For 1990-2009 cars

Step | Action | Value(s) | Yes | No
--- | --- | --- | --- | ---
DEFINITION: Brake pad wear warning indicator is illuminated at all times and the front disc brake linings are OK.
1 | Did you verify that the front disc brake linings are OK? | -- | Go to Step 2 | Go to Brake Pad Inspection in Disc Brakes
2 |

1. Disconnect the RH brake pad wear sensor connector.
2. Turn ON the ignition, with the engine OFF.
3. Measure the voltage from terminal 2 of the RH brake pad wear sensor harness connector and terminal 3 of the RH brake pad wear sensor harness connector.

Does the voltage measure near the specified value?

12 V

Go to Step 3

Go to Step 4

3 | Measure the resistance of the RH brake pad wear sensor. Refer to Testing for Continuity in Wiring Systems. Does the resistance measure less than the specified value? | .5 ohms | Go to Step 5 | Go to Step 6
4 |

1. Turn OFF the ignition.
2. Measure the resistance from terminal 3 of the RH brake pad wear sensor harness connector and a good ground. Refer to Circuit Testing in Wiring Systems.

Does the resistance measure less than the specified value?

.5 ohms

Go to Step 7

Go to Step 8

5 | Inspect for poor connections at the gauge cluster connector. Refer to Testing for Intermittent Conditions and Poor Connections in Wiring Systems. Did you find and correct the condition? | -- | Go to Step 9 | Go to Step 10
6 | Replace the RH brake pad wear sensor. Did you complete the replacement? | -- | Go to Step 9 | --
7 |

1. Disconnect the LH brake pad wear sensor.
2. Measure the resistance of the LH brake pad wear sensor. Refer to Testing for Continuity in Wiring Systems.

Does the resistance measure less than the specified value?

.5 ohms

Go to Step 11

Go to Step 12

8 | Repair the open in the ground circuit. Refer to Wiring Repairs in Wiring Systems. Did you complete the repair? | -- | Go to Step 9 | --
9 | Verify brake pad wear indicator operation:

1. Reconnect all connectors and components previously removed.
2. Turn ON the ignition, with the engine OFF.
3. Disconnect one of the brake pad wear sensor connectors.
4. Observe the brake pad wear indicator lamp on the gauge cluster.

Does the indicator lamp illuminate?

--

System OK

--

10 | Replace the gauge cluster. Did you complete the replacement? | -- | Go to Step 9 | --
11 |

1. Turn ON the ignition, with the engine OFF.
2. Measure the voltage from terminal 2 of the LH brake pad wear sensor harness connector and a good ground.

Does the voltage measure near the specified value?

12 V

Go to Step 13

Go to Step 14

12 | Replace the LH brake pad wear sensor. Did you complete the replacement? | -- | Go to Step 9 | --
13 | Test the circuit between the LH brake pad wear sensor harness connector terminal 3 and the RH brake pad wear sensor harness connector terminal 2 for an open. Refer to Testing for Continuity in Wiring Systems. Did you find and correct the condition? | -- | Go to Step 9 | Go to Step 15
14 | Test the circuit between terminal 2 of the LH brake pad wear sensor harness connector and the gauge cluster connector terminal 2 for an open. Refer to Testing for Continuity in Wiring Systems. Did you find and correct the condition? | -- | Go to Step 9 | Go to Step 15
15 | Refer to Inducing Intermittent Fault Conditions in Wiring Systems. Did you find and correct the condition? | -- | Go to Step 9 | --