Pinpoint Test F: The Speedometer/Odometer Is Inoperative

Instrumentation, Message Center and Warning Chimes

Pinpoint Tests

Pinpoint Test F: The Speedometer/Odometer Is Inoperative

Normal Operation

The Instrument Cluster (IC) receives the vehicle speed date from the PCM over the communication network. The PCM receives the Vehicle Speed Sensor (VSS) information from the Output Shaft Speed (OSS) sensor. The IC monitors the vehicle speed input from the PCM and commands the speedometer with a corresponding movement of the pointer. The odometer is tamper resistant and accumulates and registers up to one million kilometers in metric mode or one million miles in English mode, based upon rolling count data sent from the PCM over the communication network.

This pinpoint test is intended to diagnose the following:

- PCM
- IC



PINPOINT TEST F: THE SPEEDOMETER/ODOMETER IS INOPERATIVE

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F1 RETRIEVE THE RECORDED DTCs FROM THE PCM KOEO SELF-TEST


- Check for recorded PCM DTCs from the Key ON Engine OFF (KOEO) self-test.
- Are any DTCs recorded?

Yes
REFER to Computers and Control Systems Information to continue diagnosis of the DTCs.

No
GO to F2.

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F2 RETRIEVE THE RECORDED DTCs FROM THE IC SELF-TEST


- Check for recorded continuous memory IC DTCs.
- Is DTC U1900 recorded?

Yes
REFER to Information Bus.

No
If the speedometer is inoperative, GO to F3.

If the odometer is inoperative, GO to F5.

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F3 CARRY OUT THE IC SPEEDOMETER ACTIVE COMMAND USING THE SCAN TOOL


- Ignition ON.
- Enter the following diagnostic mode on the scan tool: IC DataLogger.
- Select the IC speedometer (SPDOMETER) active command. Command the speedometer on. Observe the speedometer.
- Does the speedometer begin at 0 km/h (0 mph) and move to 193 km/h (120 mph)?

Yes
GO to F4.

No
INSTALL a new IC. REFER to Instrument Cluster (IC) Instrument Cluster (IC). TEST the system for normal operation.

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F4 CHECK THE PCM VSS PIDs


NOTE: This step may require the use of an assistant to monitor and record the scan tool data.

- Enter the following diagnostic mode on the scan tool: PCM DataLogger.
- NOTE: The speedometer should register approximately the same speed as the VSS PID ± 8 km/h (5 mph).
- Monitor the PCM vehicle speed PID (VSS) while driving the vehicle at 32 km/h (20 mph), 64 km/h (40 mph) and 97 km/h (60 mph).
- Does the PID indicate vehicle speed?

Yes
INSTALL a new IC. REFER to Instrument Cluster (IC) Instrument Cluster (IC). TEST the system for normal operation.

No
INSTALL a new PCM. REFER to Computers and Control Systems Information. TEST the system for normal operation.

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F5 MONITOR THE DISPLAY SEGMENT CONTROL DISPLAY


- Enter the following diagnostic mode on the scan tool: IC DataLogger.
- Select the display segment control (SEGMENTS_2) active command. Command the display segment active command on.
- Do the display segments illuminate correctly?

Yes
INSTALL a new PCM. REFER to Computers and Control Systems Information. TEST the system for normal operation.

No
INSTALL a new IC. REFER to Instrument Cluster (IC) Instrument Cluster (IC). TEST the system for normal operation.

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