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DTC Troubleshooting

DTC TROUBLESHOOTING CHART

Step Action Value(s) Yes No
1 Was the Diagnostic Circuit Check completed? - Go to Step 3 Go to Step 2
2 Perform the DIAGNOSTIC CIRCUIT CHECK  prior to performing this trouble tree.
Did you find problem?		 - Go to Step 3 System OK
3
  1. Ignition switch "OFF".
  2. Inspect the right front wheel speed sensor and jumper harness for other physical damage.

Is any physical damage noted?		 - Go to Step 4 Go to Step 5
4 Repair the damage to the right front wheel speed sensor, jumper harness.
Is the repair completed?		 - System OK -
5 Was DTC C1203 set as a current or history code? - Go to Step 6 Go to Step 7
6 Perform diagnostics for DTC C1203  prior to performing this table. - System OK -
7
  1. Connect a Scan Tool and select data list.
  2. Monitor the wheel speed sensors.
  3. Test-drives vehicle above 24 kph (15 mph) and slowly decelerates to 0, do this several times.

Did C1205 reset or did the right front wheel speed suddenly drop to 0 prior to the vehicle coming to a complete stop?		 - Go to Step 9 Go to Step 8
8 DTC C1205 is intermittent. Refer to DIAGNOSTIC AIDS . - System OK -
9
  1. Ignition switch "OFF".
  2. Raise and suitably support the vehicle.
  3. Disconnect the EBCM harness from the EBCM.
  4. Connect a voltmeter to EBCM harness terminals 1 and 2.
  5. Select the AC milli-volt scale.
  6. Spin the right front wheel while observing the voltmeter. (voltage should increase as wheel speed increases)

Is the AC voltage within the specified range?		 At least 100 mV Go to Step 10 Go to Step 11
10 Replace the EBCM - System OK -
11
  1. Disconnect the left front jumper harness from the right front wheel speed sensor.
  2. Connect an ohmmeter to terminals 2 and 1 of the right front wheel speed sensor.

Is the resistance within the specified range?		 800 - 1,600 Ω (Resistance will vary with temperature) Go to Step 13 Go to Step 12
12 Replace the right front wheel speed sensor. - System OK -
13
  1. Right front jumper harness still disconnected from the right front speed sensor.
  2. Connect a voltmeter to terminals 2 and 1 of the left front wheel speed sensor.
  3. Select the AC milli-volt scale.
  4. Spin the right front wheel while observing the voltmeter. (voltage should increase as wheel speed increases)

Is the AC voltage within the specified range?		 At least 100 mV Go to Step 14 Go to Step 12
14
  1. Disconnect the right front jumper harness from the wheel speed sensor.
  2. EBCM harness still disconnected from the EBCM.
  3. Connect an ohmmeter to EBCM harness terminals 1 and 2.

Is the Resistance within the specified range?		 OL (open circuit) Go to Step 16 Go to Step 15
15 Find and repair the short between the 2 circuits. - System OK -
16
  1. EBCM harness still disconnected from the EBCM.
  2. Right front jumper harness still disconnected from the wheel speed sensor.
  3. Connect an ohmmeter to EBCM harness terminal 1 and then to the wheel speed sensor terminal 1.

Is the resistance within the specified range?		 Less than 2 Ω Go to Step 18 Go to Step 17
17 Repair the open or high resistance between terminals 1 and 1. - System OK -
18
  1. EBCM harness still disconnected from the EBCM.
  2. Right front jumper harness still disconnected from the wheel speed sensor.
  3. Connect an ohmmeter to EBCM harness terminal 2 and then to the wheel speed sensor terminal 2.

Is the resistance within the specified range?		 Less than 2 Ω Go to Step 20 Go to Step 19
19 Repair the open or high resistance between terminal 2 and 2. - System OK -
20
  1. Replace the right front wheel speed jumper harness
  2. Test-drive the vehicle at various speeds and road surfaces.

Did C1205 reset?		 - Go to Step 10 System OK
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