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Home >> Isuzu >> 2007 >> Ascender RWD >> Repair and Diagnosis >> Brakes >> Antilock Brake System, Traction Control System & Stability Control System >> Diagnostic Information and Procedures >> DTC C0186 >> Test Description

Test Description

The numbers below refer to the step numbers on the diagnostic table.

  1. 3:  This step tests the sensor 5-volt reference circuitry and ground circuit.
  2. 4:  This step tests the sensor signal circuit for an open or high resistance.
DTC C0186

Step Action Values Yes No
IMPORTANT: If DTC C0292 is set, diagnose C0292 before proceeding with diagnostics for C0186.
If DTC C0196 is set, diagnose C0196 before proceeding with diagnostics for C0186.
Always use connector test adapters when performing tests to avoid damage to delicate connector terminals.
Do not turn OFF the ignition during this diagnostic procedure unless the step in the table instructs you to do so. The scan tool may display some incorrect data if the ignition is cycled.
Schematic Reference: Antilock Brake System Schematics Connector End View Reference: Antilock Brake System Connector End Views 
1 Did you perform the ABS Diagnostic System Check - Vehicle? - Go to Step 2  Go to Diagnostic System Check - Vehicle
2
  1. Use the scan tool to clear the DTCs.
  2. Turn OFF the ignition for 5 seconds.
  3. Turn ON the ignition.
  4. Operate the vehicle within the Conditions for Running the DTC as specified in the supporting text.
Does the DTC reset?		 - Go to Step 3  Go to Diagnostic Aids 
3 
  1. Turn ON the ignition switch.
  2. Use a DMM to measure the voltage between the lateral accelerometer 5-volt reference circuit and the lateral accelerometer low reference circuit.
Does the voltage measure greater than the specified value?		 4.75 V Go to Step 5  Go to Step 4 
4  Test the lateral accelerometer signal circuit for the following conditions:
  • An open
  • A high resistance
  • A short to ground

Refer to Circuit Testing and Wiring Repairs .
Did you find and correct the condition?		 - Go to Step 9  Go to Step 6 
5
  1. Inspect for poor connections at the harness connector of the yaw rate sensor/lateral accelerometer. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs .
  2. Ensure the yaw rate sensor/lateral accelerometer is mounted securely and that the mounting bracket is not bent or otherwise damaged.
Did you find and correct the condition?		 - Go to Step 9  Go to Step 7 
6 Inspect for poor connections at the harness connector of the electronic brake control module (EBCM). Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs .
Did you find and correct the condition?		 - Go to Step 9  Go to Step 8 
7
IMPORTANT: Replace the lateral accelerometer/yaw rate sensor. Use the scan tool to perform a Yaw Rate Sensor Recalibration procedure.
Replace the yaw rate sensor/lateral accelerometer. Refer to Control Module References .Did you complete the replacement?		 - Go to Step 9  -
8
IMPORTANT: Following EBCM replacement, perform the set-up procedure for the EBCM. Use the scan tool to perform the Tire Size Calibration procedure.
Replace the EBCM. Refer to Control Module References .Did you complete the replacement?		 - Go to Step 9  -
9
  1. Use the scan tool Clear serial data DTCs function to clear all of the DTCs from all modules.
  2. Turn OFF the ignition for 5 seconds.
  3. Turn ON the ignition.
  4. Operate the vehicle within the Conditions for Running the DTC as specified in the supporting text.
Does the DTC reset?		 - Go to Step 3  System OK
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