BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS: VEHICLE STABILITY CONTROL SYSTEM: C1437: Lost Communication
with ECM
C1437 - Lost Communication with ECM
DESCRIPTION
The skid control ECU receives signals from the ECM via the CAN communication system.
WIRING DIAGRAM
INSPECTION PROCEDURE
NOTICE:
When replacing the brake actuator assembly, perform zero point calibration and store system information See: Brakes and
Traction Control/Antilock Brakes / Traction Control Systems/Testing and Inspection/Programming and Relearning.
PROCEDURE
1. CHECK HARNESS AND CONNECTOR (MOMENTARY INTERRUPTION)
(a) Using the Techstream, check for any momentary interruption in the wire harness and connector corresponding to the DTC See:
Brakes and Traction Control/Antilock Brakes / Traction Control Systems/Testing and Inspection/Component Tests and General
Diagnostics/Check for Intermittent Problems.
ABS/VSC/TRAC
OK:
There are no momentary interruptions.
HINT
Perform the above inspection before removing the sensor and connector.
NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR (SKID CONTROL ECU - ECM)
OK -- Continue to next step.
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