Wiper System & Washer System - Electrical Diagnostics: Other Jeep Commander I

Monitor Conditions

1. When Monitored: With the ignition on.

Set Conditions

1. Set Condition: Rain Sensor Module supply voltage less than 8.0 volts.

Possible Causes

1. When Monitored: With the ignition on.

1. Set Condition: Rain Sensor Module supply voltage greater than 16.0 volts.

1. When Monitored: With the ignition on.

1. Set Condition: This DTC is set when the internal initialization state machine is set to FAIL.

1. When Monitored: With the ignition on.

1. Set Condition: The Rain Sensing Module detects an internal failure.

1. When Monitored
2. With the ignition on.

1. Set Condition
2. When the Steering Control Module detects a short/LOW condition.

1. When Monitored
2. With the ignition on.

1. Set Condition
2. When the Steering Control Module detects a short/HIGH condition.

1. When Monitored
2. With the ignition on.

1. Set Condition
2. The FCM detects a short to ground condition.

Scheme 53

Scheme 54

1. 1) INTERMITTENT CONDITION Turn the ignition on. With the Scan Tool, clear all FCM DTC's. Turn the Wipers on. With the Scan Tool, read the Wiper DTC's. Does the Scan Tool read: B2304-WIPER PARK SWITCH INPUT CIRCUIT LOW? Yes Go to 2) . No The condition that caused the symptom is currently not present. Inspect the related wiring for a possible intermittent condition. Look for any chafed, pierced, pinched, or partially broken wires. Perform «BODY VERIFICATION TEST»(ref-288232-S30638820392008062000000) .
2. 2) WIPER MOTOR With the scan tool, erase DTCs. Turn the ignition off. Disconnect the Front Wiper Motor harness connector. Turn the ignition on. Wait 30 seconds With the scan tool, read DTCs. Does the Scan Tool read: B2305-WIPER PARK SWITCH INPUT CIRCUIT HIGH? Yes Replace the Front Wiper Motor in accordance with the service information. Perform «BODY VERIFICATION TEST»(ref-288232-S30638820392008062000000) . No Go to 3) .
3. 3) (W7) FRONT WIPER MOTOR PARK SWITCH SENSE CIRCUIT SHORT TO GROUND Turn the ignition off. Disconnect the IPM C1 harness connector. Measure the resistance between ground and the (W7) Front Wiper Park Switch Sense circuit. Is the resistance below 5.0 ohms? Yes Repair the (W7) Front Wiper Park Switch Sense circuit for a short to ground condition. Perform «BODY VERIFICATION TEST»(ref-288232-S30638820392008062000000) . No Replace the Front Control Module in accordance with the service information. Perform «BODY VERIFICATION TEST»(ref-288232-S30638820392008062000000) .

Scheme 55

1. When Monitored
2. With the ignition on.

1. Set Condition
2. The FCM detects an open condition.

Scheme 56

1. 1) INTERMITTENT CONDITION Turn the ignition on. With the Scan Tool, clear all FCM DTC's. Turn the Front Wipers on. With the Scan Tool, read the Front Wiper DTC's. Does the Scan Tool read: B2305-WIPER PARK SWITCH INPUT CIRCUIT HIGH? Yes Go to 2) . No The condition that caused the symptom is currently not present. Inspect the related wiring for a possible intermittent condition. Look for any chafed, pierced, pinched, or partially broken wires. Perform «BODY VERIFICATION TEST»(ref-288232-S30638820392008062000000) .
2. 2) (W7) FRONT WIPER PARK SWITCH SENSE CIRCUIT SHORT TO VOLTAGE Turn the ignition off. Disconnect the Front Wiper Motor harness connector. Disconnect the IPM C1 harness connector. Measure the voltage on the (W7) Front Wiper Park Switch Sense circuit. Is the voltage above 5.0 volts? Yes Repair the (W7) Front Wiper Park Switch Sense circuit for a short to voltage. Perform «BODY VERIFICATION TEST»(ref-288232-S30638820392008062000000) . No Replace the FCM in accordance with the service information. Perform «BODY VERIFICATION TEST»(ref-288232-S30638820392008062000000) .

1. When Monitored: With the ignition on.

1. Set Condition: When the Steering Control Module detects a short/HIGH condition.

1. When Monitored: With the ignition on.

1. Set Condition: When the Steering Control Module detects a short/HIGH condition.

1. When Monitored
2. With the ignition on.

1. Set Condition
2. When the FCM detects a short/low condition.

1. When Monitored
2. With the ignition on.

1. Set Condition
2. When the FCM detects a short/HIGH condition.

1. When Monitored
2. With the ignition on.

1. Set Condition
2. When the FCM detects a short/low condition.

1. When Monitored
2. With the ignition on.

1. Set Condition
2. When the FCM detects a short/low condition.

Scheme 57

1. 1) (A5) FUSED B+ CIRCUIT OPEN NOTE: Check all fuses and circuit breakers before proceeding with the diagnosis of this DTC. Turn the ignition on. Remove the Wiper HI/LOW relay. Measure the voltage at cavity 86 of the Wiper HI/LOW relay. Is the voltage above 10.0 volts? Yes Go to 2) . No Check the (A5) Fused B+ circuit for an open. Perform «BODY VERIFICATION TEST»(ref-288232-S30638820392008062000000) .
2. 2) WIPER HI/LOW RELAY Turn the ignition off. Replace the Wiper HI/LOW relay with a known good relay. Turn the ignition on. With the Scan Tool, clear all FCM DTC's. Turn the Wipers ON then OFF. With the Scan Tool, read the Wiper DTC's. Does the Scan Tool read: B2317-WIPER HI/LOW CONTROL CIRCUIT LOW? Yes Go to 3) . No Replace the Wiper HI/LOW relay. Perform «BODY VERIFICATION TEST»(ref-288232-S30638820392008062000000) .
3. 3) INTEGRATED POWER MODULE Turn the ignition off. Disconnect the FCM from the IPM. Measure the voltage on cavity 29 (Wiper HI/LOW Relay Control) of the IPM. Is the voltage above 10.0 volts? Yes Replace the FCM in accordance with the service information. Perform «BODY VERIFICATION TEST»(ref-288232-S30638820392008062000000) . No Replace the IPM in accordance with the service information. Perform «BODY VERIFICATION TEST»(ref-288232-S30638820392008062000000) .

1. When Monitored
2. With the ignition on.

1. Set Condition
2. When the FCM detects a short/HIGH condition.

1. When Monitored
2. With the ignition on.

1. Set Condition
2. When the FCM detects a short/low condition.

1. When Monitored
2. With the ignition on.

1. Set Condition
2. When the FCM detects a short/low condition on the washer Pump Motor Control circuit.

Scheme 58

Scheme 59

Scheme 60

Scheme 61

1. 1) INTERMITTENT CONDITION Turn the ignition on. With the Scan Tool, clear all FCM DTC's. Turn the Washers on. With the Scan Tool, read the Wiper/Washers DTC's. Does the Scan Tool read: B231F-FRONT/REAR WASHER MOTOR CONTROL CIRCUIT LOW? Yes Go to 2) . No The condition that caused the symptom is currently not present. Inspect the related wiring for a possible intermittent condition. Look for any chafed, pierced, pinched, or partially broken wires. Perform «BODY VERIFICATION TEST»(ref-288232-S30638820392008062000000) .
2. 2) WASHER PUMP MOTOR Turn the ignition off. Disconnect the Washer Pump Motor connector. Turn the ignition on. With the Scan Tool, read the DTC's. Does the Scan Tool read:B231F-FRONT/REAR WASHER MOTOR CONTROL CIRCUIT LOW? Yes Go to 3) . No Replace the Washer Pump Motor in accordance with the service information. Perform «BODY VERIFICATION TEST»(ref-288232-S30638820392008062000000) .
3. 3) (W10)/(W20) WASHER PUMP MOTOR CONTROL CIRCUITS SHORT TOGETHER Turn the ignition off. Disconnect the Washer Pump Motor harness connector. Disconnect the IPM C1 harness connector. Measure the resistance between the (W10) and (W20) Washer Pump Motor Control circuits. Is the resistance below 5.0 ohms? Yes Repair the (W10) and (W20) Washer Pump Motor Control circuits for a short together. Perform «BODY VERIFICATION TEST»(ref-288232-S30638820392008062000000) . No Go to 4) .
4. 4) (W10) WASHER PUMP MOTOR CONTROL CIRCUIT SHORT TO GROUND Measure the resistance between ground and the (W10) Washer Pump Motor Control circuit. Is the resistance below 5.0 ohms? Yes Repair the (W10) Washer Pump Motor Control circuit for a short to ground. Perform «BODY VERIFICATION TEST»(ref-288232-S30638820392008062000000) . No Go to 5) .
5. 5) (W20) WASHER PUMP MOTOR CONTROL CIRCUIT SHORT TO GROUND Measure the resistance between ground and the (W20) Washer Pump Motor Control circuit. Is the resistance below 5.0 ohms? Yes Repair the (W20) Washer Pump Motor Control circuit for a short to ground. Perform «BODY VERIFICATION TEST»(ref-288232-S30638820392008062000000) . No Replace the Front Control Module in accordance with the service information. Perform «BODY VERIFICATION TEST»(ref-288232-S30638820392008062000000) .

Scheme 62

1. When Monitored: With the ignition on.

1. Set Condition: The FCM detects an open condition.

Scheme 63

Scheme 64

1. 1) INTERMITTENT CONDITION Turn the ignition on. With the Scan Tool, clear all FCM DTC's. Turn the Washers on. With the Scan Tool, read the Wiper/Washers DTC's. Does the Scan Tool read: B2320-FRONT/REAR WASHER MOTOR CONTROL CIRCUIT HIGH? Yes Go to 2) . No The condition that caused the symptom is currently not present. Inspect the related wiring for a possible intermittent condition. Look for any chafed, pierced, pinched, or partially broken wires. Perform «BODY VERIFICATION TEST»(ref-288232-S30638820392008062000000) .
2. 2) (W10) WASHER PUMP MOTOR CONTROL CIRCUIT SHORT TO VOLTAGE Turn the ignition off. Disconnect the IPM C1 harness connector. Disconnect the Washer Pump Motor harness connector. Turn the ignition on. Measure the voltage of the (W10) Washer Pump Motor Control circuit. Is the voltage above 5.0 volts? Yes Repair the (W10) Washer Pump Motor Control circuit for a short to voltage. Perform «BODY VERIFICATION TEST»(ref-288232-S30638820392008062000000) . No Go to 3) .
3. 3) (W20) WASHER PUMP MOTOR CONTROL CIRCUIT SHORT TO VOLTAGE Measure the Voltage of the (W20) Washer Pump Motor Control circuit. Is the voltage above 5.0 volts? Yes Repair the (W20) Washer Pump Motor Control circuit for a short to voltage. Perform «BODY VERIFICATION TEST»(ref-288232-S30638820392008062000000) . No Replace the Front Control Module in accordance with the service information. Perform «BODY VERIFICATION TEST»(ref-288232-S30638820392008062000000) .

Scheme 65

1. When Monitored: With the ignition on.

1. Set Condition: When the FCM detects a high condition.

Scheme 66

1. 1) INTERMITTENT CONDITION Turn the ignition on. With the Scan Tool, clear all FCM DTC's. Turn the Wipers on. With the Scan Tool, read the Wiper DTC's. Does the Scan Tool read: B2328-WASHER FLUID LEVEL SENSOR INPUT CIRCUIT HIGH? Yes Go to 2) . No The condition that caused the symptom is currently not present. Inspect the related wiring for a possible intermittent condition. Look for any chafed, pierced, pinched, or partially broken wires. Perform «BODY VERIFICATION TEST»(ref-288232-S30638820392008062000000) .
2. 2) (W1) WASHER FLUID LEVEL SENSOR SIGNAL CIRCUIT SHORT TO VOLTAGE Turn the ignition off. Disconnect the Washer Fluid Level Sensor connector. Disconnect the Front Control Module C1 connector. Turn the ignition on. Measure the voltage of the (W1) Washer Fluid Level Sensor Signal circuit. Is the voltage above 5.0 volts? Yes Repair the (W1) Washer Fluid Level Sensor Signal circuit for a short to voltage. Perform «BODY VERIFICATION TEST»(ref-288232-S30638820392008062000000) . No Replace the Front Control Module in accordance with the service information. Perform «BODY VERIFICATION TEST»(ref-288232-S30638820392008062000000) .

1. When Monitored: With the ignition on.

1. Set Condition: Each optical track (received value) is monitored once a second while the rain sensor is active (WK Intermittent 1-5, LX intermittent 1-6) and compared to a small value. The optical track value must be below this value for 4 minutes (checked once per second) before this DTC will be set. Once the DTC is set, the optical track must be above the threshold for 4 minutes (checked once per second) before the DTC is cleared.

1. When Monitored: With the ignition on.

1. Set Condition: Each optical track (received value) is monitored once a second while the rain sensor is active (WK Intermittent 1-5, LX intermittent 1-6) and compared to a small value. The optical track value must be below this value for 4 minutes (checked once per second) before this DTC will be set. Once the DTC is set, the optical track must be above the threshold for 4 minutes (checked once per second) before the DTC is cleared.

1. When Monitored: With the ignition on.

1. Set Condition: Each optical track (received value) is monitored once a second while the rain sensor is active (WK Intermittent 1-5, LX intermittent 1-6) and compared to a small value. The optical track value must be below this value for 4 minutes (checked once per second) before this DTC will be set. Once the DTC is set, the optical track must be above the threshold for 4 minutes (checked once per second) before the DTC is cleared.

1. When Monitored: With the ignition on.

1. Set Condition: Each optical track (received value) is monitored once a second while the rain sensor is active (WK Intermittent 1-5, LX intermittent 1-6) and compared to a small value. The optical track value must be below this value for 4 minutes (checked once per second) before this DTC will be set. Once the DTC is set, the optical track must be above the threshold for 4 minutes (checked once per second) before the DTC is cleared.

1. When Monitored: With the ignition on.

1. Set Condition: The SCM detects the Washer Switch in the STUCK state.

1. When Monitored: With the ignition on.

1. Set Condition: The SCM detects the Rear Washer Switch in the STUCK state.

1. When Monitored: With the ignition on.

1. Set Condition: The SCM detects the Mist Switch in the STUCK state.

1. When Monitored: Continuously.

1. Set Condition: If the Can B Bus (+) or B Bus (-) circuit is open, shorted to voltage, or shorted to ground.

Scheme 67

Scheme 68

1. 1) CHECK FOR ACTIVE DTC U0019-CAN B BUS Turn the ignition on. With the scan tool, record and erase any Electronic Overhead Module DTCs. Turn the ignition off, wait 30 seconds then turn the ignition on. With the scan tool, read DTCs. Is DTC U0019-CAN B BUS active? Yes Go to 2) . No The condition that caused this code to set is not present at this time. Check for an intermittent condition by inspecting the related wiring harness for chafed, pierced, pinched, and partially broken wires. Also inspect the related connectors for broken, bent, pushed out, spread, corroded, or contaminated terminals. Perform «BODY VERIFICATION TEST»(ref-288232-S30638820392008062000000) .
2. 2) CHECK FOR ACTIVE CAN B BUS RELATED DTCS IN THE FRONT CONTROL MODULE With the scan tool, read Front Control Module DTCs Does the scan tool display any active CAN B BUS related DTCs? Yes Diagnose and repair the DTC(s). Refer to «DIAGNOSIS AND TESTING»(ref-288232-S40396979612008062000000) . No Go to 3) .
3. 3) CHECK (D55) CAN B BUS (+) CIRCUIT FOR AN OPEN Turn the ignition off. Disconnect the negative battery cable. Disconnect the Electronic Overhead Module harness connector. Disconnect the Front Control Module C1 harness connector. Measure the resistance of the (D55) Can B Bus (+) circuit between the Front Control Module C1 harness connector and the Electronic Overhead Module harness connector. Is the resistance below 5.0 ohms? Yes Go to 4) . No Repair the Can B Bus (+) circuit for an open. Perform «BODY VERIFICATION TEST»(ref-288232-S30638820392008062000000) .
4. 4) CHECK THE (D54) CAN B BUS (-) CIRCUIT FOR AN OPEN Measure the resistance of the (D54) Can B Bus (-) circuit between the Front Control Module C1 harness connector and the Electronic Overhead Module harness connector. Is the resistance below 5.0 ohms? Yes Replace the Electronic Overhead Module in accordance with the service information. Perform «BODY VERIFICATION TEST»(ref-288232-S30638820392008062000000) . No Repair the Can B Bus (-) circuit for an open. Perform «BODY VERIFICATION TEST»(ref-288232-S30638820392008062000000) .