Pinpoint Test B: Transmission Control (TC)/Overdrive (O/D) Cancel Switch Does Not Operate Correctly

B1 TEST THE INSTRUMENT CLUSTER (IC)
- Connect the diagnostic tool.
- Using the scan tool, monitor the TC switch PID while cycling the TC (O/D cancel) switch.
- Does the TC switch PID cycle from depressed to not depressed?
1. YES : REFER to INSTRUMENT CLUSTER .
2. NO : Go to B2.
B2 CHECK SMART JUNCTION BOX (SJB) FUSE 30 (5A)
- Key in OFF position.
- Check fuse: SJB Fuse 30 (5A).
- Is the resistance less than 5 ohms?
1. YES : Go to B3.
2. NO : Go to B4.
B3 TEST THE TC (O/D CANCEL) SWITCH POWER CIRCUIT FOR AN OPEN
- Disconnect: Selector Lever Harness Connector C3245
- Disconnect: SJB Fuse 30 (5A)
- Measure the resistance between selector lever harness connector C3245-6, circuit CBP30 (YE/BU) and the output side of SJB fuse 30 (5A).
- Is the resistance less than 5 ohms?
1. YES : Go to B5.
2. NO : REPAIR the circuit CBP30 (YE/BU) for an open. RECONNECT all components. TEST the system for normal operation.
B4 TEST THE TC (O/D CANCEL) SWITCH POWER CIRCUIT FOR A SHORT TO GROUND
- Disconnect: Selector Lever Harness Connector C3245
- Disconnect: SJB Fuse 30 (5A)
- Measure the resistance between selector lever harness connector C3245-6, circuit CBP30 (YE/BU) and ground.
- Is the resistance greater than 10,000 ohms?
1. YES : Go to B6.
2. NO : REPAIR circuit CBP30 (YE/BU) for a short to ground. RECONNECT all components. TEST the system for normal operation.
B5 TEST THE TC (O/D CANCEL) SWITCH SIGNAL CIRCUIT FOR AN OPEN
- Disconnect: PCM Connector C175b
- Measure the resistance between selector lever harness connector C3245-5, circuit CET34 (BN/GN) and PCM connector C175b-16, circuit CET34 (BN/GN).
- Is the resistance less than 5 ohms?
1. YES : Go to B7.
2. NO : REPAIR circuit CET34 (BN/GN) for an open. RECONNECT all components. TEST the system for normal operation.
B6 TEST THE TC (O/D CANCEL) SWITCH SIGNAL CIRCUIT FOR A SHORT TO GROUND
- Measure the resistance between selector lever harness connector C3245-5, circuit CET34 (BN/GN) and ground.
- Is the resistance greater than 10,000 ohms?
1. YES : Go to B7.
2. NO : REPAIR circuit CET34 (BN/GN) for a short to ground. TEST the system for normal operation.
B7 TEST THE TC (O/D CANCEL) SWITCH
- Measure the resistance between selector lever connector C3245-5 and C3245-6, component side, while cycling the TC (O/D cancel) switch.
- Is the resistance less than 5 ohms when pressed and greater than 10,000 ohms when released?
1. YES : INSTALL a new PCM. REFER to ELECTRONIC ENGINE CONTROLS . TEST the system for normal operation.
2. NO : INSPECT the selector lever wiring harness for damage and repair as necessary. If the selector lever wiring harness is not damaged, INSTALL a new selector lever knob. REFER to Selector Lever Knob . TEST the system for normal operation.