Circuit Description
The battery current sensor pulse width modulation (PWM) input signal is monitored by the body control module (BCM) which sends a serial data message to the instrument panel cluster (IPC) when the PWM input signal is out of the normal operating range.
DTC Descriptor
This diagnostic procedure supports the following DTC:
DTC B1516 Battery Current Sensor Performance
DTC Symptom | DTC Symptom Descriptor |
|---|---|
08 | Signal Invalid |
Conditions for Running the DTC
| • | The key is in the ON position. |
| • | The engine is running. |
Conditions for Setting the DTC
B1516 08
Sets as current when the duty cycle of the PWM input signal is less than 4 percent or more than 96 percent for more than 33 seconds.
Action Taken When the DTC Sets
The CHARGING SYSTEM FAILURE warning message will be set in the IPC.
Conditions for Clearing the MIL/DTC
The DTC clears as a current status when the battery sensed current returns to normal range for more than 15 seconds.
Step | Action | Values | Yes | No | ||||||
|---|---|---|---|---|---|---|---|---|---|---|
Schematic Reference: Starting and Charging Schematics Connector End View Reference: Engine Electrical Connector End Views | ||||||||||
1 | Did you perform the Diagnostic System Check - Vehicle? | -- | Go to Step 2 | |||||||
2 |
Does the voltage read less than specified? | 5 V | Go to Step 5 | Go to Step 3 | ||||||
3 | Using a DMM, measure the voltage between the current sensor signal circuit on the wiring harness and ground. Does the voltage read less than specified? | 5 V | Go to Step 6 | Go to Step 4 | ||||||
4 | Using a DMM, measure the voltage between the current sensor supply voltage circuit and the current sensor low reference circuit on the wiring harness. Does the voltage read less than specified. | 5 V | Go to Step 7 | Go to Step 8 | ||||||
5 | Test the current sensor supply voltage circuit for the following:
Refer to Circuit Testing and Wiring Repairs . Did you find and correct the condition? | -- | Go to Step 11 | Go to Step 9 | ||||||
6 | Test the current sensor signal circuit for the following:
Refer to Circuit Testing and Wiring Repairs . Did you find and correct the condition? | -- | Go to Step 11 | Go to Step 9 | ||||||
7 | Test the current sensor low reference circuit for high resistance or an open. Refer to Circuit Testing and Wiring Repairs . Did you find and correct the condition? | -- | Go to Step 11 | Go to Step 9 | ||||||
8 | Inspect for poor connections at the harness connector of the battery current sensor. Refer to Connector Repairs . Did you find and correct the condition? | -- | Go to Step 12 | Go to Step 10 | ||||||
9 | Inspect for poor connections at the harness connector of the body control module (BCM). Refer to Connector Repairs . Did you find and correct the condition? | -- | Go to Step 12 | Go to Step 11 | ||||||
10 | Replace the battery current sensor. Refer to Battery Current Sensor Replacement . Did you complete the replacement? | -- | Go to Step 12 | -- | ||||||
11 | Replace the BCM. Refer to Control Module References for replacement, setup, and programming. Did you complete the replacement? | -- | Go to Step 12 | -- | ||||||
12 | Operate the vehicle and verify the repair. Did you correct the condition? | -- | System OK | Go to Step 2 | ||||||
