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DTC B258A > < Stop Lamps Malfunction

Astra J

Turn Signal Lamps and/or Indicators Malfunction

Diagnostic Instructions

•  Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure.
•  Review Strategy Based Diagnosis for an overview of the diagnostic approach.
•  Diagnostic Procedure Instructions provides an overview of each diagnostic category.

Diagnostic Fault Information



Circuit
Short to Ground
Open/High Resistance
Short to Voltage
Signal Performance

Left Front Turn Signal Lamp Control
B3948 02
B3948 04
4
-

Right Front Turn Signal Lamp Control
B3949 02
B3949 04
5
-

Left Rear Turn Signal Lamp Control
B3950 02
B3950 04
6
-

Right Rear Turn Signal Lamp Control
B3951 02
B3951 04
7
-

Left Repeater Lamp Control
B3948 02
B3948 04
8
-

Right Repeater Lamp Control
B3949 02
B3949 04
9
-

Left Turn Signal Switch Signal
2
2
2
-

Right Turn Signal Switch Signal
3
3
3
-

Left Tail Lamp Ground
-
6
6
-

Right Tail Lamp Ground
-
7
7
-

Left Repeater Lamp Ground
-
8
8
-

Right Repeater Lamp Ground
-
9
9
-

Left Front Turn Signal Lamp Ground
-
4
4
-

Right Front Turn Signal Lamp Ground
-
5
5
-

Turn Signal/Multi-Function Switch Ground
-
1
1
-

1. All Turn Signals Lamps and/or Indicators Inoperative

2. Left Turn Signals Malfunction

3. Right Turn Signals Malfunction

4. Left Front Turn Signal Malfunction

5. Right Front Turn Signal Malfunction

6. Left Rear Turn Signal Malfunction

7. Right Rear Turn Signal Malfunction

8. Left Repeater Lamp Malfunction

9. Right Repeater Lamp Malfunction
 

Circuit/System Description

Ground is applied at all times to the turn signal/multi-function switch. The turn signal lamps may only be activated with the ignition switch in the ON or START position. When the turn signal/multi-function switch is placed in either the TURN RIGHT or TURN LEFT position, ground is applied to the body control module through either the right turn or left turn signal switch signal circuit. The BCM then applies a pulsating voltage to the front and rear turn signal lamps through there respective voltage supply circuits. When a turn signal request is received by the BCM, a serial data message is sent to the instrument cluster requesting the respective turn signal indicator be pulsed ON and OFF.

Reference Information


Schematic Reference

Exterior Lights Schematics


Connector End View Reference

Component Connector End Views


Description and Operation

Exterior Lighting Systems Description and Operation


Electrical Information Reference


Scan Tool Reference

Control Module References for scan tool information

Circuit/System Verification

Ignition ON, observe the scan tool Right Turn Signal Switch parameter and Left Turn Signal Switch parameter while cycling the S78 Turn Signal/Multifunction Switch between the left and right positions. The readings should toggle between ACTIVE and INACTIVE.

If the readings do not change between the commanded states, refer to Turn Signal Switch Malfunction. If the readings change between the commanded states and the instrument cluster turn signal indicators are inoperative, refer to Turn Signal Indicators Malfunction.

Circuit/System Testing

Turn Signal Switch Malfunction

1. Ignition OFF, disconnect the harness connector at the S78 Turn Signal/Multifunction Switch.
2. Verify that a test lamp illuminates between B+ and the ground circuit terminal 3.
⇒ If the test lamp does not illuminate, test the ground circuit for an open/high resistance.
3. Ignition ON, verify the scan tool Left Turn Signal Switch parameter is INACTIVE.
⇒ If not the specified value, test the signal circuit terminal 1 for a short to ground. If the circuit tests normal, replace the K9 Body Control Module.
4. Verify the scan tool Right Turn Signal Switch parameter is INACTIVE.
⇒ If not the specified value, test the signal circuit terminal 7 for a short to ground. If the circuit tests normal, replace the K9 Body Control Module.
5. Install a 3 A fused jumper wire between the signal circuit terminal 1 and ground. Verify the scan tool Left Turn Signal Switch parameter is ACTIVE.
⇒ If not the specified value, test the signal circuit for a short to voltage or an open/high resistance. If the circuit tests normal, replace the K9 Body Control Module.
6. Install a 3 A fused jumper wire between the signal circuit terminal 7 and ground. Verify the scan tool Right Turn Signal Switch parameter is ACTIVE.
⇒ If not the specified value, test the signal circuit for a short to voltage or an open/high resistance. If the circuit tests normal, replace the K9 Body Control Module.
7. If all circuits test normal, test or replace the S78 Turn Signal/Multifunction Switch.

Turn Signal Lamps Malfunction

1. Ignition OFF, disconnect the harness connector at the inoperative turn signal lamp.
2. Disconnect the negative terminal of the C1 Battery.
3. Test for less than 5.0 Ω between the appropriate ground circuit terminal listed below and ground.
  •  E4RF Turn Signal Lamp - Right Front ground circuit harness connector terminal B
  •  E4Z Turn Signal Repeater Lamp - Right ground circuit harness connector terminal 1
  •  E4LF Turn Signal Lamp - Left Front ground circuit harness connector terminal B
  •  E4Y Turn Signal Repeater Lamp - Left ground circuit harness connector terminal 1
  •  E42R Tail Lamp Assembly - Right ground circuit harness connector terminal C
  •  E42L Tail Lamp Assembly - Left ground circuit harness connector terminal B
⇒ If greater than the specified range, test the ground circuit for an open/high resistance.
4. Reconnect the negative terminal of the C1 Battery.
5. Connect a test lamp between the appropriate control circuit terminal listed below and ground.
  •  E4RF Turn Signal Lamp - Right Front circuit harness connector terminal A
  •  E4Z Turn Signal Repeater Lamp - Right circuit harness connector terminal 2
  •  E4LF Turn Signal Lamp - Left Front circuit harness connector terminal A
  •  E4Y Turn Signal Repeater Lamp - Left circuit harness connector terminal 2
  •  E42R Tail Lamp Assembly - Right Turn Signal Lamp circuit harness connector terminal B
  •  E42L Tail Lamp Assembly - Left Turn Signal Lamp circuit harness connector terminal C
6. Command the appropriate Turn Signal Lamp ON and OFF with a scan tool. The test lamp should turn ON and OFF when changing between the commanded states.
⇒ If the test lamp is always ON, test the control circuit for a short to voltage. If the circuit tests normal, replace the K9 Body Control Module.
⇒ If the test lamp is always OFF, test the control circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the K9 Body Control Module.
7. If all circuits test normal, replace the appropriate turn signal lamp assembly.

Turn Signal Indicators Malfunction

Ignition ON, command the All Indicators test ON and OFF with the scan tool, verify both turn signal indicators changes between turn ON and OFF.

If both turn signal indicators changes between illuminate and not illuminate during the test, replace the K9 Body Control Module. If one or both turn signal indicators do not illuminate during the test or remain illuminated at all times, replace the P16 Instrument Cluster.

Component Testing

Turn Signal Switch

1. Ignition OFF, disconnect the harness connector at the S78 Turn Signal/Multifunction Switch.
2. Test for infinite resistance between the signal circuit terminal 1 and the ground terminal 3.
⇒ If less than the specified value, replace the S78 Turn Signal/Multifunction Switch.
3. Push the signal/multifunction switch in the turn left position, test for less than 5 Ω between signal terminal 1 and ground terminal 3.
⇒ If greater than the specified value, replace the S78 Turn Signal/Multifunction Switch.
4. Test for infinite resistance between the signal circuit terminal 7 and the ground terminal 3.
⇒ If less than the specified value, replace the S78 Turn Signal/Multifunction Switch.
5. Push the signal/multifunction switch in the turn right position, test for less than 5 Ω between signal terminal 7 and ground terminal 3.
⇒ If greater than the specified value, replace the S78 Turn Signal/Multifunction Switch.

Repair Instructions

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

•  Control Module References for BCM or instrument cluster replacement, setup, and programming

DTC B258A > < Stop Lamps Malfunction