The control modules on this vehicle monitor the battery voltage through the battery positive voltage circuits. This vehicle has multiple modules that will set this DTC. For more information on which modules , Refer to Diagnostic Trouble Code (DTC) List - Vehicle .
This diagnostic procedure supports the following DTC:
DTC B1325 Device Power Circuit
This vehicle has DTCs which include DTC Symptoms. For more information on DTC Symptoms, refer to DTC Symptom Description .
DTC Symptom | DTC Symptom Descriptor |
---|---|
03 | Voltage Below Threshold |
07 | Voltage Above Threshold |
The voltage supplied to the control modules are in the range of 7-26 volts.
• | The control module detects a system voltage below the calibrated value usually 9 volts. |
• | The above condition is present at least 5 seconds. |
• | The control module detects a system voltage above the calibrated value usually 18 volts. |
• | The above condition is present at least 5 seconds. |
• | The control module immediately disables all outputs when a out of range voltage condition has been detected, with the exception of GMLAN and Run/Crank relay that are disabled after a 3 minute delay. |
• | The setting of other DTCs is inhibited. |
• | A current DTC clears when the malfunction is no longer present. |
• | A history DTC clears when the module ignition cycle counter reaches the reset threshold, without a repeat of the malfunction. |
Step | Action | Values | Yes | No | ||||||
---|---|---|---|---|---|---|---|---|---|---|
Schematic Reference: Control Module References | ||||||||||
1 | Did you perform the Diagnostic System Check - Vehicle? | -- | Go to Step 2 | |||||||
2 |
Is the Battery Voltage Signal parameter displayed in the specified range? | 9-18 V | Go to Step 3 | Go to Step 4 | ||||||
3 | Is the DTC set as a current DTC? | -- | Go to Step 7 | Go to Testing for Intermittent Conditions and Poor Connections | ||||||
4 |
Is the measured value in the specified range? | 9-18 V | Go to Step 6 | Go to Step 5 | ||||||
5 | Test the battery positive voltage circuit for the following:
Refer to Circuit Testing and Wiring Repairs . Did you find and correct the condition? | -- | Go to Step 9 | Go to Charging System Test | ||||||
6 | Test the all of ground circuits of the module for an open or high resistance. Refer to Circuit Testing and Wiring Repairs . Did you find and correct the condition? | -- | Go to Step 9 | Go to Step 7 | ||||||
7 | Inspect for poor connections at the harness connector of the affected module. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs . Did you find and correct the condition? | -- | Go to Step 9 | Go to Step 8 | ||||||
8 | Replace the affected module Refer to Control Module References for replacement, setup, and programming. Did you complete the replacement? | -- | Go to Step 9 | -- | ||||||
9 | Operate the system in order to verify the repair. Did you find and correct the condition? | -- | System OK | Go to Step 2 |