66891, E6891 and D6891

Fault Symptom.
Permanent: 66891
Intermittent:

Conditions
Solar sensor, component fault.

Fault Symptom.
Permanent: E6891*
Intermittent: D6891*

Conditions
Solar sensor communications fault. This fault can be caused by open circuit, short circuit to ground or short circuit to 12 V (pin 18).

* D6891. For additional information refer to "Wiring Harness, Adapting".
Service and Repair








Solar Sensor - Testing

* NOTE: There is a chance that this diagnostic trouble code may have been generated erroneously. Start by erasing the diagnostic trouble code using the ISAT scan tool and start the car. If the diagnostic trouble code is again generated, proceed with fault diagnosis. If it is gone, no further action is required.

ISAT scan tool command: 380

Display shows:
Type of solar sensor, standard or Australian.

Action

NOTE: Selecting "INFO" on the DCC when the ignition is switched OFF starts the ACC. However, the solar sensor is not activated and fault code E6891/D6891 (communications fault in solar sensor) is therefore generated.

1. Unplug the solar sensor connector and check ground on pin 4 and +54 supply to pin 1. If readings are incorrect, check the circuit. If there is no fault, refit the connector, erase all diagnostic trouble codes and restart the system.

2. If the fault is still present: Unplug the solar sensor connector and the ACC control module's 39 pin connector. Check if there is an open circuit between pin 2 in the solar sensor connector and pin 18 in the ACC control module's connector. If there is no fault, refit connectors, erase all diagnostic trouble codes and restart the system.

3. If the fault is still present, try with a new solar sensor and restart the system.

4. If the fault still remains, refit the old solar sensor and try with a new ACC control module.