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Transfer: Diagnosis Nissan Armada I

Transfer Case 41 illustrations ~5488 words

Wiring Diagrams and Trouble Diagnosis

When reading wiring diagrams, refer to the following

  1. «HOW TO READ WIRING DIAGRAMS»(ref-233237-S21475298982006052500000) .
  2. «POWER SUPPLY ROUTING CIRCUIT»(ref-233318-S42666366662006052500000) .

When performing trouble diagnosis, refer to the following

  1. «HOW TO FOLLOW TROUBLE DIAGNOSIS»(ref-233237-S18116608052006052500000) .
  2. «HOW TO PERFORM EFFICIENT DIAGNOSIS FOR AN ELECTRICAL INCIDENT»(ref-233237-S17254668272006052500000) .

NVH Troubleshooting Chart

Use the chart below to help you find the cause of the symptom. The numbers indicate the order of the inspection. If necessary, repair or replace these parts.

Scheme 14

Scheme 14: NVH Troubleshooting Chart
Scheme 14: NVH Troubleshooting Chart

PREPARATION FOR ROAD TEST

  1. The purpose of the test is to determine overall performance of transfer and analyze causes of problems.
  2. When a malfunction is found in any part of transfer, perform the road test to locate the malfunction area and repair the malfunction parts.
  3. The road test consists of the following three parts.

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Scheme 15
Scheme 15
  1. Check before engine is started. Refer to «CHECK BEFORE ENGINE IS STARTED»(ref-233277-S07146212242006052500000) .
  2. Check at idle. Refer to «CHECK AT IDLE»(ref-233277-S06519092582006052500000) .
  3. Cruise test. Refer to «CRUISE TEST»(ref-233277-S41298292982006052500000) .

CRUISE TEST

  1. CHECK INPUT SIGNAL Warm up engine to normal operating temperature. Park vehicle on flat surface. Move A/T selector lever to "P" position. Set 4WD shift switch to "AUTO" position. Start engine. Drive vehicle for at least 30 seconds at a speed higher than 20 km/h (12 MPH). Check 4WD warning lamp turned ON? On steady: Perform the self-diagnosis. Refer to «SELF-DIAGNOSTIC PROCEDURE (WITH CONSULT-II)»(ref-233277-S12863214092006052500000) (with CONSULT-II) or «SELF- DIAGNOSTIC PROCEDURE (WITHOUT CONSULT-II)»(ref-233277-S03706814972006052500000) (without CONSULT-II). Flash rapidly: GO TO «4WD WARNING LAMP FLASHES RAPIDLY»(ref-233277-S32720296652006052500000) . Flash slowly: GO TO «4WD WARNING LAMP FLASHES SLOWLY»(ref-233277-S33740229282006052500000) . NO: GO TO 2 .
  2. CHECK TIGHT CORNER BRAKING SYMPTOM (1) Set 4WD shift switch to "AUTO" position. Drive vehicle at speed lower than 20 km/h (12 MPH) with steering wheel fully turned. Does tight corner braking symptom occur? YES: GO TO «HEAVY TIGHT-CORNER BRAKING SYMPTOM OCCURS»(ref-233277-S20476734862006052500000) . NO: GO TO 3 .
  3. CHECK TIGHT CORNER BRAKING SYMPTOM (2) Set 4WD shift switch to "4HI" position. Drive vehicle at speed lower than 20 km/h (12 MPH) with steering wheel fully turned. Does tight corner braking symptom occur? YES: Inspection End. NO: GO TO «4WD SYSTEM DOES NOT OPERATE»(ref-233277-S36176238652006052500000) .

Trouble Diagnosis Chart for Symptoms

If 4WD warning lamp turns ON, perform self-diagnosis. Refer to SELF - DIAGNOSTIC PROCEDURE .

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Scheme 16: Trouble Diagnosis Chart for Symptoms
Scheme 16: Trouble Diagnosis Chart for Symptoms

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Scheme 17
Scheme 17

Note. Light tight-corner braking symptom may occur depending on driving conditions in AUTO mode. This is not a malfunction. Heavy tight-corner braking symptom occurs when vehicle is driven in the following conditions: 4WD shift switch is "4H" or "4LO", steering wheel is turned fully to either side.

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Scheme 18: Specifications with CONSULT-II
Scheme 18: Specifications with CONSULT-II

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Scheme 23: Specifications Between Transfer Control Unit Terminals
Scheme 23: Specifications Between Transfer Control Unit Terminals

Note. Data are reference value and are measured between each terminal and ground.

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Scheme 27
CAUTIONWhen using a circuit tester to measure voltage for inspection, be sure not to extend forcibly any connector terminals.

How to Erase Self-diagnostic Results

  1. Perform applicable inspection of malfunctioning item and then repair or replace.
  2. Start engine and select "SELF-DIAG RESULTS" mode for "ALL MODE AWD/4WD" with CONSULT-II.
  3. Touch "ERASE" on CONSULT-II screen to erase DTC memory. CAUTION: If memory cannot be erased, perform applicable diagnosis.

SELF-DIAGNOSTIC PROCEDURE (WITH CONSULT-II)

Refer to SELF-DIAGNOSTIC PROCEDURE (WITH CONSULT-II) .

Diagnostic Procedure

  1. Warn up engine.
  2. Move A/T selector lever to "P" position.
  3. Turn 4WD shift switch to "2WD" position.
  4. Turn ignition switch "ON" and "OFF" at least twice, and then turn ignition switch "OFF".
  5. Turn 4WD shift switch to "AUTO" position.
  6. Turn ignition switch "ON". (Do not start engine.)
  7. 4WD warning lamp ON. If 4WD warning lamp does not turn ON, refer to «4WD Warning Lamp Does Not Turn ON»(ref-233277-S17958344532006052500000) .
  8. Move A/T selector lever to "R" position.
  9. Turn 4WD shift switch to "2WD", "AUTO" and "2WD" in order.
  10. Move A/T selector lever to "D" position.
  11. Turn 4WD shift switch to "LOCK", "AUTO" and "LOCK" in order.
  12. Move A/T selector lever to "N" position.
  13. Turn 4WD shift switch to "AUTO" position.
  14. Move A/T selector lever to "P" position.
  15. Read the flickering of 4WD warning lamp. Refer to «Judgement Self-diagnosis»(ref-233277-S27416632502006052500000) .

Judgement Self-diagnosis

When a malfunction is detected, the malfunction route is indicated by flickering of the 4WD warning lamp.

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Scheme 28: Judgement Self-diagnosis
Scheme 28: Judgement Self-diagnosis

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Scheme 31
CAUTIONIf "CAN communication" is displayed with other DTCs, first perform the trouble diagnosis for CAN communication line. If "ABS operation signal", "VDC operation signal" or "TCS operation signal" is displayed, first perform the trouble diagnosis for ABS system. If "Output shaft revolution signal" is displayed, first perform the trouble diagnosis for A/T system.

Note. If "actuator position switch" or "actuator circuit" is displayed, first erase self-diagnostic results. ("Actuator position switch" or "actuator circuit" may be displayed after installing transfer control unit or transfer assembly.) If "clutch pressure switch" or "line pressure switch" is displayed only while driving in reverse, check the continuity of "R" position on A/T PNP switch. When there is nothing wrong with the electrical system, check the hydraulic system.

ERASE SELF-DIAGNOSIS

  1. In order to make it easier to find the cause of hard-to-duplicate malfunctions, malfunction information is stored into the control unit as necessary during use by the user. This memory is not erased no matter how many times the ignition switch is turned ON and OFF.
  2. However, this information is erased by turning ignition switch "OFF" after performing self-diagnostics or by erasing the memory using the CONSULT-II.
  1. INSPECTION START Do you have CONSULT-II? YES or NO YES: GO TO 2 . NO: GO TO 3 .
  2. PERFORM SELF-DIAGNOSIS (WITH CONSULT-II) With CONSULT-II Turn ignition switch "ON". (Do not start engine.) Select "SELF-DIAG RESULTS" mode for "ALL MODE AWD/4WD" with CONSULT-II. Touch "ERASE". Turn ignition switch "OFF" and wait at least 10 seconds. Perform the self-diagnosis again. Is the "CONTROL UNIT 1 [P1802]", "CONTROL UNIT 2 [P1803]", "CONTROL UNIT 3 [P1804]" or "CONTROL UNIT 4 [P1809]" displayed? . YES: Replace transfer control unit. Refer to «Removal and Installation»(ref-233277-S39974486172006052500000) . NO: Inspection End.
  3. PERFORM SELF-DIAGNOSIS (WITHOUT CONSULT-II) Without CONSULT-II Perform the self-diagnosis and then erase self-diagnostic results. Refer to «SELF-DIAGNOSTIC PROCEDURE (WITHOUT CONSULT-II)»(ref-233277-S03706814972006052500000) and «ERASE SELF-DIAGNOSIS»(ref-233277-S40200345402006052500000) . Perform the self-diagnosis again. Do the self-diagnostic results indicate AD converter? YES: Replace transfer control unit. Refer to «Removal and Installation»(ref-233277-S39974486172006052500000) . NO: Inspection End.
  1. CHECK DTC WITH TCM Perform self-diagnosis with TCM. Refer to «SELF-DIAGNOSTIC PROCEDURE (WITH CONSULT-II)»(ref-233277-S12863214092006052500000) . Is any malfunction detected by self-diagnosis? YES: Check the malfunctioning system. NO: GO TO 2 .
  2. CHECK TRANSFER CONTROL UNIT Check transfer control unit input/output signal. Refer to «Transfer Control Unit Input/Output Signal Reference Values»(ref-233277-S01882369842006052500000) . OK or NG OK: GO TO 3 . NG: Check transfer control unit pin terminals for damage or loose connection with harness connector. If any items are damaged, repair or replace damaged parts.
  3. CHECK DTC Perform the self-diagnosis, after driving a vehicle for a while. OK or NG OK: Inspection End. NG: Perform self-diagnosis with TCM again. Refer to «SELF-DIAGNOSTIC PROCEDURE (WITH CONSULT-II)»(ref-233277-S12863214092006052500000) .
  1. CHECK DTC WITH ABS ACTUATOR AND ELECTRIC UNIT (CONTROL UNIT) Perform self-diagnosis with ABS actuator and electric unit (control unit). Refer to «SELF-DIAGNOSIS»(ref-233294-S26289276382006052500000) . Is any malfunction detected by self-diagnosis? YES: Check the malfunctioning system. NO: GO TO 2 .
  2. CHECK TRANSFER CONTROL UNIT Check transfer control unit input/output signal. Refer to «Transfer Control Unit Input/Output Signal Reference Values»(ref-233277-S01882369842006052500000) . OK or NG OK: GO TO 3 . NG: Check transfer control unit pin terminals for damage or loose connection with harness connector. If any items are damaged, repair or replace damaged parts.
  3. CHECK DTC Perform the self-diagnosis, after driving a vehicle for a while. OK or NG OK: Inspection End. NG: Perform self-diagnosis with ABS actuator and electric unit (control unit) again. Refer to «SELF-DIAGNOSIS»(ref-233294-S26289276382006052500000) .
  1. CHECK DTC WITH TCM Perform self-diagnosis with TCM. Refer to «SELF-DIAGNOSTIC PROCEDURE (WITH CONSULT-II)»(ref-233277-S12863214092006052500000) . Is any malfunction detected by self-diagnosis? YES: Check the malfunctioning system. NO: GO TO 2 .
  2. CHECK TRANSFER CONTROL UNIT Check transfer control unit input/output signal. Refer to «Transfer Control Unit Input/Output Signal Reference Values»(ref-233277-S01882369842006052500000) . OK or NG OK: GO TO 3 . NG: Check transfer control unit pin terminals for damage or loose connection with harness connector. If any items are damaged, repair or replace damaged parts.
  3. CHECK DTC Perform the self-diagnosis, after driving a vehicle for a while. OK or NG OK: Inspection End. NG: Perform self-diagnosis with TCM again. Refer to «SELF-DIAGNOSTIC PROCEDURE (WITH CONSULT-II)»(ref-233277-S12863214092006052500000) .
  1. CHECK DTC WITH ECM Perform self-diagnosis with ECM. Refer to «SELF-DIAG RESULTS MODE»(ref-233258-S02609674142006052500000) . Is any malfunction detected by self-diagnosis? YES: Check the malfunctioning system. NO: GO TO 2 .
  2. CHECK TRANSFER CONTROL UNIT Check transfer control unit input/output signal. Refer to «Transfer Control Unit Input/Output Signal Reference Values»(ref-233277-S01882369842006052500000) . OK or NG OK: GO TO 3 . NG: Check transfer control unit pin terminals for damage or loose connection with harness connector. If any items are damaged, repair or replace damaged parts.
  3. CHECK DTC Perform the self-diagnosis, after driving a vehicle for a while. OK or NG OK: Inspection End. NG: Perform self-diagnosis with ECM again. Refer to " «SELF-DIAG RESULTS MODE»(ref-233258-S02609674142006052500000) ".
  1. CHECK DTC WITH ECM Perform self-diagnosis with ECM. Refer to «SELF-DIAG RESULTS MODE»(ref-233258-S02609674142006052500000) . Is any malfunction detected by self-diagnosis? YES: Check the malfunctioning system. NO: GO TO 2 .
  2. CHECK TRANSFER CONTROL UNIT Check transfer control unit input/output signal. Refer to «Transfer Control Unit Input/Output Signal Reference Values»(ref-233277-S01882369842006052500000) . OK or NG OK: GO TO 3 . NG: Check transfer control unit pin terminals for damage or loose connection with harness connector. If any items are damaged, repair or replace damaged parts.
  3. CHECK DTC Perform the self-diagnosis, after driving a vehicle for a while. OK or NG OK: Inspection End. NG: Perform self-diagnosis with ECM again. Refer to «SELF-DIAG RESULTS MODE»(ref-233258-S02609674142006052500000) .
  1. CHECK DTC WITH ABS ACTUATOR AND ELECTRIC UNIT (CONTROL UNIT) Perform self-diagnosis with ABS actuator and electric unit (control unit). Refer to «SELF-DIAGNOSIS»(ref-233294-S26289276382006052500000) . Is any malfunction detected by self-diagnosis? YES: Check the malfunctioning system. NO: GO TO 2 .
  2. CHECK TRANSFER CONTROL UNIT Check transfer control unit input/output signal. Refer to «Transfer Control Unit Input/Output Signal Reference Values»(ref-233277-S01882369842006052500000) . OK or NG OK: GO TO 3 . NG: Check transfer control unit pin terminals for damage or loose connection with harness connector. If any items are damaged, repair or replace damaged parts.
  3. CHECK DTC Perform the self-diagnosis, after driving a vehicle for a while. OK or NG OK: Inspection End. NG: Perform self-diagnosis with ABS actuator and electric unit (control unit) again. Refer to «SELF-DIAGNOSIS»(ref-233294-S26289276382006052500000) .
  1. CHECK DTC WITH ABS ACTUATOR AND ELECTRIC UNIT Perform self-diagnosis with ABS actuator and electric unit (control unit). Refer to «SELF-DIAGNOSIS»(ref-233294-S26289276382006052500000) . Is any malfunction detected by self-diagnosis? YES: Check the malfunctioning system. NO: GO TO 2 .
  2. CHECK TRANSFER CONTROL UNIT Check transfer control unit input/output signal. Refer to «Transfer Control Unit Input/Output Signal Reference Values»(ref-233277-S01882369842006052500000) . OK or NG OK: GO TO 3 . NG: Check transfer control unit pin terminals for damage or loose connection with harness connector. If any items are damaged, repair or replace damaged parts.
  3. CHECK DTC Perform the self-diagnosis, after driving a vehicle for a while. OK or NG OK: Inspection End. NG: Perform self-diagnosis with ABS actuator electric unit (control unit) again. Refer to «SELF-DIAGNOSIS»(ref-233294-S26289276382006052500000) .
  1. CHECK DTC WITH ABS ACTUATOR AND ELECTRIC UNIT (CONTROL UNIT) Perform self-diagnosis with ABS actuator and electric unit (control unit). Refer to «SELF-DIAGNOSIS»(ref-233294-S26289276382006052500000) . Is any malfunction detected by self-diagnosis? YES: Check the malfunctioning system. NO: GO TO 2 .
  2. CHECK TRANSFER CONTROL UNIT Check transfer control unit input/output signal. Refer to «Transfer Control Unit Input/Output Signal Reference Values»(ref-233277-S01882369842006052500000) . OK or NG OK: GO TO 3 . NG: Check transfer control unit pin terminals for damage or loose connection with harness connector. If any items are damaged, repair or replace damaged parts.
  3. CHECK DTC Perform the self-diagnosis, after driving a vehicle for a while. OK or NG OK: Inspection End. NG: Perform self-diagnosis with ABS actuator and electric unit (control unit) again. Refer to «SELF-DIAGNOSIS»(ref-233294-S26289276382006052500000) .

Scheme 32

Scheme 32: DIAGNOSTIC PROCEDURE
Scheme 32: DIAGNOSTIC PROCEDURE
  1. CHECK CAN COMMUNICATION CIRCUIT With CONSULT-II Turn ignition switch "ON" and start engine. Select "SELF-DIAG RESULTS" mode for "ALL MODE AWD/4WD" within CONSULT-II. Perform the self-diagnosis. Is the "CAN COMM CIRCUIT [U 1000]" displayed? YES: Print CONSULT-II screen and go to «PRECAUTIONS WHEN USING CONSULT-II»(ref-233315-S01357186922006052500000) . NO: Inspection End.

SYMPTOM

4WD shift indicator lamp and 4LO indicator lamp do not turn ON for approx. 1 second when turning ignition switch to "ON".

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Scheme 33: DIAGNOSTIC PROCEDURE
Scheme 33: DIAGNOSTIC PROCEDURE

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Scheme 41
  1. CHECK TRANSFER CONTROL UNIT POWER SUPPLY CIRCUIT Turn ignition switch "OFF". (Stay for at least 5 seconds.) Connect transfer control unit harness connector. Check voltage between transfer control unit harness connector terminals and ground. Turn ignition switch "ON". (Do not start engine.) Check voltage between transfer control unit harness connector terminal and ground. OK or NG OK: GO TO 2 . NG: Check the following. If any items are damaged, repair or replace damaged parts. 10A fuses No. 26 located in fuse and fusible link box and No. 59 located in the fuse and relay box. Refer to «POWER SUPPLY ROUTING CIRCUIT»(ref-233318-S42666366662006052500000) . 20A fuse No. 53 located in the IPDM E/R. Refer to «POWER SUPPLY ROUTING CIRCUIT»(ref-233318-S42666366662006052500000) . Harness for short or open between battery and transfer control unit harness connector terminals 47. Harness for short or open between battery and transfer control unit harness connector terminal 29. Harness for short or open between battery and transfer shut off relay harness connector E69 terminal 1 (G), and 3 (G). Harness for short or open between transfer shut off relay harness connector E69 terminal 2 (SB) and transfer control unit harness connector terminal 30. Harness for short or open between transfer shut off relay harness connector E69 terminal 5 (Y/R) and transfer control unit harness connector terminals 16 (Y/R) and 22 (Y/R). Battery and ignition switch. Refer to «POWER SUPPLY ROUTING CIRCUIT»(ref-233318-S42666366662006052500000) . Transfer shut off relay. Refer to «COMPONENT INSPECTION»(ref-233277-S37070158002006052500000) .
  2. CHECK TRANSFER CONTROL UNIT GROUND CIRCUIT Turn ignition switch "OFF". (Stay for at least 5 seconds.) Disconnect transfer control unit harness connector. Check continuity between transfer control unit harness connector E142 terminals 3 (B), 6 (B), E143 terminal 45 (B) and ground. Continuity should exist. Also check harness for short to ground and short to power. OK or NG OK: GO TO 3 . NG: Repair open circuit or short to ground or short to power in harness or connectors.
  3. CHECK COMBINATION METER POWER SUPPLY CIRCUIT Turn ignition switch "OFF". (Stay for at least 5 seconds.) Disconnect transfer control unit harness connector. Check voltage between combination meter harness connector terminal and ground. TERMINALS VOLTAGE REFERENCE Connector Terminal (Wire color) Voltage (Approx.) M24 24 (O/L) - Ground 0V Turn ignition switch "ON". (Do not start engine.) Check voltage between combination meter harness connector terminal and ground. TERMINALS VOLTAGE REFERENCE Connector Terminal (Wire color) Voltage (Approx.) M24 24 (O/L) - Ground Battery voltage OK or NG OK: GO TO 4 . NG: Check the following. If any items are damaged, repair or replace damaged parts. 10A fuse No. 14 located in the fuse block (J/B). Refer to «POWER SUPPLY ROUTING CIRCUIT»(ref-233318-S42666366662006052500000) . Harness for short or open between battery and combination meter harness connector M24 terminal 24 (O/L). Ignition switch. Refer to «POWER SUPPLY ROUTING CIRCUIT»(ref-233318-S42666366662006052500000) .
  4. CHECK HARNESS BETWEEN TRANSFER CONTROL UNIT AND COMBINATION METER Turn ignition switch "OFF". (Stay for at least 5 seconds.) Disconnect transfer control unit harness connector and combination meter harness connector. Check continuity between the following terminals. Transfer control unit harness connector E142 terminal 2 (B/W) and combination meter harness connector M24 terminal 32 (B/W). Transfer control unit harness connector E142 terminal 11 (L) and combination meter harness connector M24 terminal 31 (L). Transfer control unit harness connector E142 terminal 12 (W/G) and combination meter harness connector M24 terminal 33 (W/G). Transfer control unit harness connector E142 terminal 21 (BR) and combination meter harness connector M24 terminal 30 (BR). Continuity should exist. Also check harness for short to ground and short to power. OK or NG OK: GO TO 5 . NG: Repair or replace damaged parts.
  5. CHECK INDICATOR LAMP CIRCUIT Connect combination meter harness connector. Disconnect transfer control unit harness connector. Turn ignition switch "ON". Ground the following terminals using suitable wiring. Transfer control unit harness connector E142 terminal 2 (B/W) and ground. Transfer control unit harness connector E142 terminal 11 (L) and ground. Transfer control unit harness connector E142 terminal 12 (W/G) and ground. Transfer control unit harness connector E142 terminal 21 (BR) and ground. Do indicator lamps turn on? OK: GO TO 6 . NG: Replace combination meter. Refer to «COMBINATION METER»(ref-233304-S14186178792006052500000) .
  6. SYMPTOM CHECK Check again. OK or NG OK: Inspection End. NG: GO TO 7 .
  7. CHECK TRANSFER CONTROL UNIT Check transfer control unit input/output signal. Refer to «Transfer Control Unit Input/Output Signal Reference Values»(ref-233277-S01882369842006052500000) . OK or NG OK: Inspection End. NG: Check transfer control unit pin terminals for damage or loose connection with harness connector. If any items are damaged, repair or replace damaged parts.

4WD warning lamp does not turn ON when turning ignition switch to "ON".

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Scheme 42: DIAGNOSTIC PROCEDURE
Scheme 42: DIAGNOSTIC PROCEDURE

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Scheme 50
  1. CHECK TRANSFER CONTROL UNIT POWER SUPPLY CIRCUIT Turn ignition switch "OFF". (Stay for at least 5 seconds.) Connect transfer control unit harness connector. Check voltage between transfer control unit harness connector terminals and ground. Turn ignition switch "ON". (Do not start engine.) Check voltage between transfer control unit harness connector terminals and ground. OK or NG OK: GO TO 4 . NG: Check the following. If any items are damaged, repair or replace damaged parts. 10A fuses No. 26 located in fuse and fusible link box and No. 59 located in the fuse and relay box. Refer to «POWER SUPPLY ROUTING CIRCUIT»(ref-233318-S42666366662006052500000) . 20A fuse No. 53 located in the IPDM E/R. Refer to «POWER SUPPLY ROUTING CIRCUIT»(ref-233318-S42666366662006052500000) . Harness for short or open between battery and transfer control unit harness connector terminals 47. Harness for short or open between battery and transfer control unit harness connector terminal 29. Harness for short or open between battery and transfer shut off relay harness connector E69 terminal 1 (G), and 3 (G). Harness for short or open between transfer shut off relay harness connector E69 terminal 2 (SB) and transfer control unit harness connector terminal 30. Harness for short or open between transfer shut off relay harness connector E69 terminal 5 (Y/R) and transfer control unit harness connector terminals 16 (Y/R) and 22 (Y/R). Battery and ignition switch. Refer to «POWER SUPPLY ROUTING CIRCUIT»(ref-233318-S42666366662006052500000) . Transfer shut off relay. Refer to «COMPONENT INSPECTION»(ref-233277-S37070158002006052500000) .
  2. CHECK TRANSFER CONTROL UNIT GROUND CIRCUIT Turn ignition switch "OFF". (Stay for at least 5 seconds.) Disconnect transfer control unit harness connector. Check continuity between transfer control unit harness connector E142 terminals 3 (B), 6 (B), E143 terminal 45 (B) and ground. Continuity should exist. Also check harness for short to ground and short to power. OK or NG OK: GO TO 3 . NG: Repair open circuit or short to ground or short to power in harness or connectors.
  3. CHECK COMBINATION METER POWER SUPPLY CIRCUIT Turn ignition switch "OFF". (Stay for at least 5 seconds.) Disconnect transfer control unit harness connector. Check voltage between combination meter harness connector terminal and ground. TERMINALS VOLTAGE REFERENCE Connector Terminal (Wire color) Voltage (Approx.) M24 24 (O/L) - Ground 0V Turn ignition switch "ON". (Do not start engine.) Check voltage between combination meter harness connector terminal and ground. TERMINALS VOLTAGE REFERENCE Connector Terminal (Wire color) Voltage (Approx.) M24 24 (O/L) - Ground Battery voltage OK or NG OK: GO TO 4 . NG: Check the following. If any items are damaged, repair or replace damaged parts. 10A fuse No. 14 located in the fuse block (J/B). Refer to «POWER SUPPLY ROUTING CIRCUIT»(ref-233318-S42666366662006052500000) . Harness for short or open between battery and combination meter harness connector M24 terminal 24 (O/L). Ignition switch. Refer to «POWER SUPPLY ROUTING CIRCUIT»(ref-233318-S42666366662006052500000) .
  4. CHECK HARNESS BETWEEN TRANSFER CONTROL UNIT AND COMBINATION METER Turn ignition switch "OFF". (Stay for at least 5 seconds.) Disconnect transfer control unit harness connector and combination meter harness connector. Check continuity between the following terminals. Transfer control unit harness connector E142 terminal 5 (W/B) and combination meter harness connector M24 terminal 34 (W/B). Continuity should exist. Also check harness for short to ground and short to power. OK or NG OK: GO TO 5 . NG: Repair or replace damaged parts.
  5. CHECK INDICATOR LAMP CIRCUIT Connect combination meter harness connector. Disconnect transfer control unit harness connector. Turn ignition switch "ON". (Do not start engine.) Ground the following terminal using suitable wiring. Transfer control unit harness connector E142 terminal 5 (W/B) and ground. Does 4WD warning lamp turn on? OK: GO TO 6 . NG: Replace combination meter. Refer to «COMBINATION METER»(ref-233304-S14186178792006052500000) .
  6. SYMPTOM CHECK Check again. OK or NG OK: Inspection End. NG: GO TO 7 .
  7. CHECK TRANSFER CONTROL UNIT Check transfer control unit input/output signal. Refer to «Transfer Control Unit Input/Output Signal Reference Values»(ref-233277-S01882369842006052500000) . OK or NG OK: Inspection End. NG: Check transfer control unit pin terminals for damage or loose connection with harness connector. If any items are damaged, repair or replace damaged parts.

4WD shift indicator lamp or 4LO indicator lamp does not change when switching 4WD shift switch.

  1. CONFIRM THE SYMPTOM Confirm 4WD shift indicator lamp and 4LO indicator lamp turn on when ignition switch is turned to ON. Do 4WD shift indicator lamp and 4LO indicator lamp turn on? YES: GO TO 2 . NO: Go to «4WD SHIFT INDICATOR LAMP AND 4LO INDICATOR LAMP DO NOT TURN ON»(ref-233277-S14621682402006052500000) .
  2. CHECK SYSTEM FOR 4WD SHIFT SWITCH Perform trouble diagnosis for 4WD shift switch system. Refer to «4WD Shift Switch»(ref-233277-S08227293292006052500000) . OK or NG OK: GO TO 3 . NG: Repair or replace damaged parts.
  3. CHECK SYSTEM FOR WAIT DETECTION SWITCH Perform trouble diagnosis for wait detection switch system. Refer to «Wait Detection Switch»(ref-233277-S13242683522006052500000) . OK or NG OK: GO TO 4 . NG: Repair or replace damaged parts.
  4. CHECK SYSTEM FOR NEUTRAL-4LO SWITCH Perform trouble diagnosis for neutral-4LO switch system. Refer to «Neutral-4LO Switch»(ref-233277-S21110409722006052500000) . OK or NG OK: GO TO 5 . NG: Repair or replace damaged parts.
  5. CHECK SYSTEM FOR ATP SWITCH Perform trouble diagnosis for ATP switch system. Refer to «ATP Switch»(ref-233277-S08527592362006052500000) . OK or NG OK: GO TO 6 . NG: Repair or replace damaged parts.
  6. CHECK SYSTEM FOR 2-4 WD SOLENOID Perform trouble diagnosis for 2-4WD solenoid system. Refer to «2-4 WD Solenoid»(ref-233277-S22536554392006052500000) . OK or NG OK: GO TO 7 . NG: Repair or replace damaged parts.
  7. CHECK SYSTEM FOR TRANSFER CONTROL DEVICE Perform trouble diagnosis for transfer control device system. Refer to «Transfer Control Device»(ref-233277-S02897978512006052500000) . OK or NG OK: GO TO 8 . NG: Repair or replace damaged parts.
  8. CHECK SYSTEM FOR ACTUATOR MOTOR Perform trouble diagnosis for actuator motor system. Refer to «Actuator Motor»(ref-233277-S37829535272006052500000) . OK or NG OK: GO TO 9 . NG: Repair or replace damaged parts.
  9. CHECK SYSTEM FOR ACTUATOR POSITION SWITCH Perform trouble diagnosis for actuator position switch system. Refer to «Actuator Position Switch»(ref-233277-S21455209012006052500000) . OK or NG OK: GO TO 10 . NG: Repair or replace damaged parts.
  10. SYMPTOM CHECK Check again. OK or NG OK: Inspection End. NG: GO TO 11 .
  11. CHECK TRANSFER CONTROL UNIT Check transfer control unit input/output signal. Refer to «Transfer Control Unit Input/Output Signal Reference Values»(ref-233277-S01882369842006052500000) . OK or NG OK: GO TO 12 . NG: Check transfer control unit pin terminals for damage or loose connection with harness connector. If any items are damaged, repair or replace damaged parts.
  12. CHECK TRANSFER INNER PARTS Disassemble transfer assembly. Refer to «Disassembly and Assembly»(ref-233277-S06497793742006052500000) . Check transfer inner parts. OK or NG OK: Inspection End. NG: Repair or replace damaged parts.

ATP warning lamp turns ON when 4WD shift switch from "4H" to "4LO" or "4LO" to "4H" with A/T selector lever "N" to "P" position.

Scheme 51

Scheme 51: DIAGNOSTIC PROCEDURE
Scheme 51: DIAGNOSTIC PROCEDURE

Scheme 52

Scheme 52
Scheme 52

Scheme 53

Scheme 53
Scheme 53
  1. CHECK SYSTEM FOR CAN COMMUNICATION LINE Perform self-diagnosis. Refer to «Self-diagnostic Procedure»(ref-233277-S27103964002006052500000) . Do the self-diagnostic results indicate CAN communication? YES: Perform trouble diagnosis for CAN communication line. Refer to «CAN Communication Line»(ref-233277-S15216809542006052500000) . NO: GO TO 2 .
  2. CHECK SYSTEM FOR 4WD SHIFT SWITCH Perform trouble diagnosis for 4WD shift switch system. Refer to «4WD Shift Switch»(ref-233277-S08227293292006052500000) . OK or NG OK: GO TO 3 . NG: Repair or replace damaged parts.
  3. CHECK SYSTEM FOR PNP SWITCH SIGNAL Perform trouble diagnosis for PNP switch signal system. Refer to «PNP SWITCH SIGNAL (TCM)»(ref-233277-S11915013982006052500000) . OK or NG OK: GO TO 4 . NG: Repair or replace damaged parts.
  4. CHECK SYSTEM FOR ATP SWITCH Perform trouble diagnosis for ATP switch system. Refer to «ATP Switch»(ref-233277-S08527592362006052500000) . OK or NG OK: GO TO 5 . NG: Repair or replace damaged parts.
  5. CHECK HARNESS BETWEEN TRANSFER CONTROL UNIT AND COMBINATION METER Turn ignition switch "OFF". (Stay for at least 5 seconds.) Disconnect transfer control unit harness connector and combination meter harness connector. Check continuity between the following terminals. Transfer control unit harness connector E142 terminal 15 (L/B) and combination meter harness connector M24 terminal 6 (L/B). Continuity should exist. Transfer control unit harness connector E142 terminal 40 (L) and combination meter harness connector M24 terminal 7 (R/B). 40 to 7: Continuity should not exist. 7 to 40: Continuity should exist. Also check harness for short to ground and short to power. OK or NG OK: GO TO 6 . NG: Repair or replace damaged parts.
  6. CHECK ATP WARNING LAMP CIRCUIT A/T selector lever in "P" position. Connect combination meter harness connector and transfer control unit harness connector. Disconnect ATP switch harness connector. Ground the following terminal using suitable wiring. ATP switch harness connector F55 terminal 8 (L/Y) and ground. Turn ignition switch "ON". (Do not start engine.) Does indicator lamp turn on? OK: GO TO 7 . NG: Replace combination meter. Refer to «COMBINATION METER»(ref-233304-S14186178792006052500000) .
  7. SYMPTOM CHECK Check again. OK or NG OK: Inspection End. NG: GO TO 8 .
  8. CHECK TRANSFER CONTROL UNIT Check transfer control unit input/output signal. Refer to «Transfer Control Unit Input/Output Signal Reference Values»(ref-233277-S01882369842006052500000) . OK or NG OK: GO TO 9 . NG: Check transfer control unit pin terminals for damage or loose connection with harness connector. If any items are damaged, repair or replace damaged parts.
  9. CHECK TRANSFER INNER PARTS Disassemble transfer assembly. Refer to «Disassembly and Assembly»(ref-233277-S06497793742006052500000) . Check transfer inner parts. OK or NG OK: Inspection End. NG: Repair or replace damaged parts.
  1. CONFIRM THE SYMPTOM Set 4WD shift switch to "2WD". Move vehicle forward and backward, or drive straight increasing or decreasing under 20 km/h (12 MPH). Dose 4WD shift indicator lamp keep flashing? YES: GO TO 2 . NO: Inspection End.
  2. CHECK SYSTEM FOR WAIT DETECTION SWITCH Perform trouble diagnosis for wait detection switch system. Refer to «Wait Detection Switch»(ref-233277-S13242683522006052500000) . OK or NG OK: GO TO 3 . NG: Repair or replace damaged parts.
  3. CHECK SYSTEM FOR NEUTRAL-4LO SWITCH Perform trouble diagnosis for neutral-4LO switch system. Refer to «Neutral-4LO Switch»(ref-233277-S21110409722006052500000) . OK or NG OK: GO TO 4 . NG: Repair or replace damaged parts.
  4. SYMPTOM CHECK Check again. OK or NG OK: Inspection End. NG: GO TO 5 .
  5. CHECK TRANSFER CONTROL UNIT Check transfer control unit input/output signal. Refer to «Transfer Control Unit Input/Output Signal Reference Values»(ref-233277-S01882369842006052500000) . OK or NG OK: GO TO 6 . NG: Check transfer control unit pin terminals for damage or loose connection with harness connector. If any items are damaged, repair or replace damaged parts.
  6. CHECK TRANSFER INNER PARTS Disassemble transfer assembly. Refer to «Disassembly and Assembly»(ref-233277-S06497793742006052500000) . Check transfer inner parts. OK or NG OK: Inspection End. NG: Repair or replace damaged parts.

While driving, 4WD warning lamp flashes rapidly.

Note. Rapid flashing: 2 times/second

  1. CHECK TIRE Check the following. Tire pressure Wear condition Longitudinal tire size (There is no difference between longitudinal tires.) OK or NG OK: GO TO 2 . NG: Repair or replace damaged parts.
  2. CHECK 4WD WARNING LAMP Stop the vehicle and allow it to idle for a short period of time. Does flashing stop? YES: Inspection End. NO: GO TO 3 .
  3. CHECK TRANSFER FLUID TEMPERATURE Perform trouble diagnosis for transfer fluid temperature system. Refer to «Transfer Fluid Temperature»(ref-233277-S00114343972006052500000) OK or NG OK: GO TO 4 . NG: Repair or replace damaged parts.
  4. SYMPTOM CHECK Check again. OK or NG OK: Inspection End. NG: GO TO 5 .
  5. CHECK TRANSFER CONTROL UNIT Check transfer control unit input/output signal. Refer to «Transfer Control Unit Input/Output Signal Reference Values»(ref-233277-S01882369842006052500000) . OK or NG OK: Inspection End. NG: Check transfer control unit pin terminals for damage or loose connection with harness connector. If any items are damaged, repair or replace damaged parts.

While driving, 4WD warning lamp flashes slowly. (When continuing to flash until turning ignition switch OFF.)

Note. Slow flashing: 1 time/2 seconds

  1. CHECK TIRE Check the following. Tire pressure Wear condition Longitudinal tire size (There is no difference between longitudinal tires.) OK or NG OK: GO TO 2 . NG: Repair or replace damaged parts.
  2. CHECK TRANSFER FLUID TEMPERATURE Perform trouble diagnosis for transfer fluid temperature system. Refer to «Transfer Fluid Temperature»(ref-233277-S00114343972006052500000) OK or NG OK: GO TO 3 . NG: Repair or replace damaged parts.
  3. CHECK CLUTCH PRESSURE SWITCH Perform trouble diagnosis for clutch pressure switch system. Refer to «Clutch Pressure Switch»(ref-233277-S42476894042006052500000) . OK or NG OK: GO TO 4 . NG: Repair or replace damaged parts.
  4. SYMPTOM CHECK Check again. OK or NG OK: Inspection End. NG: GO TO 5 .
  5. CHECK TRANSFER CONTROL UNIT Check transfer control unit input/output signal. Refer to «Transfer Control Unit Input/Output Signal Reference Values»(ref-233277-S01882369842006052500000) . OK or NG OK: Inspection End. NG: Check transfer control unit pin terminals for damage or loose connection with harness connector. If any items are damaged, repair or replace damaged parts.

Heavy tight-corner braking symptom occurs when vehicle is driven in AUTO mode and steering wheel is turned fully to either side.

Note. Light tight-corner braking symptom may occur depending on driving conditions in AUTO mode. This is not a malfunction. Heavy tight-corner braking symptom occurs when vehicle is driven in the following conditions: 4WD shift switch is "4H" or "4LO", steering wheel is turned fully to either side.

  1. CHECK SYSTEM FOR CAN COMMUNICATION LINE Perform self-diagnosis. Refer to «Self-diagnostic Procedure»(ref-233277-S27103964002006052500000) . Is "CAN COMM CIRCUIT [U1000]" displayed? YES: Perform trouble diagnosis for CAN communication line. Refer to «CAN Communication Line»(ref-233277-S15216809542006052500000) . NO: GO TO 2 .
  2. CHECK SYSTEM FOR 4WD SHIFT SWITCH Perform trouble diagnosis for 4WD shift switch system. Refer to «4WD Shift Switch»(ref-233277-S08227293292006052500000) . OK or NG OK: GO TO 3 . NG: Repair or replace damaged parts.
  3. CHECK ACCELERATOR PEDAL POSITION SIGNAL CIRCUIT Perform self diagnosis for ECM. Refer to «EMISSION-RELATED DIAGNOSTIC INFORMATION»(ref-233258-S21115974152006052500000) . Is any malfunction detected by self-diagnosis? YES: Check the malfunctioning system. NO: GO TO 4 .
  4. CHECK SYSTEM FOR CLUTCH PRESSURE SOLENOID Perform trouble diagnosis for clutch pressure solenoid system. Refer to «Clutch Pressure Switch»(ref-233277-S42476894042006052500000) . OK or NG OK: GO TO 5 . NG: Repair or replace damaged parts.
  5. SYMPTOM CHECK Check again. OK or NG OK: Inspection End. NG: GO TO 6 .
  6. CHECK TRANSFER CONTROL UNIT Check transfer control unit input/output signal. Refer to «Transfer Control Unit Input/Output Signal Reference Values»(ref-233277-S01882369842006052500000) . OK or NG OK: GO TO 7 . NG: Check transfer control unit pin terminals for damage or loose connection with harness connector. If any items are damaged, repair or replace damaged parts.
  7. CHECK TRANSFER INNER PARTS Disassemble transfer assembly. Refer to «Disassembly and Assembly»(ref-233277-S06497793742006052500000) . Check transfer inner parts. OK or NG OK: Inspection End. NG: Repair or replace damaged parts.

The vehicle cannot be put into 4WD mode. (Hydraulic system failure)

  1. CHECK SYSTEM FOR 4WD SHIFT SWITCH Perform trouble diagnosis for 4WD shift switch system. Refer to «4WD Shift Switch»(ref-233277-S08227293292006052500000) . OK or NG OK: GO TO 2 . NG: Repair or replace damaged parts.
  2. CHECK SYSTEM FOR CLUTCH PRESSURE SWITCH Perform trouble diagnosis for clutch pressure switch system. Refer to «Clutch Pressure Switch»(ref-233277-S42476894042006052500000) . OK or NG OK: GO TO 3 . NG: Repair or replace damaged parts.
  3. SYMPTOM CHECK Check again. OK or NG OK: Inspection End. NG: GO TO 4 .
  4. CHECK TRANSFER CONTROL UNIT Check transfer control unit input/output signal. Refer to «Transfer Control Unit Input/Output Signal Reference Values»(ref-233277-S01882369842006052500000) . OK or NG OK: GO TO 5 . NG: Check transfer control unit pin terminals for damage or loose connection with harness connector. If any items are damaged, repair or replace damaged parts.
  5. CHECK TRANSFER INNER PARTS Disassemble transfer assembly. Refer to «Disassembly and Assembly»(ref-233277-S06497793742006052500000) . Check transfer inner parts. OK or NG OK: Inspection End. NG: Repair or replace damaged parts.

Scheme 54

Scheme 54: REMOVAL
Scheme 54: REMOVAL
  1. Set transfer state as 2WD when 4WD shift switch is at 2WD, or as AUTO when 4WD shift switch is at AUTO. CAUTION: When removing transfer control unit, transfer state must be at 2WD or AUTO.
  2. Turn the ignition switch OFF and disconnect negative battery terminal.
  3. Remove the glove box assembly. Refer to «LOWER INSTRUMENT PANEL RH AND GLOVE BOX»(ref-233304-S07097396922006052500000)
  4. Disconnect the two transfer control unit connectors.
  5. Remove the transfer control unit bolts.
  6. Remove the transfer control unit.

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