Step | Action | Value(s) | Yes | No |
|---|---|---|---|---|
1 | Was the Transfer Case Diagnostic System Check performed? | -- | Go to Step 2 | Go to Transfer Case Diagnostic System Check |
2 | Drive the vehicle in four wheel drive mode in order to determine if torque is being applied to the front wheels (the vehicle will display crow-hop or jerking during tight turns). Is torque being applied to the front wheels? | -- | Go to Step 3 | Go to Step 7 |
3 |
Does the Front Axle Switch status show the front axle Locked? | -- | Go to Step 12 | Go to Step 4 |
4 |
Does the Front Axle Switch status show the front axle Locked? | -- | Go to Step 13 | Go to Step 5 |
5 | Connect a J 39200 Digital Multimeter DMM between the front axle switch harness connector terminal A and ground. Is the voltage reading within the specified values? | 9-14 V | Go to Step 6 | Go to Step 11 |
6 |
Is the resistance reading within the specified values? | 0-5 ohms | Go to Step 12 | Go to Step 15 |
7 |
Does the Front Axle Actuator turn ON? | -- | Go to Step 12 | Go to Step 8 |
8 | Inspect the front drive axle clutch solenoid for proper vacuum supply. Is there proper vacuum supplied to the front drive axle clutch solenoid? | -- | Go to Step 9 | Go to Step 17 |
9 |
Does the front drive axle clutch solenoid engage the front axle? | -- | Go to Step 12 | Go to Step 10 |
10 |
Is the voltage within the values specified? | 9-14 V | Go to Step 14 | Go to Step 11 |
11 | Repair an open in CKT 241. Refer to Wiring Repairs in wiring systems. Is the repair complete? | -- | Go to Step 19 | -- |
12 | Replace the transfer case shift control module. Refer to Transfer Case Shift Control Module Replacement . Is the repair complete? | -- | Go to Step 19 | -- |
13 | Replace the front axle switch. Refer to front axle switch replacement. Is the repair complete? | -- | Go to Step 19 | -- |
14 | Connect a J 39200 DMM and measure the resistance between the front drive axle clutch solenoid harness connector terminal B and the transfer case shift control module harness connector C1 terminal F4. Is the resistance within the values specified? | 0-5ohms | Go to Step 18 | Go to Step 16 |
15 | Repair an open in CKT 1695. Refer to Wiring Repairs in wiring systems. Is the repair complete? | -- | Go to Step 19 | -- |
16 | Repair an open in CKT 1570. Refer to Wiring Repairs in wiring systems. Is the repair complete? | -- | Go to Step 19 | -- |
17 | Repair a vacuum leak between the engine and the front drive axle clutch solenoid. Is the repair complete? | -- | Go to Step 19 | -- |
18 | Replace the front drive axle clutch solenoid. Refer to front drive axle clutch solenoid replacement. Is the repair complete? | -- | Go to Step 19 | -- |
19 | Reconnect all ATC system components, make sure all the components are properly mounted. Have all the ATC components been reconnected and properly mounted? | -- | Go to Step 20 | -- |
20 | Clear all the ATC DTCs. Are all the ATC DTCs been cleared? | -- | Go to Transfer Case Diagnostic System Check | -- |
