Pinpoint Test Ac: The Trip Computer Switch Is Inoperative

AC1 PERFORM THE IPC (INSTRUMENT PANEL CLUSTER) SELF-TEST
- Using a diagnostic scan tool, perform the IPC self-test.
Are any Diagnostic Trouble Codes (DTCs) recorded?
- Yes : For DTC B10BD:01, GO to AC6
  For all other Diagnostic Trouble Codes (DTCs), REFER to DTC CHART: IPC .
- No : GO to AC2
AC2 CHECK THE MESSAGE CENTER INPUT TO THE IPC (INSTRUMENT PANEL CLUSTER)
- Using a diagnostic scan tool, view the IPC Parameter Identifications (PIDs).
- Select the IPC message center switch (INT_TRIP_SW) PID .
- Monitor the IPC PID while pressing and releasing the trip computer switch.
Does the IPC PID match the trip computer switch position?
- Yes : INSTALL a new IPC .
  REFER to: INSTRUMENT PANEL CLUSTER (IPC) .
- No : GO to AC3

AC3 CHECK THE TRIP COMPUTER SIGNAL CIRCUIT FOR A SHORT TO VOLTAGE

Ignition OFF.
Disconnect IPC C220A .
Ignition ON.

Measure:

Positive Lead	Measurement/Action	Negative Lead
C220A-30		Ground

Is any voltage present?

Yes : REPAIR the circuit.
No : GO to AC4

AC4 CHECK THE TRIP COMPUTER SIGNAL CIRCUIT FOR AN OPEN

Ignition OFF.
Disconnect Multifunction Switch C202 .

Measure:

Positive Lead	Measurement/Action	Negative Lead
C220A-30		C202-3

Is the resistance less than 3 ohms?

Yes : GO to AC5
No : REPAIR the circuit.

AC5 CHECK THE TRIP COMPUTER SWITCH INPUT TO THE IPC (INSTRUMENT PANEL CLUSTER)

Connect Multifunction Switch C202 .

While pressing and releasing the trip computer switch, measure:

Positive Lead	Measurement/Action	Negative Lead
C220A-30		Ground

Is the resistance less than 5 ohms with the trip computer switch button pressed and greater than 10, 000 ohms with the trip computer switch button released?

Yes : GO to AC7
No : INSTALL a new trip computer switch (part of the LH multifunction switch).
REFER to: STEERING COLUMN MULTIFUNCTION SWITCH LH .

AC6 CHECK THE TRIP COMPUTER SIGNAL CIRCUIT FOR A SHORT TO GROUND

Ignition OFF.
Disconnect Multifunction Switch C202 .

Measure:

Positive Lead	Measurement/Action	Negative Lead
C220A-30		Ground

Is the resistance greater than 10, 000 ohms?

Yes : GO to AC7
No : REPAIR the circuit.

AC7 CHECK FOR CORRECT IPC (INSTRUMENT PANEL CLUSTER) OPERATION
- Ignition OFF.
- Disconnect and inspect the IPC connectors.
- Repair:
  - corrosion (install new connector or terminals - clean module pins)
  - damaged or bent pins - install new terminals/pins
  - pushed-out pins - install new pins as necessary
- Reconnect the IPC connectors. Make sure they seat and latch correctly.
- Operate the system and determine if the concern is still present.
Is the concern still present?
- Yes : CHECK OASIS for any applicable Technical Service Bulletins (TSBs). If a TSB exists for this concern, DISCONTINUE this test and FOLLOW TSB instructions. If no Technical Service Bulletins (TSBs) address this concern, INSTALL a new IPC .
  REFER to: INSTRUMENT PANEL CLUSTER (IPC) .
- No : The system is operating correctly at this time. The concern may have been caused by module connections. ADDRESS the root cause of any connector or pin issues.