Pinpoint Test G: The Speed Dependent Interval Mode Does Not Operate Correctly

Wipers and Washers

Pinpoint Tests

Pinpoint Test G: The Speed Dependent Interval Mode Does Not Operate Correctly

Normal Operation

The Smart Junction Box (SJB) receives vehicle speed information from the Instrument Cluster (IC) over the communication network. When any intermittent wiper mode is selected except INT 1, the SJB will gradually increase or decrease the delay between wipes based on vehicle speed.

The speed dependent feature is easiest to verify in the INT 2 position. With the vehicle at a standstill and the multifunction switch in the INT 2 position, the wipers should operate once every 10 seconds. As vehicle speed increases, the delay between wipes will gradually shorten. For example, by the time the vehicle reaches 100 km/h (62 mph), the wipers should operate every 5 seconds. Speed dependent operation is similar in INT 3, INT 4 and INT 5 modes.

This pinpoint test is intended to diagnose the following:
- IC
- SJB



PINPOINT TEST G: THE SPEED DEPENDENT INTERVAL MODE DOES NOT OPERATE CORRECTLY

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G1 CHECK FOR RELATED DTCs


- Carry out a self-test on the PCM, IC and SJB module.
- Are any DTCs present?

Yes
For PCM-related DTCs, REFER to Computers and Control Systems Information.

For IC-related DTCs, REFER to Instrument Panel, Gauges and Warning Indicators.

For SJB-related DTCs, REFER to the Smart Junction Box (SJB) DTC Chart. Diagnostic Trouble Code Tests and Associated Procedures

No
GO to G2.

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G2 CHECK SPEEDOMETER OPERATION


- Verify the speedometer operates correctly.
- Does the speedometer operate correctly?

Yes
GO to G3.

No
REFER to Instrument Panel, Gauges and Warning Indicators to diagnose the IC.

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G3 CHECK THE SJB VSS_GEM PID


- Enter the following diagnostic mode on the scan tool: SJB DataLogger.
- While driving the vehicle at various speeds while monitoring the SJB module VSS_GEM PID and comparing with what is observed on the speedometer.
- Does the VSS_GEM PID value agree with the observed speedometer readings?

Yes
INSTALL a new SJB. TEST the system for normal operation.

No
REFER to Information Bus to diagnose the IC communication fault.

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