Home ReviewsRefund
Home/Nissan/Frontier/Nissan Frontier D40 (2004-2010)/Repair manual/Transfer Case/TRANSFER CONTROL UNIT TERMINALS AND REFERENCE VALUE
Contents Wiring diagrams Section: Transfer Case All sections

TRANSFER CONTROL UNIT TERMINALS AND REFERENCE VALUE Nissan Frontier D40

Transfer Case 32 illustrations ~4083 words

TRANSFER CONTROL UNIT TERMINALS AND REFERENCE VALUE

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

TerminalWire colorItemConditionData (Approx.)
6BGroundAlways0V
18BGroundAlways0V
19RPower supply (Memory back-up)AlwaysBattery voltage
25W/GIgnition switch monitorIgnition switch: ONBattery voltage
Ignition switch: OFF0V
32BActuator motor groundAlways0V
40VTransfer shut off relayIgnition switch: ON0V
Ignition switch: OFF (5 seconds after ignition switch is turned OFF)Battery voltage
44YPower supplyIgnition switch: ONBattery voltage
Ignition switch: OFF (5 seconds after ignition switch is turned OFF)0V
45GRPower supplyIgnition switch: ONBattery voltage
Ignition switch: OFF (5 seconds after ignition switch is turned OFF)0V

TRANSFER CONTROL UNIT TERMINALS AND REFERENCE VALUE

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

Scheme 113

Scheme 113: DIAGNOSTIC PROCEDURE
Scheme 113: DIAGNOSTIC PROCEDURE

Scheme 114

Scheme 114
Scheme 114

Scheme 115

Scheme 115
Scheme 115
  1. CHECK POWER SUPPLY Turn ignition switch "OFF". (Stay for at least 5 seconds.) Disconnect transfer control unit harness connector. Check voltage between transfer control unit harness connector terminals and ground. CONNECTOR TERMINAL VOLTAGE CHART Connector Terminal Voltage (Approx.) M152 19-Ground Battery voltage 25-Ground 0V M153 40-Ground Battery voltage 44-Ground 0V 45-Ground see scheme 34: Checking Voltage Between Transfer Control Unit Connector Terminals And Ground Turn ignition switch "ON". (Do not start engine.) Check voltage between transfer control unit harness connector terminals and ground. CONNECTOR TERMINAL VOLTAGE CHART Connector Terminal Voltage (Approx.) M152 19-Ground Battery voltage 25-Ground M153 40-Ground 44-Ground 45-Ground see scheme 35: Checking Voltage Between Transfer Control Unit Connector Terminals And Ground OK or NG OK: GO TO 2. NG: Check the following. If any items are damaged, repair or replace damaged parts. 40A fusible link (No. j, located in the fuse and fusible link box). Refer to " «POWER SUPPLY ROUTING CIRCUIT»(ref-272337-S41287445542007111800000) ". 10A fuses [No. 21, located in the fuse block (J/B) and Nos. 57 and 58 located in the fuse and relay box]. Refer to " «POWER SUPPLY ROUTING CIRCUIT»(ref-272337-S41287445542007111800000) ". Harness for short or open between battery and transfer control unit harness connector M152 terminal 19. Harness for short or open between battery and transfer shut off relay 2 harness connector E157 terminal 1 and 3. Harness for short or open between battery and transfer shut off relay 1 harness connector E156 terminal 3. Harness for short or open between ignition switch and transfer control unit harness connector M152 terminal 25. Harness for short or open between ignition switch and transfer shut off relay 1 harness connector E156 terminal 1. Harness for short or open between transfer shut off relay 2 harness connector E157 terminal 5 and transfer control unit harness connector M153 terminals 44, 45. Harness for short or open between transfer shut off relay 1 harness connector E156 terminal 5 and transfer control unit harness connector M153 terminals 44, 45. Harness for short or open between transfer shut off relay 2 harness connector E157 terminal 2 and transfer control unit harness connector M153 terminal 40. Harness for open between transfer shut off relay 1 harness connector E156 terminal 2 and ground. Battery and ignition switch. Refer to " «POWER SUPPLY ROUTING CIRCUIT»(ref-272337-S41287445542007111800000) ". Transfer shut off relay 1, 2. Refer to " «COMPONENT INSPECTION»(ref-272365-S06213289312007111800000) ".
  2. CHECK GROUND CIRCUIT Turn ignition switch "OFF". Disconnect transfer control unit harness connector. Check continuity between transfer control unit harness connector M152 terminals 6 and 18, and M153 terminal 32 and ground. Continuity should exist. Also check harness for short to power. OK or NG OK: GO TO 3. NG: Repair open circuit or short to power in harness or connectors. see scheme 36: Checking Continuity Between Transfer Control Unit Connector E142 And E143 Terminal 32 And Ground
  3. CHECK TRANSFER CONTROL UNIT Check transfer control unit input/output signal. Refer to " «TRANSFER CONTROL UNIT INPUT/OUTPUT SIGNAL REFERENCE VALUES»(ref-272365-S33254852692007111800000) ". OK or NG OK: GO TO 4. 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.
  4. CHECK DTC Perform the self-diagnosis after driving vehicle. OK or NG OK: Inspection End. NG: Replace transfer control unit. Refer to " «REMOVAL AND INSTALLATION»(ref-272365-S11035519962007111800000) ".

Scheme 116

Scheme 116: COMPONENT INSPECTION
Scheme 116: COMPONENT INSPECTION
  1. Turn ignition switch "OFF". (Stay for at least 5 seconds.)
  2. Remove transfer shut off relay 1 and transfer shut off relay 2. Refer to " «LOCATION OF ELECTRICAL PARTS»(ref-272365-S40513327392007111800000) ".
  3. Apply 12V direct current between transfer shut off relay terminals 1 and 2.
  4. Check continuity between relay terminals 3 and 5. CONTINUITY CHART Condition Continuity 12V direct current supply between terminals 1 and 2 Yes OFF No
  5. If NG, replace the transfer shut off relay 1 or 2. Refer to " «LOCATION OF ELECTRICAL PARTS»(ref-272365-S40513327392007111800000) ". see scheme 37: Checking Continuity Between Relay Terminals 3 And 5

Data are reference value.

Monitored itemContentConditionDisplay value
4L POSI SW [ON/OFF]Condition of 4LO switchVehicle stopped Engine running For A/T models, A/T selector lever "N" position with brake pedal depressed. For M/T models, M/T shift lever neutral position with clutch and brake pedal depressed.4WD shift switch: 4LOON
Except the aboveOFF

CONSULT-II REFERENCE VALUE IN DATA MONITOR MODE

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

TerminalWire colorItemConditionData (Approx.)
24Y4LO switchVehicle stopped Engine running For A/T models, A/T selector lever "N" position with brake pedal depressed. For M/T models, M/T shift lever neutral position with clutch and brake pedal depressed.4WD shift switch: 4LO0V
Except the aboveBattery voltage

TRANSFER CONTROL UNIT TERMINALS AND REFERENCE VALUE

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

Scheme 117

Scheme 117: DIAGNOSTIC PROCEDURE
Scheme 117: DIAGNOSTIC PROCEDURE

Scheme 118

Scheme 118
Scheme 118

Scheme 119

Scheme 119
Scheme 119

Scheme 120

Scheme 120
Scheme 120

Scheme 121

Scheme 121
Scheme 121
  1. CHECK 4LO POSITION SWITCH SIGNAL With CONSULT-II Start engine. Select "DATA MONITOR" mode for "ALL MODE AWD/4WD" with CONSULT-II. Read out the value of "4L POSI SW". DISPLAY VALUE CHART Condition Display value Vehicle stopped Engine running For A/T models, A/T selector lever "N" position with brake pedal depressed. For M/T models, M/T shift lever neutral position with clutch and brake pedal depressed. 4WD shift switch: 4LO ON Except the above OFF see scheme 38: CONSULT II DATA MONITOR Screen Without CONSULT-II Start engine. Check voltage between transfer control unit harness connector terminal and ground. CONNECTOR TERMINAL VOLTAGE CHART Connector Terminal Condition Voltage (Approx.) M152 24-Ground Vehicle stopped Engine running For A/T models, A/T selector lever "N" position with brake pedal depressed. For M/T models, M/T shift lever neutral position with clutch and brake pedal depressed. 4WD shift switch: 4LO 0V Except the above Battery voltage see scheme 39: Checking Voltage Between Transfer Control Unit Connector Terminal And Ground OK or NG OK: GO TO 5. NG: GO TO 2.
  2. CHECK HARNESS BETWEEN TRANSFER CONTROL UNIT AND 4LO SWITCH Turn ignition switch "OFF". (Stay for at least 5 seconds.) Disconnect transfer control unit harness connector and the 4LO switch harness connector. Check continuity between transfer control unit harness connector M152 terminal 24 and 4LO switch harness connector F60 terminal 13. Continuity should exist. Also check harness for short to ground and short to power. OK or NG OK: GO TO 3. NG: Repair or replace damaged parts. see scheme 40: Checking Continuity Between Transfer Control Unit Connector E142 Terminal 24 And 4Lo Switch Connector F60 Terminal 13
  3. CHECK GROUND CIRCUIT Turn ignition switch "OFF". (Stay for at least 5 seconds.) Disconnect 4LO switch harness connector. Check continuity between 4LO switch harness connector F60 terminal 12 and ground. Continuity should exist. Also check harness for short to power. OK or NG OK: GO TO 4. NG: Repair open circuit or short to power in harness or connectors. see scheme 41: Checking Continuity Between 4LO Switch Connector F60 Terminal 12 And Ground
  4. CHECK 4LO SWITCH Turn ignition switch "OFF". (Stay for at least 5 seconds.) Disconnect 4LO switch harness connector. Remove 4LO switch. Refer to " «LOCATION OF ELECTRICAL PARTS»(ref-272365-S40513327392007111800000) ". Push and release 4LO switch and check continuity between 4LO switch terminals 12 and 13. CONTINUITY CHART Terminal Condition Continuity 12-13 Push 4LO switch Yes Release 4LO switch No OK or NG OK: GO TO 5. NG: Replace 4LO switch. Refer to " «LOCATION OF ELECTRICAL PARTS»(ref-272365-S40513327392007111800000) ". see scheme 42: Checking Continuity Between 4LO Switch Terminals 12 And 13
  5. CHECK TRANSFER CONTROL UNIT Check transfer control unit input/output signal. Refer to " «TRANSFER CONTROL UNIT INPUT/OUTPUT SIGNAL REFERENCE VALUES»(ref-272365-S33254852692007111800000) ". 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 DTC Perform the self-diagnosis, after driving the vehicle for a while. OK or NG OK: Inspection End. NG: Replace transfer control unit. Refer to " «REMOVAL AND INSTALLATION»(ref-272365-S11035519962007111800000) ".

Data are reference value.

Monitored item [Unit]ContentConditionDisplay value
2WD SWITCH [ON/OFF]Input condition from 4WD shift switch4WD shift switch: 2WDON
4WD shift switch: 4H and 4LOOFF
4H SWITCH [ON/OFF]Input condition from 4WD shift switch4WD shift switch: 4HON
4WD shift switch: 2WD and 4LOOFF
4L SWITCH [ON/OFF]Input condition from 4WD shift switch4WD shift switch: 4LOON
4WD shift switch: 2WD and 4HOFF
4WD MODE [2H/4H/4L]Control status of 4WD (Output condition of 4WD shift indicator lamp and 4LO indicator lamp)4WD shift switch (Engine running)2WD2H
4H4H
4LO4L

CONSULT-II REFERENCE VALUE IN DATA MONITOR MODE

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

TerminalWire colorItemConditionData (Approx.)
14G4WD shift switch (2WD)Ignition switch: ON4WD shift switch: 2WDBattery voltage
4WD shift switch: 4H and 4LO0V
15O4WD shift switch (4H)4WD shift switch: 4HBattery voltage
4WD shift switch: 2WD and 4LO0V
16W4WD shift switch (4LO)4WD shift switch: 4LOBattery voltage
4WD shift switch: 2WD and 4H0V

TRANSFER CONTROL UNIT TERMINALS AND REFERENCE VALUE

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

Scheme 122

Scheme 122: DIAGNOSTIC PROCEDURE
Scheme 122: DIAGNOSTIC PROCEDURE

Scheme 123

Scheme 123
Scheme 123

Scheme 124

Scheme 124
Scheme 124

Scheme 125

Scheme 125
Scheme 125

Scheme 126

Scheme 126
Scheme 126

Scheme 127

Scheme 127
Scheme 127
  1. CHECK 4WD SHIFT SWITCH SIGNAL With CONSULT-II Turn ignition switch "ON". Select "DATA MONITOR" mode for "ALL MODE AWD/4WD" with CONSULT-II. Read out ON/OFF switching action of the "2WD SWITCH", "4H SWITCH", "4L SWITCH" while operating 4WD shift switch. see scheme 44: CONSULT II Display DATA MONITOR Screen Without CONSULT-II Turn ignition switch "ON". Check voltage between transfer control unit harness connector terminals and ground. CONNECTOR TERMINAL VOLTAGE CHART Connector Terminal Condition Voltage (Approx.) M152 14-Ground 4WD shift switch: 2WD Battery voltage 4WD shift switch: 4H and 4LO 0V 15-Ground 4WD shift switch: 4H Battery voltage 4WD shift switch: 2WD and 4LO 0V 16-Ground 4WD shift switch: 4LO Battery voltage 4WD shift switch: 2WD and 4H 0V see scheme 45: Checking Voltage Between Transfer Control Unit Connector Terminals And Ground OK or NG OK: GO TO 5. NG: GO TO 2.
  2. CHECK 4WD SHIFT SWITCH POWER SUPPLY CIRCUIT Turn ignition switch "OFF". (Stay for at least 5 seconds.) Disconnect 4WD shift switch harness connector. Check voltage between 4WD shift switch harness connector terminal 1 and ground. CONNECTOR TERMINAL VOLTAGE CHART Connector Terminal Voltage (Approx.) M141 1-Ground 0V see scheme 46: Checking Voltage Between 4WD Shift Switch Connector Terminal 1 And Ground Turn ignition switch "ON". (Do not start engine.) Check voltage between 4WD shift switch harness connector terminal 1 and ground. CONNECTOR TERMINAL VOLTAGE CHART Connector Terminal Voltage (Approx.) M141 1-Ground Battery voltage OK or NG OK: GO TO 3. NG: Check harness for short or open between 4WD shift switch harness connector M141 terminal 1 and transfer shut off relay 2 harness connector E157 terminal 5 and 10A fuse (No. 58 located in the fuse and relay box). If any items are damaged, repair or replace damaged parts. Perform trouble diagnosis for power supply circuit. Refer to " «POWER SUPPLY CIRCUIT FOR TRANSFER CONTROL UNIT»(ref-272365-S09519164472007111800000) ". (Scheme 113): Checking Voltage Between 4WD Shift Switch Connector Terminal 1 And Ground
  3. CHECK HARNESS BETWEEN 4WD SHIFT SWITCH AND TRANSFER CONTROL UNIT Turn ignition switch "OFF". (Stay for at least 5 seconds.) Disconnect transfer control unit harness connector and the 4WD shift switch harness connector. Check continuity between the following terminals. Transfer control unit harness connector M152 terminal 14 and 4WD shift switch harness connector M141 terminal 3. Transfer control unit harness connector M152 terminal 15 and 4WD shift switch harness connector M141 terminal 5. Transfer control unit harness connector M152 terminal 16 and 4WD shift switch harness connector M141 terminal 6. Continuity should exist. Also check harness for short to ground and short to power. OK or NG OK: GO TO 4. NG: Repair or replace damaged parts. (Scheme 114): Checking Continuity Between 4WD Shift Switch And Transfer Control Unit Connector Terminals
  4. CHECK 4WD SHIFT SWITCH Turn ignition switch "OFF". (Stay for at least 5 seconds.) Remove 4WD shift switch harness connector. Operate 4WD shift switch and check continuity between 4WD shift switch terminals. TERMINAL CONTINUITY CHART Terminal Condition Continuity 1-3 4WD shift switch: 2WD Yes 4WD shift switch: 4H and 4LO No 1-5 4WD shift switch: 4H Yes 4WD shift switch: 2WD and 4LO No 1-6 4WD shift switch: 4LO Yes 4WD shift switch: 2WD and 4H No OK or NG OK: GO TO 5. NG: Replace 4WD shift switch. (Scheme 115): Checking Continuity Between 4WD Shift Switch Terminals
  5. CHECK TRANSFER CONTROL UNIT Check transfer control unit input/output signal. Refer to " «TRANSFER CONTROL UNIT INPUT/OUTPUT SIGNAL REFERENCE VALUES»(ref-272365-S33254852692007111800000) ". 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 DTC Perform the self-diagnosis, after driving a vehicle for a while. OK or NG OK: Inspection End. NG: Replace transfer control unit. Refer to " «TRANSFER CONTROL UNIT»(ref-272365-S30896689232007111800000) ".

Data are reference value.

Monitored itemContentConditionDisplay value
WAIT DETCT SW [ON/OFF]Condition of wait detection switchVehicle stopped Engine running For A/T models, A/T selector lever "N" position with brake pedal depressed. For M/T models, M/T shift lever neutral position with clutch and brake pedal depressed.4WD shift switch: 4H and 4LOON
4WD shift switch: 2WDOFF

CONSULT-II REFERENCE VALUE IN DATA MONITOR MODE

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

TerminalWire colorItemConditionData (Approx.)
17OWait detection switchVehicle stopped Engine running For A/T models, A/T selector lever "N" position with brake pedal depressed. For M/T models, M/T shift lever neutral position with clutch and brake pedal depressed.4WD shift switch: 4H and 4LO0V
4WD shift switch: 2WDBattery voltage

TRANSFER CONTROL UNIT TERMINALS AND REFERENCE VALUE

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

Scheme 128

Scheme 128: DIAGNOSTIC PROCEDURE
Scheme 128: DIAGNOSTIC PROCEDURE

Scheme 129

Scheme 129
Scheme 129

Scheme 130

Scheme 130
Scheme 130

Scheme 131

Scheme 131
Scheme 131

Scheme 132

Scheme 132
Scheme 132
  1. CHECK WAIT DETECTION SWITCH SIGNAL With CONSULT-II Start engine. Select "DATA MONITOR" mode for "ALL MODE AWD/4WD" with CONSULT-II. Read out the value of "WAIT DETCT SW". DISPLAY VALUE CHART Condition Display value Vehicle stopped Engine running For A/T models, A/T selector lever "N" position with brake pedal depressed. For M/T models, M/T shift lever neutral position with clutch and brake pedal depressed. 4WD shift switch: 4H and 4LO ON 4WD shift switch: 2WD OFF (Scheme 117): CONSULT II DATA MONITOR Screen Without CONSULT-II Start engine. Check voltage between transfer control unit harness connector terminal and ground. CONNECTOR TERMINAL VOLTAGE CHART Connector Terminal Condition Voltage (Approx.) M152 17-Ground Vehicle stopped Engine running For A/T models, A/T selector lever "N" position with brake pedal depressed. For M/T models, M/T shift lever neutral position with clutch and brake pedal depressed. 4WD shift switch: 4H and 4LO 0V 4WD shift switch: 2WD Battery voltage (Scheme 118): Checking Voltage Between Transfer Control Unit Connector Terminal And Ground OK or NG OK: GO TO 5. NG: GO TO 2.
  2. CHECK HARNESS BETWEEN TRANSFER CONTROL UNIT AND WAIT DETECTION SWITCH Turn ignition switch "OFF". (Stay for at least 5 seconds.) Disconnect transfer control unit harness connector and the wait detection switch harness connector. Check continuity between transfer control unit harness connector M152 terminal 17 and wait detection switch harness connector F59 terminal 10. Continuity should exist. Also check harness for short to ground and short to power. OK or NG OK: GO TO 3. NG: Repair or replace damaged parts. (Scheme 119): Checking Continuity Between Transfer Control Unit And Wait Detection Switch Terminals
  3. CHECK GROUND CIRCUIT Turn ignition switch "OFF". (Stay for at least 5 seconds.) Disconnect wait detection switch harness connector. Check continuity between wait detection switch harness connector F59 terminal 11 and ground. Continuity should exist. Also check harness for short to power. OK or NG OK: GO TO 4. NG: Repair open circuit or short to power in harness or connectors. (Scheme 120): Checking Continuity Between Wait Detection Switch Harness Connector F59 Terminal 11 And Ground
  4. CHECK WAIT DETECTION SWITCH Turn ignition switch "OFF". (Stay for at least 5 seconds.) Disconnect wait detection switch harness connector. Remove wait detection switch. Refer to " «LOCATION OF ELECTRICAL PARTS»(ref-272365-S40513327392007111800000) ". Push and release wait detection switch and check continuity between wait detection switch terminals 10 and 11. CONTINUITY CHART Terminal Condition Continuity 10-11 Push wait detection switch Yes Release wait detection switch No OK or NG OK: GO TO 5. NG: Replace wait detection switch. Refer to " «LOCATION OF ELECTRICAL PARTS»(ref-272365-S40513327392007111800000) ". (Scheme 121): Checking Continuity Between Wait Detection Switch Terminals 10 And 11
  5. CHECK TRANSFER CONTROL UNIT Check transfer control unit input/output signal. Refer to " «TRANSFER CONTROL UNIT INPUT/OUTPUT SIGNAL REFERENCE VALUES»(ref-272365-S33254852692007111800000) ". 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 DTC Perform the self-diagnosis, after driving a vehicle for a while. OK or NG OK: Inspection End. NG: Replace transfer control unit. Refer to " «REMOVAL AND INSTALLATION»(ref-272365-S11035519962007111800000) ".

Data are reference value.

Monitored itemContentConditionDisplay value
SHIFT ACT 1 [ON/OFF]Output condition to actuator motor (clockwise)Vehicle stopped Engine running For A/T models, A/T selector lever "N" position with brake pedal depressed. For M/T models, M/T shift lever neutral position with clutch and brake pedal depressed.4WD shift switch: 2WD to 4H or 4H to 4LO or 2WD to 4LOON
Except the aboveOFF
SHIFT AC MON1 [ON/OFF]Check signal for transfer control unit signal outputVehicle stopped Engine running For A/T models, A/T selector lever "N" position with brake pedal depressed. For M/T models, M/T shift lever neutral position with clutch and brake pedal depressed.4WD shift switch: 2WD to 4H or 4H to 4LO or 2WD to 4LOON
Except the aboveOFF
SHIFT ACT 2 [ON/OFF]Output condition to actuator motor (counterclockwise)Vehicle stopped Engine running For A/T models, A/T selector lever "N" position with brake pedal depressed. For M/T models, M/T shift lever neutral position with clutch and brake pedal depressed.4WD shift switch: 4LO to 4H or 4H to 2WD or 4LO to 2WDON
Except the aboveOFF
SHIFT AC MON2 [ON/OFF]Check signal for transfer control unit signal outputVehicle stopped Engine running For A/T models, A/T selector lever "N" position with brake pedal depressed. For M/T models, M/T shift lever neutral position with clutch and brake pedal depressed.4WD shift switch: 4LO to 4H or 4H to 2WD or 4LO to 2WDON
Except the aboveOFF

CONSULT-II REFERENCE VALUE IN DATA MONITOR MODE

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

TerminalWire colorItemConditionData (Approx.)
27LActuator motor power supplyIgnition switch: ONBattery voltage
Ignition switch: OFF (5 seconds after ignition switch is turned OFF)0V
28SBActuator motor (+)Vehicle stopped Engine running For A/T models, A/T selector lever "N" position with brake pedal depressed. For M/T models, M/T shift lever neutral position with clutch and brake pedal depressed.When 4WD shift switch is operated (while actuator motor is operating)Battery voltage
When 4WD shift switch is not operated0V
31GActuator motor (-)Always0V
42LGTransfer shift high relayVehicle stopped Engine running For A/T models, A/T selector lever "N" position with brake pedal depressed. For M/T models, M/T shift lever neutral position with clutch and brake pedal depressed.4WD shift switch: 2WD to 4H or 4H to 4LO or 2WD to 4LO0V
Except the aboveBattery voltage
47OTransfer shift high relay monitor4WD shift switch: 2WD to 4H or 4H to 4LO or 2WD to 4LOBattery voltage --> 0V
Except the above0V
48RTransfer shift low relay monitor4WD shift switch: 4LO to 4H or 4H to 2WD or 4LO to 2WDBattery voltage --> 0V
Except the above0V
50YTransfer shift low relay4WD shift switch: 4LO to 4H or 4H to 2WD or 4LO to 2WD0V
Except the aboveBattery voltage

TRANSFER CONTROL UNIT TERMINALS AND REFERENCE VALUE

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

Scheme 133

Scheme 133: DIAGNOSTIC PROCEDURE
Scheme 133: DIAGNOSTIC PROCEDURE

Scheme 134

Scheme 134
Scheme 134

Scheme 135

Scheme 135
Scheme 135

Scheme 136

Scheme 136
Scheme 136

Scheme 137

Scheme 137
Scheme 137

Scheme 138

Scheme 138
Scheme 138

Scheme 139

Scheme 139
Scheme 139

Scheme 140

Scheme 140
Scheme 140

Scheme 141

Scheme 141
Scheme 141

Scheme 142

Scheme 142
Scheme 142

Scheme 143

Scheme 143
Scheme 143

Scheme 144

Scheme 144
Scheme 144
  1. CHECK ACTUATOR MOTOR SIGNAL With CONSULT-II Start engine. Select "DATA MONITOR" mode for "ALL MODE AWD/4WD" with CONSULT-II. Read out the value of "SHIFT ACT1", "SHIFT AC MON1", "SHIFT ACT2", "SHIFT AC MON2". DISPLAY VALUE CHART Monitored item Condition Display value SHIFT ACT1 Vehicle stopped Engine running For A/T models, A/T selector lever "N" position with brake pedal depressed. For M/T models, M/T shift lever neutral position with clutch and brake pedal depressed. 4WD shift switch: 2WD to 4H or 4H to 4LO or 2WD to 4LO ON Except the above OFF SHIFT AC MON1 4WD shift switch: 2WD to 4H or 4H to 4LO or 2WD to 4LO ON Except the above OFF SHIFT ACT2 4WD shift switch: 4LO to 4H or 4H to 2WD or 4LO to 2WD ON Except the above OFF SHIFT AC MON2 4WD shift switch: 4LO to 4H or 4H to 2WD or 4LO to 2WD ON Except the above OFF (Scheme 122): CONSULT II DATA MONITOR Screen Without CONSULT-II Start engine. Depress brake pedal and stop vehicle. For A/T models, set A/T selector lever to "N" position. For M/T models set M/T shift lever to neutral. Check voltage between transfer control unit harness connector terminal and ground. (Scheme 123): Checking Voltage Between Transfer Control Unit Connector Terminal And Ground CONNECTOR TERMINAL VOLTAGE CHART Connector Terminal Condition Voltage (Approx.) M153 28-Ground When 4WD shift switch is operated (While actuator motor is operating.) Battery voltage --> 0V When 4WD shift switch is not operated 0V 31-Ground Always 0V 42-Ground Vehicle stopped Engine running For A/T models, A/T selector lever "N" position with brake pedal depressed. For M/T models, M/T shift lever neutral position with clutch and brake pedal depressed. 4WD shift switch: 2WD to 4H or 4H to 4LO or 2WD to 4LO 0V Except the above Battery voltage M153 47-Ground 4WD shift switch: 2WD to 4H or 4H to 4LO or 2WD to 4LO Battery voltage --> 0V Except the above 0V 48-Ground 4WD shift switch: 4LO to 4H or 4H to 2WD or 4LO to 2WD Battery voltage --> 0V Except the above 0V 50-Ground 4WD shift switch: 4LO to 4H or 4H to 2WD or 4LO to 2WD 0V Except the above Battery voltage OK or NG OK: GO TO 9. NG: GO TO 2.
  2. CHECK ACTUATOR MOTOR POWER SUPPLY CIRCUIT Turn ignition switch "OFF". (Stay for at least 5 seconds.) Disconnect transfer control unit harness connector. Check voltage between transfer control unit harness connector M153 terminal 27 and ground. CONNECTOR TERMINAL VOLTAGE CHART Connector Terminal Voltage (Approx.) M153 27-Ground 0V (Scheme 124): Checking Voltage Between Transfer Control Unit Connector Terminal 27 And Ground Turn ignition switch "ON". Check voltage between transfer control unit harness connector M153 terminal 27 and ground. CONNECTOR TERMINAL VOLTAGE CHART Connector Terminal Voltage (Approx.) M153 27-Ground Battery voltage OK or NG OK: GO TO 3. NG: Check harness for short or open between transfer control unit harness connector M153 terminal 27 and transfer shut off relay 2 harness connector E157 terminal 5 and 10A fuse (No. 57, located in the fuse and relay box). If any items are damaged, repair or replace damaged parts. Perform trouble diagnosis for power supply circuit. Refer to " «POWER SUPPLY CIRCUIT FOR TRANSFER CONTROL UNIT»(ref-272365-S09519164472007111800000) ". (Scheme 125): Checking Voltage Between Transfer Control Unit Connector Terminal 27 And Ground
  3. CHECK TRANSFER RELAY POWER SUPPLY CIRCUIT Turn ignition switch "OFF". (Stay for at least 5 seconds.) Remove transfer shift high relay and transfer shift low relay. Refer to " «LOCATION OF ELECTRICAL PARTS»(ref-272365-S40513327392007111800000) ". Check voltage between transfer control unit harness connector terminal and ground. CONNECTOR TERMINAL VOLTAGE CHART Connector Terminal Voltage (Approx.) E46 2-Ground 0V E47 2-Ground 0V (Scheme 126): Checking Voltage Between Transfer Control Unit Connector Terminal And Ground Turn ignition switch "ON". (Do not start engine.) Check voltage between transfer control unit harness connector terminal and ground. CONNECTOR TERMINAL VOLTAGE CHART Connector Terminal Voltage (Approx.) E46 2-Ground Battery voltage E47 2-Ground Battery voltage OK or NG OK: GO TO 4. NG: Check the following. If any items are damaged, repair or replace damaged parts. Harness for short or open between transfer control unit harness connector terminal 27 and transfer shift high relay harness connector E46 terminal 2. Harness for short or open between transfer control unit harness connector terminal 27 and transfer shift low relay harness connector terminal E47 terminal 2. (Scheme 127): Checking Voltage Between Transfer Control Unit Connector Terminal And Ground
  4. CHECK TRANSFER RELAY Turn ignition switch "OFF". (Stay for at least 5 seconds.) Remove transfer shift high relay and transfer shift low relay. Apply 12V direct current between transfer shift high and low relay terminals 1 and 2. Check continuity between relay terminals 3 and 4, 3 and 5. CONTINUITY CHART Terminal Condition Continuity 3-4 12V direct current supply between terminals 1 and 2 No OFF Yes 3-5 12V direct current supply between terminals 1 and 2 Yes OFF No OK or NG OK: GO TO 5. NG: Replace the transfer shift high or low relay. see scheme 63: Checking Continuity Between Relay Terminals 3 And 4, 3 And 5
  5. CHECK (1): HARNESS BETWEEN TRANSFER CONTROL UNIT AND TRANSFER SHIFT RELAY Turn ignition switch "OFF". (Stay for at least 5 seconds.) Disconnect transfer control unit harness connector. Remove transfer shift high relay and transfer shift low relay. Check continuity between the following terminals. Transfer control unit harness connector M153 terminal 42 and transfer shift high relay harness connector E46 terminal 1. Transfer control unit harness connector M153 terminal 50 and transfer shift low relay harness connector E47 terminal 1. 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. (Scheme 128): Checking Continuity Between Transfer Control Unit And Transfer Shift Relay Connector Terminals
  6. CHECK (2): HARNESS BETWEEN TRANSFER CONTROL UNIT AND TRANSFER SHIFT RELAY Turn ignition switch "OFF". (Stay for at least 5 seconds.) Disconnect transfer control unit harness connector. Remove transfer shift high relay and transfer shift low relay. Check continuity between the following terminals. Transfer control unit harness connector M153 terminal 28 and transfer shift high relay harness connector E46 terminal 5. Transfer control unit harness connector M153 terminal 28 and transfer shift low relay harness connector E47 terminal 5. Transfer control unit harness connector M153 terminal 31 and transfer shift high relay harness connector E46 terminal 4. Transfer control unit harness connector M153 terminal 31 and transfer shift low relay harness connector E47 terminal 4. Continuity should exist. Also check harness for short to ground and short to power. OK or NG OK: GO TO 7. NG: Repair or replace damaged parts. (Scheme 129): Checking Continuity Between Transfer Control Unit And Transfer Shift Relay Connector Terminals
  7. CHECK ACTUATOR MOTOR OPERATION CIRCUIT Turn ignition switch "OFF". (Stay for at least 5 seconds.) Disconnect transfer control unit harness connector and the transfer control device (actuator motor) harness connector. Check continuity between the following terminals. Transfer control unit harness connector M153 terminal 47 and transfer control device (actuator motor) harness connector F58 terminal 23. Transfer control unit harness connector M153 terminal 48 and transfer control device (actuator motor) harness connector F58 terminal 24. (Scheme 130): Checking Actuator Motor Operation Circuit Transfer control device (actuator motor) harness connector F58 terminal 24 and transfer shift high relay harness connector E46 terminal 3. Transfer control device (actuator motor) harness connector F58 terminal 23 and transfer shift low relay harness connector E47 terminal 3. Continuity should exist. Also check harness for short to ground and short to power. OK or NG OK: GO TO 8. NG: Repair or replace damaged parts. (Scheme 131): Checking Actuator Motor Operation Circuit
  8. CHECK ACTUATOR MOTOR Remove transfer control device. Refer to " «REMOVAL AND INSTALLATION»(ref-272365-S11035519962007111800000) ". Check operation by applying battery voltage to transfer control device (actuator motor) terminals 23 and 24. CAUTION: Be careful not to overheat the harness. ACTUATOR MOTOR SPECIFICATION Terminal Actuator motor 24 (Battery voltage) - 23 (Ground) Clockwise rotate 23 (Battery voltage) - 24 (Ground) Counterclockwise rotate Does actuator motor rotate? YES: GO TO 9. NO: Replace transfer control device (actuator motor). Refer to " «REMOVAL AND INSTALLATION»(ref-272365-S10466604352007111800000) ". (Scheme 132): Applying Battery Voltage To Transfer Control Device (Actuator Motor) Terminals 23 And 24
  9. CHECK TRANSFER CONTROL UNIT Check transfer control unit input/output signal. Refer to " «TRANSFER CONTROL UNIT INPUT/OUTPUT SIGNAL REFERENCE VALUES»(ref-272365-S33254852692007111800000) ". OK or NG OK: GO TO 10. 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.
  10. CHECK DTC Perform the self-diagnosis, after driving a vehicle for a while. OK or NG OK: Inspection End. NG: Replace transfer control unit. Refer to " «TRANSFER CONTROL UNIT»(ref-272365-S30896689232007111800000) ".
  1. Remove transfer control device. Refer to " «REMOVAL AND INSTALLATION»(ref-272365-S10466604352007111800000) ".
  2. Check operation by applying battery voltage to transfer control device (actuator motor) terminals 23 and 24. CAUTION: Be careful not to overheat the harness. ACTUATOR MOTOR SPECIFICATION Terminal Actuator motor 24 (Battery voltage) - 23 (Ground) Clockwise rotate 23 (Battery voltage) - 24 (Ground) Counterclockwise rotate
  3. If NG, replace transfer control device (actuator motor). Refer to " «REMOVAL AND INSTALLATION»(ref-272365-S10466604352007111800000) ". see scheme 69: Applying Battery Voltage To Transfer Control Device (Actuator Motor) Terminals 23 And 24