Good day guys, so I have a GMC W4500, 4HE1 engine, its pretty similiar to the Isuzu NPR, im getting a flash code 19 thats giving me some headache. Anyone with any advice or solutions to help with this problem, would really appreciate it.
|Diagnosis Based on Diagnostic Trouble Code (DTC)|
|DTC 19 ABS Operation Signal (Wire Breaking/Short Circuit)|
|Explanation of Circuit: When the signal from Electronic Brake Control Module (EBCM) is supplied to the Transmission Control Module (TCM) the TCM judges the operating condition of the ABS.|
The ABS operation signal is output from the EBCM to the TCM, the TCM inhibits the coast lock-up control.
Explanation of Test: The following numbers correspond to the numbers enclosed with a circle in the diagnosis chart.
(1) When the ABS is INACTIVE, the voltage between the TCM terminal (B230-11) and ground (B231-2 or B231-8) is 10 to 16V.
(2) When the exhaust brake cut relay is removed, the TCM terminal (B230-11) and ground (B231-2 or B231-8) is 0V.
Diagnostic Aids: A temporary failure may be caused by faulty connection, worn-away wire insulator or internal wire breaking of insulator.
Check if any of the following conditions is provided in the EBCM and TCM harness connector: Terminal positional shift, improper junction, lock damage, improper terminal shape or damage, faulty wire connection of terminal, and harness damage.
TCM Voltage Check: Refer to pages 7A2.