B1676

Anti-Lock Control

Pinpoint Test A: DTC B1676


Normal Operation

The voltage required for correct ABS operation is between 10 and 17 volts. Voltage outside of this range causes the ABS module to set DTC B1676.

- DTC B1676 (Battery Pack Voltage Out of Range)- this DTC sets in every ignition cycle if, with the ignition in the RUN position and vehicle speed greater than 6 km/h (4 mph), the battery voltage is less than 10 volts or more than 17 volts. DTCs set in the ignition cycle can only be cleared by cycling the ignition off and on once the fault has been corrected.

This pinpoint test is intended to diagnose the following:

- Fuse

- Battery condition

- Wiring, terminals or connectors

- ABS module

PINPOINT TEST A : DTC B1676

NOTE: DTC B1676 can be set if the vehicle has been recently jump started, the battery has been recently charged or the battery has been discharged. The battery may become discharged due to excessive load(s) on the charging system from aftermarket accessories or if the battery has been left unattended with the accessories on.

NOTE: Carry out a thorough inspection and verification before proceeding with the pinpoint test. Refer to Inspection and Verification. Inspection and Verification


A1 RETRIEVE ALL CMDTC (Continuous Memory Diagnostic Trouble Code) IN ALL MODULES

- Ignition ON.

- Enter the following diagnostic mode on the scan tool: Self Test- All CMDTCs (Continuous Memory Diagnostic Trouble Codes).

Is DTC B1317, B1318 or B1676 present in one or more modules AND P0563, P0620, P0625, P0626 or P065B present in the PCM?

Yes
REFER to Charging System for diagnosis of the battery and charging system.
No
GO to A2.

A2 CHECK BATTERY CONDITION

- Ignition OFF.

- Carry out the Battery- Condition Test. Pinpoint Tests

Does the battery pass the condition test?

Yes
If the battery passed the condition test but required a recharge, REFER to Charging System to diagnose the charging system. CLEAR all CMDTCs (Continuous Memory Diagnostic Trouble Codes). TEST the system for normal operation.

If the battery passed the condition test and did not require a recharge, GO to A3.
No
INSTALL a new battery. CLEAR all CMDTCs (Continuous Memory Diagnostic Trouble Codes). TEST the system for normal operation.

A3 CHECK CHARGING SYSTEM VOLTAGE

NOTE: Do not allow the engine speed to increase above 2,000 rpm while carrying out this step or the generator can self excite and result in default charging system output voltage. If engine speed goes above 2,000 rpm, shut the vehicle off and restart the engine before carrying out this step.

- Start the engine.

- Measure the voltage of the battery with and without a load on the charging system as follows:
- Turn off all accessories and run the engine at 1,500 rpm for a minimum of 2 minutes while measuring battery voltage.

- Turn the headlights on and the HVAC fan on high and run engine at 1,500 rpm for a minimum of 2 minutes while measuring battery voltage.







Are the voltages between 13 and 15.2 volts?

Yes
GO to A4.
No
REFER to Charging System to diagnose the charging system. CLEAR all CMDTCs (Continuous Memory Diagnostic Trouble Codes). TEST the system for normal operation.

A4 CHECK THE ABS MODULE GROUND CIRCUITS FOR AN OPEN

- Disconnect: Negative Battery Cable.

- Ignition OFF.

- Disconnect: ABS Module C135.

- Measure the resistance between ground and:
- ABS module C135-13, circuit GD121 (BK/YE), harness side.

- ABS module C135-38, circuit GD121 (BK/YE), harness side.







Are the resistances less than 5 ohms?

Yes
GO to A5.
No
REPAIR the affected circuit(s). CLEAR all CMDTCs (Continuous Memory Diagnostic Trouble Codes). REPEAT the self-test.

A5 CHECK FOR VOLTAGE AT THE ABS MODULE

- Connect: Battery Negative Cable.

- Ignition ON.

- Measure the voltage between ground and:
- ABS module C135-1, circuit SBB47 (WH/RD), harness side.

- ABS module C135-25, circuit SBB36 (GN/RD), harness side.

- ABS module C135-35, circuit CBB54 (VT/OG), harness side.







Are the voltages greater than 10 volts?

Yes
GO to A6.
No
VERIFY that Battery Junction Box (BJB) fuses 36 (30A), 47 (60A), and 54 (5A) are OK. If OK, REPAIR the affected circuit(s). If not OK, REFER to the Wiring Diagrams to identify the possible causes of the circuit short [1][2]Diagrams By Number. CLEAR the DTCs. REPEAT the self-test.

A6 CHECK FOR CORRECT ABS MODULE OPERATION

- Disconnect: ABS Module C135.

- Check the connector for:
- corrosion

- damaged pins

- pushed-out pins


- Connect: ABS Module C135.

- Make sure the connector seats correctly, then operate the system and verify the concern is still present.

Is the concern still present?

Yes
INSTALL a new ABS module. REFER to Anti-Lock Brake System (ABS) Module . TEST the system for normal operation.
No
The system is operating correctly at this time. Concern may have been caused by a loose or corroded connector. CLEAR the DTCs. REPEAT the self-test.