B210A-84-SYSTEM VOLTAGE LOW - SIGNAL BELOW ALLOWABLE RANGE

For a complete wiring diagram, refer to the Wiring Information.

When Monitored:
Continuously with the ignition on.
Set Condition:
The Intrusion Transceiver Module (ITM) receives a low charging system voltage message over the CAN Bus or detects voltage under 9.5 volts on the (A412) Fused B(+) circuit.

Possible Causes
CHARGING SYSTEM VOLTAGE LOW
(A412) FUSED B(+) CIRCUIT OPEN OR SHORT TO GROUND
INTRUSION TRANSCEIVER MODULE (ITM)

1. CHECK PCM FOR CHARGING SYSTEM DTC

1.	With the scan tool, read the PCM DTCs.

Are there any Charging System DTCs set in the PCM?

Yes

2. CHECK FOR AN ACTIVE DTC

1.	With the scan tool, read the active ITM DTCs.

Does the scan tool display this DTC as active?

Yes

Test complete, the condition or conditions that originally set this DTC are not present at this time. Using the wiring diagrams as a guide, check all related splices and connectors for signs of water intrusion, corrosion, pushed out or bent terminals, and correct pin tension.
Perform the BODY VERIFICATION TEST. (Refer to 28 - DTC-Based Diagnostics/MODULE, Totally Integrated Power (TIPM) - Standard Procedure).

3. CHECK THE VOLTAGE AT THE (A412) FUSED B(+) CIRCUIT

1.	Disconnect the ITM harness connector.

2.	Turn the ignition on.

3.	Measure the voltage between the (A412) Fused B(+) circuit and ground. Compare this value to the voltage measured at the vehicle battery.

Is the voltage measured at the ITM harness connector the same as measured at the battery?

Yes

Repair the (A412) Fused B(+) circuit for an open or short to ground.
Perform the BODY VERIFICATION TEST. (Refer to 28 - DTC-Based Diagnostics/MODULE, Totally Integrated Power (TIPM) - Standard Procedure).