Service Information

Captiva

On-Board Diagnostic Features

Note: Only use this diagnostic for vehicles without DTC capabilities (long wheel base).

Self Sensor Error Check

Circuit Description

If system fault is detected by a warning indicator or the alarm, perform the diagnosis for sensor circuit before the other circuits in the parking assist system. The parking assist control module can perform the error check for the each rear object sensor by using self sensor error check mode. Below is the procedure that should be performed in order to enter the sensor error check mode.

Turn the ignition ON.
Place the transmission in REVERSE.
The control module will start the sensor error check mode.

Sensor Error Alarm Pattern

If the sensor circuit fault is not detected, the control module will ring the normal alarm (once for 0.3 second). If the sensor circuit fault is detected, the alarm pattern will follow the table below according to the faulty sensor circuit. For rear sensor the audible noise will be a "chime" tone, for front sensor a "beep".

Left Rear Corner Sensor

A 40 ms chime with 1 second pause

Rear Middle Sensor

Two 40 ms chimes followed by a 1 second pause

Right Rear Corner Sensor

Three 40 ms chimes followed by a 1 second pause

Left Front Corner Sensor

A 40 ms beep with 1 second pause

Left Front Middle Sensor

Two 40 ms beeps followed by a 1 second pause

Right Front Middle Sensor

Three 40 ms beeps followed by a 1 second pause

Right Front Corner Sensor

Four 40 ms beeps followed by a 1 second pause

•	1 cycle is 3 seconds.

•	The alarm will perform the above sequence for 6 cycles.

•	If the fault is detected in several sensors, the control module will repeat the alarm pattern twice for the faulty sensors, following the order:

Front Left Corner
Front Left Middle
Front Right Middle
Front Right Corner
Rear Left Corner
Rear Middle
Rear Right Corner

Step	Action	Value(s)	Yes	No
1	Turn the ignition ON. Observe the parking assist warning indicator. Does the indicator illuminate for 4 seconds and then switch off?	-	System OK	Go to Step 2
2	Remove all objects at least 2 meters from the rear and front bumpers. Start the sensor error check mode by placing the transmission in REVERSE. Does the alarm appear as the normal mode (only once for 0.3 seconds)?	-	Go to Information Centre Indicator lamp Malfunction	Go to Step 3
3	Determine which sensor circuit(s) has the fault by referring to the Sensor Error Alarm Pattern. Did you find the suspected sensor circuit(s)?	-	Go to Step 4	-
4	Check for a poor connection on the suspected sensor(s). Did you find and correct the condition?	-	Go to Step 11	Go to Step 5
5	Turn the ignition OFF. Disconnect the connector(s) of suspected sensor(s). Turn the ignition ON. Check the voltage the between the signal circuit and the low reference circuit of suspected sensor(s). Is the voltage within the specified value?	8 V	Go to Step 8	Go to Step 6
6	Turn the ignition OFF. Disconnect the connector of parking assist control module. Check for an open or a short to ground/B+ of the signal circuit at suspected sensor circuit(s). Did you find and correct the condition?	-	Go to Step 11	Go to Step 7
7	Check for an open or a short to ground of the low reference circuit at suspected sensor circuit(s). Did you find and correct the condition?	-	Go to Step 11	Go to Step 10
8	Check for a poor connection on the parking assist control module. Did you find and correct the condition?	-	Go to Step 11	Go to Step 9
9	Replace the suspected rear object sensor(s). Did you do the replacement?	-	Go to Step 11	-
10	Replace the parking assist control module. Perform the BCM reprogramming procedure. Did you complete the replacement?	-	Go to Step 11	-
11	Operate the system in order to verify the repair. Did you correct the condition?	-	Go to Step 1	-