Pinpoint Test C: DTC P188B
WARNING: This page is about a different variant/trim than selected.
- C1 CHECK THE ATC SOLENOID CIRCUITS
- Disconnect: AWD Relay Module C4379.
- Inspect the connectors for damaged or pushed out terminals, corrosion, loose wires and missing or damaged seals.
- Ignition ON.
- Measure the resistance
between.
Positive Lead Negative Lead Pin Circuit Pin Circuit C4379-5 CCF21 (VT/WH) C4379-8 RCF21 (WH/VT) - Is the resistance between 1 and 5 ohms?
- Yes : INSTALL a new AWD relay module. REFER to ALL WHEEL DRIVE (AWD) RELAY MODULE .
- No : If the resistance is less than 1 ohm, repair the circuit for a short to ground. If the resistance is greater than 5 ohms, GO to C2
- C2 CHECK THE ATC SOLENOID CIRCUITS FOR AN OPEN
- Disconnect: ATC Solenoid C4347.
- Inspect the connectors for damaged or pushed out terminals, corrosion, loose wires and missing or damaged seals.
- Measure the resistance
between.
Positive Lead Negative Lead Pin Circuit Pin Circuit C4379-5 CCF21 (VT/WH) C4347-1 CCF21 (VT/WH) C4379-8 RCF21 (WH/VT) C4347-2 RCF21 (WH/VT) - Is the resistance less than 5 ohms?
- Yes : GO to C3.
- No : REPAIR the circuit.
- C3 CHECK THE ATC SOLENOID CIRCUITS FOR A SHORT TO GROUND
- Measure the resistance
between.
Positive Lead Negative Lead Pin Circuit Pin Circuit C4379-5 CCF21 (VT/WH) - Ground C4379-8 RCF21 (WH/VT - Ground - Is the resistance greater than 10, 000 ohms?
- Yes : GO to C4.
- No : REPAIR the circuit.
- Measure the resistance
between.
- C4 CHECK THE ATC SOLENOID CIRCUITS FOR A SHORT TOGETHER
- Measure the resistance
between.
Positive Lead Negative Lead Pin Circuit Pin Circuit C4379-5 CCF21 (VT/WH) C4379-8 RCF21 (WH/VunT - Is the resistance greater than 10, 000 ohms?
- Yes : GO to C5.
- No : REPAIR the circuit.
- Measure the resistance
between.
- C5 CHECK THE ATC SOLENOID CIRCUITS FOR A SHORT TO POWER
- Ignition ON.
- Measure the voltage
between.
Positive Lead Negative Lead Pin Circuit Pin Circuit C4379-5 CCF21 (VT/WH) - Ground C4379-8 RCF21 (WH/VT - Ground - Is any voltage present?
- Yes : REPAIR the circuit.
- No : GO to C6.
- C6 CHECK THE ATC SOLENOID
- Measure the component side resistance
between.
Positive Lead Negative Lead Pin Circuit Pin Circuit C4347-1 - C4347-2 - - Is the resistance between 1 to 5 ohms?
- Yes : INSTALL a new PCM. REFER to ENGINE CONTROLS - ELECTRONIC ENGINE CONTROLS . PROGRAM the PCM with the latest calibration. PERFORM the Solenoid Body Strategy Data Download procedure and PERFORM the Solenoid Body Strategy Drive Cycle, REFER to AUTOMATIC TRANSMISSION - 6F50/6F55 . PROGRAM the PCM with the ATC solenoid bar code information, REFER to AUTOMATIC TORQUE COUPLING (ATC) CONFIGURATION . PERFORM the AWD DRIVE CYCLE .
- No : INSTALL a new rear axle. REFER to REAR DRIVE AXLE/DIFFERENTIAL . PROGRAM the PCM with the ATC solenoid bar code information. REFER to AUTOMATIC TORQUE COUPLING (ATC) CONFIGURATION . PERFORM the AWD DRIVE CYCLE .
- Measure the component side resistance
between.