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Home/Jaguar/S-type/Jaguar S-type I рестайлинг (2004-2008)/Repair manual/Cruise Control Systems/Speed Control: Diagnosis
Contents Section: Cruise Control Systems All sections

Speed Control: Diagnosis Jaguar S-type I рестайлинг

Cruise Control Systems 5 illustrations ~7035 words

Inspection and verification

  1. Verify the customer concern.
  2. Confirm which, if any, warning lights and/or messages were displayed on the instrument cluster. NOTE: If any warning lights and/or messages were displayed when the fault occurred, refer to «Driver Information Chart»(ref-311336-S22324863322009032500000) for DTCs associated with the display, then to the DTC index table for possible sources and actions. Some warnings will appear to clear when the ignition is cycled. This is often because the warning has flagged as a result of one of the vehicle's on-board diagnostic routines having run to detect the fault. If the same routine is not run when the ignition is switched ON , the warning will not reflag until the routine does run. See the DTC summaries for drive cycle routines.
  3. Visually inspect for obvious signs of mechanical or electrical damage. Visual Inspection Chart Mechanical Electrical Speed control module levelling Engine oil level Cooling system coolant level Fuel level Fuel contamination/grade/quality Throttle body Poly-vee belt Fuses Wiring harness Electrical connector(s) Controller Area Network circuits Sensor(s) Engine control module (ECM) Transmission control module
  4. Verify the following systems are working correctly: Air intake system Cooling system Charging system Fuel charging system Ignition system
  5. If an obvious cause for an observed or reported concern is found, correct the cause (if possible) before proceeding to the next step 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.)
  6. If the cause is not visually evident and the Jaguar approved diagnostic system is not available, use a scan tool to retrieve the fault codes before proceeding to the diagnostic trouble code (DTC) index chart, or the symptom chart if no DTCs are set.

An incorrectly aligned speed control module can cause incorrect system operation. Before starting any repair work on the ACC system, check the levelling of the speed control module. For further information, see Speed Control Module Alignment .

Symptom Chart

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

SymptomPossible sourceAction
Speed control inhibited or disabledDefault mode enabled Speed control switch(es) Throttle sensors Stop lamp switchCheck message center for default message. For speed control switch circuit tests, Refer to Pinpoint Test B . For speed control switch input signal tests, Refer to Pinpoint Test C . For headway switch tests, Refer to Pinpoint Test E . For 2.5 and 3.0 L engine throttle position sensor tests, Refer to Electronic Engine Controls . For 4.2 L engine throttle position sensor tests, Refer to Electronic Engine Controls . Check electrical guides for stop light switch information.
Unable to regulate/adjust vehicle speedSteering wheel switch malfunctionFor speed control switch circuit tests, Refer to Pinpoint Test B . For speed control switch input signal tests, Refer to Pinpoint Test C .
Unable to cancel speed control from steering wheelSteering wheel switch malfunctionFor speed control switch circuit tests, Refer to Pinpoint Test B . For speed control switch input signal tests, Refer to Pinpoint Test C .
Unable to cancel speed control from brake pedalBrake cancel switch malfunctionFor brake cancel switch tests, Refer to Pinpoint Test D .

Symptom Chart

Diagnostic trouble code (DTC) index

DTCDescriptionPossible SourceAction
P0566Speed control CANCEL switch ON faultSpeed control switches internal steering wheel circuit: short circuit to GROUND Steering wheel clockspring: short circuit to GROUND Cassette reel to ECM circuit: short circuit to GROUND CANCEL switch failure (stuck ON)For speed control switch circuit tests, Refer to Pinpoint Test B .
P0567Speed control RESUME switch ON faultSpeed control switches internal steering wheel circuit: short circuit to GROUND Steering wheel clockspring: short circuit to GROUND Cassette reel to ECM circuit: short circuit to GROUND RESUME switch failure (stuck ON)For speed control switch circuit tests, Refer to Pinpoint Test B .
P0568Speed control input signal low/high resistanceSpeed control switches internal steering wheel circuit: open circuit, high resistance Steering wheel clockspring: open circuit, high resistance Cassette reel to ECM circuit: open circuit, high resistanceFor speed control switch input signal tests, Refer to Pinpoint Test C .
P0569Speed control Decel - switch ON faultSpeed control switches internal steering wheel circuit: short circuit to GROUND Steering wheel clockspring: short circuit to GROUND Cassette reel to ECM circuit: short circuit to GROUND Decel - switch failureFor speed control switch circuit tests, Refer to Pinpoint Test B .
P0570Speed control SET/+ switch ON faultSpeed control switches internal steering wheel circuit: short circuit to GROUND Steering wheel clockspring: short circuit to GROUND Cassette reel to ECM circuit: short circuit to GROUND SET/+ switch failure (stuck ON)For speed control switch circuit tests, Refer to Pinpoint Test B .
P1571Brake ON/OFF switch; brake cancel switch malfunction. (Note; Brake ON/OFF switch - normally open; brake cancel switch - normally closed)Brake ON/OFF switch to stop lamp relay circuit: open circuit Stop lamp relay to ECM circuit: open circuit, short circuit to GROUND, high resistance Brake ON/OFF switch ignition switched GROUND circuit: open circuit Brake ON/OFF switch failure Brake CANCEL switch to ECM circuit: open circuit, short circuit to GROUND, high resistance Brake CANCEL switch power supply circuit: open circuit Brake CANCEL switch failureFor brake switch circuit tests, Refer to Anti-Lock Control - Stability Assist . For brake cancel switch circuit tests, refer to Pinpoint Test D .
P1696*CAN ECM/ASCCM network malfunctionCAN open circuit fault, ASCCM to ECM CAN short circuit fault ASCCM failure ECM failure*This is the adaptive speed control main DTC. If this DTC is not flagged, the fault is NOT with the adaptive system. For additional information on CAN diagnostics, refer to Communications Network .
P1697Adaptive speed control HEADWAY switch(es) circuit malfunctionSpeed control switches internal steering wheel circuit: short circuit to GROUND, Steering wheel clockspring: short circuit to GROUND Cassette reel to ECM circuit: short circuit to GROUND HEADWAY switch(es) failure (stuck ON)For HEADWAY switch circuit tests, refer to Pinpoint Test E .
C1291Forward Looking Radar (FLR) sensor temperature out of rangeFLR sensor is too warm or too cold ASCCM failureAllow the FLR sensor to warm up or cool down. Contact dealer technical support for advice on possible ASCCM failure.
C1292FLR sensor blockage detectionFLR sensor is blockedRemove any blockages (snow/leaves etc.) from the FLR sensor.
C1293FLR sensor automatic alignment offset angle out of rangeSensor requires mechanical levelling FLR sensor is in service alignment modeCheck module levelling. See Speed Control Module Alignment . Complete service alignment. Refer to the Jaguar approved diagnostic system.
C1294Active speed or vehicle speed out of rangeSpeed related fault with the ECM, TCM, DSCM, or IC modules ASCCM failureCarry out a full vehicle DTC check. Check the ECM, TCM, DSCM, or IC modules for stored codes. Contact dealer technical support for advice on possible ASCCM failure.
C1459Forward alert switch circuit failureForward alert switch to ASCCM circuit short circuit to B+ Forward alert switch to ASCCM circuit open circuit Forward alert switch failureFor forward alert switch circuit tests, refer to Pinpoint Test A .
C1748Forward alert switch circuit short to GROUNDForward alert switch failure Forward alert switch to ASCCM circuit short circuit to GROUNDFor forward alert switch circuit tests, refer to Pinpoint Test A .
C1935Chime circuit failureChime circuit short to B+ or open circuitFor adaptive speed control chime module circuit tests, refer to Pinpoint Test F .
B1342FLR internal sensor faultFLR sensor failureContact dealer technical support for advice on possible ASCCM failure.
B2369Chime output circuit short to GROUNDChime output circuit short to GROUNDFor adaptive speed control chime module circuit tests, refer to Pinpoint Test F .
B2477Module configuration failureASCCM is not correctly configuredConfigure the ASCCM. Refer to the Jaguar approved diagnostic system.
U2023CAN fault message received from other network modulesCAN/ASSCM related fault with the ECM, TCM, DSCM, or IC modules ASCCM internal CAN fault CAN network faultCarry out a full vehicle DTC check. Check the ECM, TCM, DSCM, or IC modules for stored ACC related codes. For CAN circuit tests, Refer to Communications Network .
U2501CAN ECM "token" missingCAN ECM "token" missing on network (other CAN modules also flag ECM "token" missing fault) ECM/CAN faultFor CAN circuit tests, Refer to Communications Network .
U2502CAN TCM "token" missingCAN TCM "token" missing on network (other CAN modules also flag TCM "token" missing fault) TCM/CAN faultFor CAN circuit tests, Refer to Communications Network .
U2503CAN IC "token" missingCAN IC "token" missing on network (other CAN modules also flag IC "token" missing fault) IC/CAN faultFor CAN circuit tests, Refer to Communications Network .
U2504CAN ABS "token" missingCAN ABS "token" missing on network (other CAN modules also flag ABS "token" missing fault) ABS/CAN faultFor CAN circuit tests, Refer to Communications Network .
U2505CAN TCM message missingTCM CAN DTC FlaggedFor CAN circuit tests, Refer to Communications Network .
U2520CAN IC missingIC CAN circuit short to B+, open circuit, short circuit to groundFor CAN circuit tests, Refer to Communications Network .
U2521CAN DSCM missingDSCM CAN circuit short to B+, open circuit, short circuit to groundFor CAN circuit tests, Refer to Communications Network .
U2522CAN TCM missingTCM CAN circuit short to B+, open circuit, short circuit to groundFor CAN circuit tests, Refer to Communications Network .
U2523CAN ECM missingECM CAN circuit short to B+, open circuit, short circuit to groundFor CAN circuit tests, Refer to Communications Network .
U2516CAN network faultCan network circuit faultFor CAN circuit tests, Refer to Communications Network .

Pinpoint Test A: CHECK THE FORWARD ALERT SWITCH

Note. For a quick function check of the switch action, monitor the LED function as the switch is operated.

Pinpoint Test A

A1 CHECK THE FORWARD ALERT SWITCH GROUND
  1. Disconnect the forward alert switch electrical connector, FC43.
  2. Measure the resistance between FC43, pin 09 (B) and GROUND.
Is the resistance greater than 5 ohms?
YES REPAIR the high resistance circuit. For additional information, refer to the appropriate SYSTEM WIRING DIAGRAMS article. TEST the system for normal operation.
NO Go to step 2 . → A2
A2 CHECK THE FORWARD ALERT SWITCH TO ASCCM CIRCUIT FOR HIGH RESISTANCE
  1. Disconnect the battery negative terminal. Refer to «Battery Disconnect»(ref-311319-S30990335982009032500000) .
  2. Disconnect the ASCCM electrical connector, FH107.
  3. Measure the resistance between FC43, pin 07 (GW) and FH107, pin 12 (GW).
Is the resistance greater than 5 ohms?
YES REPAIR the high resistance circuit. For additional information, refer to appropriate SYSTEM WIRING DIAGRAMS article. TEST the system for normal operation.
NO Go to step 3 . → A3
A3 CHECK THE FORWARD ALERT SWITCH TO ASCCM CIRCUIT FOR SHORT CIRCUIT TO GROUND
  1. Measure the resistance between FC43, pin 07 (GW) and GROUND.
Is the resistance less than 10,000 ohms?
YES REPAIR the short circuit. For additional information, refer to appropriate SYSTEM WIRING DIAGRAMS article. TEST the system for normal operation.
NO Go to step 4 . → A4
A4 CHECK THE FORWARD ALERT SWITCH GROUND CIRCUIT FOR SHORT TO B+
  1. Measure the voltage between FC43, pin 06 (B) and GROUND.
Is the voltage greater than 3 volts?
YES REPAIR the short circuit. This circuit includes the splice IPS 35. For additional information, refer to the appropriate SYSTEM WIRING DIAGRAMS article. TEST the system for normal operation.
NO INSTALL a new forward alert switch. CLEAR the DTC. TEST the system for normal operation. If the DTC is repeated, contact dealer technical support for advice on possible ECM failure.

Pinpoint Test B: DTC P0566, P0567, P0569, P0570: CHECK THE STEERING WHEEL SWITCH CIRCUIT FOR SHORT TO GROUND

WARNINGTO AVOID ACCIDENTAL DEPLOYMENT AND POSSIBLE PERSONAL INJURY, THE BACKUP POWER SUPPLY MUST BE DEPLETED BEFORE REPAIRING OR REPLACING ANY AIR BAG SUPPLEMENTAL RESTRAINT SYSTEM (SRS) COMPONENTS. TO DEPLETE THE BACKUP POWER SUPPLY ENERGY, DISCONNECT THE BATTERY GROUND CABLE AND WAIT ONE MINUTE. FAILURE TO FOLLOW THIS INSTRUCTION MAY RESULT IN PERSONAL INJURY.

Pinpoint Test B

B1 CHECK THE STEERING WHEEL SPEED CONTROL SWITCH CIRCUIT FOR SHORT TO GROUND
  1. Disconnect the battery negative terminal. Refer to «Battery Disconnect»(ref-311319-S30990335982009032500000) .
  2. Wait one minute for the system to become safe.
  3. Disconnect the ECM electrical connector, PI01.
Is the resistance less than 10,000 ohms?
YES Go to step 2 . → B2
NO Contact dealer technical support for advice on possible ECM failure.
B2 CHECK THE STEERING WHEEL SPEED CONTROL SWITCH FOR SHORT TO GROUND
  1. Disconnect the steering wheel switch electrical connector, SQ2.
  2. Measure the resistance between SQ02, pin 01 (SR) and GROUND.
  3. Measure the resistance between SQ02, pin 03 (S) and GROUND.
Is either resistance less than 10,000 ohms?
YES Go to step 3 . → B3
NO INSTALL a new speed control switch assembly. See «Speed Control Switch»(ref-311336-S28773457242009032500000) . CLEAR the DTC. TEST the system for normal operation.
B3 CHECK THE STEERING WHEEL CLOCKSPRING FOR SHORT TO GROUND
  1. Disconnect the clockspring electrical connector, SW08.
  2. Measure the resistance between FC117, pin 06 (YG) and GROUND.
  3. Measure the resistance between FC117, pin 08 (WG) and GROUND.
Is either resistance less than 10,000 ohms?
YES REPAIR the short circuit. For additional information, refer to the appropriate SYSTEM WIRING DIAGRAMS article. TEST the system for normal operation.
NO INSTALL a new clockspring. Refer to «Clockspring»(ref-311306-S37197394202009032500000) . CLEAR the DTC. TEST the system for normal operation.
WARNINGTO AVOID ACCIDENTAL DEPLOYMENT AND POSSIBLE PERSONAL INJURY, THE BACKUP POWER SUPPLY MUST BE DEPLETED BEFORE REPAIRING OR REPLACING ANY AIR BAG SUPPLEMENTAL RESTRAINT SYSTEM (SRS) COMPONENTS. TO DEPLETE THE BACKUP POWER SUPPLY ENERGY, DISCONNECT THE BATTERY GROUND CABLE AND WAIT ONE MINUTE. FAILURE TO FOLLOW THIS INSTRUCTION MAY RESULT IN PERSONAL INJURY.

Pinpoint Test C

C1 CHECK THE INTERNAL STEERING WHEEL CIRCUIT FOR HIGH RESISTANCE, RESUME SWITCH CIRCUIT
  1. Disconnect the battery negative terminal. Refer to «Battery Disconnect»(ref-311319-S30990335982009032500000) .
  2. Wait one minute for the system to become safe.
  3. Disconnect the steering wheel switch electrical connector, SQ02.
  4. Measure the resistance between pins 01 (SR) and 03 (S) of the speed control switch.
  5. Operate the RESUME switch.
Does the resistance switch between 4300 and 2100 ohms as the switch is operated?
YES Go to step 2 . → C2
NO INSTALL a new speed control switch assembly. See «Speed Control Switch»(ref-311336-S28773457242009032500000) . CLEAR the DTC. TEST the system for normal operation.
C2 CHECK THE INTERNAL STEERING WHEEL CIRCUIT FOR HIGH RESISTANCE, CANCEL SWITCH CIRCUIT
  1. Operate the CANCEL switch.
Does the resistance switch between 4300 and zero ohms as the switch is operated?
YES Go to step 3 . → C3
NO INSTALL a new speed control switch assembly. See «Speed Control Switch»(ref-311336-S28773457242009032500000) . CLEAR the DTC. TEST the system for normal operation.
C3 CHECK THE INTERNAL STEERING WHEEL CIRCUIT FOR HIGH RESISTANCE, SET/+ SWITCH CIRCUIT
  1. Operate the SET/+ switch.
Does the resistance switch between 4300 and 1100 ohms as the switch is operated?
YES Go to step 4 . → C4
NO INSTALL a new speed control switch assembly. See «Speed Control Switch»(ref-311336-S28773457242009032500000) . CLEAR the DTC. TEST the system for normal operation.
C4 CHECK THE INTERNAL STEERING WHEEL CIRCUIT FOR HIGH RESISTANCE, SET/- SWITCH CIRCUIT
  1. Operate the SET/- switch.
Does the resistance switch between 4300 and 120 ohms as the switch is operated?
YES Go to step 5 . → C5
NO INSTALL a new speed control switch assembly. See «Speed Control Switch»(ref-311336-S28773457242009032500000) . CLEAR the DTC. TEST the system for normal operation.
C5 CHECK THE STEERING WHEEL CLOCKSPRING FOR HIGH RESISTANCE
  1. Disconnect the clockspring electrical connector, FC117.
  2. Measure the resistance between FC117, pin 06 and the steering wheel switch electrical connector, SQ02 pin 03 (S).
Is the resistance greater than 5 ohms?
YES INSTALL a new clockspring. Refer to «Clockspring»(ref-311306-S37197394202009032500000) . CLEAR the DTC. TEST the system for normal operation.
NO Go to step 6 . → C6
C6 CHECK THE STEERING WHEEL CLOCKSPRING FOR HIGH RESISTANCE
  1. Measure the resistance between FC117, pin 08 and the steering wheel switch electrical connector, SQ02 pin 01 (SR).
Is the resistance greater than 5 ohms?
YES INSTALL a new clockspring. Refer to «Clockspring»(ref-311306-S37197394202009032500000) . CLEAR the DTC. TEST the system for normal operation.
NO Go to step 7 . → C7
C7 CHECK THE STEERING WHEEL CLOCKSPRING TO ECM CIRCUITS FOR HIGH RESISTANCE
  1. Disconnect the ECM electrical connector, PI01.
  2. Measure the resistance between FC117, pin 06 (YG) and PI01, pin 48 (YG).
  3. Measure the resistance between FC117, pin 08 (YR) and PI01, pin 47 (YR).
Is either resistance greater than 5 ohms?
YES REPAIR the high resistance circuit. For additional information, refer to the appropriate SYSTEM WIRING DIAGRAMS article. TEST the system for normal operation.
NO Contact dealer technical support for advice on possible ECM failure.

Pinpoint Test D: DTC P1571: BRAKE ON/OFF SWITCH, BRAKE CANCEL SWITCH MALFUNCTION

Pinpoint Test D

D1 CHECK THE POWER SUPPLY TO THE BRAKE CANCEL SWITCH
  1. Disconnect the brake cancel switch electrical connector, CA36.
  2. Turn the ignition switch to the ON position.
  3. Measure the voltage between CA36, pin 01 (OY) and GROUND.
Is the voltage greater than 10 volts?
YES Go to step 2 . → D2
NO REPAIR the circuit between the brake cancel switch and battery. This circuit includes the primary junction box, (fuse 35) and the rear power distribution box, (fuse 25). For additional information, refer to the appropriate SYSTEM WIRING DIAGRAMS article. CLEAR the DTC. TEST the system for normal operation.
D2 CHECK THE BRAKE CANCEL SWITCH TO ECM CIRCUIT FOR HIGH RESISTANCE
  1. Turn the ignition switch to the OFF position.
  2. Disconnect the battery negative terminal. Refer to «Battery Disconnect»(ref-311319-S30990335982009032500000) .
  3. Disconnect the ECM electrical connector, PI01.
  4. Measure the resistance between CA36, pin 02 (OY) and PI01, pin 28 (OY).
Is the resistance greater than 5 ohms?
YES REPAIR the high resistance circuit. For additional information, refer to the appropriate SYSTEM WIRING DIAGRAMS article. CLEAR the DTC. TEST the system for normal operation.
NO Go to step 3 . → D3
D3 CHECK THE BRAKE CANCEL SWITCH TO ECM CIRCUIT FOR SHORT TO B+
  1. Reconnect the battery negative terminal. Refer to «Battery Connect»(ref-311319-S37416569562009032500000) .
  2. Measure the voltage between CA36, pin 02 (OY) and GROUND.
Is the voltage greater than 3 volts?
YES REPAIR the short circuit. For additional information, refer to the appropriate SYSTEM WIRING DIAGRAMS article. CLEAR the DTC. TEST the system for normal operation.
NO Go to step 4 . → D4
D4 CHECK THE BRAKE CANCEL SWITCH TO ECM CIRCUIT FOR SHORT TO GROUND
  1. Measure the resistance between CA36, pin 02 (OY) and GROUND.
Is the resistance less than 10,000 ohms?
YES REPAIR the short circuit. For additional information, refer to the appropriate SYSTEM WIRING DIAGRAMS article. CLEAR the DTC. TEST the system for normal operation.
NO INSTALL a new brake cancel switch assembly. CLEAR the DTC. TEST the system for normal operation.
WARNINGTO AVOID ACCIDENTAL DEPLOYMENT AND POSSIBLE PERSONAL INJURY, THE BACKUP POWER SUPPLY MUST BE DEPLETED BEFORE REPAIRING OR REPLACING ANY AIR BAG SUPPLEMENTAL RESTRAINT SYSTEM (SRS) COMPONENTS. TO DEPLETE THE BACKUP POWER SUPPLY ENERGY, DISCONNECT THE BATTERY GROUND CABLE AND WAIT ONE MINUTE. FAILURE TO FOLLOW THIS INSTRUCTION MAY RESULT IN PERSONAL INJURY.

Pinpoint Test E

E1 CHECK THE SPEED CONTROL HEADWAY - SWITCH FUNCTION
  1. Disconnect the battery negative terminal. Refer to «Battery Disconnect»(ref-311319-S30990335982009032500000) .
  2. Wait one minute for the system to become safe.
  3. Disconnect the steering wheel switch electrical connector, SQ02.
  4. Connect an ohmmeter across pins 01 (SR) and 03 (S) of the speed control switch.
  5. Operate the HEADWAY switch.
Does the resistance switch between 4300 and 600 ohms as the switch is operated?
YES Go to step 2 . → E2
NO INSTALL a new speed control switch assembly. See «Speed Control Switch»(ref-311336-S28773457242009032500000) . CLEAR the DTC. TEST the system for normal operation.
E2 CHECK THE SPEED CONTROL HEADWAY + SWITCH FUNCTION
  1. Operate the HEADWAY switch.
Does the resistance switch between 4300 and 300 ohms as the switch is operated?
YES Go to step 3 . → E3
NO INSTALL a new speed control switch assembly. See «Speed Control Switch»(ref-311336-S28773457242009032500000) . CLEAR the DTC. TEST the system for normal operation.
E3 CHECK THE SPEED CONTROL SWITCH INTERNAL HARNESS FOR SHORT CIRCUIT TO GROUND
  1. Measure the resistance between the steering wheel switch electrical connector, SQ02 pin 01 (SR) and GROUND.
  2. Measure the resistance between the steering wheel switch electrical connector, SQ02 pin 03 (S) and GROUND.
Is either resistance less than 10,000 ohms?
YES REPAIR the short circuit. For additional information, refer to the appropriate SYSTEM WIRING DIAGRAMS article. CLEAR the DTC. TEST the system for normal operation.
NO Check the clockspring for short circuit to ground. Refer to «Pinpoint Test B»(ref-311336-S13542729952009032500000) . test 2. (The clockspring is the same for adaptive and non-adaptive vehicles).

Pinpoint Test F

F1 CHECK THE POWER SUPPLY TO THE ADAPTIVE SPEED CONTROL CHIME MODULE
  1. Disconnect the adaptive speed control chime module electrical connector, FC120.
  2. Turn the ignition switch to the ON position.
  3. Measure the voltage between FC120, pin 01 (YR) and GROUND.
Is the voltage greater than 10 volts?
YES Go to step 2 . → F2
NO REPAIR the circuit between the adaptive speed control chime module and battery. This circuit includes the primary junction box, (fuse 16). For additional information, refer to the appropriate SYSTEM WIRING DIAGRAMS article. CLEAR the DTC. TEST the system for normal operation.
F2 CHECK THE ADAPTIVE SPEED CONTROL CHIME MODULE TO ASCCM CIRCUIT FOR HIGH RESISTANCE
  1. Turn the ignition switch to the OFF position.
  2. Disconnect the battery negative terminal. Refer to «Battery Disconnect»(ref-311319-S30990335982009032500000) .
  3. Disconnect the ASCCM electrical connector, FH107.
  4. Measure the resistance between FC120, pin 03 (G) and FH107, pin 06 (G).
Is the resistance greater than 5 ohms?
YES REPAIR the high resistance circuit. For additional information, refer to the appropriate SYSTEM WIRING DIAGRAMS article. CLEAR the DTC. TEST the system for normal operation.
NO Go to step 3 . → F3
F3 CHECK THE ADAPTIVE SPEED CONTROL CHIME MODULE TO ASCCM CIRCUIT FOR SHORT TO B+
  1. Reconnect the battery negative terminal. Refer to «Battery Connect»(ref-311319-S37416569562009032500000) .
  2. Measure the voltage between FC120, pin 03 (G) and GROUND.
Is the voltage greater than 3 volts?
YES REPAIR the short circuit. For additional information, refer to the appropriate SYSTEM WIRING DIAGRAMS article. CLEAR the DTC. TEST the system for normal operation.
NO Go to step 4 . → F4
F4 CHECK THE ADAPTIVE SPEED CONTROL CHIME MODULE TO ASCCM CIRCUIT FOR SHORT TO GROUND
  1. Measure the resistance between FC120, pin 03 (G) and GROUND.
Is the resistance less than 10,000 ohms?
YES REPAIR the short circuit. For additional information, refer to the appropriate SYSTEM WIRING DIAGRAMS article. CLEAR the DTC. TEST the system for normal operation.
NO INSTALL a new adaptive speed control chime module. CLEAR the DTC. TEST the system for normal operation.
  1. Verify the customer concern.
  2. Confirm which, if any, warning lights and/or messages were displayed on the instrument cluster.
  3. Visually inspect for obvious signs of mechanical or electrical damage. Visual Inspection Chart Mechanical Electrical Forward looking radar (FLR) sensor levelling Engine oil level Cooling system coolant level Fuel level Fuel contamination/grade/quality Throttle body Poly-vee belt Fuses Wiring harness Electrical connector(s) Controller Area Network (CAN) circuits Sensor(s) Forward looking radar (FLR) sensor Engine control module (ECM) Adaptive speed control module Transmission control module (TCM)
  4. If an obvious cause for an observed or reported concern is found, correct the cause (if possible) before proceeding to the next step.
  5. If the cause is not visually evident use the Jaguar approved diagnostic system or a scan tool to retrieve the fault codes before proceeding to the diagnostic trouble code (DTC) index chart, or the symptom chart if no DTCs are set.

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

SymptomPossible sourceAction
Speed control inhibited or disabledDefault mode enabled Supply voltage to ACC module Supply voltage to FLR sensor Steering wheel speed control switch(es) Steering wheel speed control switch circuit Throttle sensors Stop lamp switchCheck message center for default message. For ACC module circuit tests, Refer to Pinpoint Test H . For FLR sensor circuit tests, Refer to Pinpoint Test H . For steering wheel speed control switch tests, Refer to Pinpoint Test I . For steering wheel speed control switch circuit tests, Refer to Pinpoint Test I . For 3.0 L engine throttle position sensor tests, Refer to Electronic Engine Controls - VIN Range: N52048->N99999 . For 3.5 and 4.2 L engine throttle position sensor tests, Refer to Electronic Engine Controls - VIN Range: N52048->N99999 . For brake cancel switch tests, Refer to Pinpoint Test J .
Unable to regulate/adjust vehicle speedSteering wheel switch malfunctionFor speed control switch circuit tests, Refer to Pinpoint Test I . For speed control switch input signal tests, Refer to Pinpoint Test I .
Unable to cancel speed control from steering wheelSteering wheel switch malfunctionFor speed control switch circuit tests, Refer to Pinpoint Test I . For speed control switch input signal tests, Refer to Pinpoint Test I .
Unable to cancel speed control from brake pedalBrake cancel switch malfunctionFor brake cancel switch tests, Refer to Pinpoint Test J .

Symptom Chart

DTC index

DTCDescriptionPossible SourceAction
C1291Forward looking radar (FLR) sensor temperature out of rangeFLR sensor is too warm or too cold FLR sensor failureWarm up or cool down the FLR sensor to above 40°C or below 70°C. CLEAR the DTC. TEST the system for normal operation. If the DTC is repeated, INSTALL a new FLR sensor. See Speed Control Sensor .
C1292FLR sensor blockage detectionFLR sensor is blockedRemove any blockages (snow/leaves etc.) from the FLR sensor.
C1293FLR sensor automatic alignment offset angle out of rangeSensor requires mechanical levelling FLR sensor is in service alignment modeCheck FLR sensor levelling (This is done in a similar way to control module alignment in earlier systems). Complete service alignment. Refer to the Jaguar approved diagnostic system.
C1294Active speed or vehicle speed out of rangeSpeed related fault with the engine control module (ECM), transmission control module (TCM), dynamic suspension control module (DSCM), or instrument cluster modules ACC module failureCarry out a full vehicle DTC check. Check the ECM, TCM, DSCM, or instrument cluster modules for stored codes. If no DTC's are indicated in the ECM, TCM, DSCM, or instrument cluster modules, INSTALL a new ACC module. See Speed Control Module .
C1459Forward alert switch circuit failureForward alert switch failure Forward alert switch to ACC module circuit short circuit to B+ Forward alert switch to ACC module circuit open circuitFor forward alert switch circuit tests, Refer to Pinpoint Test A .
C1748Forward alert switch circuit short to GROUNDForward alert switch failure Forward alert switch to ACC module circuit short circuit to GROUNDFor forward alert switch circuit tests, Refer to Pinpoint Test B .
B2373Forward alert switch LED 1 circuit failureForward alert switch failure Forward alert switch LED to ACC module circuit short to B+ Forward alert switch LED to ACC module circuit open circuitFor forward alert switch LED tests, Refer to Pinpoint Test C .
C1920Forward alert switch LED 1 circuit short to GROUNDForward alert switch failure Forward alert switch LED to ACC module circuit short circuit to GROUNDFor forward alert switch LED tests, Refer to Pinpoint Test D .
C1935Chime circuit failureChime module to ACC module circuit short to B+ Chime module to ACC module circuit open circuitFor adaptive speed control chime module circuit tests, Refer to Pinpoint Test E .
B1342Internal ACC module faultACC module failureINSTALL a new ACC module. See Speed Control Module .
B2369Chime output circuit short to GROUNDChime output circuit short to GROUNDFor adaptive speed control chime module circuit tests, Refer to Pinpoint Test F .
B2477Module configuration failureACC module is not correctly configuredConfigure the ACC module. Refer to the Jaguar approved diagnostic system.
U2023CAN fault message received from other network modulesCAN/ACC module related fault with the ECM, TCM, DSCM, or instrument cluster modules ACC module internal CAN fault CAN network faultCarry out a full vehicle DTC check. Check the ECM, TCM, DSCM, or instrument cluster modules for stored ACC related codes. For CAN circuit tests, Refer to Communications Network - VIN Range: N52048->N99999 .
U2520CAN IC missingIC CAN circuit short to B+, open circuit, short circuit to groundFor CAN circuit tests, Refer to Communications Network - VIN Range: N52048->N99999 .
U2521CAN DSCM missingDSCM CAN circuit short to B+, open circuit, short circuit to groundFor CAN circuit tests, Refer to Communications Network - VIN Range: N52048->N99999 .
U2522CAN TCM missingTCM CAN circuit short to B+, open circuit, short circuit to groundFor CAN circuit tests, Refer to Communications Network - VIN Range: N52048->N99999 .
U2523CAN ECM missingECM CAN circuit short to B+, open circuit, short circuit to groundFor CAN circuit tests, Refer to Communications Network - VIN Range: N52048->N99999 .
U2516CAN network faultCan network circuit faultFor CAN circuit tests, Refer to Communications Network - VIN Range: N52048->N99999 .
U0433Invalid data from FLR sensorFLR sensor failureINSTALL a new FLR sensor. See Speed Control Sensor .
U0235No communication with FLR sensorFLR sensor FLR sensor CAN circuitFLR sensor CAN circuit tests, Refer to Pinpoint Test G .
P0610ACC module vehicle option configuration errorECM configuration does not support ACCCheck the configuration of the ECM. Refer to the Jaguar approved diagnostic system.
P2583FLR sensor dataFLR sensor FLR sensor CAN circuitFLR sensor CAN circuit tests, Refer to Pinpoint Test G .

Pinpoint Test A: DTC C1459: FORWARD ALERT SWITCH CIRCUIT TESTS

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. For a quick function check of the switch action, monitor the LED function as the switch is operated.

Pinpoint Test A

A1 CHECK THE FORWARD ALERT SWITCH FOR OPEN CIRCUIT
  1. Disconnect the battery negative terminal.
  2. Disconnect the ACC module connector IP78.
  3. Disconnect the forward alert switch connector IP50.
  4. Measure the resistance between the ACC module connector IP78, pin 20 (U) and forward alert switch connector IP50, pin 04 (U).
Is the resistance greater than 5 ohms?
YES REPAIR the high resistance circuit. For additional information, refer to the appropriate SYSTEM WIRING DIAGRAMS article. CLEAR the DTC. TEST the system for normal operation.
NO Go to step 2 . → A2
A2 CHECK THE FORWARD ALERT SWITCH FOR SHORT CIRCUIT TO B+
  1. Reconnect the battery negative terminal.
  2. Turn the ignition switch to the ON position.
  3. Measure the voltage between the ACC module connector IP78, pin 20 (U) and GROUND.
Is the voltage greater than 3 volts?
YES REPAIR the short circuit. For additional information, refer to the appropriate SYSTEM WIRING DIAGRAMS article. CLEAR the DTC. TEST the system for normal operation.
NO INSTALL a new forward alert switch. See «Speed Control Deactivator Switch»(ref-311336-S00569326172009032500000) . CLEAR the DTC. TEST the system for normal operation. If the DTC is repeated, INSTALL a new ACC module and see «Speed Control Module»(ref-311336-S35788979212009032500000) .

Pinpoint Test B: DTC C1748: FORWARD ALERT SWITCH CIRCUIT TEST

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. For a quick function check of the switch action, monitor the LED function as the switch is operated.

Pinpoint Test B

B1 CHECK THE FORWARD ALERT SWITCH CIRCUIT FOR SHORT CIRCUIT TO GROUND
  1. Disconnect the battery negative terminal.
  2. Disconnect the ACC module connector IP78.
  3. Disconnect the forward alert switch connector IP50.
  4. Measure the resistance between the ACC module connector, pin 20 (U) and GROUND.
Is the resistance less than 10,000 ohms?
YES REPAIR the short circuit. For additional information, refer to the appropriate SYSTEM WIRING DIAGRAMS article. CLEAR the DTC. TEST the system for normal operation.
NO INSTALL a new forward alert switch. See «Speed Control Deactivator Switch»(ref-311336-S00569326172009032500000) . CLEAR the DTC. TEST the system for normal operation. If the DTC is repeated, INSTALL a new ACC module and see «Speed Control Module»(ref-311336-S35788979212009032500000) .

Pinpoint Test C: DTC B2373: FORWARD ALERT SWITCH LED CIRCUIT TESTS

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.

Pinpoint Test C

C1 CHECK THE FORWARD ALERT SWITCH LED CIRCUIT FOR OPEN CIRCUIT
  1. Disconnect the battery negative terminal.
  2. Disconnect the ACC module connector IP78.
  3. Disconnect the forward alert switch connector IP50.
  4. Measure the resistance between the ACC module connector IP78, pin 05 (U) and forward alert switch connector IP50, pin 07 (U).
Is the resistance greater than 5 ohms?
YES REPAIR the high resistance circuit. For additional information, refer to the appropriate SYSTEM WIRING DIAGRAMS article. CLEAR the DTC. TEST the system for normal operation.
NO Go to step 2 . → C2
C2 CHECK THE FORWARD ALERT SWITCH LED CIRCUIT FOR SHORT CIRCUIT TO B+
  1. Reconnect the battery negative terminal.
  2. Turn the ignition switch to the ON position.
  3. Measure the voltage between the ACC module connector IP78, pin 05 (U) and GROUND.
Is the voltage greater than 3 volts?
YES REPAIR the short circuit. For additional information, refer to the appropriate SYSTEM WIRING DIAGRAMS article. CLEAR the DTC. TEST the system for normal operation.
NO INSTALL a new forward alert switch. See «Speed Control Deactivator Switch»(ref-311336-S00569326172009032500000) . CLEAR the DTC. TEST the system for normal operation. If the DTC is repeated, INSTALL a new ACC module, not the forward looking sensor and see «Speed Control Module»(ref-311336-S35788979212009032500000) .

Pinpoint Test D: DTC C1920: FORWARD ALERT SWITCH LED CIRCUIT TESTS

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.

Pinpoint Test D

D1 CHECK THE FORWARD ALERT SWITCH LED CIRCUIT FOR SHORT CIRCUIT TO GROUND
  1. Disconnect the battery negative terminal.
  2. Disconnect the ACC module connector IP78.
  3. Disconnect the forward alert switch connector IP50.
  4. Measure the resistance between the ACC module connector, pin 05 (U) and GROUND.
Is the resistance less than 10,000 ohms?
YES REPAIR the short circuit. For additional information, refer to the appropriate SYSTEM WIRING DIAGRAMS article. CLEAR the DTC. TEST the system for normal operation.
NO INSTALL a new forward alert switch. See «Speed Control Deactivator Switch»(ref-311336-S00569326172009032500000) . CLEAR the DTC. TEST the system for normal operation. If the DTC is repeated, INSTALL a new ACC module, not the forward looking sensor and see «Speed Control Module»(ref-311336-S35788979212009032500000) .

Pinpoint Test E: DTC C1935: CHIME CIRCUIT TESTS

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.

Pinpoint Test E

E1 CHECK THE CHIME CIRCUIT FOR OPEN CIRCUIT
  1. Disconnect the battery negative terminal.
  2. Disconnect the ACC module connector IP78.
  3. Disconnect the chime module connector IP11.
  4. Measure the resistance between the ACC module connector IP78, pin 06 (R) and chime module connector IP11, pin 03 (R).
Is the resistance greater than 5 ohms?
YES REPAIR the open circuit. For additional information, refer to the appropriate SYSTEM WIRING DIAGRAMS article. CLEAR the DTC. TEST the system for normal operation.
NO Go to step 2 . → E2
E2 CHECK THE CHIME CIRCUIT FOR SHORT CIRCUIT TO B+
  1. Reconnect the battery negative terminal.
  2. Connect the battery ground terminal.
  3. Turn the ignition switch to the ON position.
  4. Measure the voltage between the ACC module connector IP78, pin 06 (R) and GROUND.
Is the voltage greater than 3 volts?
YES REPAIR the short circuit. For additional information, refer to the appropriate SYSTEM WIRING DIAGRAMS article. CLEAR the DTC. TEST the system for normal operation.
NO INSTALL a new chime module. CLEAR the DTC. TEST the system for normal operation, If the DTC is repeated, INSTALL a new ACC module, not the forward looking sensor. See «Speed Control Module»(ref-311336-S35788979212009032500000) .

Pinpoint Test F: DTC B2369: CHIME CIRCUIT TEST

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.

Pinpoint Test F

F1 CHECK THE CHIME CIRCUIT FOR SHORT CIRCUIT TO GROUND
  1. Disconnect the battery negative terminal.
  2. Disconnect the ACC module connector IP78.
  3. Disconnect the chime module connector IP11.
  4. Measure the resistance between the ACC module connector IP78, pin 06 (R) and GROUND.
Is the resistance less than 10,000 ohms?
YES REPAIR the short circuit. For additional information, refer to the appropriate SYSTEM WIRING DIAGRAMS article. CLEAR the DTC. TEST the system for normal operation.
NO INSTALL a new chime module. CLEAR the DTC. TEST the system for normal operation. If the DTC is repeated, INSTALL a new ACC module, not the forward looking sensor. See «Speed Control Module»(ref-311336-S35788979212009032500000) .

Pinpoint Test G: DTC U0235, P2583: FLR SENSOR CAN CIRCUIT TESTS

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.

Pinpoint Test G

G1 CHECK THE ACC MODULE TO FLR SENSOR CAN 'L' CIRCUIT FOR OPEN CIRCUIT
  1. Disconnect the battery negative terminal.
  2. Disconnect the ACC module connector IP78.
  3. Disconnect the FLR sensor connector EC23.
  4. Measure the resistance between the ACC module connector IP78, pin 02 (U) and FLR sensor connector EC23, pin 03 (U).
Is the resistance greater than 5 ohms?
YES CHECK connector IP55 for security. REPAIR the open circuit. For additional information, refer to the appropriate SYSTEM WIRING DIAGRAMS article. CLEAR the DTC. TEST the system for normal operation.
NO Go to step 2 . → G2
G2 CHECK THE ACC MODULE TO FLR SENSOR CAN 'L' CIRCUIT FOR SHORT CIRCUIT TO B+
  1. Reconnect the battery negative terminal.
  2. Turn the ignition switch to the ON position.
  3. Measure the voltage between the ACC module connector IP78, pin 02 (U) and GROUND.
Is the voltage greater than 3 volts?
YES REPAIR the short circuit. For additional information, refer to the appropriate SYSTEM WIRING DIAGRAMS article. CLEAR the DTC. TEST the system for normal operation.
NO Go to step 3 . → G3
G3 CHECK THE ACC MODULE TO FLR SENSOR CAN 'L' CIRCUIT FOR SHORT CIRCUIT TO GROUND
  1. Measure the resistance between the ACC module connector IP78, pin 02 (U) and GROUND.
Is the resistance less than 10,000 ohms?
YES REPAIR the short circuit. For additional information, refer to the appropriate SYSTEM WIRING DIAGRAMS article. CLEAR the DTC. TEST the system for normal operation.
NO Go to step 4 . → G4
G4 CHECK THE ACC MODULE TO FLR SENSOR CAN 'H' CIRCUIT FOR OPEN CIRCUIT
  1. Measure the resistance between the ACC module connector IP78, pin 03 (R) and FLR sensor connector EC23, pin 04 (R).
Is the resistance greater than 5 ohms?
YES CHECK connector IP55 for security. REPAIR the open circuit. For additional information, refer to the appropriate SYSTEM WIRING DIAGRAMS article. CLEAR the DTC. TEST the system for normal operation.
NO Go to step 5 . → G5
G5 CHECK THE ACC MODULE TO FLR SENSOR CAN 'H' CIRCUIT FOR SHORT CIRCUIT TO B+
  1. Measure the voltage between the ACC module connector IP78, pin 03 (R) and GROUND.
Is the voltage greater than 3 volts?
YES REPAIR the short circuit. For additional information, refer to the appropriate SYSTEM WIRING DIAGRAMS article. CLEAR the DTC. TEST the system for normal operation.
NO Go to step 6 . → G6
G6 CHECK THE ACC MODULE TO FLR SENSOR CAN 'H' CIRCUIT FOR SHORT CIRCUIT TO GROUND
  1. Measure the resistance between the ACC module connector IP78, pin 03 (R) and GROUND.
Is the resistance less than 10,000 ohms?
YES REPAIR the short circuit. For additional information, refer to the appropriate SYSTEM WIRING DIAGRAMS article. CLEAR the DTC. TEST the system for normal operation.
NO INSTALL a new FLR sensor. See «Speed Control Sensor»(ref-311336-S30298160352009032500000) . CLEAR the DTC. TEST the system for normal operation. If the DTC is repeated, INSTALL a new ACC control module, not the forward looking sensor and see «Speed Control Module»(ref-311336-S35788979212009032500000) .

Pinpoint Test H: ACC SYSTEM VOLTAGE TESTS

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.

Pinpoint Test H

H1 CHECK THE IGNITION SUPPLY TO THE ACC MODULE
  1. Disconnect the battery negative terminal.
  2. Disconnect the ACC module connector IP78.
  3. Reconnect the battery negative terminal.
  4. Turn the ignition switch to the ON position.
  5. Measure the voltage between the ACC connector IP78, pin 14 (WG) and GROUND.
Is the voltage less than 10 volts?
YES REPAIR the circuit between the ACC connector IP78, pin 14 (WG) and battery. This circuit includes the passenger junction fuse box, (fuse 02). For additional information, refer to the appropriate SYSTEM WIRING DIAGRAMS article. TEST the system for normal operation.
NO Go to step 2 . → H2
H2 CHECK THE BATTERY SUPPLY TO THE ACC MODULE
  1. Measure the voltage between the ACC connector IP78, pin 15 (NW) and GROUND.
Is the voltage less than 10 volts?
YES REPAIR the circuit between the ACC module connector IP78, pin 15 (NW) and battery. This circuit includes the passenger junction fuse box, (fuse 27 and the switched system power relay). For additional information, refer to the appropriate SYSTEM WIRING DIAGRAMS article. TEST the system for normal operation.
NO Go to step 3 . → H3
H3 CHECK THE GROUND TO THE ACC MODULE
  1. Turn the ignition switch to the OFF position.
  2. Disconnect the battery negative terminal.
  3. Measure the resistance between the ACC connector IP78, pin 12 (B) and GROUND.
Is the resistance greater than 5 ohms?
YES REPAIR the circuit between the ACC module connector IP78, pin 12 (B) and ground connection G31AL. Check the ground connection for contamination and security. For additional information, refer to the appropriate SYSTEM WIRING DIAGRAMS article. TEST the system for normal operation.
NO Go to step 4 . → H4
H4 CHECK THE IGNITION SUPPLY TO THE FLR SENSOR
  1. Disconnect the FLR sensor connector EC23.
  2. Reconnect the battery negative terminal.
  3. Turn the ignition switch to the ON position.
  4. Measure the voltage between the FLR sensor connector EC23, pin 01 (WG) and GROUND.
Is the voltage less than 10 volts?
YES REPAIR the circuit between the FLR connector EC23, pin 01 (WG) and battery. For additional information, refer to the appropriate SYSTEM WIRING DIAGRAMS article. TEST the system for normal operation.
NO Go to step 5 . → H5
H5 CHECK THE BATTERY SUPPLY TO THE FLR SENSOR
  1. Measure the voltage between the FLR sensor connector EC23, pin 05 (NW) and GROUND.
Is the voltage less than 10 volts?
YES REPAIR the circuit between the FLR sensor connector EC23, pin 05 (NW) and battery. For additional information, refer to the appropriate SYSTEM WIRING DIAGRAMS article. TEST the system for normal operation.
NO Go to step 6 . → H6
H6 CHECK THE GROUND TO THE FLR SENSOR
  1. Turn the ignition switch to the OFF position.
  2. Measure the resistance between the FLR sensor connector EC23, pin 02 (B) and GROUND.
Is the resistance greater than 5 ohms?
YES REPAIR the circuit between the FLR sensor connector EC23, pin 02 (B) and ground connection G01AL. Check ground connection for contamination and security. For additional information, refer to the appropriate SYSTEM WIRING DIAGRAMS article. TEST the system for normal operation.
NO No fault is indicated with the ACC system supply voltages or grounds. To continue the diagnostics, return to the Symptom Chart.
WARNINGTo avoid accidental deployment and possible personal injury, the back-up power supply must be depleted before repairing or replacing any air bag supplemental restraint system (SRS) components. To deplete the back-up power supply energy, disconnect the battery GROUND cable and wait one minute. Failure to follow this instruction may result in personal injury.
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.

Pinpoint Test I

I1 CHECK THE STEERING WHEEL SPEED CONTROL SWITCH CIRCUIT FOR OPEN CIRCUIT
  1. Disconnect the battery negative terminal.
  2. Wait one minute for the system to become safe.
  3. Disconnect the ECM connector PI01.
  4. Measure the resistance between the ECM connector PI01, pin 47 (WG) and ECM connector PI01, pin 48 (YG).
Is the resistance 4310 ohms?
YES Go to step 2 . → I2
NO Go to step 8 . → I8
I2 CHECK THE STEERING WHEEL SPEED CONTROL RESUME SWITCH CIRCUIT
  1. Measure the resistance between the ECM connector PI01, pin 47 (WG) and ECM connector PI01, pin 48 (YG).
  2. Operate the RESUME switch.
Does the resistance switch between 4,310 ohms and 2,110 ohms when the switch is operated?
YES Go to step 3 . → I3
NO INSTALL a new speed control switch assembly. See «Speed Control Switch»(ref-311336-S28773457242009032500000) . TEST the system for normal operation.
I3 CHECK THE STEERING WHEEL SPEED CONTROL SET+ SWITCH CIRCUIT
  1. Measure the resistance between the ECM connector PI01, pin 47 (WG) and ECM connector PI01, pin 48 (YG).
  2. Operate the SET+ switch.
Does the resistance switch between 4,310 ohms and 1,110 ohms when the switch is operated?
YES Go to step 4 . → I4
NO INSTALL a new speed control switch assembly. See «Speed Control Switch»(ref-311336-S28773457242009032500000) . TEST the system for normal operation.
I4 CHECK THE STEERING WHEEL SPEED CONTROL HEADWAY- SWITCH CIRCUIT
  1. Measure the resistance between the ECM connector PI01, pin 47 (WG) and ECM connector PI01, pin 48 (YG).
  2. Operate the HEADWAY- switch.
Does the resistance switch between 4,310 ohms and 600 ohms when the switch is operated?
YES Go to step 5 . → I5
NO INSTALL a new speed control switch assembly. See «Speed Control Switch»(ref-311336-S28773457242009032500000) . TEST the system for normal operation.
I5 CHECK THE STEERING WHEEL SPEED CONTROL HEADWAY+ SWITCH CIRCUIT
  1. Measure the resistance between the ECM connector PI01, pin 47 (WG) and ECM connector PI01, pin 48 (YG).
  2. Operate the HEADWAY+ switch.
Does the resistance switch between 4,310 ohms and 300 ohms when the switch is operated?
YES Go to step 6 . → I6
NO INSTALL a new speed control switch assembly. See «Speed Control Switch»(ref-311336-S28773457242009032500000) . TEST the system for normal operation.
I6 CHECK THE STEERING WHEEL SPEED CONTROL SET- SWITCH CIRCUIT
  1. Measure the resistance between the ECM connector PI01, pin 47 (WG) and ECM connector PI01, pin 48 (YG).
  2. Operate the SET- switch.
Does the resistance switch between 4,310 ohms and 120 ohms when the switch is operated?
YES Go to step 7 . → I7
NO INSTALL a new speed control switch assembly. See «Speed Control Switch»(ref-311336-S28773457242009032500000) . TEST the system for normal operation.
I7 CHECK THE STEERING WHEEL SPEED CONTROL CANCEL SWITCH CIRCUIT
  1. Measure the resistance between the ECM connector PI01, pin 47 (WG) and ECM connector PI01, pin 48 (YG).
  2. Operate the CANCEL switch.
Does the resistance switch between 4,310 ohms and zero ohms when the switch is operated?
YES No fault is indicated with the steering wheel speed control switches or circuit. To continue the diagnostics, return to the Symptom Chart.
NO INSTALL a new speed control switch assembly. See «Speed Control Switch»(ref-311336-S28773457242009032500000) . TEST the system for normal operation.
I8 CHECK THE STEERING WHEEL SPEED CONTROL SWITCH CIRCUIT FOR OPEN CIRCUIT
  1. Disconnect the clockspring connector SW08.
  2. Measure the resistance between the clockspring connector SW08, pin 08, component side and clockspring connector SW08, pin 06, component side.
Is the resistance 4,310 ohms?
YES Go to step 10 . → I10
NO Go to step 9 . → I9
I9 CHECK THE STEERING WHEEL SPEED CONTROL SWITCH FOR OPEN CIRCUIT
  1. Disconnect the steering wheel speed control switch.
  2. Measure the resistance between the steering wheel speed control switch connector pins 01 and 02 component side.
Is the resistance 4,310 ohms?
YES INSTALL a new clockspring. TEST the system for normal operation.
NO INSTALL a new speed control switch assembly. See «Speed Control Switch»(ref-311336-S28773457242009032500000) . TEST the system for normal operation.
I10 CHECK THE STEERING WHEEL SPEED CONTROL SWITCH CIRCUIT FOR OPEN CIRCUIT
  1. Measure the resistance between the ECM connector PI01, pin 47 (WG) and clockspring connector SW08, pin 08 (YR).
Is the resistance greater than 5 ohms?
YES REPAIR the circuit between ECM connector PI01, pin 47 (WG) and clockspring connector SW08, pin 08 (YR). For additional information, refer to the appropriate SYSTEM WIRING DIAGRAMS article. TEST the system for normal operation.
NO Go to step 11 . → I11
I11 CHECK THE STEERING WHEEL SPEED CONTROL SWITCH CIRCUIT FOR OPEN CIRCUIT
  1. Measure the resistance between the ECM connector PI01, pin 48 (YG) and clockspring connector SW08, pin 06 (YG).
Is the resistance greater than 5 ohms?
YES REPAIR the circuit between ECM connector PI01, pin 48 (YG) and clockspring connector SW08, pin 06 (YG). For additional information, refer to the appropriate SYSTEM WIRING DIAGRAMS article. TEST the system for normal operation.
NO INSTALL a new speed control switch assembly. See «Speed Control Switch»(ref-311336-S28773457242009032500000) . TEST the system for normal operation.

Pinpoint Test J: BRAKE CANCEL SWITCH CIRCUIT TEST

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.

Pinpoint Test J

J1 CHECK THE BRAKE CANCEL SWITCH CIRCUIT FOR OPEN
  1. Disconnect the battery negative terminal.
  2. Disconnect the ECM connector PI01.
  3. Reconnect the battery negative terminal.
  4. Turn the ignition switch to the ON position.
  5. Measure the voltage between the ECM connector PI01, pin 09 (U) and GROUND.
Is the voltage less than 12 volts?
YES Go to step 3 . → J3
NO Go to step 2 . → J2
J2 CHECK THE BRAKE CANCEL SWITCH FUNCTION
  1. Press the brake pedal.
Does the voltage drop to zero with the brake pedal pressed?
YES No fault is indicated with the brake cancel switch or circuit. To continue the diagnostics, return to the Symptom Chart.
NO INSTALL a new brake cancel switch. See «Speed Control Deactivator Switch»(ref-311336-S00569326172009032500000) . TEST the system for normal operation.
J3 CHECK THE VOLTAGE TO THE BRAKE CANCEL SWITCH
  1. Disconnect the brake cancel switch connector SW08.
  2. Measure the voltage between the brake cancel connector SW08, pin 01 (WG) and GROUND.
Is the voltage less than 10 volts?
YES REPAIR the circuit between the brake cancel switch connector SW08, pin 01 (WG) and splice ECS12. For additional information, refer to the appropriate SYSTEM WIRING DIAGRAMS article. TEST the system for normal operation.
NO Go to step 4 . → J4
J4 CHECK THE BRAKE CANCEL SWITCH CIRCUIT FOR OPEN CIRCUIT
  1. Turn the ignition switch to the OFF position.
  2. Measure the resistance between the ECM connector PI01, pin 09 (U) and brake cancel switch connector CR77, pin 02 (U).
Is the resistance greater than 5 ohms?
YES REPAIR the circuit between the ECM connector PI01, pin 09 (U) and the brake cancel switch connector CR77, pin 02 (U). For additional information, refer to the appropriate SYSTEM WIRING DIAGRAMS article. TEST the system for normal operation.
NO INSTALL a new brake cancel switch. See «Speed Control Deactivator Switch»(ref-311336-S00569326172009032500000) . TEST the system for normal operation.
  1. Verify the customer concern.
  2. Visually inspect for obvious signs of mechanical or electrical damage.
  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. If the cause is not visually evident, verify the symptom and refer to «Symptom Chart»(ref-311336-S08658831202009032500000) .
ConditionPossible SourceAction

Special Tools Tool Illustration Tool Name Tool Number Inclinometer 501-F007

Scheme 3

Scheme 3: Speed Control Module Alignment - General Procedures
Scheme 3: Speed Control Module Alignment - General Procedures

Note. Make sure the vehicle is positioned on level ground such as the headlamp alignment area.

Scheme 4

Scheme 4
Scheme 4

Scheme 5

Scheme 5
Scheme 5
  1. Remove the left-hand front bumper access cover.
  2. Using the special tool, check the speed control module vertical levelling.
  3. Level the speed control module. Rotate the speed control module levelling bolt to achieve a reading of zero degrees ± 0.75°.
  4. Using the special tool, check the speed control module vertical levelling.
  5. Install the left-hand front bumper access cover.
  6. Carry out the speed control module calibration procedure. For further information, refer to the Jaguar approved diagnostic system.

Scheme 6

Scheme 6: Removal
Scheme 6: Removal

Scheme 7

Scheme 7
Scheme 7
  1. Remove the driver side instrument panel lower panel.
  2. Reposition the driver seat to its maximum rearward position.
  3. Remove the speed control deactivator switch. Disconnect the speed control deactivator switch electrical connector. Remove the speed control deactivator switch.

More articles — Speed Control