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1997 Chevrolet Chevy K Pickup DTC P0152 HO2S Circuit High Voltage Bank 2 Sensor 1 Repair Manual

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The number below refers to the step number on the diagnostic table. 2. This test determines if the conditions exist in order to set the DTC P0152. 3. If the HO2S (Bank 2, Sensor 1) is intrnally shorted, the HO2S (Bank 2, Sensor 1) voltage displayed on a scan tool will be over 1.0 volt (1000 mV). Important: Before clearing DTCs, use the scan tool in order to record the Freeze Frame and the Failure Records for reference. This data will be lost when the Clear DTC Information function is used. Was the Powertrain On-Board Diagnostic (OBD) System Check performed? — Go to Step 2 Go to Powertrain On Board Diagnostic (OBD) System Check 2 1. Connect the scan tool. 2. Run the engine at the normal operating temperature. 3. Place the vehicle in park or neutral. 4. Apply the parking brake. 5. Increase the engine speed to the specified value. Does the scan tool data display indicate HO2S sensor voltage fixed above the specified value? 1200 RPM 0.976 V (976 mV) Go to Step 3 Go to Step 4 3 1. Disconnect the HO2S. 2. Turn on the ignition while leaving the engine OFF. 3. Turn ON the ignition leaving the engine off. Does the scan tool data display indicate the HO2S voltage near the specified value? 400 mV) Go to Step 6 Go to Step 5 4 The DTC is intermittent. Are any additional DTCs set? — Go to the applicable DTC table Go to Diagnostic Aids 5 1. Check for a short to voltage in the HO2S Signal circuit. 2. If a problem is found, repair the circuit as necessary. Refer to Wiring Repairs in Electrical Diagnosis. Was the HO2S Signal circuit shorted? — Go to Step 8 Go to Step 7 6 Replace the HO2S. Refer to Heated Oxygen Sensor (HO2S) Replacement . Is the action complete? — Go to Step 8 — 7 Replace the VCM. Important: When replacing the VCM, the new VCM will need to be programed. Refer to VCM Replacement/Programming . Is the action complete? — Go to Step 8 — 1. Use the scan tool in order to select the DTC and the Clear DTC Information functions.

Kia 2002 Saturn SL will set if TP sensor voltage is less than 0.2 volts

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The throttle position (TP) sensor is a potentiometer that varies resistance according to changes in throttle plate position. The powertrain control module (PCM) measures the signal voltage from the TP sensor which is a reduced value of the PCM 5-volt reference. The voltage ranges from 0.4 (+/-0.2) volts at 0% throttle position to 4.7 volts at wide open throttle. DTC P0122 sets when the TP sensor signal voltage at the PCM is below the calibrated voltage value. DTC Parameters DTC P0122 will set if TP sensor voltage is less than 0.2 volts when: z The condition exists for longer than 10 seconds. z The ignition is ON. DTC P0122 diagnostic runs continuously with ignition ON. DTC P0122 is a type A DTC. Diagnostic Aids Important If DTC P1635 is set, diagnose that DTC first. 2002 Saturn SL
To locate an intermittent problem, use a scan tool to monitor TP SENSOR voltage with ignition ON, engine OFF. Wiggling the wires while watching for a change in TP SENSOR voltage may locate the area where an open or short to ground in the wiring could lie. An intermittent open in the TP SENSOR can cause this DTC to set. Use the scan tool to monitor TP SENSOR as the accelerator pedal is slowly depressed. The voltage should change smoothly from 0.4 volts at 0% throttle, to 4.7 volts at wide open throttle (+/-0.2 volts).

1999 Jeep Grand Cherokee Limited AUTOMATIC TRANSMISSIONS Chrysler 45RFE Electronic Controls Repair Manual

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INTERNAL TCM Circuit Description The TCM is reporting internal errors. Diagnostic Procedure 1. Turn ignition switch to LOCK position. Remove transmission control relay. Measure resistance between ground and relay ground circuit (Black/Yellow wire) in relay connector. If resistance is greater than 5 ohms, repair open circuit. If resistance s not greater than 5 ohms, go to next step. 2. The TCM has an internal problem and must be replaced. P0715: INPUT SPEED SENSOR ERROR Circuit Description DTC P0715 will set if an excessive change in input RPM has been detected in any gear. Possible Causes * Intermittent wiring and connector problems. * Faulty input speed sensor. * Input speed sensor circuits shorted to ground, shorted to voltage, or open. * Faulty TCM. Diagnostic Procedure 1. Place gear selector in “P” position and start engine. Using scan tool, monitor input speed sensor value. If value is less than 400 RPM, go to next step. If value is not less than 400 RPM, go to step 9. 2. Turn ignition switch to LOCK position. Install Transmission Simulator (8333). Turn ignition on. Using transmission simulator, turn rotary knob to middle (1000/3000) position. Turn INPUT/OUTPUT switch on. Using scan tool, monitor input and output speed sensor values. If input speed sensor value is 2950- 3050 RPM and output speed sensor value is 950-1050 RPM, replace input speed sensor. If speed sensor values are not as specified, go to next step. 3. Turn ignition switch to LOCK position. Disconnect TCM harness connector. Remove transmission control relay. Using fused jumper wire, jumper fused B+ circuit (Red/White wire) and transmission relay output circuit (Red wire) together at relay connector. Turn ignition on. Measure voltage between ground and input speed sensor signal circuit (Red/Black wire) at TCM harness connector. If voltage is greater than 3 volts, repair circuit for short to voltage. If voltage is not greater than 3 volts, remove jumper wire, install relay and go to next step. 4. Turn ignition switch to LOCK position. Disconnect input speed sensor harness connector. Measure resistance of input speed sensor signal circuit (Red/Black wire) between TCM and input speed sensor. If resistance is greater than 5 ohms, repair open circuit. If resistance is not greater than 5 ohms, go to next step. 5. Measure resistance of input speed sensor ground circuit (Dark Blue/Black wire) between TCM and input

FRONT WHEEL SPEED SENSOR CORROSION REPAIR MANUAL

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1999-2002 CHEVROLET SILVERADO 2000-2002 CHEVROLET TAHOE, SUBURBAN 2002 CHEVROLET AVALANCHE 1999-2002 GMC SIERRA 2000-2002 GMC YUKON, YUKON XL LOCATED IN THE SEVERE CORROSION AREAS LISTED BELOW Service Procedure The following procedure provides instructions for repairing a corrosion condition where the front wheel speed sensor mounts on the front wheel bearing assembly. 1. Raise the vehicle on a suitable hoist and support as necessary. 2. Remove both front tires and wheels. 3. Compress the front brake caliper pistons. 3.1. Install a large C-clamp over the top of the caliper housing and against the back of the outboard pad. 3.2. Slowly tighten the C-clamp until the pistons are pushed completely into the caliper bores. 3.3. Remove the C-clamp from the caliper. Important: It is not necessary to remove the front brake caliper from the bracket when removing the bracket in the next step. 4. Remove the two bolts that attach the front brake caliper mounting brackets to the knuckle. Notice: Support the brake caliper with heavy mechanic’s wire, or equivalent, whenever it is separated from its mount, and the hydraulic flexible brake hose is still connected. Failure to support the caliper in this manner will cause the flexible brake hose to bear the weight of the caliper, which may cause damage to the brake hose and in turn may cause a brake fluid leak. 5. Remove the brake caliper and bracket as an assembly and support it with heavy mechanic’s wire or equivalent. DO NOT disconnect the hydraulic brake flexible hose from the caliper. 6. Mark the relationship of the rotor to the bearing hub. 7. If equipped, remove the rotor retaining push nuts from the wheel studs

1996 Pontiac Grand Am DTC P0502 Vehicle Speed Sensor (VSS) Circuit Low Input (3.1L VIN M) Service Manual

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Action Taken When the DTC Sets Conditions for Clearing the MIL/DTC Diagnostic Aids Test Description The numbers below refer to the step numbers on the diagnostic table. 2. This step verifies that the PCM is receiving a signal from the vehicle speed sensor. 3. This step verifies that there are no opens in the circuitry from the vehicle speed sensor to the PCM connector. 7. This step performs a resistance test on the VSS circuits from the PCM connector. • The transmission defaults to 3rd gear. • The PCM inhibits TCC operation. • The PCM illuminates the Malfunction Indicator Lamp (MIL). • The PCM turns OFF the MIL after three consecutive ignition cycles without a failure reported. • A scan tool can clear the DTC from the PCM history. The PCM clears the DTC from the PCM history if the vehicle completes 40 warm-up cycles without a failure reported. • The PCM cancels the DTC default actions when the fault no longer exists and the ignition is OFF long enough in order to power down the PCM. • Check for PRNDL DTC P0705. DTC P0705 affects transmission operation. This may set DTC P0502 falsely. • Check for Electromagnetic Interference (EMI) in circuits 400 and 401. EMI may be induced if the harness is routed along the spark plug wires. • Inspect the wiring for poor electrical connections at the PCM. Inspect the wiring at the TCC brake switch. Look for the following conditions: – A bent terminal – A backed out terminal – A damaged terminal – Poor terminal tension – A chafed wire – A broken wire inside the insulation • When diagnosing for an intermittent short or open condition, massage the wiring harness while watching the test equipment for a change. • Ensure that the VSS is securely tightened to the case extension. DTC P0502 Vehicle Speed Sensor Circuit (VSS) Low Input