Circuit/System Testing

Ignition OFF, disconnect the harness connector at the M32 Differential Clutch Pump, Ignition ON/Vehicle in Service Mode.
Test for 3.3 - 5.3 V AC between the control circuit terminal 8 and ground.
- If less than 3.3 V AC
1. Ignition OFF, disconnect the X2 harness connector at the K47 Rear Differential Clutch Control Module.
2. Test for infinite resistance between the control circuit terminal 8 and ground.
  - If less than infinite resistance, repair the short to ground on the circuit.
  - Go to next step: If infinite resistance
3. Test for less than 2 Ω in the control circuit terminal 8 end to end.
  - If 2 Ω or greater, repair the open/high resistance in the circuit.
  - If less than 2 Ω, replace the K47 Rear Differential Clutch Control Module.
- If greater than 5.3 V AC
1. Ignition OFF, disconnect the X2 harness connector at the K47 Rear Differential Clutch Control Module, Ignition ON/Vehicle in Service Mode.
2. Test for less than 1 V between the control circuit terminal 8 and ground.
  - If 1 V or greater, repair the short to voltage on the circuit.
  - If less than 1 V, replace the K47 Rear Differential Clutch Control Module.
- Go to next step: If between 3.3 - 5.3 V AC
Test for 1.2 - 3.7 V between the control circuit terminal 7 and ground.
- If less than 1.2 V
1. Ignition OFF, disconnect the X2 harness connector at the K47 Rear Differential Clutch Control Module.
2. Test for infinite resistance between the control circuit terminal 7 and ground.
  - If less than infinite resistance, repair the short to ground on the circuit.
  - Go to next step: If infinite resistance
3. Test for less than 2 Ω in the control circuit terminal 7 end to end.
  - If 2 Ω or greater, repair the open/high resistance in the circuit.
  - If less than 2 Ω, replace the K47 Rear Differential Clutch Control Module.
- If greater than 3.7 V
1. Ignition OFF, disconnect the X2 harness connector at the K47 Rear Differential Clutch Control Module, Ignition ON/Vehicle in Service Mode.
2. Test for less than 1 V between the control circuit terminal 7 and ground.
  - If 1 V or greater, repair the short to voltage on the circuit.
  - If less than 1 V, replace the K47 Rear Differential Clutch Control Module.
- Go to next step: If between 1.2 - 3.7 V
Test for 6.4 - 6.8 V between the control circuit terminal 6 and ground.
- If less than 6.4 V
1. Ignition OFF, disconnect the X2 harness connector at the K47 Rear Differential Clutch Control Module.
2. Test for infinite resistance between the control circuit terminal 6 and ground.
  - If less than infinite resistance, repair the short to ground on the circuit.
  - Go to next step: If infinite resistance
3. Test for less than 2 Ω in the control circuit terminal 6 end to end.
  - If 2 Ω or greater, repair the open/high resistance in the circuit.
  - If less than 2 Ω, replace the K47 Rear Differential Clutch Control Module.
- If greater than 6.8 V
1. Ignition OFF, disconnect the X2 harness connector at the K47 Rear Differential Clutch Control Module, Ignition ON/Vehicle in Service Mode.
2. Test for less than 1 V between the control circuit terminal 6 and ground.
  - If 1 V or greater, repair the short to voltage on the circuit.
  - If less than 1 V, replace the K47 Rear Differential Clutch Control Module.
- Go to next step: If between 6.4 - 6.8 V
Ignition OFF, disconnect the scan tool and disconnect the harness connector at the M32 Differential Clutch Pump.
Test for greater than 25 Ω between the following control circuit terminals listed below.
- Control Circuit Terminal 6
- Control Circuit Terminal 7
- Control Circuit Terminal 8
- If 25 Ω or less
1. Disconnect the X2 harness connector at the K47 Rear Differential Clutch Control Module.
2. Test for infinite resistance between the three control circuits.
  - If less than infinite resistance, repair the short between the three circuits.
  - If infinite resistance, replace the K47 Rear Differential Clutch Control Module.
- Go to next step: If greater than 25 Ω
Test or replace the M32 Differential Clutch Pump.
Operate the vehicle under the conditions for setting the DTC, the DTC should not set.
- If the DTC sets
  Replace the K47 Rear Differential Clutch Control Module.
- Go to next step: If the DTC does not set
All OK.