Section 38 (Electronic Engine Controls)
WARNING: This page is about a different car, the 1998 Jaguar XK8. However, it is still accessible from the selected car via links, so may be relevant.
- Specification
- Description & Operation
- Engine Sensors
- Electronic Engine Control
- Engine Control Module (ECM)
- Throttle Position (TP) Sensor
- Camshaft Position (CMP) Sensor
- Crankshaft Position (CKP) Sensor
- Engine Coolant Temperature (ECT) Sensor
- Intake Air Temperature (IAT) Sensor
- Knock Sensor (KS)
- Heated Oxygen Sensor (HO2S)
- Oxygen Sensor (O2S)
- Variable Valve Timing (VVT) Solenoid
- Mass Air Flow (MAF) Sensor
- Engine Harness Connectors
- Circuit Diagrams (extracts only)
- Diagnosis & Testing
- Inspection and Verification
- Visual Inspection Chart
- Driver Information Chart
- Default mode Definitions
- Diagnostic Trouble Code (DTC) Index
- Pinpoint Tests
- PINPOINT TEST G270236p1 : DTC P0101, P0102, P0103; MASS AIR FLOW (MAF) SENSOR RANGE/PERFORMANCE, HIGH/LOW VOLTAGE
- G270236t1 : CHECK THE MAF SENSOR SENSE CIRCUIT FOR HIGH RESISTANCE
- G270236t2 : CHECK THE MAF SENSOR SENSE CIRCUIT FOR SHORT TO HIGH VOLTAGE
- G270236t3 : CHECK THE MAF SENSOR SENSE CIRCUIT FOR SHORT TO GROUND
- G270236t4 : CHECK THE MAF SENSOR SUPPLY CIRCUIT VOLTAGE
- G270236t5 : CHECK THE MAF SENSOR SUPPLY CIRCUIT FOR HIGH RESISTANCE
- PINPOINT TEST G270236p2 : DTC P0111, P0112, P0113; INTAKE AIR TEMPERATURE (IAT) SENSOR RANGE/PERFORMANCE, HIGH/LOW VOLTAGE
- PINPOINT TEST G270236p3 : DTC P0116, P0117, P0118; ENGINE COOLANT TEMPERATURE (ECT) SENSOR RANGE/PERFORMANCE, HIGH/LOW VOLTAGE
- PINPOINT TEST G270236p4 : DTC P0121, P0122, P0123; THROTTLE POSITION (TP) SENSOR RANGE/PERFORMANCE, HIGH/LOW VOLTAGE
- PINPOINT TEST G270236p5 : DTC P0131, P0132, P0133; RIGHT-HAND H02S LOW/HIGH VOLTAGE, SLOW RESPONSE
- PINPOINT TEST G270236p6 : DTC P0133, P0135; RIGHT-HAND H02S HEATER CIRCUIT MALFUNCTION
- PINPOINT TEST G270236p7 : DTC P0137, P0138; RIGHT-HAND CATALYST MONITOR SENSOR LOW/HIGH VOLTAGE, NO ACTIVITY
- G270236t23 : CHECK THE CATALYST MONITOR SENSOR SENSE CIRCUIT FOR HIGH RESISTANCE
- G270236t24 : CHECK THE CATALYST MONITOR SENSOR SENSE CIRCUIT FOR SHORT TO HIGH VOLTAGE
- G270236t25 : CHECK THE CATALYST MONITOR SENSOR SENSE CIRCUIT FOR SHORT TO GROUND
- G270236t26 : CHECK THE CATALYST MONITOR SENSOR GROUND CIRCUIT FOR OPEN CIRCUIT
- PINPOINT TEST G270236p8 : DTC P0151, P0152, P0153; LEFT-HAND H02S LOW/HIGH VOLTAGE, SLOW RESPONSE
- PINPOINT TEST G270236p9 : DTC P0153, P0155; LEFT-HAND H02S HEATER CIRCUIT MALFUNCTION
- PINPOINT TEST G270236p10 : DTC P0157, P0158; LEFT-HAND CATALYST MONITOR SENSOR LOW/HIGH VOLTAGE, NO ACTIVITY
- G270236t35 : CHECK THE CATALYST MONITOR SENSOR SENSE CIRCUIT FOR HIGH RESISTANCE
- G270236t36 : CHECK THE CATALYST MONITOR SENSOR SENSE CIRCUIT FOR SHORT TO HIGH VOLTAGE
- G270236t37 : CHECK THE CATALYST MONITOR SENSOR SENSE CIRCUIT FOR SHORT TO GROUND
- G270236t38 : CHECK THE CATALYST MONITOR SENSOR GROUND CIRCUIT FOR OPEN CIRCUIT
- PINPOINT TEST G270236p11 : DTC P0222, P0223; THROTTLE POSITION (TP) SENSOR CIRCUIT 2 LOW VOLTAGE
- PINPOINT TEST G270236p12 : DTC P0327, P0328; RIGHT-HAND KNOCK SENSOR (KS) CIRCUIT OUT OF RANGE (LOW VOLTAGE)
- PINPOINT TEST G270236p13 : DTC P0332, P0333; LEFT-HAND KNOCK SENSOR (KS) CIRCUIT OUT OF RANGE (LOW VOLTAGE)
- PINPOINT TEST G270236p14 : DTC P0335; CRANKSHAFT POSITION (CKP) SENSOR CIRCUIT MALFUNCTION
- G270236t47 : CHECK THE CKP SENSOR FOR CORRECT INSTALLATION
- G270236t48 : CHECK THE CKP SENSOR FOR DEBRIS
- G270236t49 : CHECK THE CKP SENSOR SENSE CIRCUIT FOR HIGH RESISTANCE
- G270236t50 : CHECK THE CKP SENSOR SENSE CIRCUIT FOR SHORT TO HIGH VOLTAGE
- G270236t51 : CHECK THE CKP SENSOR SENSE CIRCUIT FOR SHORT TO GROUND
- PINPOINT TEST G270236p15 : DTC P0340; CAMSHAFT POSITION (CMP) SENSOR CIRCUIT MALFUNCTION
- G270236t52 : CHECK THE CMP SENSOR FOR CORRECT INSTALLATION
- G270236t53 : CHECK THE CMP SENSOR FOR FOREIGN DEBRIS
- G270236t54 : CHECK THE CMP SENSOR SENSE CIRCUIT FOR HIGH RESISTANCE
- G270236t55 : CHECK THE CMP SENSOR SENSE CIRCUIT FOR SHORT TO HIGH VOLTAGE
- G270236t56 : CHECK THE CMP SENSOR SENSE CIRCUIT FOR SHORT TO GROUND
- PINPOINT TEST G270236p16 : DTC P0560; VEHICLE VOLTAGE MALFUNCTION
- PINPOINT TEST G270236p17 : DTC P1112, P1113; INTAKE AIR TEMPERATURE (IAT) SENSOR #2 SENSE CIRCUIT HIGH/LOW VOLTAGE
- PINPOINT TEST G270236p18 : DTC P1121, P1122, P1123; ACCELERATOR PEDAL POSITION (APP) SENSOR CIRCUIT "A" RANGE/PERFORMANCE, HIGH/LOW VOLTAGE
- G270236t63 : CHECK THE APP SENSOR SENSE CIRCUIT FOR HIGH RESISTANCE
- G270236t64 : CHECK THE APP SENSOR SENSE CIRCUIT FOR SHORT TO HIGH VOLTAGE
- G270236t65 : CHECK THE APP SENSOR SENSE CIRCUIT FOR SHORT TO GROUND
- G270236t66 : CHECK THE APP SENSOR COMMON REFERENCE VOLTAGE AT THE SENSOR
- G270236t67 : CHECK THE APP SENSOR COMMON REFERENCE VOLTAGE CIRCUIT
- G270236t68 : CHECK THE APP SENSOR COMMON REFERENCE GROUND
- G270236t69 : CHECK THE APP SENSOR COMMON REFERENCE GROUND CIRCUIT
- PINPOINT TEST G270236p19 : DTC P1221, P1222, P1223; ACCELERATOR PEDAL POSITION (APP) SENSOR CIRCUIT "B" RANGE/PERFORMANCE, HIGH/LOW VOLTAGE
- G270236t70 : CHECK THE APP SENSOR SENSE CIRCUIT FOR HIGH RESISTANCE
- G270236t71 : CHECK THE APP SENSOR SENSE CIRCUIT FOR SHORT TO HIGH VOLTAGE
- G270236t72 : CHECK THE APP SENSOR SENSE CIRCUIT FOR SHORT TO GROUND
- G270236t73 : CHECK THE APP SENSOR COMMON REFERENCE VOLTAGE AT THE SENSOR
- G270236t74 : CHECK THE APP SENSOR COMMON REFERENCE VOLTAGE CIRCUIT
- G270236t75 : CHECK THE APP SENSOR COMMON REFERENCE GROUND
- G270236t76 : CHECK THE APP SENSOR COMMON REFERENCE GROUND CIRCUIT
- PINPOINT TEST G270236p20 : DTC P1224, P1229; THROTTLE CONTROL POSITION SENSOR ERROR/THROTTLE MOTOR CONTROL CIRCUIT MALFUNCTION
- G270236t77 : CHECK THE TP SENSOR TO ECM SENSE CIRCUIT 1 FOR HIGH RESISTANCE
- G270236t78 : CHECK THROTTLE MOTOR RELAY CONSTANT SUPPLY
- G270236t79 : CHECK THROTTLE MOTOR RELAY EMS SWITCHED SUPPLY
- G270236t80 : CHECK THROTTLE MOTOR RELAY TO ECM CIRCUIT FOR HIGH RESISTANCE
- G270236t81 : CHECK THROTTLE MOTOR RELAY OUTPUT TO ECM
- G270236t82 : CHECK THROTTLE MOTOR TO ECM DRIVE SUPPLY CIRCUIT FOR HIGH RESISTANCE
- G270236t83 : CHECK THROTTLE MOTOR TO ECM DRIVE GROUND CIRCUIT FOR HIGH RESISTANCE
- G270236t84 : CHECK THROTTLE MOTOR TO ECM DRIVE SUPPLY CIRCUIT FOR SHORT TO HIGH VOLTAGE
- G270236t85 : CHECK THROTTLE MOTOR TO ECM DRIVE SUPPLY CIRCUIT FOR SHORT TO GROUND
- PINPOINT TEST G270236p21 : DTC P1226; MECHANICAL GUARD SENSOR RANGE/PERFORMANCE, HIGH/LOW VOLTAGE
- PINPOINT TEST G270236p22 : DTC P1230; FUEL PUMP RELAY MALFUNCTION
- G270236t90 : CHECK THE FUEL PUMP RELAY TO ECM CIRCUIT FOR HIGH RESISTANCE
- G270236t91 : CHECK THE FUEL PUMP RELAY TO ECM CIRCUIT FOR SHORT TO HIGH VOLTAGE
- G270236t92 : CHECK THE FUEL PUMP RELAY TO ECM CIRCUIT FOR SHORT TO GROUND
- G270236t93 : CHECK THE FUEL PUMP RELAY CONSTANT POWER SUPPLY
- G270236t94 : CHECK THE FUEL PUMP RELAY IGNITION SWITCHED POWER SUPPLY
- G270236t95 : CHECK THE FUEL PUMP RELAY ECM SWITCHED GROUND SUPPLY
- PINPOINT TEST G270236p23 : DTC P1240, P1241, P1242; SENSOR REFERENCE VOLTAGE MALFUNCTION, HIGH/LOW VOLTAGE (THROTTLE SENSORS, FUEL TANK PRESSURE SENSOR)
- G270236t96 : CHECK THE REFERENCE VOLTAGE AT THE APP SENSOR/MECHANICAL GUARD SENSOR
- G270236t97 : CHECK THE APP SENSOR/MECHANICAL GUARD SENSOR REFERENCE VOLTAGE CIRCUIT FOR HIGH RESISTANCE
- G270236t98 : CHECK THE APP SENSOR/MECHANICAL GUARD SENSOR REFERENCE VOLTAGE CIRCUIT FOR SHORT TO HIGH VOLTAGE
- G270236t99 : CHECK THE APP SENSOR/MECHANICAL GUARD SENSOR REFERENCE VOLTAGE CIRCUIT FOR SHORT TO GROUND
- G270236t100 : CHECK THE REFERENCE VOLTAGE AT THE THROTTLE POSITION SENSOR
- G270236t101 : CHECK THE THROTTLE POSITION SENSOR REFERENCE VOLTAGE CIRCUIT FOR HIGH RESISTANCE
- G270236t102 : CHECK THE THROTTLE POSITION SENSOR REFERENCE VOLTAGE CIRCUIT FOR SHORT TO HIGH VOLTAGE
- G270236t103 : CHECK THE THROTTLE POSITION SENSOR REFERENCE VOLTAGE CIRCUIT FOR SHORT TO GROUND
- G270236t104 : CHECK THE REFERENCE VOLTAGE AT THE FUEL TANK PRESSURE SENSOR
- G270236t105 : CHECK THE FUEL TANK PRESSURE SENSOR REFERENCE VOLTAGE CIRCUIT FOR HIGH RESISTANCE
- G270236t106 : CHECK THE FUEL TANK PRESSURE SENSOR REFERENCE VOLTAGE CIRCUIT FOR SHORT TO HIGH VOLTAGE
- G270236t107 : CHECK THE FUEL TANK PRESSURE SENSOR REFERENCE VOLTAGE CIRCUIT FOR SHORT TO GROUND
- PINPOINT TEST G270236p24 : DTC P1243; SENSOR REFERENCE GROUND MALFUNCTION (THROTTLE SENSORS, FUEL TANK PRESSURE SENSOR, ECT, IAT, IAT 2 SENSORS)
- G270236t108 : CHECK THE SENSOR REFERENCE GROUND AT THE THROTTLE SENSORS
- G270236t109 : CHECK THE THROTTLE SENSOR REFERENCE GROUND CIRCUIT FOR HIGH RESISTANCE
- G270236t110 : CHECK THE SENSOR REFERENCE GROUND AT THE APP SENSOR/MECHANICAL GUARD SENSOR
- G270236t111 : CHECK THE APP SENSOR/MECHANICAL GUARD SENSOR REFERENCE GROUND CIRCUIT FOR HIGH RESISTANCE
- G270236t112 : CHECK THE SENSOR REFERENCE GROUND AT THE FUEL TANK PRESSURE SENSOR
- G270236t113 : CHECK THE FUEL TANK PRESSURE SENSOR REFERENCE GROUND CIRCUIT FOR HIGH RESISTANCE
- G270236t114 : CHECK THE SENSOR REFERENCE GROUND AT THE ECT SENSOR
- G270236t115 : CHECK THE ECT SENSOR REFERENCE GROUND CIRCUIT FOR HIGH RESISTANCE
- G270236t116 : CHECK THE SENSOR REFERENCE GROUND AT THE IAT SENSOR (MAF)
- G270236t117 : CHECK THE IAT SENSOR REFERENCE GROUND CIRCUIT FOR HIGH RESISTANCE
- G270236t118 : CHECK THE SENSOR REFERENCE GROUND AT THE IAT SENSOR #2
- G270236t119 : CHECK THE IAT SENSOR #2 REFERENCE GROUND CIRCUIT FOR HIGH RESISTANCE
- PINPOINT TEST G270236p25 : DTC P1245, P1246; ENGINE CRANK SIGNAL LOW/HIGH VOLTAGE
- PINPOINT TEST G270236p26 : DTC P1260; SECURITY INPUT MALFUNCTION
- PINPOINT TEST G270236p29 : DTC P1474; INTERCOOLER COOLANT PUMP RELAY MALFUNCTION
- G270236t129 : CHECK THE INTERCOOLER PUMP RELAY TO ECM DRIVE CIRCUIT FOR HIGH RESISTANCE
- G270236t130 : CHECK THE INTERCOOLER PUMP RELAY TO ECM DRIVE CIRCUIT FOR SHORT TO HIGH VOLTAGE
- G270236t131 : CHECK THE INTERCOOLER PUMP RELAY TO ECM DRIVE CIRCUIT FOR SHORT TO GROUND
- G270236t132 : CHECK THE INTERCOOLER PUMP RELAY GROUND CIRCUIT
- PINPOINT TEST G270236p30 : DTC P1475; RADIATOR FANS SLOW (SERIES) CIRCUIT MALFUNCTION
- G270236t133 : CHECK THE RADIATOR FAN MODULE TO ECM "SERIES" DRIVE CIRCUIT FOR HIGH RESISTANCE
- G270236t134 : CHECK THE RADIATOR FAN MODULE TO ECM "SERIES" DRIVE CIRCUIT FOR SHORT TO HIGH VOLTAGE
- G270236t135 : CHECK THE RADIATOR FAN MODULE TO ECM "SERIES" DRIVE CIRCUIT FOR SHORT TO GROUND
- G270236t136 : CHECK THE RADIATOR FAN MODULE IGNITION SUPPLY
- PINPOINT TEST G270236p31 : DTC P1476; RADIATOR FANS FAST (PARALLEL) CIRCUIT MALFUNCTION
- G270236t137 : CHECK THE RADIATOR FAN MODULE TO ECM "PARALLEL" DRIVE CIRCUIT FOR HIGH RESISTANCE
- G270236t138 : CHECK THE RADIATOR FAN MODULE TO ECM "PARALLEL" DRIVE CIRCUIT FOR SHORT TO HIGH VOLTAGE
- G270236t139 : CHECK THE RADIATOR FAN MODULE TO ECM "PARALLEL" DRIVE CIRCUIT FOR SHORT TO GROUND
- G270236t140 : CHECK THE RADIATOR FAN MODULE IGNITION SUPPLY
- PINPOINT TEST G270236p32 : DTC P1516, P1517; GEAR CHANGE PARK/NEUTRAL DRIVING MALFUNCTION
- PINPOINT TEST G270236p33 : DTC P1606; EMS CONTROL RELAY MALFUNCTION
- PINPOINT TEST G270236p35 : DTC P1646; FUEL PUMP 2 (SC) RELAY MALFUNCTION
- PINPOINT TEST G270236p34 : CHECK ROCHESTER VALVE FUNCTION
- PINPOINT TEST G270236p1 : DTC P0101, P0102, P0103; MASS AIR FLOW (MAF) SENSOR RANGE/PERFORMANCE, HIGH/LOW VOLTAGE
- Removal & Installation
- Camshaft Position (CMP) Sensor (18.30.63)
- Catalyst Monitor Sensor LH (18.30.81)
- Catalyst Monitor Sensor RH (18.30.80)
- Crankshaft Position (CKP) Sensor (18.30.12)
- Engine Control Module (ECM) (18.30.01)
- Engine Coolant Temperature (ECT) Sensor - Vehicles Without: Supercharger (18.30.10)
- Engine Coolant Temperature (ECT) Sensor - Vehicles With: Supercharger (18.30.10)
- Heated Oxygen Sensor (HO2S) LH (18.30.79)
- Heated Oxygen Sensor (HO2S) RH (18.30.78)
- Intake Air Temperature (IAT) Sensor (18.30.52)
- Knock Sensor (KS) LH - Vehicles Without: Supercharger (18.30.92)
- Knock Sensor (KS) LH - Vehicles With: Supercharger (18.30.92)
- Knock Sensor (KS) RH - Vehicles Without: Supercharger (18.30.93)
- Knock Sensor (KS) RH - Vehicles With: Supercharger (18.30.93)
- Mass Air Flow (MAF) Sensor (18.30.15)
- Variable Camshaft Timing (VCT) Oil Control Solenoid (18.30.90)