Pinpoint Test F: The Speedometer Is Inoperative
Instrumentation, Message Center and Warning Chimes
Pinpoint Tests
Pinpoint Test F: The Speedometer Is Inoperative
Normal Operation
The Instrument Cluster (IC) receives the vehicle speed signal from the PCM over the High Speed Controller Area Network (HS-CAN) communication bus. The PCM receives the vehicle speed signal input from the Output Shaft Speed (OSS) sensor. The IC monitors the vehicle speed signal input from the PCM and commands the speedometer with a corresponding movement of the pointer.
If the vehicle speed data is missing or invalid for 5 seconds or less or if the IC receives invalid vehicle speed data for 5 seconds or less, the IC defaults the speedometer to the last setting, based upon the last known good vehicle speed message received.
NOTE: If DTC U0100 is set in the IC, other observable symptoms may be an inoperative tachometer, temperature gauge or odometer.
If the IC does not receive the vehicle speed data message from the PCM for more than 5 seconds, the IC sets DTC U0100 in continuous memory and defaults the speedometer to 0 km/h (0 mph).
If the vehicle speed data is deemed invalid by the IC for more than 5 seconds, the IC sets DTC U2197 and defaults the speedometer to 0 km/h (0 mph).
This pinpoint test is intended to diagnose the following:
- PCM
- IC
PINPOINT TEST F: THE SPEEDOMETER IS INOPERATIVE
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F1 RETRIEVE THE RECORDED DTCs FROM THE PCM KOEO SELF-TEST
- Check the recorded PCM DTCs from the Key ON Engine OFF (KOEO) self-test.
- Are any DTCs recorded?
Yes
REFER to Computers and Control Systems.
No
GO to F2.
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F2 CARRY OUT THE SPEEDOMETER ACTIVE COMMAND USING THE SCAN TOOL
- Ignition ON.
- Enter the following diagnostic mode on the scan tool: IC DataLogger.
- Select the IC speedometer (SPD_IND) active command. Command the speedometer on and off while monitoring the speedometer.
- Does the speed begin at 0 km/h (0 mph) move to 193 km/h (120 mph) and return to 0 km/h (0 mph)?
Yes
GO to F3.
No
INSTALL a new IC. REFER to Instrument Cluster (IC) Instrument Cluster (IC). TEST the system for normal operation.
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F3 RETRIEVE THE RECORDED DTCs FROM THE IC SELF-TEST
- Check for recorded IC DTCs from the self-test.
- Are any DTCs recorded?
Yes
For DTC U0100, GO to Pinpoint Test AP. Pinpoint Tests AP: DTC U0100
For all other DTCs, REFER to DTC Charts. Instrumentation, Message Center and Warning Chimes
No
INSTALL a new PCM. REFER to Computers and Control Systems. TEST the system for normal operation.
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