Pinpoint Test E : B1B44: 12, B1B46: 12, B1B48: 12, B1B50: 12
- NOTE: Before disconnecting the PAM or any of the parking aid sensors, verify the connectors are properly seated and latched.
Normal Operation and Fault Conditions
REFER to: Parking Aid - System Operation and Component Description .
DTC Fault Trigger Conditions
DTC Description Fault Trigger Condition PAM B1B44: 12 Right Rear Outer Sensor: Circuit Short To Battery A continuous and on-demand DTC that sets in the PAM when the RHR outer parking aid sensor signal circuit is shorted to battery voltage. PAM B1B46: 12 Right Rear Inner Sensor: Circuit Short To Battery A continuous and on-demand DTC that sets in the PAM when the RHR Inner parking aid sensor signal circuit is shorted to battery voltage. PAM B1B48: 12 Left Rear Outer Sensor: Circuit Short To Battery A continuous and on-demand DTC that sets in the PAM when the LHR outer parking aid sensor signal circuit is shorted to battery voltage. PAM B1B50: 12 Left Rear Inner Sensor: Circuit Short To Battery A continuous and on-demand DTC that sets in the PAM when the LHR inner parking aid sensor signal circuit is shorted to battery voltage. Possible Sources
- Wiring, terminals or connectors
- Rear Parking aid sensor
- PAM
- E1 RETRIEVE THE DIAGNOSTIC TROUBLE CODES (DTCS) FROM THE PAM (PARKING ASSIST CONTROL MODULE) SELF-TEST
- Ignition ON.
- Using a diagnostic scan tool, perform the PAM self-test.
- Check the PAM Diagnostic Trouble Codes (DTCs) from the self-test.
Are multiple rear parking aid sensor Diagnostic Trouble Codes (DTCs) recorded?
Yes GO to E2 No For Diagnostic Trouble Codes (DTCs) B1B44: 12, B1B46: 12. B1B48: 12, and B1B50: 12 GO to E3 For all other Diagnostic Trouble Codes (DTCs), REFER to Diagnostic Trouble Code (DTC) Chart in this information. - E2 CHECK THE REAR BUMPER WIRING HARNESS
- Ignition OFF.
- Inspect the rear bumper wiring harness for opens, shorts, grounds, or corrosion.
Is the rear bumper wiring harness OK?
Yes GO to E3 No REPAIR or INSTALL a new bumper wiring harness. - E3 CHECK THE REAR SENSOR CIRCUITRY FOR SHORTS TO VOLTAGE
- Ignition OFF.
- Disconnect: Suspect Parking Aid Sensor(s).
- Ignition ON.
- Measure:
DTC B1B44: 12
Positive Lead Measurement / Action Negative Lead Refer to C4011-2 Ground
- Measure:
DTC B1B46: 12
Positive Lead Measurement / Action Negative Lead Refer to C4009-2 Ground
- Measure:
DTC B1B48: 12
Positive Lead Measurement / Action Negative Lead Refer to C4010-2 Ground
- Measure:
DTC B1B50: 12
Positive Lead Measurement / Action Negative Lead Refer to C4012-2 Ground
Is any voltage present?
Yes REPAIR the circuit in question. No GO to E4 - E4 CHECK THE REAR PARKING AID SENSOR SIGNAL AND VREF CIRCUITS FOR A SHORT TOGETHER
- Ignition OFF
- Disconnect: PAM C4014A
- Measure:
DTC B1B44: 12
Positive Lead Measurement / Action Negative Lead Refer to C4011-2 Refer to C4011-1
- Measure:
DTC B1B46: 12
Positive Lead Measurement / Action Negative Lead Refer to C4012-2 Refer to C4012-1
- Measure:
DTC B1B48: 12
Positive Lead Measurement / Action Negative Lead Refer to C4009-2 Refer to C4009-1
- Measure:
DTC B1B50: 12
Positive Lead Measurement / Action Negative Lead Refer to C4010-2 Refer to C4010-1
Is the resistance greater than 10, 000 ohms?
Yes If all the sensor Diagnostic Trouble Codes (DTCs) are set, GO to E5 If one or more parking aid sensor(s) recorded Diagnostic Trouble Codes (DTCs), INSTALL a new sensor(s) for the one in question. No REPAIR the circuits in question. - E5 CHECK FOR CORRECT PAM (PARKING ASSIST CONTROL MODULE) OPERATION
- Ignition OFF.
- Disconnect and inspect all PAM and related in-line 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 PAM and related in-line 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 Technical Service Bulletins (TSBs). If a TSB exists for this concern, DISCONTINUE this test and FOLLOW the TSB instructions. If no TSB addresses this concern, INSTALL a new PAM. REFER to: Parking Assist Control Module (PAM) . No The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector. ADDRESS the root cause of any connector or pin issues.