Engine Control - Driveability Diagnosis Information
303-43DATE 04/01
V8 XJ Series/XK
MODEL
1997-98 MY XK8 Range
1998 MY V8 XJ Series VIN 1998-99 MY XJR
Drivability Diagnosis - AJ 26 Engines
Issue:
This Technical Bulletin has been issued to give diagnostic information relating to various engine drivability concerns. Driven by the symptoms that the customer experiences, the guide takes you through the faultfinding process in a logical order.
Note:
Diagnostic guides covering over engine concerns will follow.
Action:
Before using the guide, check the symptom Matrix shown for the diagnostic flowchart sequence. For example, if the engine cuts-out soon after start, work through flow charts P3, P2, P1, P5 etc.. Following the flowcharts in the sequence identified will help rectify any concerns while optimizing the utilization of workshop time.
Note:
When working on any vehicle ensure that exposed paintwork is protected with the appropriate fender protection covers.
RELAY CODES AND DATE STAMPS
SYMPTOM MATRIX
P1 - CONTAMINATED THROTTLE DIAGNOSTIC FLOW CHART
P2 - ECM RELAY DIAGNOSTIC FLOW CHART
P3 - FUEL PUMP RELAY DIAGNOSTIC FLOW CHART
P4 - IMMOBILIZATION (STALL SITUATION) DIAGNOSTIC FLOW CHART
P4 - IMMOBILIZATION (STALL SITUATION) DIAGNOSTIC FLOW CHART - IGNITION INPUTS
P5 - DTC 1336 DIAGNOSTIC FLOW CHART
P5 - DTC 1336 - ADDITIONAL INFORMATION
P14 - ENGINE HARNESS DIAGNOSTIC FLOW CHART
P17 - FUEL PUMP DIAGNOSTIC FLOW CHART
P18 - ENGINE COOLANT TEMPERATURE SENSOR DIAGNOSTIC FLOW CHART
P18 - ENGINE COOLANT TEMPERATURE SENSOR - RESISTANCE VALUES
P19 - MASS AIR FLOW SENSOR DIAGNOSTIC FLOW CHART
P20 - FUEL PRESSURE REGULATOR DIAGNOSTIC FLOW CHART
P21 - FUEL LINES DIAGNOSTIC FLOW CHART
P23 - AIR LEAKAGE DIAGNOSTIC FLOW CHART
P29 - BLOCKED PART LOAD BREATHER CLEANING PROCEDURE
PDU EXPLANATION FLOW CHART GUIDED - DIAGNOSTICS
PDU EXPLANATION FLOW CHART - TOOLBOX
PDU EXPLANATION FLOW CHART - MULTIMETER