Pinpoint Test D : P0625, P0626
NOTE:
Make sure battery voltage is greater than 12.2 volts prior to and during this pinpoint test.
NOTE:
Do not have a battery charger attached during vehicle testing.
- D1 CHECK THE BATTERY CONDITION
- Carry out Battery Condition Test to determine if the battery can hold a charge and is OK for use. Go to Pinpoint Test A
Does the battery pass the condition test?
Yes GO to D2. No INSTALL a new battery. REFER to Battery, Mounting and Cables - D2 CHECK THE GENERATOR CONNECTIONS
- Ignition OFF.
- Disconnect and inspect all generator connectors.
- Repair:
- corrosion (install new connector or terminals - clean module pins)
- damaged or bent pins - install new terminals/pins
- pushed-out pins - install new pins as necessary
- Connect the generator connectors. Make sure they seat, latch correctly and are tightened to specification. REFER to Battery, Mounting and Cables , Torque Specifications.
- Measure and record:
Positive Lead Measurement / Action Negative Lead
Battery Positive Post
Battery Negative Post
- Measure:
Positive Lead Measurement / Action Negative Lead C102B-1 Ground
Is the voltage within 0.5 volt of recorded battery voltage?
Yes GO to D3. No VERIFY the fusible links are OK. If OK, REPAIR the circuit. If not OK, REFER to the SYSTEM WIRING DIAGRAMS article to identify the Possible Sources of the circuit short. - D3 CHECK THE VOLTAGE DROP IN THE B+ CIRCUIT
- Start the engine.
- With the engine running at idle, headlamps on and blower on high, measure:
Positive Lead Measurement / Action Negative Lead C102B-1
Battery Positive Post
- Carry out a wiggle test of the generator wiring and connections while measuring voltage drop.
Is the voltage drop less than 0.5 volt?
Yes For DTC P0625, GO to D4. For DTC P0626, GO to D5. No INSPECT and REPAIR any corrosion in the generator B+ circuit or positive battery cable connections. - D4 "A" SENSE CIRCUIT LOAD TESTNOTE: The following step uses a test light to simulate normal circuit loads. Use only the test light recommended. To avoid connector terminal damage, use the Flex Probe Kit for the test light probe connection to the vehicle. Do not use the test light probe directly on any connector.NOTE: This step puts a load on the "A" sense circuit. If there are corroded or loose connections, loading the circuit may help show the fault. A 250-350 mA incandescent 12-volt test lamp is required for this step. This circuit cannot be loaded correctly using an LED-style test lamp.
- Ignition OFF.
- Disconnect: Generator C102A .
- Measure battery voltage and record:
Positive Lead Measurement / Action Negative Lead
Battery Positive Post
Battery Negative Post
- Ignition ON.
- Using a 12-volt test lamp connected to ground, while performing a wiggle test on the generator harness, measure voltage at:
Positive Lead Measurement / Action Negative Lead C102A-3 Test Lamp Ground
Is the "A" sense voltage equal to battery voltage?
Yes GO to D5. No VERIFY BJB fuse 58 (10A) is OK. If OK, REPAIR the circuit. If not OK, REFER to the SYSTEM WIRING DIAGRAMS article to identify the Possible Sources of the circuit short. - D5 CHECK THE GENERATOR MONITOR CIRCUIT FOR A SHORT TO VOLTAGE
- Ignition ON.
- Measure:
Positive Lead Measurement / Action Negative Lead C102A-1 Ground
Is any voltage present?
Yes REPAIR the circuit. No GO to D6. - D6 CHECK THE GENERATOR MONITOR CIRCUIT FOR A SHORT TO GROUND
- Ignition OFF.
- Measure:
Positive Lead Measurement / Action Negative Lead C102A-1 Ground
Is the resistance greater than 10, 000 ohms?
Yes GO to D7. No REPAIR the circuit. - D7 CHECK THE GENERATOR MONITOR CIRCUIT FOR AN OPEN
Is the resistance less than 3 ohms?
Yes GO to D8. No REPAIR the circuit. - D8 CHECK THE GENERATOR B+ INTERNAL RESISTANCE
- Disconnect: Generator C102B .
- Measure:
Positive Lead Measurement / Action Negative Lead
Generator B+ (component side)
Generator Case
Is the resistance greater than 25K ohms?
Yes GO to D9. No INSTALL a new generator. REFER to Generator - 2.0L GTDI or REFER to Generator - 3.5L GTDI or REFER to Generator - 3.5L Ti-VCT . - D9 CHECK THE RESISTANCE OF THE VOLTAGE REGULATOR INTERNAL CIRCUITS TO GROUND
- Measure:
Positive Lead Measurement / Action Negative Lead (Component side) C102A-1
Generator Case(Component side) C102A-2
Generator Case(Component side) C102A-3
Generator Case
Are the resistances greater than 10, 000 ohms?
Yes GO to D10. No INSTALL a new generator. REFER to Generator - 2.0L GTDI or REFER to Generator - 3.5L GTDI or REFER to Generator - 3.5L Ti-VCT . - Measure:
- D10 COMPARE THE GENERATOR MONITOR (GENMON) AND GENERATOR COMMAND (GENCMD) PIDs
- Start the engine.
- Using a scan tool, view the PCM PIDs.
- Using the active command, set the GENVDSD PID to 14.0 volts.
- Monitor the GENMON and GENCMD PIDs while carrying out a wiggle test on the generator wiring harness.
Do the PIDs read within 2% of each other?
Yes REMOVE the fused jumper wire. INSTALL a new generator. REFER to Generator - 2.0L GTDI or REFER to Generator - 3.5L GTDI or REFER to Generator - 3.5L Ti-VCT . No REMOVE the fused jumper wire. GO to D11. - D11 CHECK FOR CORRECT PCM OPERATION
- Ignition OFF.
- Disconnect and inspect all PCM connectors.
- Repair:
- corrosion (install new connector or terminals - clean module pins)
- damaged or bent pins - install new terminals/pins
- pushed-out pins - install new pins as necessary
- Reconnect the PCM and generator connectors. Make sure they seat and latch correctly.
- Operate the system and determine if the concern is still present.
Is the concern still present?
Yes CHECK OASIS for any applicable TSBs. If a TSB exists for this concern, DISCONTINUE this test and FOLLOW the TSB instructions. If no TSBs address this concern, INSTALL a new PCM. REFER to Electronic Engine Controls - 2.0L GTDI or REFER to Electronic Engine Controls - 3.5L GTDI or REFER to Electronic Engine Controls - 3.5L Ti-VCT. No The system is operating correctly at this time. The concern may have been caused by module connections. ADDRESS the root cause of any connector or pin issues.
