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Home/Ford/Escape/Ford Escape I facelift 2 (2007-2012)/Repair manual/Collision/avoidance/Parking Aid System: Overview
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Parking Aid System: Overview Ford Escape I facelift 2

Collision/avoidance ~1022 words

Principles of Operation

Note. The Smart Junction Box (SJB) is also known as the Generic Electronic Module (GEM).

The parking aid system detects objects behind the vehicle when the REVERSE (R) gear is selected. The Parking Aid Module (PAM) calculates the distance to an object by the use of 4 ultrasonic sensors mounted in the rear bumper. The PAM does this by calculating the distance to an object within the 170 degree semicircular azimuth area around the rear of the vehicle.

The parking aid sensors detect objects approximately 1.8 m (5.9 ft) from the rear of the vehicle, 50 cm (1.6 ft) from the rear side of the vehicle, and 16 cm (6 in) above the ground. A variable rate warning tone is generated from a parking aid speaker attached to the PAM. The parking aid speaker increases its warning tone rate as the vehicle gets closer to an obstacle. When an object is detected within 25 cm (10 in) of the sensors, the warning tone becomes continuous.

The PAM will prove out the indicator, located in the parking aid disable switch, by illuminating the indicator for 3 seconds. If the PAM detects a failure, it illuminates the indicator for as long as the failure condition exists and the ignition switch is in the RUN position. The PAM is on the ISO 9141 network and can be diagnosed with a scan tool.

Normal Operation

The parking aid system is enabled when the vehicle ignition is in RUN and REVERSE (R) is selected. The Parking Aid Module (PAM) supplies voltage to the parking aid sensors on circuit LMP07 (BU/WH). The PAM supplies ground to the parking aid sensors on circuit RMP07 (GN/WH). The PAM receives a signal from the parking aid sensors on circuits VMP17 (YE/OG), VMP16 (YE/GY), VMP14 (WH/OG) and VMP15 (YE/GN). The system can be disabled through the disable switch. A variable rate warning tone is generated from a parking aid speaker which increases the warning tone rate as the vehicle gets closer to an obstacle.

This pinpoint test is intended to diagnose the following

  1. Wiring, terminals or connectors
  2. Rear bumper cover
  3. Parking aid sensor alignment
  4. Parking aid disable switch
  5. PAM

The Parking Aid Module (PAM) supplies voltage to the parking aid sensors on circuit LMP07 (BU/WH). The PAM supplies ground to the parking aid sensors on circuit RMP07 (GN/WH). The PAM receives a signal from the parking aid sensors on circuits VMP17 (YE/OG), VMP16 (YE/GY), VMP14 (WH/OG) and VMP15 (YE/GN).

DTC DescriptionFault Trigger Conditions
C1700 - Left Rear Sensor Circuit Failure or BlockageSets when the PAM senses an open on circuit LMP07 (BU/WH), circuit RMP07 (GN/WH) or circuit VMP15 (YE/GN), or a short to ground on circuit VMP15 (YE/GN).
C1703 - Right Rear Sensor Circuit Failure or BlockageSets when the PAM senses an open on circuit LMP07 (BU/WH), circuit RMP07 (GN/WH) or circuit VMP17 (YE/OG), or a short to ground on circuit VMP17 (YE/OG).
C1706 - Left Rear Center Sensor Circuit FailureSets when the PAM senses an open on circuit LMP07 (BU/WH), circuit RMP07 (GN/WH) or circuit VMP14 (WH/OG), or a short to ground on circuit VMP14 (WH/OG).
C1709 - Right Rear Center Sensor Circuit FailureSets when the PAM senses an open on circuit LMP07 (BU/WH), circuit RMP07 (GN/WH) or circuit VMP16 (YE/GY), or a short to ground on circuit VMP16 (YE/GY).

DTC DESCRIPTION CHART

This pinpoint test is intended to diagnose the following

  1. Wiring, terminals or connectors
  2. Parking aid sensor(s)
  3. PAM

The Parking Aid Module (PAM) supplies voltage to the parking aid sensors on circuit LMP07 (BU/WH). The PAM supplies ground to the parking aid sensors on circuit RMP07 (GN/WH). The PAM receives a signal from the parking aid sensors on circuits VMP17 (YE/OG), VMP16 (YE/GY), VMP14 (WH/OG) and VMP15 (YE/GN).

DTC DescriptionFault Trigger Conditions
C1699 - Left Rear Sensor Circuit Short to VbatSets when the PAM senses a short to voltage on circuit VMP15 (YE/GN).
C1702 - Right Rear Sensor Circuit Short to VbatSets when the PAM senses a short to voltage on circuit VMP17 (YE/OG).
C1705 - Left Rear Center Sensor Circuit Short to VbatSets when the PAM senses a short to voltage on circuit VMP14 (WH/OG).
C1708 - Right Rear Center Sensor Circuit Short to VbatSets when the PAM senses a short to voltage on circuit VMP16 (YE/GY).

DTC DESCRIPTION CHART

This pinpoint test is intended to diagnose the following

  1. Wiring, terminals or connectors
  2. Parking aid sensor
  3. PAM

The parking aid system is enabled when the vehicle ignition is in RUN and REVERSE (R) is selected. The Parking Aid Module (PAM) calculates the distance to an object by the use of 4 ultrasonic sensors mounted in the rear bumper. The parking aid sensors can detect obstructions in the path behind the vehicle. A variable rate warning tone is generated from a parking aid speaker. The parking aid speaker increases the warning tone rate as the vehicle gets closer to an obstacle.

If no objects are present, the parking aid PIDs should read 255 cm (100 in).

DTC DescriptionFault Trigger Conditions
C1701 - Left Rear Sensor Circuit FaultSets when the PAM senses an internal sensor fault or the wrong sensor attenuation time on the left rear outer sensor.
C1704 - Right Rear Sensor Circuit FaultSets when the PAM senses an internal sensor fault or the wrong sensor attenuation time on the right rear outer sensor.
C1707 - Left Rear Center Sensor Circuit FaultSets when the PAM senses an internal sensor fault or the wrong sensor attenuation time on the left rear inner sensor.
C1710 - Right Rear Center Sensor Circuit FaultSets when the PAM senses an internal sensor fault or the wrong sensor attenuation time on the right rear inner sensor.

DTC DESCRIPTION CHART

This pinpoint test is intended to diagnose the following

  1. Parking aid sensor
  2. PAM

Voltage is supplied to the parking aid sensors from the Parking Aid Module (PAM) on circuit LMP07 (BU/WH). The PAM supplies ground to the parking aid sensors on circuit RMP07 (GN/WH).

  1. DTC B1299 (Power Supply Sensor Circuit Short to Ground) - sets when the sensor power supply circuit is shorted to ground or to circuit RMP07 (GN/WH).

This pinpoint test is intended to diagnose the following

  1. Wiring, terminals or connectors
  2. Parking aid sensor(s)
  3. Parking aid bumper harness
  4. PAM

A variable rate warning tone is generated from a parking aid speaker. The parking aid speaker increases the warning tone rate as the vehicle gets closer to an obstacle.

  1. DTC C1742 (Rear Sounder Circuit Failure) - sets when the Parking Aid Module (PAM) senses an open or short to ground on circuit CMP09 (BN/BU) or RMP09 (BU/GN).
  2. DTC C1743 (Rear Sounder Circuit Short to Vbatt) - sets when the PAM senses a short to voltage on circuit RMP09 (BU/GN).

This pinpoint test is intended to diagnose the following

  1. Wiring, terminals or connectors
  2. Parking aid speaker
  3. PAM

The parking aid system is enabled when the vehicle ignition is in RUN and REVERSE (R) is selected. The system can be disabled by the parking aid disable switch When the parking aid disable switch is pressed the Parking Aid Module (PAM) receives a momentary ground signal on circuit CMP 18 (GN/BN), disabling the parking aid system.

  1. DTC C1748 (Switch Input Circuit Short to Gnd) - sets when the parking aid module (PAM) senses a short to ground on circuit CMP 18 (GN/BN). This DTC sets in continuous memory only.

This pinpoint test is intended to diagnose the following

  1. Wiring, terminals or connectors
  2. Parking aid disable switch
  3. PAM

The parking aid system is enabled when the vehicle ignition is in RUN and REVERSE (R) is selected. The system can be disabled by the parking aid disable switch. The Parking Aid Module (PAM) sends a signal to the LED through circuit CMP02 (GN/BU) when the parking aid is disabled. The switch is grounded through circuit GD114 (BK/BU).

  1. DTC B2373 (LED #1 Circuit Short to Battery) - sets when the PAM senses a short to voltage on circuit CMP02 (GN/BU).
  2. DTC C1920 (Led #1 Circuit Failure) - sets when the PAM senses an open or short to ground on circuit CMP02 (GN/BU).

This pinpoint test is intended to diagnose the following

  1. Wiring, terminals or connectors
  2. Parking aid disable switch
  3. PAM

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