PINPOINT TEST I: DTCs U3003:16 AND 17
WARNING: This page is about a different car, the 2010 Mercury Mariner and 2010 Ford Escape. However, it is still accessible from the selected car via links, so may be relevant.
- I1 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 present in one or more modules and DTC P0563, P0620, P0625, P0626 or P065B present in the PCM?
- Yes: REFER to DIAGNOSIS AND TESTING for diagnosis of the battery and charging system.
- No: GO to I2 .
- I2 CHECK BATTERY CONDITION
- Ignition OFF.
- Refer to PINPOINT TEST A: BATTERY CONDITION TEST and carry out the Battery Condition Test.
- Does the battery pass the condition test?
- Yes:
If the battery passed the condition test but required a recharge, REFER to
DIAGNOSIS AND TESTING
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 I3 .
- No: INSTALL a new battery. CLEAR all CMDTCs. TEST the system for normal operation.
- I3 CHECK THE CHARGING SYSTEM VOLTAGE NOTE: Do not allow the engine RPM 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 RPM has gone above 2,000 RPM, shut the vehicle OFF and restart the engine before performing this step.
- Start the engine.
- Measure the voltage of the battery:
- For DTC U3003:17 , turn off all accessories and run the engine at 1,500 RPM for a minimum of 2 minutes.
- For DTC U3003:16 , turn on headlights and HVAC fan on high and run engine at 1,500 RPM for a minimum of 2 minutes.
- Is the battery voltage between 13-15.2 volts?
- Yes: For DTC U3003:17
, GO to I4
.
For DTC U3003:16 , INSTALL a new HVAC module. REFER to HEATING VENTILATION AIR CONDITIONING (HVAC) MODULE . CLEAR all CMDTCs . REPEAT the self-test.
- No: REFER to DIAGNOSIS AND TESTING to diagnose the charging system. CLEAR all CMDTCs . TEST the system for normal operation.
- I4 CHECK CIRCUIT SBP15 (WH/RD) FOR AN OPEN
- Ignition OFF.
- Disconnect: HVAC Module C2356A.
- Ignition ON.
- With the engine running, measure the voltage between HVAC module C2356A-13, circuit SBP15 (WH/RD), harness side and ground.
- Is the voltage greater than 10 volts?
- Yes: GO to I5 .
- No: VERIFY Smart Junction Box (SJB) fuse 15 (10A) is OK. If OK, REPAIR circuit SBP15 (WH/RD) for an open. CLEAR all CMDTCs . REPEAT the self-test. If not OK, REFER to the appropriate SYSTEM WIRING DIAGRAMS article to identify the possible causes of the circuit short.
- I5 CHECK CIRCUIT GD133 (BK) FOR AN OPEN
- Ignition OFF.
- Measure the resistance between HVAC module C2356A-23, circuit GD114 (BK/BU), harness side and ground.
- Repeat this measurement while wiggling the harness.
- Is the resistance less than 5 ohms?
- Yes: GO to I6 .
- No: REPAIR circuit GD114 (BK/BU) for an open. TEST the system for normal operation.
- I6 CHECK THE MODULE CONNECTION
- Inspect the module connectors for:
- corrosion.
- pushed-out terminals.
- damaged terminals.
- Connect and correctly seat all the HVAC module connectors.
- Clear the DTCs.
- Operate the system and verify the concern is still present.
- Is the concern still present?
- Yes: INSTALL a new HVAC module. REFER to HEATING VENTILATION AIR CONDITIONING (HVAC) MODULE . TEST the system for normal operation.
- No: The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector.
- Inspect the module connectors for: