Pinpoint Test A: DTC B1676
NOTE:
Use the Flex Probe Kit for all test connections to prevent damage to the wiring terminals. Do not use standard multi-meter probes.
- A1 RETRIEVE ALL CMDTCs IN ALL MODULES
- Ignition ON.
- Enter the following diagnostic mode on the scan tool: Self Test - ALL CMDTCs.
- Is DTC B1317, B1318 or B1676 retrieved from more than one module And P0563, P0620, P0626 or P065B retrieved from the PCM?
- Yes : REFER to CHARGING SYSTEM article to diagnose the charging system. CLEAR the DTCs. REPEAT the self-test.
- No : GO to A2.
- A2 TEST BATTERY CONDITION
- Ignition OFF.
- Carry out the Battery Condition Test. Refer to BATTERY, BATTERY MOUNTING & BATTERY CABLES article.
- Did the battery pass the condition test?
- Yes
: If the battery passed the condition test, but required a recharge, REFER to
CHARGING SYSTEM
article to diagnose the charging system. CLEAR all Continuous Memory Diagnostic Trouble Codes (CMDTCs). 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 the DTCs. REPEAT the self-test.
- A3 CHECK CHARGING SYSTEM VOLTAGE NOTE: Do not allow the engine speed to increase above 2, 000 rpm while performing this step or the generator may 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 performing this step.
- 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 on headlights and 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 article to diagnose the charging system. CLEAR the DTCs. REPEAT the self-test.
- Measure the voltage of the battery with and without a load on the charging system as follows:
- A4 CHECK FOR VOLTAGE TO THE ABS MODULE
- Ignition OFF.
- Disconnect: ABS Module C135.
- Ignition ON.
- Measure the voltage between ground and:
- ABS module C135-1, circuit SBB09 (RD), harness side.
- ABS module C135-25, circuit SBB12 (GN/RD), harness side.
- ABS module C135-35, circuit CBP34 (VT/BN), harness side.
- Are the voltages greater than 10 volts?
- Yes : GO to A5.
- No
: VERIFY BJB fuse 9 (40A), fuse 12 (20A) and SJB fuse 34 (5A) are OK. If OK, REPAIR the affected circuit(s). CLEAR the DTCs. REPEAT the self-test.
If not OK, REFER to the SYSTEM WIRING DIAGRAMS article, to identify possible causes of the circuit short. CLEAR the DTCs. REPEAT the self-test.
- A5 CHECK CIRCUIT GD120 (BK/GN) FOR AN OPEN
- Ignition OFF.
- Measure the resistance between ground and:
- ABS module C135-13, circuit GD120 (BK/GN), harness side.
- ABS module C135-38, circuit GD120 (BK/GN), harness side.
- Are the resistances less than 5 ohms?
- Yes : CLEAR the DTCs. REPEAT the self-test. If DTC B1676 is retrieved again, GO to A6.
- No
: REPAIR circuit GD120 (BK/GN). CLEAR the DTCs.
REPEAT the self-test.
- A6 CHECK FOR CORRECT ABS MODULE OPERATION
- Check ABS module C135 for:
- corrosion.
- pushed-out pins.
- spread terminals.
- Connect the ABS module connector and make sure it seats correctly.
- 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 in this service information. CLEAR the DTCs. REPEAT the self-test.
- No : The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector. CLEAR the DTCs. REPEAT the self-test.
- Check ABS module C135 for: