Pinpoint Tests: Overview

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06-09-18 Anti-Lock Brake System 06-09-18


DIAGNOSIS AND TESTING (Continued)


Pinpoint Tests Do not run any of the following Pinpoint Tests unless you are so instructed by Quick Test. Each Pinpoint Test assumes that a fault has been detected in the system with direction to enter a specific repair routine. Doing any Pinpoint Test without direction from Quick Test may produce incorrect results and replacement of non-defective components. Correct test results for Quick Test are dependent on the proper operation of related components/systems. It may be necessary to correct any defects in these areas before passing Quick Test. Refer to Section 06-00. Do not replace any parts unless the test results indicates they should be replaced. When more than one service code is received, always start service with the first code received. Do not measure voltage or resistance at the processor or connect any test lights to it, unless otherwise specified. Isolate both ends of a circuit, and turn key off whenever checking for shorts or continuity unless


Disconnect solenoids and switches from the harness before measuring for continuity, resistance, or energizing by way of 12-volt source. In using the Pinpoint Tests, follow each step in order, starting from the first step in the appropriate test. Follow each step until the fault is found. After completing any repairs to the ABS system, verify all components are properly reconnected and repeat the functional Quick Test (Retest).


BK Black N Natural
BL Blue O Orange
BR Brown PK Pink
DB Dark Blue P Purple
DG Dark Green R Red
GY Gray T Tan
GN Green W White
LB Light Blue Y Yellow
LG Light Green