DTC 85

Diagnostic Chart:

Wiring Diagram:

The brake switch is normally closed supplying 12 volts to the PCM at terminal J3E05 when the key is on and brake off.

INFORMATION FLAG PARAMETERS

Info. Flag 85 is set when the PCM has detected the following conditions twice per ignition cycle.

^ Vehicle has cycled 5 times from 0-55 Km/h (0-35 mph).

^ Voltage at PCM terminal J3E1 (Circuit 86) is always 12 volts.



TEST DESCRIPTION

Numbered steps below refer to steps on trouble chart.

1. When disconnecting the brake switch connector, the PCM/TC should see 0 volts at terminal J3E5. 0 volts should be indicated as brake switch OFF.

2. If the Scan tool indicate is ON when the brake switch was disconnected, it indicates a short to voltage on Circuit 86 to PCM.


DIAGNOSTIC AIDS

When attempting to diagnose an intermittent problem use the Scan tool* to review supplemental diagnostic information. The supplemental data can be used to duplicate a problem.

* Select MALF History from Scan tool TCM menu.


Check the tightness of the female terminal grip with a spare male terminal.