| Diagnosis and Testing Refer to Wiring Diagrams Section 413-13, for schematic and connector information. Principles of Operation The parking aid system detects objects behind the vehicle when the vehicle reverse gear select input to the parking aid module is enabled. The parking aid module does this by calculating the distance to an object by the use of four parking aid sensors mounted in the rear bumper. The sensors can detect objects approximately 1.5m to the rear of the vehicle. An intermittent warning tone is generated from the speaker in the parking aid speaker, located on the C-pillar trim. The interval between the tones decreases as the vehicle gets closer to an object. When an object is detected within 30cm of the sensors, the warning tone becomes continuous. Refer to the Owner Guide for the parking aid speaker operation. A short tone will sound from the parking aid speaker as a system check when the ignition switch is turned to position II and reverse gear is engaged. The system will always enable when the ignition switch is turned to position II and reverse gear is engaged. The parking aid system will be disabled if reverse gear is disengaged or if a concern is detected in one of the four parking aid sensors or the parking aid module. When the parking aid system is enabled and a concern is detected, the system will indicate this by a continuous tone from the parking aid speaker. If a short circuit is detected in the parking aid resistance plug, the system will indicate this by emitting an audible tone from the parking aid speaker for three seconds followed by a break for three seconds. This sequence will be repeated until reverse gear is disengaged. Inspection and Verification - Verify the customer concern.
- Visually inspect for obvious signs of electrical damage.
Visual Inspection Chart | Electrical | - Fuse(s)
- Relay(s)
- Wiring harness
- Electrical connector(s)
- Parking aid sensor(s)
- Parking aid display and speaker
- Reversing lamp switch
- Parking aid module
- Parking aid resistance plug
| - If an obvious cause for an observed or reported concern is found, correct the cause (if possible) before proceeding to the next step.
- If the cause is not visually evident, refer to the Parking Aid Module Reset Procedure.
Parking Aid Module Reset Procedure - Turn the ignition key to position 0.
- Disconnect the parking aid resistance plug.
- Turn the ignition key to position II.
- Select the reverse gear and then deselect the reverse gear.
- Turn the ignition key to position 0.
- Connect the parking aid resistance plug.
- TEST the system for normal operation. If the cause persists, refer to the Self-Diagnostic Mode.
Self-Diagnostic Mode - To enter the parking aid module Self-Diagnostic Mode, turn the ignition key to position 0, remove the parking aid resistance plug and make sure the vehicle is in neutral gear.
- Make sure that no obstacle is within 2 meters of the rear of the vehicle.
- Turn the ignition key to position II and select reverse gear.
- Self-Diagnostic Mode will be indicated by an audible tone for three seconds from the parking aid speaker, and is paused for one second.
- If a concern is detected with a parking aid sensor, the parking aid module will indicate this by emitting an audible tone sequence from the parking aid speaker.
- If there is a concern with more than one parking aid sensor, a second sequence will be emitted after the first.
- To exit the Self-Diagnostic Mode, select neutral, turn the ignition key to position 0 and install the parking aid resistance plug.
Audible Tone Sequence | Audible Tone Sequence | Description | Action | | ON for three seconds, pause for one second | Opening sequence for concern diagnostics | - | | ON and OFF once, pause for one second | Right-hand outer sensor concern | REFER to the Component Test in this procedure. | | ON and OFF twice, pause for one second | Right-hand inner sensor concern | REFER to the Component Test in this procedure. | | ON and OFF three times, pause for one second | Left-hand inner sensor concern | REFER to the Component Test in this procedure. | | ON and OFF four times, pause for one second | Left-hand outer sensor concern | REFER to the Component Test in this procedure. | | ON for seventy five milliseconds, pause for seventy five milliseconds | Module concern. Low battery voltage. Short in parking aid resistance plug circuit. | GO to Pinpoint Test A. | - If the concern remains after the Self-Diagnostic Mode, refer to the Symptom Chart.
Symptom Chart Symptom Chart | Symptom | Possible Sources | Action | | A continuous audible tone is emitted | * Parking aid sensor(s). * Parking aid module. * Parking aid resistance plug. | * REFER to the Self-Diagnostic Mode. | | The parking aid speaker has a continuous or intermittent tone when the reverse gear is selected | * Parking aid sensor(s) dirty or iced over. * Parking aid sensor(s) incorrectly installed. | * CLEAN the rear parking aid sensor(s). * INSTALL the rear parking aid sensor(s) correctly. | | Parking aid is inoperative/does not operate correctly | * Parking aid module. * Reversing lamp switch. * Circuit(s). * Parking aid speaker. * Parking aid resistance plug. | * | Pinpoint Test | PINPOINT TEST A : PARKING AID IS INOPERATIVE/DOES NOT OPERATE CORRECTLY | | TEST CONDITIONS | DETAILS/RESULTS/ACTIONS | | A1: CHECK THE REVERSING LAMP SWITCH | | | 1 Ignition switch in position II. | | | 2 Select reverse gear. | | | Are the reversing lamps operating correctly? Yes No REFER to: Reversing Lamps - Vehicles Built From: 08/2001 (417-01 Exterior Lighting, Diagnosis and Testing). | | A2: CHECK THE PARKING AID MODULE POWER SUPPLY | | | 1 Ignition switch in position 0. | | | 2 Disconnect Parking Aid Module C2008. | | | 3 Ignition switch in position II. | | | 4 Select reverse gear. | | | 5 Measure the voltage between the parking aid module C2008 pin 18, (RD), harness side and ground. | | | Is the voltage greater than 10 volts? Yes No CHECK and REPAIR the circuit between the parking aid module C2008 pin 18, (RD), harness side and reversing lamp switch C862 or C864 pin 11 (manual transaxle), or tranmission range (TR) sensor C438 pin 4, circuit 15S-TA38 (GN/BU) (automatic transaxle), harness side. If the circuit is OK, INSTALL a new parking aid module. TEST the system for normal operation. | | A3: CHECK THE PARKING AID MODULE GROUND CIRCUIT | | | 1 Ignition switch in position 0. | | | 2 Measure the resistance between the parking aid module C2008 pin 10, (BN), harness side and ground. | | | Is the resistance less than 5 ohms? Yes No CHECK and REPAIR the circuit between the parking aid module C2008 pin 10, (BN) harness side and ground. If the circuit is OK, INSTALL a new parking aid module. TEST the system for normal operation. | | A4: CHECK THE PARKING AID SPEAKER CIRCUIT FOR OPEN | | | 1 Ignition switch in position 0. | | | 2 Disconnect Parking Aid Speaker C1016. | | | 3 Disconnect Parking Aid Module C2008. | | | 4 Measure the resistance between the parking aid module C2008 pin 1, (BN), harness side and the parking aid speaker C1016 pin 1, (BN), harness side. | | | Is the resistance less than 5 ohms? Yes No REPAIR the circuit between the parking aid module C2008 pin 1, (BN), harness side and the parking aid speaker C1016 pin 1, (BN), harness side. If the circuit is OK, INSTALL a new parking aid speaker. TEST the system for normal operation. | | A5: CHECK THE PARKING AID SPEAKER CIRCUIT FOR OPEN | | | 1 Measure the resistance between the parking aid module C2008 pin 2, (BN/RD), harness side and the parking aid speaker C1016 pin 2, (BN/RD), harness side. | | | Is the resistance less than 5 ohms? Yes No REPAIR the circuit between the parking aid module C2008 pin 2, (BN/RD), harness side and the parking aid speaker C1016 pin 2, (BN/RD), harness side. If the circuit is OK, INSTALL a new parking aid speaker. TEST the system for normal operation. | | A6: CHECK THE PARKING AID RESISTANCE PLUG CIRCUIT FOR SHORT TO GROUND | | | 1 Disconnect Parking Aid Resistance Plug. | | | 2 Measure the resistance between the parking aid module C2008 pin 24, (PK), harness side and ground. | | | Is the resistance greater than 10,000 ohms? Yes No CHECK and REPAIR the circuit between the parking aid module C2008 pin 24, (PK), harness side and ground. If the circuit is OK, INSTALL a new parking aid resistance plug. TEST the system for normal operation. | | A7: CHECK THE PARKING AID RESISTANCE PLUG CIRCUIT FOR SHORT TO GROUND | | | 1 Measure the resistance between the parking aid module C2008 pin 25, (PK), harness and ground. | | | Is the resistance greater than 10,000 ohms? Yes INSTALL a new parking aid module. TEST the system for normal operation. No CHECK and REPAIR the circuit between the parking aid module C2008 pin 25, (PK), harness and ground. If the circuit is OK, INSTALL a new parking aid resistance plug. TEST the system for normal operation. | Component Tests Parking Aid Sensor Wiring Harness NOTE:Refer to the Wiring Diagram, Section 413-13 for Schematic and Connector information. NOTE:Check the parking aid wiring harness for short to ground, short to battery or damage. - Test the parking aid sensor wiring harness using the following table as a guide to meter lead placement as well as expected values.
| Parking Aid Sensor C2105 | Parking Aid Module C2008 | Expected Value | Action | | Pin 1 | Pin 4 | Less than 5 ohms | If the resistance is greater than 5 ohms, CHECK and REPAIR the circuit. If the circuit is OK, INSTALL a new parking aid sensor. TEST the system for normal operation | | Pin 2 | Pin 10 | Less than 5 ohms | If the resistance is greater than 5 ohms, CHECK and REPAIR the circuit. If the circuit is OK, INSTALL a new parking aid sensor. TEST the system for normal operation | | Pin 3 | Pin 11 | Less than 5 ohms | If the resistance is greater than 5 ohms, CHECK and REPAIR the circuit. If the circuit is OK, INSTALL a new parking aid sensor. TEST the system for normal operation | | Parking Aid Sensor C2106 | Parking Aid Module C2008 | Expected Value | Action | | Pin 1 | Pin 3 | Less than 5 ohms | If the resistance is greater than 5 ohms, CHECK and REPAIR the circuit. If the circuit is OK, INSTALL a new parking aid sensor. TEST the system for normal operation | | Pin 2 | Pin 10 | Less than 5 ohms | If the resistance is greater than 5 ohms, CHECK and REPAIR the circuit. If the circuit is OK, INSTALL a new parking aid sensor. TEST the system for normal operation | | Pin 3 | Pin 11 | Less than 5 ohms | If the resistance is greater than 5 ohms, CHECK and REPAIR the circuit. If the circuit is OK, INSTALL a new parking aid sensor. TEST the system for normal operation | | Parking Aid Sensor C2107 | Parking Aid Module C2008 | Expected Value | Action | | Pin 1 | Pin 2 | Less than 5 ohms | If the resistance is greater than 5 ohms, CHECK and REPAIR the circuit. If the circuit is OK, INSTALL a new parking aid sensor. TEST the system for normal operation | | Pin 2 | Pin 10 | Less than 5 ohms | If the resistance is greater than 5 ohms, CHECK and REPAIR the circuit. If the circuit is OK, INSTALL a new parking aid sensor. TEST the system for normal operation | | Pin 3 | Pin 11 | Less than 5 ohms | If the resistance is greater than 5 ohms, CHECK and REPAIR the circuit. If the circuit is OK, INSTALL a new parking aid sensor. TEST the system for normal operation | | Parking Aid Sensor C2108 | Parking Aid Module C2008 | Expected Value | Action | | Pin 1 | Pin 1 | Less than 5 ohms | If the resistance is greater than 5 ohms, CHECK and REPAIR the circuit. If the circuit is OK, INSTALL a new parking aid sensor. TEST the system for normal operation | | Pin 2 | Pin 10 | Less than 5 ohms | If the resistance is greater than 5 ohms, CHECK and REPAIR the circuit. If the circuit is OK, INSTALL a new parking aid sensor. TEST the system for normal operation | | Pin 3 | Pin 11 | Less than 5 ohms | If the resistance is greater than 5 ohms, CHECK and REPAIR the circuit. If the circuit is OK, INSTALL a new parking aid sensor. TEST the system for normal operation | |
