Traction Control/Stability Control Indicator Malfunction
Diagnostic Instructions
Diagnostic Fault Information
Circuit
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Short to Ground
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Open/High Resistance
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Short to Voltage
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Signal Performance
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Traction Control Switch Signal
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B2745 02
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1
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1
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--
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Traction Control Switch Ground
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--
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1
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--
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--
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1. Traction Control Switch Inoperative.
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Circuit/System Description
The instrument cluster illuminates the traction
control/stability control-active indicator and stability control
off indicator for 5 s after ignition ON. The electronic brake
control module (EBCM) will request the instrument cluster via
serial data to turn the traction control/stability control-active
indicator ON (flashing) when the system is in traction control or
stability control mode. When the EBCM detects a fault it sends a
serial data message to the instrument cluster commanding the
traction control/stability control-active indicator ON.
The body control module (BCM) monitors the traction control
switch. When the traction control switch is pressed once, the BCM
will request the EBCM via serial data to disable the traction
control. When the traction control switch is pressed for 5 s,
the BCM will request the EBCM to disable the stability control. The
EBCM will request the instrument cluster via serial data to turn
the stability control off indicator ON to notify the driver of the
deactivation.
Reference Information
Schematic Reference
Antilock Brake System Schematics
Connector End View Reference
Component Connector End Views
Description and Operation
ABS Description and Operation
Electrical Information Reference
Scan Tool Reference
Control Module References for scan tool information
Circuit/System Verification
- Ignition ON, with a scan tool command the instrument
cluster All Indicators test ON and OFF. Verify the traction
control/stability control-active indicator and stability control
off indicator turn ON and OFF.
⇒ |
If either indicator does not turn ON and OFF,
replace the P16 Instrument Cluster. |
- Observe the scan tool BCM Traction Control Switch
parameter while pressing and releasing the S48C Multifunction
Switch 1 - Instrument Panel. Verify the reading changes between
Active and Inactive.
⇒ |
If the parameter does not change between the
specified values, refer to Circuit/System Testing. |
- Observe the scan tool EBCM Traction Control System
parameter while pressing and releasing the S48C Multifunction
Switch 1 - Instrument Panel. Verify the reading changes between On
and Off.
⇒ |
If the parameter does not change between the
specified values, replace the K9 Body Control Module. |
- Observe the stability control off indicator while
pressing the traction control switch and releasing. Verify the
stability control off indicator turns ON and OFF.
⇒ |
If the stability control off indicator does not
turn ON and OFF, replace the K17 Electronic Brake Control
Module. |
Circuit/System Testing
Note: Circuit/System
Verification must be performed before Circuit/System
Testing.
- Ignition OFF, key out, open and close the driver door,
wait 30 s, disconnect the harness connector at the
S48C Multifunction Switch 1 - Instrument Panel.
- Test for less than 10 Ω between the ground
circuit terminal 2 and ground.
⇒ |
If greater than the specified value, test the
ground circuit for an open/high resistance. |
- Ignition ON, verify the scan tool BCM Traction Control
Switch parameter is Inactive.
⇒ |
If not the specified value, test the signal
circuit for a short to ground. If the circuit tests normal, replace
the K9 Body Control Module. |
- Install a 3 A fused jumper wire between the
signal circuit terminal 4 and ground.
- Verify the scan tool BCM Traction Control 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. |
- If all circuits test normal, test or replace the
S48C Multifunction Switch 1 - Instrument Panel.
Component Testing
Static Test
- Ignition OFF, disconnect the harness connector at the
S48C Multifunction Switch 1 - Instrument Panel.
- Test for infinite resistance between the signal
circuit terminal 4 and the ground circuit terminal 2 with
the switch in the released position.
⇒ |
If less than the specified value, replace the
S48C Multifunction Switch 1 - Instrument Panel. |
- Test for less than 5 Ω between the signal circuit
terminal 4 and the ground circuit terminal 2 with the
switch in the pressed position.
⇒ |
If greater than the specified value, replace the
S48C Multifunction Switch 1 - Instrument Panel. |
Repair Instructions
Perform the
Diagnostic Repair Verification after completing the diagnostic
procedure.
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