to 12-volts, check the (Z907) Ground circuit in the Steering Column Module harness connector.
NOTE: The test light must illuminate brightly. Compare the brightness to that of a direct connection to the battery.
Does the test light illuminate brightly?
Yes >>Go To 4
No >>Repair the (Z907) Ground circuit for an open circuit or high resistance.
4. STEERING COLUMN MODULE (SCM)
View repair.
Repair
Replace the Steering Column Module (SCM).
5. INTERMITTENT IGNITION SWITCH SENSE INPUT CIRCUIT HIGH DTC
The conditions necessary to set this DTC are not present at this time.
Using the wiring diagram/schematic as a guide, inspect the wiring and connectors.
While monitoring the scan tool data relative to this circuit, wiggle test the wiring and connectors.
Look for the data to change or for the DTC to reset during the wiggle test.
Were any problems found?
Yes >>Repair as necessary
No >>Test complete.