SFCC_NOV2020_36

TECHNICAL TOPICS
POWERTRAIN
18MY – Onward Discovery Sport, RR Evoque, Range
Rover PHEV, RR Sport PHEV, Velar, F PACE, F TYPE,
XE, XF, E PACE equipped with AJ20P4
AJ20P4 COOLANT PUMP
Customer Voice:
–
The engine fan runs excessively.
Technical Description:
–
–
Technician investigation finds DTC(s) P26CB-72, P2B61-73 which are both set when
the variable coolant pump shroud is slow to respond to a request to open or close.
The engine fan may run at high speed due to other requirements from the vehicle such
as HVAC.
Open (full
flow) – fully
unshrouded
Status:
–
–
–
These DTCs may be stored with the new software, but the revised calibration will react
differently due to the following changes in the calibration as of the release required in
N451 and H291.
– MIL Request Status: These DTCs do not set the Check Engine MIL in the new
calibration.
– Fan Request Status: The fan will no longer run at 100% duty cycle with these
DTCs set in the new calibration. The fans will only run at max duty cycle from a
PCM request if it detects the engine is at risk for overheat.
Diagnose any other relevant DTCs that may be stored. Use live data in Pathfinder to
monitor temperature sensor values for the engine.
DO NOT replace the coolant pump to resolve the DTC(s) listed as this may result in the
rejection or audit of warranty claims. Only replace the coolant pump hardware if there
is evidence that an overheat event has occurred as outlined in the TOPIx Workshop
Manual (WSM) DTC Helptext.
PRINTED COPIES ARE UNCONTROLLED
Closed (no
flow) – fully
shrouded
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