Pinpoint Test I: DTC U0126:00

Cruise Control

Pinpoint Tests

Pinpoint Test I: DTC U0126:00

Normal Operation
- DTC U0126:00 (Lost Communication With Steering Angle Sensor Module: No Sub-Type Information) - sets in the Cruise-Control Module (C-CM) if data messages received from the Power Steering Control Module (PSCM) (part of the steering gear (Gasoline Turbocharged Direct Injection (GTDI)) or ABS module (non-GTDI)) over the High Speed Controller Area Network (HS-CAN) are missing. For a complete list of all network messages, refer to Information Bus.

This pinpoint test is intended to diagnose the following:

- PSCM
- C-CM



PINPOINT TEST I: DTC U0126:00

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I1 VERIFY THE CUSTOMER CONCERN


- Ignition ON.
- Verify that there is an observable symptom present.
- Is an observable symptom present?

Yes
GO to I2.

No
The system is operating normally at this time. The DTC may have been set due to high network traffic or an intermittent fault condition.

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I2 CHECK THE COMMUNICATION NETWORK


- Ignition ON.
- Enter the following diagnostic mode on the scan tool: Network Test.
- Carry out the network test.
- Does the PSCM GTDI or ABS module non-GTDI pass the network test?

Yes
GO to I3.

No
REFER to Information Bus, The PSCM or The ABS module Does Not Respond To The Scan Tool.

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I3 RETRIEVE THE RECORDED DTCs FROM THE C-CM SELF-TEST


- Check for recorded DTCs from the C-CM self-test.
- Is DTC U3003:16 or DTC U3003:17 recorded?

Yes
GO to Pinpoint Test Q (U3003:16) or GO to Pinpoint Test R (U3003:17). Pinpoint Test Q: DTC U3003:16 Pinpoint Test R: DTC U3003:17

No
GO to I4.

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I4 RECHECK THE C-CM DTCs


- Clear the DTCs. Repeat the C-CM self-test.
- Is DTC U0126:00 still present?

Yes
For GTDI engines, INSTALL a new PSCM (part of the steering gear).
REFER to Steering Gear - Electronic Power Assist Steering (EPAS) in Steering. CLEAR the DTCs. REPEAT the C-CM self-test.

For non-GTDI engines, INSTALL a new ABS module. REFER to Antilock Brakes / Traction Control Systems. CLEAR the DTCs. REPEAT the C-CM self-test.

If DTC U0126:00 is still present, INSTALL a new C-CM. REFER to Cruise-Control Module (C-CM) Service and Repair. TEST the system for normal operation.

No
The system is operating correctly at this time. The DTC may have been set due to high network traffic or an intermittent fault condition.

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