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Starting System: Diagnosis Jaguar XKR I рестайлинг

Starter ~1502 words

Verification and Inspection

WARNINGMake sure the vehicle is in NEUTRAL or PARK for vehicles with automatic transmission, NEUTRAL for vehicles with manual transmission, and apply the parking brake. Failure to follow this instruction may result in personal injury.
  1. Verify the customer concern.
  2. Visually inspect for obvious signs of mechanical or electrical damage. Visual Inspection Chart Mechanical Electrical Starter Motor Flywheel Ring Gear Engine Seized Battery condition, state of charge Starter Motor Fuse 3 of the EMS fuse box High power protection module Starter relay Ignition switch Wiring harness(es) Damaged, loose or corroded connectors Key transponder module (KTM) Body processor module (BPM) Engine Control Module (ECM)
  3. If an obvious cause for an observed or reported concern is found, correct the cause, (if possible) before proceeding to the next step.
  4. Where the Jaguar approved diagnostic system is available, complete the S93 report before clearing any or all fault codes from the vehicle. NOTE: If a DTC cannot be cleared, then there is a permanent fault present that flags again as soon as it is cleared. (The exception to this is P1260, which will only clear following an ignition OFF/ON cycle after rectification.)
  5. If the cause is not visually evident and the Jaguar approved diagnostic system is not available, use a fault code reader to retrieve the fault codes before proceeding to the Diagnostic Trouble Code (DTC) Index Chart, or the Symptom Chart if no DTCs are set.
  6. Using the Jaguar approved diagnostic system where available, and a scan tool where not, check the freeze frame data for information on the conditions applicable when the fault was flagged. The format of this will vary, depending on the tool used, but can provide information useful to the technician in diagnosing the fault.
CAUTIONWhen probing connectors to take measurements in the course of the pinpoint tests, use the adaptor kit, part number 3548-1358-00.

Note. When performing electrical voltage or resistance tests, always use a digital multimeter (DMM) accurate to 3 decimal places, and with an up-to-date calibration certificate. When testing resistance, always take the resistance of the DMM leads into account.

Note. Check and rectify basic faults before beginning diagnostic routines involving pinpoint tests.

Symptom (general)Symptom (specific)Possible sourceAction
Non-StartEngine does not crankEngine sized Battery and/or cables Starter motor Starter relay Ignition switch ECM relay TCM Body processor moduleCheck that the engine turns. Check the battery condition and state of charge. For starter motor and cable tests, Refer to Pinpoint Test A .
Engine cranks too fast/slowBattery and/or cables Starter motor Cylinder compressionCheck the battery condition and state of charge. For starter motor and cable tests, Refer to Pinpoint Test A . Check compressions.

Symptom Chart

Diagnostic Trouble Code (DTC) index

DTCDescriptionPossible SourceAction
P0617Starter relay drive circuit high voltage/starter relay request on (ignition switch to the START position)Starter relay drive circuit; short circuit to high voltage Starter relay failureFor relay drive circuit tests, Refer to Pinpoint Test B . For starter relay circuit tests, Refer to Electronic Engine Controls article.
P1245Engine crank signal low voltageBPM to ECM circuit; open circuit Ignition switch to BPM circuit failureFor BPM and ignition switch circuit tests, Refer to Pinpoint Test C .
P1246Engine crank signal high voltageBPM to ECM circuit; short circuit to high voltage Ignition switch to BPM circuit failureFor BPM and ignition switch circuit tests, Refer to Pinpoint Test C .

Pinpoint Test A: CHECK THE POWER SUPPLY, GROUND AND TRIGGER TO THE STARTER CIRCUIT

Note. During cranking with the engine disabled, observe the engine cranking speed. A cranking speed as low as 90 RPM is acceptable, but will be difficult to measure. A degree of discretion must be used as to when an engine is cranking too slowly.

Pinpoint Test A

A1 CHECK THE VOLT DROP ACROSS THE STARTER CIRCUIT
  1. Measure the volt drop across the circuit between the battery positive terminal and the starter motor terminal, ST10.
Is the volt drop greater than 1 volt?
YES CHECK the battery connections, cable connections at false bulkhead stud connector, and starter motor. Make sure all connections are in good condition and secure. If all connections are sound, INSTALL a new battery lead. Refer to «Battery, Mounting and Cables»(ref-311034) article. TEST the system for normal operation.
NO Go to step 2 . → A2
A2 CHECK THE VOLT DROP ACROSS THE STARTER CIRCUIT (CRANKING)
  1. Disable the fuel or ignition system to prevent the engine starting.
  2. Turn the ignition switch to the CRANK position.
  3. Measure the volt drop across the circuit between the battery positive terminal and the starter motor terminal, ST10.
Is the volt drop greater than 1 volt?
YES CHECK the battery connections, cable connections at false bulkhead stud connector, and starter motor. Make sure all connections are in good condition and secure. If all connections are sound, INSTALL a new battery lead. Refer to «Battery, Mounting and Cables»(ref-311034) article. TEST the system for normal operation.
NO Go to step 3 . → A3
A3 CHECK THE GROUND TO THE STARTER MOTOR
  1. Measure the resistance between the engine GROUND lead and the starter motor body.
Is the resistance greater than 5 ohms?
YES Clean the connection between the starter motor body and it's fittings, recheck the resistance. TEST the system for normal operation.
NO Go to step 4 . → A4
A4 CHECK THE STARTER SIGNAL FROM THE STARTER RELAY
  1. Remove fuse 5 from the rear power distribution box to disable the fuel pump module.
  2. Disconnect the starter motor signal electrical connector, ST03 (WR).
  3. Turn the ignition switch to the CRANK position.
  4. Measure the voltage between ST03 (WR) and GROUND.
Is the voltage less than 10 volts?
YES Go to step 5 . → A5
NO INSTALL a new starter motor. Refer to «Starter Motor - Removal and Installation (LHD)»(ref-311058-S06907105092009032300000) . TEST the system for normal operation.
A5 CHECK THE STARTER SIGNAL CIRCUIT FOR HIGH RESISTANCE
  1. Remove the starter relay.
  2. Measure the resistance between the starter relay base, pin 02 and ST03 (WR).
Is the resistance greater than 5 ohms?
YES REPAIR the high resistance circuit. For additional information, See appropriate SYSTEM WIRING DIAGRAMS article. CLEAR the DTC. TEST the system for normal operation.
NO Go to step .

Pinpoint Test B: DTC P0617; STARTER RELAY DRIVE CIRCUIT HIGH VOLTAGE

Pinpoint Test B

B1 CHECK THE STARTER RELAY DRIVE CIRCUIT FOR HIGH RESISTANCE
  1. Disconnect the battery negative terminal.
  2. Remove the starter relay.
  3. Disconnect the ECM electrical connector, EM80.
  4. Measure the resistance between the relay base, pin 02 (O) and EM80, pin 41 (O).
Is the resistance greater than 5 ohms?
YES GO TO relay tests. Refer to «Electronic Engine Controls»(ref-311026) article.
NO INSTALL a new starter motor. Refer to «Starter Motor - Removal and Installation (LHD)»(ref-311058-S06907105092009032300000) . TEST the system for normal operation.

Pinpoint Test C: DTC P1245, P1246; ENGINE CRANK SIGNAL, HIGH/LOW VOLTAGE

Pinpoint Test C

C1 CHECK THE BODY PROCESSOR MODULE (BPM) TO ENGINE CONTROL MODULE (ECM) CIRCUIT FOR HIGH RESISTANCE
  1. Disconnect the battery negative terminal.
  2. Disconnect the ECM electrical connector, EM80.
  3. Disconnect the BPM electrical connector, FC14.
  4. Measure the resistance between EM80, pin 06 (GO) and FC14, pin 72 (GO).
Is the resistance greater than 5 ohms?
YES REPAIR the high resistance circuit. For additional information, See appropriate SYSTEM WIRING DIAGRAMS article. CLEAR the DTC. TEST the system for normal operation.
NO Go to step 2 . → C2
C2 CHECK THE BODY PROCESSOR MODULE (BPM) TO ENGINE CONTROL MODULE (ECM) CIRCUIT FOR SHORT TO HIGH VOLTAGE
  1. Reconnect the battery negative terminal.
  2. Turn the ignition switch to the ON position.
  3. Measure the voltage between EM80, pin 06 (GO) and GROUND.
Is the voltage greater than 3 volts?
YES REPAIR the short circuit. For additional information, See appropriate SYSTEM WIRING DIAGRAMS article. CLEAR the DTC. TEST the system for normal operation.
NO Go to step 3 . → C3
C3 CHECK THE BODY PROCESSOR MODULE (BPM) TO ENGINE CONTROL MODULE (ECM) CIRCUIT FOR SHORT TO GROUND
  1. Turn the ignition switch to the OFF position.
  2. Measure the resistance between EM80, pin 06 (GO) and GROUND.
Is the resistance less than 10,000 ohms?
YES REPAIR the short circuit. For additional information, See appropriate SYSTEM WIRING DIAGRAMS article. CLEAR the DTC. TEST the system for normal operation.
NO Go to step 4 . → C4
C4 CHECK THE IGNITION SWITCH TO BODY PROCESSOR MODULE (BPM) CIRCUIT FOR HIGH RESISTANCE
  1. Disconnect the battery negative terminal.
  2. Disconnect the ignition switch electrical connector, FC04.
  3. Measure the resistance between FC04, pin 01 (GO) and FC14, pin 41 (GO).
Is the resistance greater than 5 ohms?
YES REPAIR the high resistance circuit. For additional information, See appropriate SYSTEM WIRING DIAGRAMS article. CLEAR the DTC. TEST the system for normal operation.
NO Go to step 5 . → C5
C5 CHECK THE IGNITION SWITCH TO BODY PROCESSOR MODULE (BPM) CIRCUIT FOR SHORT TO HIGH VOLTAGE
  1. Reconnect the battery negative terminal.
  2. Turn the ignition switch to the ON position.
  3. Measure the voltage between FC14, pin 41 (GO) and GROUND.
Is the voltage greater than 3 volts?
YES REPAIR the short circuit. For additional information, See appropriate SYSTEM WIRING DIAGRAMS article. CLEAR the DTC. TEST the system for normal operation.
NO Go to step 6 . → C6
C6 CHECK THE IGNITION SWITCH TO BODY PROCESSOR MODULE (BPM) CIRCUIT FOR SHORT TO GROUND
  1. Turn the ignition switch to the OFF position.
  2. Measure the resistance between FC14, pin 41 (GO) and GROUND.
Is the resistance less than 10,000 ohms?
YES REPAIR the short circuit. For additional information, See appropriate SYSTEM WIRING DIAGRAMS article. CLEAR the DTC. TEST the system for normal operation.
NO Check the ignition switch function. (Switching action across the ignition switch contacts) If the switch function is normal, contact Dealer technical support for advice on possible BPM or ECM failure.

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