Tacoma

Toyota Tacoma 2015-2018 Brake Workshop Manual

Last Modified: 11-13-2015 6.6 C Doc ID: RM000005VB8000X
Model Year Start: 2016 Model: Tacoma Prod Date Range: [08/2015 - ]
Title: BRAKE CONTROL: VEHICLE STABILITY CONTROL SYSTEM (for Vacuum Brake Booster): C1437; Lost
Communication with ECM; 2016 MY Tacoma [08/2015 - ]
DTC C1437 Lost Communication with ECM
DESCRIPTION
The skid control ECU (brake actuator assembly) receives signals from the ECM via the CAN communication
system.
DTC
NO.
DETECTION ITEM DTC DETECTION CONDITION TROUBLE AREA
C1437
Lost
Communication
with ECM
When voltage at terminal +BS is 10 to 17.4 V
and vehicle speed is 15 km/h (9 mph) or more,
data cannot be sent to ECM continuously for 2
seconds or more.
CAN communication
system (skid control
ECU to ECM)
Skid control ECU (brake
actuator assembly)
ECM
INSPECTION PROCEDURE
NOTICE:
W
hen replacing the skid control ECU (brake actuator assembly), perform zero point calibration and store
system information
.
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 .
ABS/VSC/TRAC
TESTER DISPLAY MEASUREMENT ITEM RANGE NORMAL
CONDITION
DIAGNOSTIC NOTE
EFI Communication
Open
EFI communication open
detection
Normal or
Error
Normal
Error: Momentary
interruption
EFI Communication
Invalid
ECM communication invalid
detection
Normal or
Error
Normal Error: Invalid
HINT:
P
erform the above inspection before removing the sensor and connector.
cardiagn.com

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